Item 11 r-lbuff.doc

RIGHT OR LEFT BUFFERED MOLDBOARD PLOW WITH WING

AND ALL SUPPORTING EQUIPMENT (HIGH TOWER)

Item 11

RIGHT OR LEFT BUFFERED MOLDBOARD PLOW WITH WING

AND ALL SUPPORTING EQUIPMENT (HIGH TOWER)

1. HITCH

_____ 1.1 Custom side plate model designed, constructed and installed for extreme service.

_____ 1.2 Quick detachable and pivoting for access to engine compartment, utilizing plow ram and 1 1/4” pins. There shall be three (3) plow pinning heights located at 15.5”, 18” and 20.5” heights on 31” centers. It shall be readily removable for summer storage leaving the hydraulic pump mounted to the chassis.

_____ 1.3 Shall be minimum 5/8” steel construction.

_____ 1.4 Integral heavy duty upper and lower horizontals for right and/or left wing tower of HSS 6”x4”x3/8” minimum steel tube.

_____ 1.5 Shall be designed, constructed to accommodate interchangeability of various plows and plow frames in use by Fleet Services, Maine Department of Transportation.

_____ 1.6 Shall accommodate installation of engine crankshaft driven pump or PTO assembly.

_____ 1.7 Shall be designed, constructed and installed to keep the effects of weight and leverage of plow and plow frame to an absolute minimum and transmit plow forces directly to the truck frame side rails.

_____ 1.8 Plow ram must be 4" diameter x 14” stroke with a 1 3/4” diameter double nitrided piston, rod providing 20.75” lift minimum.

_____ 1.9 The support frame shall be adjustable in height during installation to accommodate varying frame heights and chassis frames.

_____ 1.10 The front mast shall be constructed of two 4”x4”x1/2” angle vertical members reinforced with a 4”x4”x1/2” horizontal top angle, a 4”X4”X1/2” cylinder base angle and a 3”x2”x1/4” base tube.

_____ 1.11 There shall be a 1/2” thick upper cheek plate bolted to the front frame ends to carry the vertical loading. There will also be a 1/2”x24” frame rail reinforcement bolted to the frame above the front axle.

_____ 1.12 The lift arm shall be fabricated from 1” flame cut plate, braced with two 1/2”x2” steel flat bar plates. The lift arm shall have a triple point chain hook allowing either single or double chaining.

_____ 1.13 The hitch shall be mounted at not more than 18” measured from truck grill to plow attach hole center.

_____ 1.14 The base bracket and hitch frame mounting pin holes must be reinforced internally and externally by a HSS steel washer 3/8” thick welded as a boss to prevent elongation of the pin mounting holes due to vibration.

_____ 1.15 A suitable rubber block must be installed between the base bracket and hitch frame to provide tension on the mounting pins which is intended to reduce or stop vibration.

_____ 1.16 Two adjustable turn buckles must be provided to secure detached hitch portion to the front plow, which will allow for stand alone storage.

_____ 1.17 Two side winding screw adjustable parking legs (jacks) mounted on each end of hitch cross tube to allow for hitch assembly removal (minimum 1,000 lb capacity).

2. PLOW FRAME AND RIGHT OR LEFT HAND HIGH SPEED PLOW

_____ 2.1 Intake height 26" minimum; discharge height 54" minimum measured at top of curvature. Minimum circumference excluding moldboard backer angle must be 54 1/4” on the intake end and 89 1/2” on the discharge end.

_____ 2.2 Length of cutting edge shall be 11’, cleared path 9' minimum @35 degrees plowing angle. The overall length shall be 164”.

_____ 2.3 Designed and constructed for extreme service.

_____ 2.4 The moldboard shall be a one piece ten gauge construction, brake formed for additional rigidity. It shall be high speed curvature to eliminate blow-back.

_____ 2.5 There shall be 29” of overhang, at a 60 degree attack angle, measured at the discharge end of the high speed curvature plow.

_____ 2.6 The top edge of the moldboard shall be reinforced with a HSS section of 3”x2 1/2”x1/4” angle iron. The moldboard backer angle shall be 6”x4”x3/4” angle. The moldboard shall have eight 1/2” flame cut vertical support ribs.

_____ 2.7 AASHTO standard punching with carbide cutting edges.

_____ 2.8 Intake to have end plate of 3/8" minimum.

_____ 2.9 Attack angle of cutting edge must be easily adjustable from 45o through and including 60o by means of a tubular telescoping bar.

_____ 2.10 There shall be two moldboard shoes and one nose shoe.

_____ 2.11 Trip mechanism shall be of the trip moldboard buffer style.

_____ 2.12 The trip mechanism shall be a buffer type incorporating two radially mounted compression springs. The springs shall be wound from .703” wire to a 4.07 ID” diameter with a spring rating of 422 and shall have a minimum of nine active coils. These springs shall be retained by adjustable Nylok nut and plate washer. The retaining rod shall be C-1045 steel rod of 1 1/2” diameter. The rod shall have a safety retainer pin located at the end of the thread which prohibits the nut from backing off of the rod.

_____ 2.13 The main drive tubes of the push frame shall be a minimum of 5”x5”x1/4” tubing. The lateral drive angle must be a minimum of 6”x6”x3/4” angle which is boxed with 1/2” steel plate.

_____ 2.14 The drive angle shall have two connecting places to attach moldboard assembly with a center roller included.

_____ 2.15 The oscillating push bar shall be flame cut from 1” steel and have a pivot bolt of 1 1/4” diameter grade five bolt with self locking nut.

_____ 2.16 Due to the buffer trip design, the push frame shall be supplied with adjustable frame shoes with 96” of bearing surface and a brinnell hardness of 37 minimum each.

_____ 2.17 Side winding screw adjustable leg (jack) positioned to support and balance plow when removed (minimum 1,000 lb capacity).

3. RIGHT OR LEFT HAND WING PLOW

_____ 3.1 Appropriate model for either 32,000 GVW or 54,000 GVW vehicle whichever is required.

_____ 3.2 Heavy duty model.

_____ 3.3 Overall blade length 10’ on 32,000 GVW vehicle or 11’ on 54,000 GVW vehicle. The overall wing length shall be 11’ on the 32,000 GVW vehicle and 12’ on the 54,000 GVW vehicle.

_____ 3.4 Minimum ten gauge moldboard. The moldboard shall be fabricated with a 1” nose plate. The moldboard shall be supported by four 1/2” flame cut ribs. The top of the moldboard shall be supported by a 3”x3”x1/4” HSS tube with intermediate support of 1/2”x4” flat bar and two 1/2”x4”x4” angle arm bracket supports.

_____ 3.5 The backer angle will be 6”x4”x3/4” angle minimum gussetted with 3/8” triangular plate, AASHTO standard punching.

_____ 3.6 The wing shall include two mounting positions for a 1 1/2” pivot bolt. The pivot bolts shall be reinforced with a 1/2” plate washer welded to the skin plate.

_____ 3.7 The wing arm attachment bracket shall be bolted in place and adjustable in position. The arms shall be pinned with a 1” diameter grade eight plated hex cap screw secured with a Nylok hex nut.

_____ 3.8 The blade shall be 1/2” x8” C-1085 steel reversible cutting edge with coped corners on the intake end. There shall be two cast iron wear shoes bolted behind and through the base angle. The blade and shoes shall be secured with 5/8” grade five plated carriage bolts.

_____ 3.9 Attack angle of 85°.

_____ 3.10 Wing must be equipped with a removable safety chain at the nose of the plow.

4. RIGHT OR LEFT HAND SINGLE (HIGH TOWER)

_____ 4.1 Cable hydraulic operated heavy duty high towers.

_____ 4.2 The rear tower slide tray shall be a minimum of 12” structural channel @ 25 lbs./ft. vertical reinforced by two full height structural 4”x3”x1/2” angle. It shall also have one intermediate 1/2” plate brace. This 1/2” brace shall serve as the support member for the wing arm lift cylinder which will be located in the interior side of the rear tower.

_____ 4.3 The rear tower shall have an open section design.

_____ 4.4 The rear tower shall have a top mounted self aligning wire rope exit.

_____ 4.5 The slide control cylinder shall be exposed for ease of service.

_____ 4.6 Rear tower shall have bolted connections to the rear saddle to allow for various frame heights and off season removal without disturbing the hydraulic system. The tower shall be perpendicular to the truck chassis. All tower bracing that extends below the chassis rail must be removable.

_____ 4.7 The slide control cylinder shall be a 3 1/2” diameter bore x 42” stroke double acting with a double nitrided piston rod. Both oil ports will be on the base end.

_____ 4.8 The wing control cylinder shall be a 4 1/2” diameter bore x 18” stroke single acting “ram” type double nitrided piston. There shall be triple sheave boxes welded to the base and rod end wire rope travel shall be six times stroke.

_____ 4.9 The slider shall be 3/4” plate with an integral cylinder cover, 3/4” thick double arm mounting ears carrying 1 1/4” diameter grade five plated bolts with Nylock nuts. It shall have 42” of vertical travel.

_____ 4.10 There shall be 6” nominal size sheaves on front and rear tower with extra deep rope grooves with a 1 1/4” diameter axle with greaseable brass bushings.

_____ 4.11 The front tower shall be of open section design.

_____ 4.12 It shall be constructed of 8” @ 18.4 lbs./ft. structural I-beam slide tray. The lift cylinder shall be located behind the tower, rod end down. Shelving shall be achieved by a singe wire rope sheave on the cylinder rod end and a single sheave on the tower top.

_____ 4.13 The slide travel shall be twice the cylinder stroke. The slider shall be retained by two 3/4” structural square bars. At no point shall any part of the tower structure extend above the tower at any point of slider travel.

_____ 4.14 The front tower shall have a lower skid shoe. It also shall have bolted connections to the support tubes.

_____ 4.15 Wing shall have a lift capacity of 72” minimum. It will be achieved by a 3” bore by 36” stroke double nitrided cylinder with a 1 1/2” diameter double acting piston rod, minimum.

_____ 4.16 The rear saddle shall be laterally mounted HSS section of 6”x4”x1/2” wall thickness. There shall be 1/2” “L” shaped cheek plates with the tower end gussetted to form a box with the tower attach bracket. There shall be a minimum of two 3”x3”x3/8” angle braces to stabilize the tower base. (Must be detachable if located below frame rail).

_____ 4.17 Designed to be quick detachable including wing posts (and hydraulics) by the use of quick disconnecting fittings. (Fittings to be 1/2” diameter, Parker).

_____ 4.18 Trip mechanism and wing plow to be approved by Fleet Services/MaineDOT. The trip spring shall be a torsion type spring with a 1” diameter wire, minimum. Trip device shall be plumb.

_____ 4.19 The rear tower height shall be same as front tower height.

_____ 4.20 Cables that operate over sheaves must be adjusted so that at maximum stroke, cable clamps, etc., will not be pulled into the sheaves.

_____ 4.21 Push arms for 10’ wing plows must be 5’ minimum.

_____ 4.22 All cables must be minimum 1/2” diameter 8 by 19 construction, improved plow steel.

_____ 4.23 If possible the rear tower must be angled to provide a straighter alignment for push arms and push arm joints.

5. HYDRAULICS

_____ 5.1 Load sense pump - 4.33 CID, front mount and cast iron construction. The pump case drain must be plumbed directly to tank not through return filter. The load sense stand by pressure should be set at 325 PSI and be internally drained to allow a dynamic flow for the sense signal. Rexroth model A10V071 or pre approved equal.

_____ 5.1a. Additional hydraulically powered equipment a 6.1 CID load sense pump Rexroth model A10V100 must be substituted for hook lift system.

_____ 5.2 Spicer drive shaft #C9553-SF-NG with proper angle of installation.

_____ 5.3 Low oil safety circuit, consists of direct mount block valve, tank mounted float switch and system override. System shall automatically shut down at low oil level and be capable of also being manually shut off and locked out.

_____ 5.4 Directional Control Valve: Sauer Danfoss PVG32 or approved equal. The valve must be compensated, proportional and load independent.

_____ 5.5 Pressure and Flow: each valve must be settable with pressures up to 5,000 psi and the flow rating up to 35 gpm. Valve must be of laminar flow design for minimum pressure drop. Valve must have adjustable flow control on both sides of the spool.

_____ 5.6 Relief valves must include settable reliefs.

_____ 5.7 Electrically Activated Coils: all coils shall have actuation valve and must be able to be manually or electrically controlled. Electrical actuation must be controllable with a PWM signal for fully proportional or on/off operation from one coil. Separate coils not acceptable. Coil shall have Deutush female plugs located on the end of coil. Spools must have a heavier centering springs. Valve assembly must accommodate up to 13 work sections, valve must be available in either open or close center configurations.

_____ 5.8 Minimum 40 gallon oil reservoir capacity with pressurized filler breather.

_____ 5.9 The system will also utilize a full flow return line filter. This filter will have ten micron filtration and a 23 PSI bypass. Installation will allow for ease of servicing. Hycon model #MFBN160G10M1.0/12.2B3.1 filter shall be supplied.

_____ 5.10 All hydraulic valving for body, plows and spreader shall be in one central assembly. Multiple valve assemblies are unacceptable. All plow sections except the bed chain and spinner functions shall be cable operated. Installation will be done to state requirements and approved at prototype inspection.

_____ 5.11 Valves are to be mounted in a ten gauge weatherproof enclosure outside the frame rails. Enclosure must be designed, constructed and installed for easy, quick, complete accessibility and repair.

_____ 5.12 An in line high pressure filter will be mounted between the pump and main valve. A Hycon model #DFBN3HC160G10B1.1/12-B6YP shall be supplied with an extra element.

_____ 5.13 Spreader control system must be electrical and be easily and readily convertible to closed loop ground speed orientation by changing control head only.

_____ 5.14 Dual control levers mounted in cab. Quadco Model C-81 levers with Tuthill Corp. Cabelcraft Model 1846 MT92 stainless steel armored and sealed cables of appropriate length.

_____ 5.15 Spicer end yokes 2-4-533 and engine flange 2-2-479 series 1310.

_____ 5.16 Spicer series 1310 PTO shaft slip joint non greasable tubular driveline with non greasable u-joints C9533-SF-NG.

_____ 5.17 Parker 1/2” disconnect couplers shall be used on hydraulic lines to all quick detachable parts, including front hitch and wing posts. Parker hoses and fittings preferred.

_____ 5.18 Drive shaft and universals must be guarded and must be able to be easily serviced.

6. HYDRAULIC OIL TANK

_____ 6.1 It shall have a “shed roof” design of approximately 35o (and a floor of 1/4” plate steel).

_____ 6.2 Tank shall have sight gauge and electrical float switch to indicate proper oil level. (Hycon part #FSK 176.2.3.C/12 or approved equal).

_____ 6.3 The tank shall have a capacity of 40 US gallons with baffle, breather, Hycon sight gauge, magnetic drain plug and internal feed line screen with a bypass.

_____ 6.4 Hydraulic tank shall be fabricated utilizing minimum 7 gauge steel.

_____ 6.5 The Hycon sight gauge must be reversible from the left to right side of the tank.

_____ 6.6 Fill port cap will have an integral screen pressurized with a three PSI vent. Unit will be installed in such a manner to prevent entry of contaminants including snow and rain while either open or closed.

_____ 6.7 Suction outlet on the tank shall be protected by an internal screen of approximately 35 micron with an integral bypass in the tank.

_____ 6.8 Suction strainer must be externally removable for ease of replacement and servicing. (Buyers #SW3002003).

_____ 6.9 A full flow/2” shut off ball valve shall be mounted in the suction line. The return line will incorporate a full flow check valve mounted between the return line filter and Parker tank inlet or approved equal.

_____ 6.10 The tank shall be bolted to the rear saddle for ease of cleaning.

_____ 6.11 The tank must have a 2” threaded pipe opening located in such a position to easily install an electric oil heater. The internal oil baffle must not interfere with the heating element.

_____ 6.12 On trucks with hopper sanders, a suitable step of steel grating, approximately 14”x 16”, must be attached to the hydraulic tank shed roof.

7. GENERAL

_____ 7.1 All parts and components must be compatible with equipment currently in use by Fleet Services, Maine Department of Transportation.

_____ 7.2 Ten (10) parts and repair manuals as necessary.

_____ 7.3 All equipment shall be primed with 2 coats of rust proof lead free primer.

_____ 7.4 Finish coat of lead free Dupont 3.5 Imron High Gloss Plow Yellow.

_____ 7.5 All equipment must be thoroughly inspected, serviced and be ready for use upon delivery.

_____ 7.6 Plow lights must be of halogen type, low profile, professionally mounted and wired with a weather pack type plug-in device for quick disconnect mounted in the engine compartment (socket must not be mounted in or through hood).

_____ 7.7 All wiring must be protected by wire loom and be weatherproof, soldered connections and heat shrink wrap must be used on all wiring.

_____ 7.8 All wiring and hoses shall be mounted, routed and fastened in a professional manner to prevent chafing, rubbing, etc.

_____ 7.9 All hardware installed shall not obstruct any vehicle or equipment lubrication points.

_____ 7.10 All hardware installed shall not obstruct or interfere with any vehicle component or system.

_____ 7.11 Vehicle bumper must be quick attachable for summer use and attached to plow hitch with pins.

_____ 7.12 Main plow and plow wings must be capable of installation and/or removal easily by one person.

_____ 7.13 All plow hydraulic cylinders must be easily rebuildable.

_____ 7.14 Electrically controlled solenoids shall be equipped with manual overrides.

_____ 7.15 All hydraulic fittings to be NPT thread with Teflon tape, JIC not acceptable.

_____ 7.16 All cylinders must be double nitrided.

_____ 7.17 Solenoid operated plow valves must be capable of conversion to cable operation if necessary.

_____ 7.18 All feed and return lines must have shut off valves to isolate the hydraulic tank.

_____ 7.19 An emergency light mast of heavy wall steel pipe must be provided and securely fastened to the hydraulic tank. The mast must extend past the cab roof.

APP/kad 12/14/11 r-lbuff.doc

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