C08.0 Attachment 4 Denison-Pump-P24-P30S.pdf

Publ. LT3-00032-2-A 8/03

DENISON HYDRAULICS

axial piston pump goldcup series P24P/S E-mod., P30P/S B-mod.

service information

The product information, specifications, and descriptions contained in this publication have been compiled for the use and convenience of our customers from information furnished by the man-ufacturer; and we can not, and do not, accept any responsibility for the accuracy or correctness of any description, calculation, specification, or information contained herein. No such descrip-tion, calculation, specification, or information regarding the products being sold has been made part of the basis of the bargain, nor has same created or amounted to an express warranty that the products would conform thereto. We are selling the goods and merchandise illustrated and described on this publication on an "as is" basis, and disclaim any implied warranty, including any warranty of merchantability or warranty of fitness for any particular purpose whatsoever, with respect to the goods and merchandise sold. All manufacturer warranties shall be passed on to our customers, but we shall not be responsible for special, indirect, inci-dental, or consequential damages resulting from the use of any of the products or information contained or described on this publication. Further, we reserve the right to revise or otherwise make product improvements at any time without notification.

CONTENTS

PAGE

technical characteristics 3 fluid connections 4 seal kits 4 introduction 5 description 5 mounting 5 rear pump mounting 5 shaft information 5 piping 5 recommended fluids 6 viscosity 6 viscosity index 6 temperature 6 alternate fluids 6 fluid cleanliness 6 comparison of solid contamination classification system 6 filling case 7 service information 7 maintenance 7 start up procedures for new installations 7 trouble shooting 8 assembly tool drawings T1,T2,T3, and T4 10 disassembly procedures 11 rework limits of wear parts 13 assembly procedures 15 figure 1 shaft and bearing assembly 15 figure 2 rocker cam, piston-shoes & retainer 15 cam and cradle assemblies 16 rocker cam 17 piston and shoe 18 figure 3 mounting flange, cam & cradle, barrel & auxiliary shaft 18 figure 4 barrel and auxiliary drive shaft 24 series 19 figure 4.1 barrel and auxiliary drive shaft 30 series 20 figure 5 housing 20 figure 6 housing, end cap cam and barrel 21 mechanical shaft seal 21 figure 7 seal assembly 22 counter balance plate 23 servo plate 23 control cover 23 figure 8 port block 24 port block installation 24 figure 9 barrel holddown and auxiliary pump 24 series 25 barrel holddown and auxiliary pump 30 series 26 auxiliary pump and end cover 26 figure 10 rear drive adapter and shuttle valve 27 rear drive adapter 28 pilot valve 28 shuttle valve 28 figure 11 exploded view of shuttle valve and pilot valve ext. drain 29 shuttle valve adapter 30 shuttle valve mounting 30 valve block assembly 30 figure 12 valve block assembly 32 valve block for servo valve 33 figure 13 valve block for servo valve 36 test procedure 37 alternate test procedure 38 control test - refer to control service manual S1-AM030 39 hydraulic circuit P24/30P 41 hydraulic circuit P24/30S 42 installation drawings 43-61 ordering code 62 conversions & formulas 65

TECHNICAL CHARACTERISTICS

specification term Goldcup 24 Goldcup 30

•displacement at max. angle in3/rev. 24.6 30.6 cm3/rev. 403 501,4

•pressure, continuous psi 5000 5000 bar 345 345

•speed max. continuous at full stroke rpm 21001) 1800 consult DENISON HYDRAULICS for higher speeds

•flow, ports A or B at 1500 rpm gpm 159.7 198.7 theo. at max. displ. Lpm 604,6 752,1 at 1800 rpm gpm 191.7 238.4 Lpm 725,5 902,5 at 2100 rpm gpm 223.6 - Lpm 846 -

P24P P30P •aux. pump theor. displ. / rev.

2) in3/rev 2.81 2.81 cc/rev 46,1 46,1

P24S3) P30S3) in3/rev 1.05 1.05 cc/rev 17,2 17,2

P24P P30P •flow, auxiliary pump at 1500 rpm gpm 18.2 18.2 internal - theo. flow Lpm 69,1 69,1 at 1800 rpm gpm 21.9 21.9 Lpm 82,9 82,9 at 2100 rpm gpm 25.5 - Lpm 96,7 -

P24S3) P30S3) at 1500 rpm gpm 6.5 6.5 Lpm 24,5 24,5 at 1800 rpm gpm 7.8 7.8 Lpm 29,5 29,5

P24S3) P30S3)

•flow, auxiliary pump at 1500 rpm 4) gpm 18.2 18.2 external - standard T6C-025 Lpm 69,1 69,1 at 1800 rpm gpm 21.9 21.9 Lpm 82,9 82,9

P24P P24S P30P P30S •aux. pump servo pressure range psi 340-640 490-790 360-772 490-902 varies upward with pressure in bar 23-44 34-54 25-53 34-62 port A or B, based on 0 psi 0 bar case pressure

P24P P24S P30P P30S •Aux. pump replenishing pressure psi 180-220 330-370 180-220 330-370 based on 0 psi 0 bar case pressure bar 12-15 23-26 12-15 23-26

•mounting SAE 177-4 177-4 (“F” 4- bolt) (“F” 4- bolt)

•shaft-spline or keyed SAE 50-1,4 50-1,4 (“F”) (“F”)

•weight P24P P24S P30P P30S lbs 690 755 710 787 kg 313 342 322 357

1)On R & O oils rust and oxidation inhibitor.

2)Standard, other sizes available.

3)Internal cartridge provides servo flow and must be supercharged from external replenishing flow. from external auxiliary pump 4)Any SAE 82-2 or SAE 101-2 mounting pump may be used, with the corresponding adapters.

TECHNICAL

CHARACTERISTICS

SEAL KITS

FLUID CONNECTIONS Refer to page 40 for specifications

SEAL KITS seal kit, P24/30 complete (includes control seals) valve block seal kit (all) shaft seal kit shaft seal controls seal kit (all – input & output)

Seal Kits for P24-30 Gold Cup Pumps

CIPR MOD. SERIES SHAFT

TYPE

ROT. COMPLETE

SEAL KIT

SHUTTLE SHAFT SEAL KIT

P S23-18006- ⊕ K

R S23-18016- ⊕ K

X

2,3 R & L

S23-11514- ⊕ K

S23-11516- ⊕ K

P 7,8 R S23-17038- ⊕ K S23-16332- ⊕ K

P 7,8 L S23-17039- ⊕ K S23-16333- ⊕ K

R 7,8 R S23-18017- ⊕ K S23-16332- ⊕ K

R 7,8 L S23-18018- ⊕ K S23-16333- ⊕ K

X 7,8 R S23-18022- ⊕ K S23-16332- ⊕ K

24,30 E & B

X 7,8 L S23-18023- ⊕ K

N/A

S23-16333- ⊕ K

S S23-17040- ⊕ K

L 2,3 R & L

S23-18019- ⊕ K S23-11516- ⊕ K

S 7,8 R S23-17041-⊕ K S23-16332- ⊕ K

S 7,8 L S23-17042-⊕ K S23-16333- ⊕ K

L 7,8 R S23-18020- ⊕ K S23-16332- ⊕ K

24,30 E & B

L 7,8 L S23-18021- ⊕ K

S23-15089- ⊕ K

S23-16333- ⊕ K

Seal Kits for P24-30 Gold Cup Pumps with T6C Auxiliary Pumps

CIPR MOD. SERIES SHAFT

TYPE

ROT. COMPLETE

SEAL KIT

SHUTTLE SHAFT SEAL KIT

2,3 R & L S23-11600- ⊕ K S23-11516- ⊕ K

7,8 R S23-15696-⊕ K S23-16332- ⊕ K 24,30 E & B S

7,8 L S23-15697-⊕ K

S23-15089- ⊕ K

S23-16333- ⊕ K

Notes: Add –0 FOR BUNA, –4 for EPR Rubber or –5 for VITON in place of ⊕ .

see chart below

S23-17338-⊕Κ see chart below 623-00015-5K

S23-17000-⊕Κ

INSTALLATION

The DENISON HYDRAULICS Goldcup 24 and 30 axial piston pumps feature advance design concepts which are time proven and provide for advanced pumping and control concepts. The instructions contained in this manual cover complete disassembly and re-assembly of the unit. Before proceeding with the disassembly or reassembly of any unit, this manual should be studied in ordered to become familiar with proper order and parts nomenclature.

The use of a rocker cam to control the pump displacement provides a small package size, reduces wear, and speeds control response. The control vane actuator eliminates linkage and backlash inherent in typical stroking cylinder designs.

Standard controls for the Goldcup units are rotary servo and compensator over-ride.

Additional optional controls are also available.

This pump is designed to operate in any position. The mounting hub and 4 bolt mount-ing flange are in full conformance with SAE standard. The pump shaft must be in align-ment with the shaft of the prime mover and should be checked with a dial indicator.

The mounting pad or adapter into which the fluid pump pilots must be concentric with the pump shaft to prevent bearing failure. This concentricity is particularly important if the shaft is rigidly connected to the prime mover without a flexible coupling.

Caution: P24/30S Only Shaft seal on coupling shaft isolates internal replenishing pressure from the external pump. An axial load in pounds equal to 1.23 x replenishing pressure, psi, or Newtons equal to 79,3 x replenishing pressure bar, will be exerted on the shaft of the rear mounted pump. Shaft bearing capacity of the external pump must be considered when applying external pump.

In any application it is advisable to check the alignment of the pump shaft to the prime mover to avoid side loading the pump shaft bearing and bending of the shaft.

The maximum allowable offset of the pump shaft and prime mover is 0.006 inch, 0,15 mm T.I.R. (Total indicator reading).

The maximum allowable angular misalignment is ±.002 inch per inch radius, 0,002 mm per mm radius.

Splined: The coupling interface must be lubricated. DENISON HYDRAULICS recom-mends lithium-molybdenum disulfide or similar grease. The female coupling should be hardened to 27-45 Rc and must conform to SAE-J498B(1971) class 1 flat root side fit.

Keyed: High strength heat treated keys must be used. Replacement keys must be hardened to 27-34 Rc. The key corners must be chamfered 0.030”-0.040”, 0,75-1mm at 450 to clear radii that exist in the keyway.

Note: Do not impact coupling to force it onto the shaft. A threaded hole, size M16 is provided in the end of the shaft.

Both types of shafts will accept a side load of 1000 lbs., 454 kg at the center of the spline or key, with a B10 life of 9880 hours at 1800 rpm or 11856 hours at 1500 rpm.

Connect inlet and outlet lines to the port block of the pump.

The maximum case pressure is 75 psi, 5,7 bar continuous, 125 psi, 8,6 bar intermit-tent. When connecting case drain line make certain that drain plumbing passes above highest point of the pump before passing to the reservoir. If not, install a 5 psi, 0,3 bar case pressure check valve to be certain the case is filled with oil at all times.

Note: High case pressure will result in reduced shaft bearing B10 life.

The case leakage line must be of sufficient size to prevent back pressure in excess of 75 psi, 5,7 bar and returned to the reservoir below the surface of the oil as far from the supply as possible. All fluid lines, whether pipe, tubing, or hose must be adequate size to assure free flow through the pump. We recommend 20 ft., 6,09 m max. per second for main flow and 4 ft., 1,4 m max. limit per second for suction lines. The case drain flow can exceed the steady state repl. pump flow during transient. Size the hose for 10 ft., 3,05 m, max. per second. Pressure rating of piping hose must be adequate for service duty required. An undersize inlet line will prevent the pump from operating at full rated speed. An undersized outlet line will create back pressure and cause heat generation and improper operation. Flexible hose lines are recommended to connect the pump to system piping. If rigid piping is used, the workmanship must be accurate to eliminate strain on the pump port block or to the fluid connections.

Sharp bends in the lines must be eliminated wherever possible. All system piping must be cleaned with solvent or equivalent before installing pump. Make sure the entire hydraulic system is free of dirt, lint, scale, or other foreign material. Flushing with a large temporary high pressure loop filter is recommended. Piping must be cleaned so that the fluid cleanliness specified below is maintained.

Caution: Do not use galvanized pipe. Galvanized coating can flake off with continued use.

INTRODUCTION

DESCRIPTION

MOUNTING

REAR PUMP MOUNTING

SHAFT INFORMATION

PIPING

The fluid recommended for use in these pumps has a petroleum base and contains agents which provide oxidation inhibition and anti-rust, anti-foam and de-aerating properties as described in DENISON HYDRAULICS standard HF-1. Where anti-wear additive fluids are specified, see DENISON HYDRAULICS standard HF-0.

Max. at cold start - 7500 SUS, 1600 Cst (at low pressure, low flow, and if possible, low speed) Max. at full power - 750 SUS, 160 Cst Optimum for max. life - 140 SUS, 30 Cst Minimum at full power - 60 SUS, 10 Cst

90 V.I. minimum. Higher values extend the range of operating temperature but may reduce the service life of the fluid.

Determine by the viscosity characteristics of the fluid used. Because high temperatures degrade seals, reduce the service life of the fluid and create hazards, fluid temperatures should not exceed 1800 F, 820 C at the case drain.

Some applications require fire-resistant fluids. They will give good service if the system is originally designed for their use. Permissible fire resistant fluids include:

Type DENISON HYDRAULICS Standard Water-in-oil invert emulsions HF-3 Water glycol solutions HF-4 Phosphate esters HF-5

Consult DENISON HYDRAULICS for design requirements and warranty limitations for service with this class of fluids.

See DENISON HYDRAULICS bulletin SP0-AM305 for more information.

Fluid must be cleaned before and continuously during operation, by filters that maintain a cleanliness level of NAS 1638 class 8 (class 9 for 15 micron and smaller). This approximately corresponds to ISO 17/14. This fluid level cleanliness can usually be accomplished by the effective use of 10 micron filters. Better cleanliness levels will significantly extend the life of the components. As contaminant generation may vary with each application, each must be analyzed to determine proper filtration to maintain the required cleanliness level.

RECOMMENDED FLUIDS

VISCOSITY

VISCOSITY INDEX

TEMPERATURE

ALTERNATE FLUIDS

FLUID CLEANLINESS

COMPARISON OF SOLID CONTAMINATION CLASSIFICATION SYSTEM

NATIONAL AERONAUTICS STANDARD (NAS) 1638

class 00 0 1 2 3 4 5 6 7 8 9 10 11 12

5-15mm 125 250 500 1000 2000 4000 8000 16000 32000 64000 128000 256000 512000 1024000 particle 15-25mm 22 44 89 178 356 712 1425 2850 5700 11400 22800 45600 91200 182400 size 25-50mm 4 8 16 32 63 126 253 506 1012 2025 4050 8100 16200 32400 range 50-100mm 1 2 3 6 11 22 45 90 180 360 720 1440 2880 5760

>100mm 0 0 1 1 2 4 8 16 32 64 128 256 512 1024 maximum >5mm 152 304 609 1217 2432 4864 9731 19462 38924 77849 155698 311396 622792 1245584 particles >15mm 27 54 109 217 432 864 1731 3462 6924 13849 27698 55396 110792 221584

ISO:DIS 4406; SAE J1165

iso solid contaminant code 8/5 9/6 10/7 11/8 12/9 13/10 14/11 15/12 16/13 17/14 18/15 19/16 20/17 21/18 22/19 maximum >5mm 250 500 1000 2000 4000 8000 16000 32000 64000 130000 250000 500000 1000000 2000000 4000000 particles >15mm 32 64 130 250 500 1000 2000 4000 8000 16000 32000 64000 130000 250000 500000

NOTES: All measurements are for a 100 ml sample size.

It is essential to make certain that the case (pump housing) is as full of fluid as possi-ble and remains full during operation and at rest.

Always fill to the highest available point. Remove a plug or screw and allow the oil to escape through this point.

Recommended fill points:

Mounting orientation vertical, shaft up. D1 or D2 (drain) port in housing.

Vent DG2 port in mounting flange (new units) or one of the upper screws which attach the con-trol. See installation drawing.

Vertical, shaft down1) or horizontal drain ports to the side. D1 or D2 (drain) port in housing.

1)Vent DG (case gage) port in port block.

These hydraulic products are designed to give long dependable service when properly applied and their systems properly maintained. These general instructions apply to typ-ical systems. Specific instructions for particular equipment can be developed from them.

This pump is self-lubricating and preventative maintenance is limited to keeping sys-tem fluid clean by changing filters frequently. Keep all fittings and screws tight. Do not operate at pressures and speeds in excess of the recommended limit. If the pump does not operate properly, check the troubleshooting chart before attempting to over-haul the unit. Overhauling may be accomplished by referring to the disassembly, rework limits of wear parts, and assembly procedures.

•Read and understand the instruction manual. Identify components and their function.

•Visually inspect components and lines for possible damage.

•Check reservoir for cleanliness and drain and clean as required.

•Check fluid level and fill as required with filtered fluid at least as clean as that recom mended. Fill pump case with clean oil prior to starting.

•Check alignment of drive.

•Check oil cooler and activate it, if included in circuit.

•Reduce pressure settings of relief valve or compensator. Make sure accurate pressure readings can be made at appropriate places.

•If solenoids are included in system, check for actuation.

•Start pump drive first by jogging prime mover. Make sure pump and motor fill properly.

Caution: Ensure that the servo/replenish pump primes at startup. This is important on a newly installed application or one that allows the servo/replenish pump to lose its prime during shutdown. Failure to adequately prime can damage the main pump or the servo/replenish pump.

•Bleed system of air. Re-check fluid level.

•Cycle unloaded machine at low pressure and observe actuation (at low speed, if possible).

•Increase pressure settings gradually in steps. Check for leaks in all lines, especially pump and motor inlet lines.

•Make correct pressure adjustments.

•Gradually increase speed. Be alert for trouble as indicated by changes in sounds, sys-tem shocks and air in fluid.

•Equipment is operational.

FILLING CASE

SERVICE INFORMATION

MAINTENANCE

START UP PROCEDURES FOR

NEW INSTALLATIONS

Component problems and circuit problems are often interrelated. An improper circuit may operate with apparent success but will cause failure of a particular component within it. The component failure is the effect, not the cause of the problem.

This general guide is offered to help in locating and eliminating the cause of the problems by studying their effects.

effect of trouble possible cause fault which needs remedy noisy pump air in fluid leak in suction line low fluid level turbulent fluid return lines above fluid level gas leak from accumulator excessive pressure drop in the inlet line from a pressurized reservoir suction line strainer acting as air trap cavitation in fluid too cold pump or motor fluid too viscous rotating group fluid too heavy shaft speed too high suction line too small suction line collapsed suction strainer too small or too fine suction strainer too dirty operating altitude too high boost or replenishment pressure too low replenishment flow too small for dynamic conditions misaligned shaft faulty installation distortion in mounting axial interference faulty coupling excessive overhung loads mechanical fault piston and shoe looseness or failure in pump bearing failure incorrect port plate selection or index eroded or worn parts in the displacement control erosion on barrel air in fluid see above ports and port cavitation see above plate high wear in excessive loads reduce pressure settings pump & motor reduce speed contaminant improper filter maintenance particles in fluid filters too coarse introduction of dirty fluid to system reservoir openings improper reservoir breather improper line replacement improper fluid fluid too thin or thick for operating temperatures range breakdown of fluid with time/temperature/shear-ing effects incorrect additives in new fluid destruction of additive effectiveness with chemi-cal aging improper repair incorrect parts incorrect procedures, dimensions, finishes unwanted water condensation in fluid faulty breather/strainer heat exchanger leakage faulty clean-up practice water in make-up fluid

TROUBLE SHOOTING

TROUBLESHOOTING

effect of trouble possible cause fault which needs remedy pressure shocks cogging load mechanical considerations worn relief valve needed repairs worn compen- needed repairs sator slow response in replace or relocate check valves servo pressure increase pressure and check pressure drop too low to through servo filter maintain firm control excessive de- improve decompression control compression energy rates excessive line reduce line size or lengths capacitance eliminate hose (line volume, line stretch, accumulator effects) barrel blow-off re-check pump hold-down, rotating group, drain pressure heating of fluid excessive pump re-check case drain flow and repair as required or motor leak- fluid too thin age improper assembly, port timing relief valve set too low(compared to load or to compensator) instability caused by back pressure, worn parts compensator set too high (compared to relief) worn parts pump too large select smaller pump displacement for fluid needs heat exchanger water turned off or too little flow water too hot fan clogged or restricted efficiency reduced by mud or scale deposits intermittent hydraulic fluid flow reservoir too little fluid entrained air in fluid improper baffles insulating air blanket that prevents heat rejection heat pickup from adjacent equipment

(continued)

ASSEMBLY / DISASSEMBLY TOOLS

T4

T3

T1 T2

Replenishing and servo pump removal tool

Shaft seal installation tool - rear adapter

No longer used. Barrel H.D. adjustment tool

T2 Material - cold roll steel

UNIT DISASSEMBLY

The instructions contained in this section cover a complete teardown of the subject pump. Disassemble only as far as necessary to replace or repair any worn parts.

CAUTION: On 24 series units relax barrel holddown prior to removal of shaft seal or main shaft. Failure to follow this procedure may result in pump failure.

NOTE: The four main assembly bolts (1, Figure 9) are torqued to 450 lbs-ft., 610,2 Nm. These bolts should be loosened prior to removing unit for disassembly.

Position pump unit so that the valve block assembly (11/12, Figure 10) is on top.

A bench or similar suitable surface capable of supporting unit should be used.

Disassembly area should be clean.

See figure 10. Remove the eight hex. head cap screws (12) and lift the entire block assembly from the port block.

See figure 13. Remove the four hex. head cap screws (58) and four soc. hd. screws

(53) and lift the entire block assembly from the port block.

See figure 12. Remove plugs (20), (23) and pin (21). Remove the 8-32 nut from the bottom of block (1) to remove filter assembly (14). Do not remove the check valves (2).

Remove housing (8), o-ring (9), piston seal (10), o-ring (11), screw (6), nut (7), and acorn nut (45) as a unit.

Remove spring (12) and cone (13). Remove seat (5) and o-ring (4).

NOTE: Seat is made for hex. wrenching. Use 1/2” six point socket with 1/4” drive.

Remove plug (25) and replenishing relief valve (36).

Remove o-rings (37), (48) and (47). Remove four screws (43) and remove the retainer plate (42). Do not remove roll pins (46) unless replacements are needed.

Remove gasket (29) and seats (27) and (28). Remove poppets (30), (31) and springs (32), (33), (35) and retainer (34).

Inspect orifices (3) visually to insure they are open. Do not remove unless damage or clogging is apparent.

See figure 7. Remove the four screws (13) with nyltite washers (12) from the side cover (15) and remove the input control assembly.

NOTE: The nyltite washers must be replaced at assembly.

Remove the four screws (13) with nyltite washers (12) from the side cover (14).

Remove the two screws (11) and spacers (10) and remove the balance plate (9).

See figure 6. Remove the two screws (6) and remove the balance stem (7).

NOTE: P24/30S units will require removing the shuttle valve assembly and external vane pump assembly and tubing.

Removal of External Aux. Pump Shuttle Valve, Mounting Adapter and Internal Aux. Pump See figure 10. Remove tubing between external pump and main pump.

Remove two screws holding pump. Remove pump from rear drive mounting pad.

Remove four screws holding shuttle (19) in place. Remove shuttle block.

Remove four screws (18) attaching shuttle adapter (17) and remove adapter and o-rings (15) & (16).

Remove six screws (7) and mounting adapter (6), coupling (14), and gasket (22).

On non-rear drive units. Remove plug (9) and o-ring (8).

Remove eight screws (7), and end cover (6), two tetraseals (5) and o-rings (4) and (3).

Remove auxiliary pump assembly (2).

INTRODUCTION

DISASSEMBLY

VALVE BLOCK

(after 7-93)

CONTROL COVERS

SERVO/REPLENISH PUMP

AND BARREL HOLDDOWN

NOTE: This is a complete vane cartridge assembly and removed in one step. A puller tool T3 is recommended.

Remove sealing washer (1).

See figure 4. Remove holddown lock retainer ring (8). (Use internal snap ring pliers.)

See figure 9. Remove four screws (1) and two screws (8). NOTE: There is a preload from the barrel holddown which will lift the port block approximately 1/8” (3.2mm) at release.

Carefully lift and remove port block (2) and port plate (4). CAUTION: The port plate may cling to the barrel face because of oil film. Do not allow the port plate to fall and become damaged.

See figure 6. Remove the face plate (2) and face plate pins (1) from the face of the barrel assembly.

See figure 4. Remove holddown adjusting screw lock (7), use an 18” blade type screwdriver, with the blade ground down to clear holddown shaft.

See figure 7. Lock main shaft from turning.

See figure 4. Use special tool T2, slip over auxiliary shaft (2) and engage dowels into holddown adjusting screw (6). Loosen load but do not remove.

See figure 6. Remove two bolts (5) holding housing and flange together.

See figure 3. Push tubes (4) out of housing slots and toward barrel, do not bend or damage them.

See figure 6. Lift housing (4) over tubes and barrel assembly and remove. Mounting flange must be driven from housing due to tight fit.

NOTE: Do not damage gasket faces in this process. Do not remove the retaining screws or bearing from the housing unless bearing is damaged and replacement is necessary.

Barrel assembly can be removed by lifting with auxiliary shaft. The pistons will remain with the cam assembly. These parts are precision finished and must be handled with extreme care!

See figure 4. Using special tool T2, holddown assembly can be removed from barrel.

Remove adjusting screw, (6), spring (5), retainer (4), spherical seat (3) and auxiliary shaft (2).

See figure 9. Remove four screws (1) and two screws (8). NOTE: There is a preload from the barrel holddown which will lift the port block approximately 1/8” (3.2mm) at release.

Carefully lift and remove port block (2) and port plate (4).

CAUTION: The port plate may cling to the barrel face because of oil film. Do not allow the port plate to fall and become damaged.

See figure 6. Remove the face plate (2) and face plate pins (1) from the face of the barrel assembly.

See figure 4.1. Loosen six screws gradually in alternating sequence.

CAUTION: Holddown is under preload. Do not remove screws completely.

Insert three #10-32 screws into the three #10-32 threaded holes. Alternately turn in screws till the tapered retainer releases. A loud crack sound should be heard when it releases.

See figure 7. Lock main shaft from turning.

See figure 4.1. Use special tool T2, slip it over auxiliary shaft (2) and engage dowels into barrel holddown nut assy. (5). Loosen load but do not remove.

See figure 6. Remove two bolts (5) holding housing and flange together.

SERVO/REPLENISH PUMP

AND BARREL HOLDDOWN

(continued)

(24 series barrel holddown)

(30 series barrel holddown)

See figure 3. Push tubes (4) out of housing slots and toward barrel, do not bend or damage them.

See figure 6. Lift housing (4) over tubes and barrel assembly and remove. Mounting flange must be driven from the housing due to tight fit.

NOTE: Do not damage gasket faces in this process. Do not remove the retaining screws or bearing from the housing unless bearing is damaged and replacement is necessary.

Barrel assembly can be removed by lifting with auxiliary shaft. The pistons will remain with the cam assembly. These parts are precision finished and must be handled with extreme care!

See figure 8. Remove the check valve assemblies (7) from the port block.

Remove plugs (9) and (10).

Remove two screws (4), lockwashers (5), check rings (6) and clamps (3).

See figure 7. NOTE: Pump cam must be on center 0° angle before removing shaft.

Remove four screws (5), seal retainer (2), gaskets (4), and stationary part of shaft seal assembly (3). Refer to view of item (3).

Remove the carbon ring and the remainder of the shaft seal from the shaft.

Remove shaft and bearing assembly (1).

See figure 3. Remove pressure feed tubes (4) from the cradle. DO NOT BEND THESE LINES. Discard all bent lines.

Remove the rocker cam assembly from the mounting flange by carefully tilting mount-ing flange on its side and using a 1/4-20 threaded rod as a puller, remove plugs (11) with o-rings (8), and then remove screws (9) attaching cradle to mounting flange.

Position rocker cam assembly on a clean surface with the override tubes (2) in a horizontal position and located at the top.

See figure 2. Mark the cam (21) and cradle (18) as indicated. These marks will determine positioning of parts during assembly.

Position the assembly in an upright position on the flat surface of the cradle.

Remove the retaining ring (1), thrust washer (2), piston and shoe assembly (4) and creep plate (5) from the rocker cam (21).

Remove the four screws (11) and four screws (12) from the control chamber covers (13R) and (13L).

Remove the control chambers (14). Remove the seals (17), four steel balls (16) and dowel pins (15).

Remove the screw (3), vane seal cartridges (23), holddown vanes (22) from the rocker cam (21).

Remove the rocker cam from the cradle (18).

wear part max. rework from min. dimension original dimension after rework port plate face 0.010”, 0.254 mm 0.735”, 18.67 mm shoe retainer face 0.005”, 0.127 mm 0.494”, 12.55 mm 1)piston shoe face, pocket 0.010”, 0.254 mm 0.010”, 0.254 mm creep plate face 0.010”, 0.524 mm 0.365”, 9.27 mm face plate none replace 1)No rework allowed on 30 in.3 piston shoe face.

(30 series barrel holddown continued)

PORT BLOCK

DRIVE SHAFT

ROCKER CAM AND CONTROL

STROKING ASSEMBLY

REWORK LIMITS OF WEAR

PARTS

IMPORTANT:

The port plate finish must be 8 microinches, .0203 micrometer both faces, flat within 0.00006”, 0,0015 mm and parallel within 0.001”, 0,0254 mm total indicator reading.

The creep plate wear face finish must be 5 microinches, .0127 micrometer, flat within 0.0005”, 0,0127 mm and parallel to the backside within 0.001”, 0,0254 mm total indica-tor reading.

The shoe retainer wear face finish must be 32 microinches, .0813 micrometer and flat within 0.0005”, 0,0127 mm. Must not be convex.

The piston shoes wear face finish must be 30 microinches, .0762 micrometer and must be lapped in a set with the retainer plate, all shoe sole thicknesses to be within 0.001”, 0,0254 mm after lapping. The maximum permissible shoe and piston axial looseness is 0.010”, 0,254 mm.

The special retaining ring service kit S23-12629 may be required to control shoe holddown clearance.

REWORK LIMITS OF WEAR

PARTS

ASSEMBLY PROCEDURE

All parts must be inspected and be free of material defects, dirt, scratches or any foreign material.

All parts must be cleaned with a suitable cleaning solvent and all holes and passages blown out with dry, clean, compressed air.

After cleaning and inspection, all parts must be covered with a light film of oil and pro-tected from dirt and moisture. Excessive handling of internal parts should be avoided prior to assembly.

During assembly, lapped and ground surfaces must be lubricated with clean oil and protected from nicks or surface damage.

See figure 1. Slide the bearing (2) over the short end of the shaft and seat against the shoulder. Support only the inner race of the bearing and press on the long end of the shaft, to install bearing.

Do not use excessive force. Use extreme care passing the ring over the seal surface.

Install the retaining ring (3) in the groove. Be sure that the ring is fully seated.

PARTS LIST FOR FIGURE 1

S23-12474 DRIVE SHAFT #3 ASSEMBLY SPLINED

S23-12475 DRIVE SHAFT #2 ASSEMBLY KEYED

quantity item description part no. #3 #2

1 #3 spline shaft 033-91139 1 - #2 keyed shaft 033-91140 - 1

2 shaft bearing 230-82213 1 1 3 retaining ring 033-71712 1 1 4 square key 033-71910 - 1

CLEANING AND INSPECTION

DRIVE SHAFT AND BEARING

ASSEMBLY

ROCKER CAM, PISTONS-SHOES &

RETAINER

#3 SHAFT #2 SHAFT

FIGURE 1

FIGURE 2

S23-12478 is for RH CW rotation pumps with “B” suffix input control on right side.1)

S23-12479 is for LH CCW rotation pumps with “B” suffix input control on right side.1)

S23-12476 is for RH CW rotation pumps with “A” suffix input control on left side.1)

S23-12477 is for LH CCW rotation pumps with “A” suffix input control on right side.1)

1)Viewed from shaft end of pump with valve block on top 12 o’clock position.1)

PARTS LIST FOR FIGURE 2

item description part no. quantity

1 retaining ring-use only one 1 .089-.087”, 2,261-2,210mm thick with yellow dot 033-71716 .087-.085”, 2,270-2,159mm thick with green dot 033-71717 .085-.083”, 2,159-2,108mm thick with white dot 033-91130 .083-.081”, 2,108-2,057mm thick with red dot 033-71718 .081-.079”, 2,057-2,007mm thick with blue dot 033-59746 retaining ring service kit S23-12629

2 thrust washer 033-59805 1 3 socket head cap screw 359-13160 2 4 retainer-piston-shoe assy. P24 S13-44470 1 retainer-piston-shoe assy. P30 S23-12684 5 creep plate 033-91653 1 6 servo stem 033-71773 1 7 orifice screw 033-70819 2 8 button head cap screw 353-25023 2 9 socket head cap screw 358-10120 2 10 servo plate 033-53874 1 11 hex. head cap screw 1/2-13 306-40174 4 12 hex. head cap screw 3/8-16 306-40035 4

13R right side chamber cover CW 033-71598 1 right side chamber cover CCW 033-71595 1

13L left side chamber cover CW 033-71597 1 left side chamber cover CCW 033-71593 1

14 control chamber 033-71757 2 15 dowel pin 324-22428 4 16 steel ball 201-06001 4 17 control chamber seal 606-25045 2 18 rocker cradle 033-91141 1 19 o-ring 691-00905 2 20 hexagon socket plug 488-35020 2 21 rocker cam S23-12482 1 22 holddown vane 033-70816 4 23 vane seal cartridge see below 2

23a vane seal backup plate 033-71726 4 23b vane seal 033-71714 2 23c o-ring 691-00128 2 23d vane spacer 033-71727 2 23e spacer 2

.2500-.2495”, 6,35-6,337 mm blue 033-59806

.2515-.2510”, 6,39-6,36 mm yellow 033-59983

.2530-.2525” 6,43-6,41 mm green 033-59984 24 override tube P24 033-71731 2 override tube P30 033-57933 2 25 hex. socket set screw 312-09032 2

ASSEMBLY PROCEDURE

CAM-CRADLE ASSEMBLIES

items 6 through (less item 24) 25, figure 2

ROCKER CAM, PISTONS-SHOES &

RETAINER

See figure 2. Position the cradle (18) on a clean surface with the large flat side down.

Lightly oil curved surface of cradle. Position rocker cam (21) on the cradle, aligning match marks made during disassembly.

Place o-ring (23c) on vane spacer (23d) and insert in the vane seal (23b).

Select spacer (23e) such that when installed in cam ear slot there is .0000-.0015”, 000-,038 mm total clearance between spacer and slot face. There are three different spacers available for this tolerance. Each spacer is marked: 0.2500-0.2495”, 6.35- 6,337 mm color blue; 0.2515-0.2510”, 6,39-6,36 mm color yellow; 0.2530-0.2525”, 6,43-6,41 mm color green.

Install assembled vane seal cartridge in slotted boss on side of rocker cam as indicated. Use a soft mallet and lightly tap assembly in position after rocker cam is positioned in rocker cam.

Install socket head cap screw (3) into cam ear and through vane assembly. Torque to 30 lbs-ft., 40,7 Nm.

Install the four nylon holddown vanes (22) in the slots on each side of the vane seal cartridges (23).

Position both control chambers (14) on a clean surface with seal grooves facing up.

Insert one steel ball (16) in each of the counterbored holes at the end of each of the seal grooves. Coin ball in seat.

Install seals (17) in grooves of the control chambers.

NOTE: The tapered side of the seals must be pushed into the grooves and the ends must cover the steel balls.

Install the assembled control chambers (14) over the seal cartridges by rotating the chambers until they slip over the vane seal cartridges, then rotate in the opposite direction until the 3/8” dowel pin holes in the chambers align with the dowel pin holes in the rocker cradle (18). Install dowel pins (15) through the control chambers and into the cradle.

Install chamber covers (13R) and (13L) on the control chambers (14). The covers must be installed with the override tube (24) holes at the top. Note the marks made during disassembly to indicate the top of the rocker cam and cradle.

NOTE: Two sets of control chamber covers are available. The set marked CW must be installed in the right hand rotation pump and the set marked CCW must be installed in the left hand rotation pump. Rotation is determined from the shaft end of the unit.

Install two 1/2-13 hex. head cap screws (11) in each side. Torque to 75 lbs-ft., 101,75 Nm.

Install two 3/8-16 hex. head cap screws (12) in each side. Torque to 30 lbs-ft., 40,7 Nm.

Install o-ring (19) and hex. socket plug (20) in each chamber cover.

Install override tubes (24) in holes in each cover. These tubes must be a tight fit. If tubes are loose, the ends may be expanded with a tapered punch. Tap the tubes in place with a plastic mallet.

Thread two orifice plugs (7) into servo stem (6).

Determine the proper location of the servo plate and stem. Looking at the projecting center post of the rocker cam with the override tube holes at the top, locate “A” mount-ed servo plate on right hand side or “B” on the left hand side.

Thread two size #10-24 socket head cap screws (9) thru the servo stem and into the rocker cam (21). Torque to 70 lbs-in., 7,9 Nm.

ASSEMBLY PROCEDURE

ROCKER CAM ASSEMBLY

Install servo plate (10) to stem (6) with two #10-24 button head screws (8). Torque to 30 lbs-in., 3,4 Nm. Install two set screws (25) in servo plate. Torque to 25 lbs-in., 2,8 Nm.

NOTE: The balance plate cannot be assembled to the rocker cam until after the housing assembly installation has been completed See figure 7.

Install creep plate (5) over center post on rocker (21).

Insert piston and shoes into retainer and install entire assembly (4) against creep plate.

Install thrust washer (2) over center post of cam and against shoe retainer. Grooved side of washer must face shoe retainer.

Install the thickest retaining ring (1) that will fit in the groove on the rocker cam center post which will allow a maximum clearance of 0.002-0.005”, 0,05-0,13 mm between the creep plate and shoe faces. To check this clearance, grasp one piston and lift until tight against shoe retainer. Insert thickness gage. If this clearance is not correct, select the appropriate retaining ring and repeat the checking procedure.

NOTE: If metallic thickness gage is used, caution should be exercised not to scratch shoe face. There are five different retaining rings available for this tolerance. Each retaining ring is marked: 0.081-0.079”, 2,03-1,98 mm thick blue dot; 0.083-0.081”, 2,08-2,05 mm thick red dot; 0.085-0.083”, 2,159-2,108 mm thick white dot; 0.087- 0.085”, 2,18-2,16 mm thick green dot; and 0.089-0.087”, 2,4-2,21 mm thick yellow dot. The piston and shoe assembly must be free to rotate 3600 by hand.

See figure 3. Install two elbow fittings (3) into the threaded holes in the cradle.

NOTE: Check the feed tubes (4) and override tubes (2) by fitting them into the correct port block holes before assembling to the stroking assembly (5). They must be a snug push fit as they rely on a metal to metal seal to contain system pressure. If they fit loose or are damaged they must be replaced.

Install pressure feed tubes (4) to elbow fittings (3). Tighten the connectors until snug.

Position the mounting flange (7) with the large open end facing up and install two dowel pins (6) in the cradle mounting surface and one 3/8”, 9,5mm diameter dowel pin

(10) in the outer edge of the flange.

Install the rocker cam and cradle assembly (5) over the dowel pins (6) in the mounting flange.

NOTE: Pressure feed tubes to be on the same side of mounting flange centerline as the 3/8”, 9,5 mm diameter dowel pin (10).

With cam and cradle installed, tilt mounting flange on its side and secure with two soc.

hd. cap screws (9). Torque to 50 lbs-ft, 67,8 Nm.

Insert plugs (11) with o-rings (8) into soc. hd. cap screw (9) c’bores. Be sure tapped hole in plug (11) is visible after installation. This is used for removal.

Install plugs (12) with o-rings (13).

Install shaft assembly See figure 7. Install shaft and bearing assembly (1), either splined or keyed as speci-fied by inserting shaft through bores, a few light taps are required on the outer race to completely engage and seat bearing.

NOTE: Do not tap on end of shaft, but on the bearing outer race only.

ASSEMBLY PROCEDURE

FIGURE 3

Tapped hole this side.

CASE

OVERFILL

PORT

AIR

BLEED

PORT

ROCKER CAM ASSEMBLY

(continued)

PISTON AND SHOE ASSEMBLY

MOUNTING FLANGE,

CAM & CRADLE, BARREL &

AUXILIARY SHAFT ASSEMBLY

PARTS LIST FOR FIGURE 3

item description part no. quantity

1 barrel & aux. shaft assembly see fig.4 or 4.1 1 2 override tubes item 24 see fig. 2 2 3 male elbow 473-15041 2 4 tube assembly P24 S13-44469 2 tube assembly P30 S23-12172 2 5 rocker cam & stroking assy. see fig. 2 1 6 dowel pin 324-24028 2 7 mounting flange 033-91137 1 8 o-ring 671-00111 2 9 soc. hd. cap screw 358-16260 2 10 dowel pin 324-22416 1 11 plug 033-57475 2 12 plug 488-35061 3 13 o-ring 691-00904 3

Return the mounting flange to an upright position and tilt the rocker cam to either extreme attitude on the cradle.

Position the barrel assembly (1) directly over the pistons. Starting with the uppermost piston, guide them one at time into the barrel bores.

NOTE: Support the barrel on the main shaft but tilted slightly so as not to allow the barrel to drop and fully engage the barrel and shaft splines. Now the holddown assem-bly can be installed without any load against it.

See figure 4. Install auxiliary shaft (2) large spline end first into counterbore in face of barrel spline.

Install spherical seat (3) round or spherical face up into counterbore in face of barrel.

Install spring retainer (4) socket side down into counterbore, install spring (5) and seat against spring retainer.

Thread holddown adjusting screw (6) into counterbore approximately four threads.

Tilt barrel vertically and engage main shaft spline with the barrel spline allowing barrel to drop in place.

Thread holddown adjusting screw (6) into counterbore until it is flush to 0.060”, 1.52 mm maximum below barrel face.

PARTS LIST FOR FIGURE 4 (P24)

quantity item description part no. P24 1 barrel & sleeve assembly S23-12091 1 2 auxiliary drive shaft 033-57257 1

(no through drive)

3 spherical seat 033-57147 2 4 spring retainer 033-57138 1 5 spring 033-57136 1 6 holddown adjusting screw 033-57139 1 7 holddown adj. screw lock 033-57241 1

8 holddown lock retaining ring 033-57239 1

MOUNTING FLANGE,

CAM & CRADLE, BARREL &

AUXILIARY SHAFT ASSEMBLY

(continued)

BARREL AND AUXILIARY

DRIVE SHAFT 24 SERIES

FIGURE 4

(through drive) SAE-BB=S23-17448-

SAE-C=S23-17446-

SAE-D=S23-17450-

auxiliary drive shaft &coupling SAE-B=S23-17444- 0 K 1 0K 1 0K

See figure 4.1. Install auxiliary shaft (2) large spline end first into counterbore in face of barrel and engage barrel spline.

Slide holddown spring assembly (3) onto shaft (2). Install spring retainer (4) into counterbore.

Thread holddown screw assembly (5) into barrel’s counterbore approximately four threads.

Tilt barrel vertically and engage main shaft spline with the barrel spline allowing barrel to drop in place.

Thread holddown screw assembly (5) into counterbore until it is .25 in., 6,35 mm below barrel face.

PARTS LIST FOR FIGURE 4.1 (P30)

quantity quantity item description part no. P30P P30S 1 barrel & sleeve assembly S23-12170 1 1 2 auxiliary drive shaft 033-91188 1 1

(no through drive) auxiliary drive shaft &coupling (through drive)

3 holddown spring 035-71713 6 6 4 spring retainer 033-91138 1 1 5 barrel holddown nut assembly S23-12171 1 1

See figure 5 Clean housing (1) and position on a flat surface with the large open end up.

Apply LoctiteÒprimer grade “T” & Loctite retaining compound #609 per A.P. 01433 to bearing O.D. & bearing bore of housing. Immediately align & press bearing into hous-ing bore with a smooth steady force until seated. Install socket head cap screw (3) with washer (7). Typical two places. Torque to 30 lbs-ft., 40,8 Nm.

Install two dowel pins (4) in the blind holes in the control cover pads. Repeat step above on the opposite side of the housing.

Install o-ring (5) and plug (6) in the bottom of housing.

PARTS LIST FOR FIGURE 5

item description part no. quantity

1 housing 24 033-57150 1 housing 30 033-57925

2 bearing 033-91150 1 3 screw soc. hd. cap 358-14106 2

5/16-18 x 5/8 w/nylok 4 dowel pin 324-21608 4 5 o-ring 691-00920 1 6 plug 488-35019 1 7 washer 11/32, 8,73 mm steel 345-10020 2

ASSEMBLY PROCEDURE

BARREL AND AUXILIARY

DRIVE SHAFT 30 SERIES

FIGURE 4.1

HOUSING ASSEMBLY

Figure 5

SAE-B=S23-17445-

SAE-BB=S23-17449-

SAE-C=S23-17447-

SAE-D=S23-17451-

1 1 1 1

0K 0K

See figure 6. Install new gasket (3) over the dowel pin in the mounting flange. Do not use gasket compound.

Insert two socket hd. cap screws (6) through holes in balance stem (7). Attach balance stem to stroking control assembly. Torque to 70 lbs-in., 6,6 Nm.

Install the housing assembly (4) over the barrel and auxiliary shaft assembly. Carefully guide the override tubes and pressure feed tubes items 2 and 4, figure 3 through the housing assembly. Position the pressure feed tubes in the slots in the housing face.

NOTE: Lightly force the pressure feed tubes downward toward the stroking assembly do not bend or crimp the tubes enough so that they must be pulled up a little to snap into the housing slots. This will hold them in position for assembling the port block to the housing.

Insert two hex. hd. cap screws (5) through mounting flange and into housing. Torque to 100 lbs-ft., 135,6 Nm. These must be fully torqued later when main bolts are in place.

Install face plate pins (1) in the holes provided in the barrel face.

Apply clean heavy grease to the surface of the barrel and install the face plate (2) over the face plate pins. The surfaces must be absolutely free of scratches, dust or dirt to prevent excessive leakage. Lubricate pistons with clean system fluid through the holes in the face plate.

CAUTION: The face plate has a black break-in coating on top of bronze which is bond-ed to a steel backing. Lightly sand the edge of the plate to identify the bronze coated side. The bronze side should go toward the port plate.

PARTS LIST FOR FIGURE 6

item description part no. quantity

1 face plate pins 033-59747 3 2 barrel face plate P24 033-71748 1 barrel face plate P30 033-57571 3 housing gasket 033-91082 1 4 housing assembly see fig. 5 1 5 hex. hd. screws 306-40009 2 6 soc. hd. cap screws 358-10120 2 7 balance stem 033-71774 1

CAUTION: When installing a new mechanical shaft seal, exercise care to insure that all of the parts fit together properly. This is particularly important if the seal was once assembled and disassembled for some reason. If the rubber boot, item 4, grips the shaft and does not slide on the shaft, as it is disassembled, then the spring, item 7, can disengage the shell, item 5, from the band, item 6, so that they do not re-engage properly when reassembled. Be sure the shell and the band are properly engaged before reassembling the seal, and stays engaged during assembly.

NOTE: Re-using shaft seal is not recommended practice.

NOTE: Lubricate seal and shaft with clean hydraulic fluid of the same type that will be used in the system.

ASSEMBLY PROCEDURE

HOUSING, END CAP, CAM AND

BARREL ASSEMBLY

MECHANICAL SHAFT SEAL

ASSEMBLY PROCEDURE

FIGURE 6

SEAL ASSEMBLY

SEAL ASSEMBLY

FIGURE 7

See figure 7.

NOTE: 24 series only - to replace shaft seal only:

Remove unit for disassembly.

Some units require removing an adapter housing and external pump.

Follow steps removing the internal auxiliary pump and seal plate see figure 10.

Remove retaining ring (8), figure 4.

Remove shaft seal. Follow seal assembly in reverse order.

Assemble new shaft seal per instructions below.

After seal is replaced re-install retaining ring (8), figure 4 and reassemble auxiliary pump and unit per assembly instructions.

CAUTION: Failure to follow these instructions may result in pump failure.

Procedure for installation of Mechanical Shaft Seals Use only clean hydraulic fluid from the test stand or system to lubricate the seal. The fluid must be compatible with the type of seals being installed. Ensure that your hands are clean at all times when installing seals.

Install the shaft into the unit per procedure.

Assure that the seal faces of the stator and carbon ring remain clean throughout the installation. These parts have highly polished finishes which must be maintained to seal properly.

Lubricate the seal ring on the outside of the seal stator (ceramic) and install into seal retainer. Inspect the back of the retainer to assure that the seal ring and stator are installed completely and squarely into the retainer and the stator is not tipped. Care must be taken to assure that the stator is not damaged. Avoid any impact on this piece.

Install o-rings into grooves on the seal retainer as required.

Lubricate the shaft in the seal area, the ID of the Rubber boot, the face of the stator and the face of the carbon ring. Without touching the face of the carbon seat, slip the assembled spring and rubber boot onto the shaft until the spring retainer bottoms out. Align the seal retainer and mounting flange bolt holes and push this assembly down with the seal stator face against the carbon face until the seal retainer is in the mounting flange pilot, taking care to keep the parts as even as possible. Secure (Do not use impact tool) with 4 screws and torque to required specification.

Allow the unit to sit for a minimum of one hour before running to allow time for the seal friction ring to adhere to the shaft.

PARTS LIST FOR FIGURE 7

1 No. 3 splined shaft assy. S23-12474 1 see figure 1 No. 2 keyed shaft assy. S23-12475 see figure 1

2 seal retainer 033-57472 1 3 shaft seal 623-00015 1 4 seal retainer o-ring 671-00246 1 5 hex. head screw 306-40123 4 6 not used 7 not used 8 not used 9 balance plate 033-70546 2 10 spacer 033-71247 2 11 soc. hd. cap screw 359-09180 2 12 NyltiteÒ washer 631-45007 8 13 hex. hd. washer screw 353-25018 8 14 control assy. output see below 1 15 control assy. input see below 1 16 Not used 17 Not used 18 Gasket 033-91058 1

See figure 7. Place the two spacers (10) on the screws (11) and install through the balance plate (9).

Align screws with the threaded holes in balance stem and tighten. Torque to 70 lbs-in., 6,6 Nm.

Replace servo plate that was removed, refer to servo assembly page17 to servo stem.

Install gaskets (18) on…