Torque Specifications_(SENR3130-12_.pdf

SENR3130-12

February 2009

Speci�cations Torque Speci�cations

SAFETY.CAT.COM

i01658146

Important Safety Information Most accidents that involve product operation, maintenance and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills and tools to perform these functions properly.

Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death.

Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information.

Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.

The hazards are identi�ed by the “Safety Alert Symbol” and followed by a “Signal Word” such as “DANGER”, “WARNING” or “CAUTION”. The Safety Alert “WARNING” label is shown below.

The meaning of this safety alert symbol is as follows:

Attention! Become Alert! Your Safety is Involved.

The message that appears under the warning explains the hazard and can be either written or pictorially presented.

Operations that may cause product damage are identi�ed by “NOTICE” labels on the product and in this publication.

Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.

The warnings in this publication and on the product are, therefore, not all inclusive. If a tool, procedure, work method or operating technique that is not speci�cally recommended by Caterpillar is used, you must satisfy yourself that it is safe for you and for others. You should also ensure that the product will not be damaged or be made unsafe by the operation, lubrication, maintenance or repair procedures that you choose.

The information, speci�cations, and illustrations in this publication are on the basis of information that was available at the time that the publication was written. The speci�cations, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete and most current information before you start any job. Caterpillar dealers have the most current information available.

When replacement parts are required for this product Caterpillar recommends using Caterpil-lar replacement parts or parts with equivalent speci�cations including, but not limited to, phys-ical dimensions, type, strength and material.

Failure to heed this warning can lead to prema-ture failures, product damage, personal injury or death.

SENR3130-12 3

Table of Contents

Table of Contents

Speci�cations Section

General Information Metric (ISO) Fasteners English (SAE) Fasteners Ground Engaging Tool (G.E.T.) Fasteners Installation of Fittings Straight Thread O-Ring Fittings Plugs O-Ring Face Seal Fittings Bulkhead Nuts Flare Fittings Air Conditioning Fittings Air Brake Fittings Tapered Pipe Thread Fittings Miscellaneous Fittings Hose Clamps

Index Section

Index

4 SENR3130-12

Speci�cations Section

Speci�cations Section i02357647

General Information SMCS Code: 7553

Mismatched or incorrect fasteners can result in damage or malfunction, or personal injury.

Take care to avoidmixing metric dimensioned fas-teners and inch dimensioned fasteners.

Introduction to Torque “Torque” is measured in terms of force and distance.

Force is the amount of pushing or pulling applied at the end of the lever. Distance is the length of the lever that is being used. Torque values are given in the following units: NEWTON meters (N·m), pound inches (lb in), and pound feet (lb ft)

This manual is intended to provide the operator with a reference. This manual will provide the standard torque settings for the following: bolts, nuts, plugs, �ttings, and clamps.

Exceptions to these torques are given in the Service Manual, if necessary.

Be sure to use a torque wrench that has the proper range. Torque wrenches must be used properly in order to ensure that the correct torque is applied.

Always use a smooth pull for torque wrenches.

Do not jerk a torque wrench. Do not use adapters that change the length of the torque wrench. For the correct use of your torque wrench, refer to the instructions that were packaged with your torque wrench. For more information on the correct use of torque wrenches, refer to Special Publication, SEBV0516, “An Introduction to Torque”.

Prior to installation of any hardware, ensure that components are in near new condition. Bolts and threads must not be worn or damaged. Threads must not have burrs or nicks. Hardware must be free of rust and corrosion. Clean reused fasteners with a noncorrosive cleaner. Lightly lubricate the threads of reused fasteners. Lightly lubricate the mating surface of the head of reused fasteners. Other applications for lubricating fasteners may also be speci�ed in the Service Manual. The Service Manual may also specify the use of sealants and compounds.

Note: Do not use sealants that are not speci�ed in the Service Manual. Do not use compounds that are not speci�ed in the Service Manual. Clean old compound from the bolt and from the hole before installation.

Torque-Turn The torque-turn method is used when precise control over clamping force is required. There is an initial torque and an additional turn. The initial torque is required to bring all parts of the joint into contact.

The additional turn provides the desired clamping force. Ensure that all fasteners have been torqued before you perform the additional turns. Turn the fastener according to the speci�ed amount. The speci�ed amount will normally be equal to or greater than 90°. The speci�ed amount will normally be in 30° increments. Turns of 120° or 180° are preferred.

Turns of 120° or 180° are easily measured by the points of the hex head of the fastener. Lubrication may be speci�ed in order to reduce the effort that is required for the �nal turn. The use of the torque-turn method will allow the following:

• Increase the life of the fastener.

• Maximize the potential clamping force of a fastener.

Typical applications are the following:

• Track bolts

• Sprocket bolts

• Connecting rod bolts

• Engine Cylinder Heads

• Drive Shaft bolts

Note: Too much tension on the bolt will cause the bolt to be stretched beyond the point of yield. The bolt will be permanently stretched. The bolt will loosen the grip on the parts that are being fastened. If the bolt is tightened again, the bolt will break. Do not reuse bolts that have been permanently stretched.

Torque Sequence Unless the bolt tightening sequence is speci�ed by the Service Manual, the fasteners should be tightened in a cross pattern. Use Step 1 through Step 5 unless the tightening sequence is speci�ed:

1. Hand tighten all fasteners. Larger fasteners may require the use of a small hand wrench.

2. Torque all fasteners to 40% of full torque.

3. Torque all fasteners to 70% of full torque.

SENR3130-12 5

4. Torque all fasteners to full torque by using a cross pattern. Large �anges may require additional passes.

5. Apply at least one �nal full torque to all fasteners in a clockwise direction until all torque is uniform.

Large �anges may require additional passes.

Note: Final torque may be a turn.

i03508884

Metric (ISO) Fasteners SMCS Code: 7553

Metric (ISO) Nuts and Bolts g00909614Illustration 1

Note: The following table has the recommended standard torque values for metric nuts and bolts for use on all Caterpillar equipment and Mitsubishi engines.

Table 1

Thread Size mm Torque

M6 12 ± 3 N·m (105 ± 27 lb in)

M8 28 ± 7 N·m (250 ± 62 lb in)

M10 55 ± 10 N·m (41 ± 7 lb ft)

M12 100 ± 20 N·m (75 ± 15 lb ft)

M14 160 ± 30 N·m (120 ± 22 lb ft)

M16 240 ± 40 N·m (175 ± 30 lb ft)

M20 460 ± 60 N·m (340 ± 44 lb ft)

M24 800 ± 100 N·m (590 ± 75 lb ft)

M30 1600 ± 200 N·m (1180 ± 150 lb ft)

M36 2800 ± 350 N·m (2060 ± 260 lb ft)

Note: The following table has the recommended standard torque values for metric nuts and bolts for use on Perkins engines.

Table 2

Thread Size mm Torque

M6 5 N·m (44 lb in)

M8 22 N·m (195 lb in)

M10 44 N·m (32 lb ft)

M12 78 N·m (60 lb ft)

M14 124 N·m (90 lb ft)

M16 177 N·m (130 lb ft)

M18 200 N·m (150 lb ft)

M20 400 N·m (300 lb ft)

M24 790 N·m (580 lb ft)

Note: The difference between Caterpillar standard torque values and Perkins standard torque values are due to different classes of fasteners. Caterpillar uses class 10.9 fasteners. Perkins uses class 8.8 fasteners. The different class of fasteners have different tensile strengths.

Metric (ISO) Taperlock Studs Note: The following table has the recommended standard torque values for metric taperlock studs for use on all Caterpillar equipment and Mitsubishi engines.

Table 3

Thread Size mm Torque

M6 8 ± 3 N·m (71 ± 27 lb in)

M8 17 ± 5 N·m (150 ± 44 lb in)

M10 35 ± 5 N·m (26 ± 4 lb ft)

M12 65 ± 10 N·m (48 ± 7 lb ft)

M16 110 ± 20 N·m (80 ± 15 lb ft)

M20 170 ± 30 N·m (125 ± 22 lb ft)

M24 400 ± 60 N·m (300 ± 44 lb ft)

M30 750 ± 80 N·m (550 ± 60 lb ft)

M36 1200 ± 150 N·m (880 ± 110 lb ft)

Note: The following table has the recommended standard torque values for Metric taperlock studs for use on Perkins engines.

6 SENR3130-12

Table 4

Thread Size mm Torque

M6 5 N·m (44 lb in)

M8 11 N·m (97 lb in)

M10 18 N·m (160 lb in)

M12 25 N·m (220 lb in)

Metric (ISO) Machine Screws g00908932Illustration 2

Table 5

Thread Size mm Torque

M1.6 0.10 ± 0.01 N·m (0.9 ± 0.1 lb in)

M2 0.15 ± 0.01 N·m (1.3 ± 0.1 lb in)

M2.5 0.35 ± 0.05 N·m (3.1 ± 0.4 lb in)

M3 0.50 ± 0.05 N·m (4.4 ± 0.4 lb in)

M4 1.70 ± 0.25 N·m (15.0 ± 2.2 lb in)

M5 2.25 ± 0.25 N·m (19.9 ± 2.2 lb in)

Hex Button Head Screw and Set Screws g01186742Illustration 3

Table 6

Thread Size mm

Torque

M3 .6 ± .1 N·m (5 ± 0.9 lb in)

M4 2 ± .3 N·m (18 ± 3 lb in)

M5 4 ± .5 N·m (35 ± 4 lb in)

M6 6 ± 1 N·m (55 ± 9 lb in)

M8 15 ± 2 N·m (135 ± 18 lb in)

M10 30 ± 7 N·m (265 ± 62 lb in)

M12 50 ± 10 N·m (37 ± 7 lb ft)

M14 80 ± 15 N·m (60 ± 11 lb ft)

M16 125 ± 20 N·m (90 ± 15 lb ft)

M20 250 ± 40 N·m (185 ± 30 lb ft)

M24 425 ± 50 N·m (310 ± 37 lb ft)

M30 850 ± 100 N·m (620 ± 75 lb ft)

M36 1500 ± 200 N·m (1100 ± 150 lb ft) i03517320

English (SAE) Fasteners SMCS Code: 7553

English (SAE) Nuts and Bolts g00908911Illustration 4

SENR3130-12 7

Table 7

Thread Size Inch Torque

1/4 12 ± 3 N·m (105 ± 27 lb in)

5/16 25 ± 6 N·m (220 ± 53 lb in)

3/8 47 ± 9 N·m (35 ± 7 lb ft)

7/16 70 ± 15 N·m (50 ± 11 lb ft)

1/2 105 ± 20 N·m (75 ± 15 lb ft)

9/16 160 ± 30 N·m (120 ± 22 lb ft)

5/8 215 ± 40 N·m (160 ± 30 lb ft)

3/4 370 ± 50 N·m (275 ± 37 lb ft)

7/8 620 ± 80 N·m (460 ± 60 lb ft)

1 900 ± 100 N·m (660 ± 75 lb ft)

1 1/8 1300 ± 150 N·m (960 ± 110 lb ft)

1 1/4 1800 ± 200 N·m (1320 ± 150 lb ft)

1 3/8 2400 ± 300 N·m (1780 ± 220 lb ft)

1 1/2 3100 ± 350 N·m (2280 ± 260 lb ft)

English (SAE) Taperlock Studs Table 8

Thread Size Inch Standard Torque

1/4 8 ± 3 N·m (70 ± 27 lb in)

5/16 17 ± 5 N·m (150 ± 44 lb in)

3/8 35 ± 5 N·m (26 ± 4 lb ft)

7/16 45 ± 10 N·m (33 ± 7 lb ft)

1/2 65 ± 10 N·m (48 ± 7 lb ft)

5/8 110 ± 20 N·m (80 ± 15 lb ft)

3/4 170 ± 30 N·m (125 ± 22 lb ft)

7/8 260 ± 40 N·m (190 ± 30 lb ft)

1 400 ± 60 N·m (300 ± 44 lb ft)

1 1/8 525 ± 60 N·m (390 ± 44 lb ft)

1 1/4 750 ± 80 N·m (550 ± 60 lb ft)

1 3/8 950 ± 125 N·m (700 ± 90 lb ft)

1 1/2 1200 ± 150 N·m (880 ± 110 lb ft)

English (SAE) Machine Screws g00908932Illustration 5

Table 9

Thread Size No. Torque

0-80 0.10 ± 0.01 N·m (0.9 ± 0.1 lb in)

1-64 0.15 ± 0.01 N·m (1.3 ± 0.1 lb in)

2-56 0.25 ± 0.02 N·m (2.2 ± 0.2 lb in)

3-48 0.35 ± 0.05 N·m (3.1 ± 0.4 lb in)

4-40 0.50 ± 0.05 N·m (4.4 ± 0.4 lb in)

5-40 0.70 ± 0.10 N·m (6.2 ± 0.9 lb in)

6-32 0.90 ± 0.10 N·m (8.0 ± 0.9 lb in)

8-32 1.70 ± 0.25 N·m (15.0 ± 2.2 lb in)

10-24 2.25 ± 0.25 N·m (19.9 ± 2.2 lb in)

12-24 3.40 ± 0.60 N·m (30.1 ± 5.3 lb in)

Hex Button Head Screw and Set Screws g01186972Illustration 6

8 SENR3130-12

Table 10

Thread Size inch

Torque

# 4 & #5 .6 ± .1 N·m (5 ± 0.9 lb in)

#6 & #8 2 ± .3 N·m (18 ± 3 lb in)

#10 & #12 4 ± .5 N·m (35 ± 4 lb in)

1/4 6 ± 1 N·m (55 ± 9 lb in)

5/16 13 ± 3 N·m (115 ± 27 lb in)

3/8 25 ± 6 N·m (220 ± 53 lb in)

7/16 40 ± 8 N·m (20 ± 6 lb ft)

1/2 60 ± 12 N·m (44 ± 9 lb ft)

9/16 85 ± 15 N·m (65 ± 11 lb ft)

5/8 115 ± 20 N·m (85 ± 15 lb ft)

3/4 200 ± 40 N·m (150 ± 30 lb ft)

7/8 325 ± 40 N·m (240 ± 30 lb ft)

1 500 ± 65 N·m (370 ± 48 lb ft)

1 1/8 700 ± 90 N·m (520 ± 65 lb ft)

1 1/4 1000 ± 125 N·m (740 ± 90 lb ft)

1 3/8 1300 ± 150 N·m (960 ± 110 lb ft)

1 1/2 1700 ± 200 N·m (1260 ± 150 lb ft) i03518060

Ground Engaging Tool (G.E.T.)

Fasteners SMCS Code: 7553

Ground Engaging Tools (G.E.T.) are secured by many types of bolts. Refer to Table 11 for the correct torque for the following combinations of fasteners for G.E.T.:

• Plow bolts and nuts

• Hex head bolts and nuts

Table 11

Torque(1)Thread Size Inch N·m lb ft

5/8 inch 270 ± 40 200 ± 30

3/4 inch 475 ± 60 350 ± 45

7/8 inch 750 ± 90 550 ± 65

1 inch 1150 ± 150 850 ± 110

1 1/4 inch 2300 ± 300 1700 ± 220

(1) These values are only for Caterpillar bolts for cutting edges.

Personal injury can result when installing plow bolts. The appropriate safety equipment must be worn when striking the plow bolts. To avoid injury to your eyes and ears, wear protective glasses and hearing protection during this procedure.

g00909058Illustration 7

View of a typical plow bolt

Plow bolts must be installed properly. Refer to the following procedure for the correct installation of plow bolts.

1. Clean all surfaces that contact the bolt. Remove all occurrences of the following conditions:rust, paint, nicks, and burrs

2. Tighten the nut to the correct torque. Refer to Table 11 for the correct torque.

3. Use a hammer to strike the head of the bolt. The bolt must be struck with signi�cant force.

Note: The head of the bolt may be recessed below the mounting surface. Use a suitable punch in order to transfer the hammer blow to the bolt head.

4. Tighten the nut to the correct torque. Refer to Table 11 for the correct torque.

SENR3130-12 9

i03515062

Installation of Fittings SMCS Code: 7553

Note: The tightening sequence of the fasteners that attach a tube assembly or hose assembly to the machine is very critical to the proper function of the machine. The sealing surfaces of the tube assembly or hose assembly should be secured squarely. The sealing surfaces of the tube assembly or hose assembly should be tightened to the serviced component (control valve, cylinder, hydraulic motor, etc). Perform this procedure prior to the �nal tightening of any clamps or clips that are used in order to fasten the tube assembly or the hose assembly to the machine.

Fittings have different connections. Fittings may have two completely different ends. Be sure to use the proper torque for the end of the �tting that is used.

The following list contains some common types of �ttings.

• Straight Thread O-Ring (STOR)

• Adjustable Straight Thread O-Ring (STOR)

• O-Ring Face Seal (ORFS)

• Tapered Pipe Thread (NPT and NPTF)

• 37 Degree Flare Fitting

• 45 Degree Flare Fitting

• 45 Degree Inverted Flare Fitting

• Split Flange Coupling

Installation of Split Flange Couplings

1. For a metal tube to hose installation, install the tube and tighten all bolts �nger tight at the rigid end.

2. Install the hose and tighten all bolts �nger tight.

3. Put the hose in a position so that the hose does not make contact with the machine or with another hose.

g00906528Illustration 8

4. Position the split �ange parallel over the port.

Tighten the bolts on both connections to the proper torque. Follow the prescribed torque sequence for split �ange connections. Refer to Illustration 8. Add the measurement of gap (A) to the measurement of gap (B). The total must not exceed 4.0 mm (0.16 inch).

5. Start the engine.

6. Move the implement control levers to all of the positions.

7. Look at the hose during movement of the implement. Ensure that the hose is not in contact with the machine or with other hoses.

Note: For hoses that cross an articulation hitch, check for contact during articulation. For hoses that connect to the steering system, check for contact during steering.

8. Shut off the engine.

9. If the hose contacts other hoses or the machine during the test, loosen the bolts and reposition the hose. Repeat steps 3 through 8 until there is no contact.

Installation of Adjustable STOR Fittings This type of �tting is used in many applications. One end of the �tting will be an adjustable STOR �tting.

The other end will be different. Always use the same installation procedure for the STOR end. Adjustable STOR �ttings can be positioned before tightening.

10 SENR3130-12

g01848653Illustration 9 Elbow body assembly

(1) End that connects to the tube or hose

(2) Fitting body

(3) Locknut

(4) Backup washer

(5) O-ring seal

(6) End that is assembled to the mating part

1. Put locknut (3), backup washer (4) and O-ring seal

(5) as far away from the threads as possible. Hold these components in this position. Turn the �tting into the mating part. Turn the �tting until backup washer (4) contacts the surface of the mating part.

Note: Excessive use of the wrench will distort the washer. Distortion of the washer will prevent proper sealing.

2. Put the �tting assembly in the correct position.

loosen �tting (2) until the correct assembly position is achieved. Do not loosen the �tting more than 360 degrees. Install the tube or hose hand tight in order to verify the orientation of the �tting.

Tighten the �tting (2) to the torque that is shown in the correct chart for the �tting that is used.

Tighten locknut (3) to the torque that is shown in the correct chart for the �tting that is used. Use a backup wrench, when the locknut is tightened.

Note: Torque the �tting prior to the locknut.

Note: If the �tting is not adjustable, the hex on the body replaces the locknut. To install this type of �tting, tighten the hex against the face of the mating part.

Excessive tightening of the connectors can cause failure. Connectors that are under tightened can also cause failures. The following failures occur:

• Excessive tightening can expand a loose ferrule into the nut. This will cause the ferrule to lock up in the nut and the nut will not function properly.

• Excessive tightening can split the nut on the end of the tube or can split the ferrule.

• Excessive tightening can gall or excessive tightening can strip the threads of the nut.

Note: If the above conditions occur due to excessive tightening, the damaged �uid connector must be scrapped and the �uid connectors must be replaced.

i03513306

Straight Thread O-Ring Fittings SMCS Code: 7553 g00911924Illustration 10

Note: For torques for plugs, refer to Speci�cations, “Plugs”.

Note: Straight Thread O-Ring �ttings for medium pressure usage will have shorter threaded ends than high pressure �ttings. The torque value for medium pressure Straight Thread O-Ring �ttings will be lower than the torque values that are required for Straight Thread O-Ring �ttings for high pressure �ttings.

SENR3130-12 11

Table 12

Ferrous Straight Thread O-Ring Fitting Torques for Mating with Ferrous Materials Medium Pressure use with 37° Flare Fittings

Nominal Outer Diameter of the Tube

Thread Size Inch

Standard Torque Tolerance (+10% � 0%)

3.18 mm (.125 inch) 5/16 - 24 8 + 1 N·m

(70 + 9 lb in)

4.76 mm (.188 inch) 3/8 - 24 13 + 2 N·m

(115 + 18 lb in)

6.35 mm (.250 inch) 7/16 - 20 17 + 2 N·m

(150 + 18 lb in)

7.94 mm (.312 inch) 1/2 - 20 28 + 3 N·m

(250 + 27 lb in)

9.52 mm (.375 inch) 9/16 - 18 35 + 4 N·m

(26 + 3 lb ft)

12.70 mm (.500 inch) 3/4 - 16 55 + 6 N·m

(41 + 4 lb ft)

15.88 mm (.625 inch) 7/8 - 14 80 + 8 N·m

(60 + 6 lb ft)

19.05 mm (.750 inch) 1 1/16 - 12 100 + 10 N·m

(75 + 7 lb ft)

22.22 mm (.875 inch) 1 3/16 - 12 135 + 14 N·m

(100 + 10 lb ft)

25.40 mm (1.000 inch) 1 5/16 - 12 150 + 15 N·m

(110 + 11 lb ft)

31.75 mm (1.250 inch) 1 5/8 - 12 290 + 29 N·m

(215 + 21 lb ft)

38.10 mm (1.500 inch) 1 7/8 - 12 325 + 33 N·m

(240 + 24 lb ft)

50.80 mm (2.000 inch) 2 1/2 - 12 420 + 43 N·m

(310 + 32 lb ft)

Note: Use 50 percent of the torque values from Table 12 when the �tting or the port material is nonferrous.

Note: Straight Thread O-Ring �ttings for high pressure usage will have longer threaded ends than medium pressure �ttings. The torque value for high pressure Straight Thread O-Ring �ttings will be higher than the torque values that are required for Straight Thread O-Ring �ttings for medium pressure �ttings.

Table 13

Ferrous Straight Thread O-Ring Fittings Torques for Mating with Ferrous Materials

High Pressure use with O-Ring Face Seal Fittings

Nominal Outer Diameter of the Tube

Thread Size Inch

Standard Torque Tolerance (+10% � 0%)

4.76 mm (0.188 inch) 3/8 - 24 12 + 2 N·m

(105 + 18 lb in)

6.35 mm (0.250 inch) 7/16 - 20 22 + 3 N·m

(195 + 27 lb in)

7.94 mm (0.312 inch) 1/2 - 20 30 + 3 N·m

(265 + 27 lb in)

9.52 mm (0.375 inch) 9/16 - 18 48 + 5 N·m

(35 + 4 lb ft)

12.7 mm (0.500 inch) 3/4 - 16 82 + 9 N·m

(60 + 7 lb ft)

15.88 mm (0.625 inch) 7/8 - 14 140 + 14 N·m

(105 + 10 lb ft)

19.05 mm (0.750 inch) 1 1/16 - 12 190 + 19 N·m

(140 + 14 lb ft)

22.22 mm (0.875 inch) 1 3/16 - 12 250 + 25 N·m

(185 + 18 lb ft)

25.40 mm (1.000 inch) 1 5/16 - 12 300 + 30 N·m

(220 + 22 lb ft)

31.75 mm (1.250 inch) 1 5/8 -12 350 + 36 N·m

(260 + 27 lb ft)

38.10 mm (1.500 inch) 1 7/8 - 12 415 + 42 N·m

(305 + 31 lb ft)

63.50 mm (2.500 inch) 21/2 - 12 510 + 51 N·m

(375 + 38 lb ft)

Note: Use 50 percent of the torque values from Table 13 when the �tting or the port material is nonferrous.

12 SENR3130-12

Table 14

Metric Ferrous Straight Thread O-Ring Fittings Torques for Mating with Ferrous Materials

Ref Nominal Outer Diameter of the Tube

Thread Size

Standard Torque Tolerance (+10% -0%)

4 mm M8 X 1 11 + 2 N·m (95 + 18 lb in)

5 mm M10 X 1 21 + 3 N·m (185 + 27 lb in)

6 mm M12 X 1.5 37 + 4 N·m (27 + 3 lb ft)

8 mm M14 X 1.5 47 + 5 N·m (35 + 4 lb ft)

10 mm M16 X 1.5 58 + 6 N·m (43 + 4 lb ft)

12 mm M18 X 1.5 75 + 8 N·m (55 + 6 lb ft)

16 mm M22 X 1.5 105 + 11 N·m (75 + 8 lb ft)

20 mm M27 X 2 180 + 18 N·m (130 + 13 lb ft)

22 mm M30 X 2 225 + 23 N·m (165 + 17 lb ft)

25 mm M33 X 2 325 + 33 N·m (240 + 24 lb ft)

30 mm M42 X 2 350 + 36 N·m (260 + 27 lb ft)

38 mm M48 X 2 440 + 45 N·m (325 + 33 lb ft)

50 mm M60 X 2 525 + 53 N·m (390 + 39 lb ft)

Note: Use 50 percent of the torque values from 14 when the �tting or the port material is nonferrous.

i03514960

Plugs SMCS Code: 7553

Straight Thread O-Ring Plugs (Hex Drive) g00911999Illustration 11

Table 15

Thread Size Inch

Torque Tolerance (+10% � 0%)

5/16 9 + 1 N·m (80 + 9 lb in)

3/8 17 + 2 N·m (150 + 18 lb in)

7/16 23 + 3 N·m (205 + 27 lb in)

1/2 28 + 3 N·m (250 + 27 lb in)

9/16 34 + 4 N·m (25 + 3 lb ft)

3/4 60 + 6 N·m (44 + 4 lb ft)

7/8 115 + 12 N·m (85 + 9 lb ft)

1 1/16 140 + 14 N·m (105 + 10 lb ft)

1 3/16 190 + 19 N·m (140 + 14 lb ft)

1 5/16 210 + 21 N·m (155 + 15 lb ft)

1 5/8 290 + 29 N·m (215 + 21 lb ft)

1 7/8 325 + 33 N·m (240 + 24 lb ft)

2 1/2 420 + 43 N·m (310 + 32 lb ft)

Note: Use 50 percent of the torque values from Table 15 when the �tting or the port material is nonferrous.

Straight Thread O-Ring Plugs (Socket Drive) g00912006Illustration 12

Note: The socket may be hexagonal or a square recessed drive.

SENR3130-12 13

Table 16

Thread Size Inch

Torque Tolerance (+10% � 0%)

5/16 5 + 1 N·m (44 + 9 lb in)

3/8 11 + 2 N·m (100 + 18 lb in)

7/16 16 + 2 N·m (140 + 18 lb in)

1/2 20 + 2 N·m (180 + 18 lb in)

9/16 35 + 4 N·m (26 + 3 lb ft)

3/4 70 + 7 N·m (50 + 5 lb ft)

7/8 100 + 10 N·m (75 + 7 lb ft)

1 1/16 170 + 17 N·m (125 + 13 lb ft)

1 3/16 215 + 22 N·m (160 + 16 lb ft)

1 5/16 270 + 27 N·m (200 + 20 lb ft)

1 5/8 285 + 29 N·m (210 + 21 lb ft)

1 7/8 370 + 37 N·m (270 + 27 lb ft)

2 1/2 415 + 42 N·m (305 + 31 lb ft)

Drain Plugs with Straight Threads g01848045Illustration 13

Note: Plug (A), plug (B) and plug (C) are used with a gasket. Conical seal plug (D) does not use a gasket.

Table 17

Type of Plug

Thread Size Inch

Torque Tolerance (+10% � 0%)

1/2 - 13 20 + 5 N·m (175 + 44 lb in)

5/8 - 11 35 + 5 N·m (26 + 4 lb ft)

3/4 - 12 3/4 - 16

50 + 5 N·m (37 + 4 lb ft)A

7/8 - 14 1 1/8 - 12

70 + 15 N·m (52 + 11 lb ft)

1 5/16 - 12 1 1/2 - 12

90 + 15 N·m (66 + 11 lb ft) B

2 - 12 125 + 15 N·m (92 + 11 lb ft)

1 1/8 - 12 70 + 15 N·m (52 + 11 lb ft) C

1 5/16 - 12 90 + 15 N·m (66 + 11 lb ft)

1/2 - 20 11 + 4 N·m (97 + 35 lb in)

7/8 -14 55 + 7 N·m (41 + 5 lb ft)

1 3/8 -13 90 + 15 N·m (66 + 11 lb ft) D

1 1/2 - 12 110 + 15 N·m (81 + 11 lb ft)

Note: Use 50% of the values in Table 17 when either the plug or the port material is nonferrous.

Straight Thread O-Ring Plugs (Mechanical Joint Tube Assemblies) g00912010Illustration 14

Note: When you tighten the plug, the torque must not be transmitted to the joint between the tube and the elbow.

14 SENR3130-12

Table 18

Thread Size Inch

Torque

7/8 150 ± 25 N·m (110 ± 18 lb ft)

1 1/16 200 ± 25 N·m (150 ± 18 lb ft)

1 3/16 275 ± 35 N·m (200 ± 26 lb ft)

1 1/4 275 ± 35 N·m (200 ± 26 lb ft)

1 5/16 300 ± 40 N·m (220 ± 30 lb ft)

1 5/8 450 ± 50 N·m (330 ± 37 lb ft)

1 7/8 575 ± 75 N·m (425 ± 55 lb ft)

2 1/2 1000 ± 100 N·m (740 ± 74 lb ft) i03509272

O-Ring Face Seal Fittings SMCS Code: 7553 g01848710Illustration 15

O-ring face seal �tting (ORFS �tting)

(1) O-ring face seal connector (1A) O-ring groove

(2) O-ring seal

(3) Nut for the O-ring face seal

Table 19

Ferrous ORFS Fitting

Thread Size Inch Standard Torque for Nut (3)

9/16 - 18 26 ± 3 N·m (230 ± 27 lb in)

11/16 - 16 43 ± 5 N·m (30 ± 4 lb ft)

13/16 - 16 65 ± 7 N·m (50 ± 5 lb ft)

1 - 14 109 ± 11 N·m (80 ± 8 lb ft)

1 13/16 - 12 144 ± 15 N·m (105 ± 11 lb ft)

1 7/16 - 12 216 ± 22 N·m (160 ± 16 lb ft)

1 11/16 - 12 304 ± 31 N·m (220 ± 23 lb ft)

2 - 12 360 ± 36 N·m (270 ± 27 lb ft) i03509587

Bulkhead Nuts SMCS Code: 7553 g01848733Illustration 16

(1) Bulkhead connector (1A) Bulkhead nut

Note: The bulkhead connector may have different connections. The type of �uid connection does not affect the torque for nut (1A).

Note: When you assemble the �uid connection, do not use the bulkhead nut (1A) as leverage for a backup wrench. Use the hex on the body (1) of the connector for leverage.

SENR3130-12 15

Table 20

Thread Size Inch

Torque

5/16 8 ± 1 N·m (70 ± 9 lb in)

3/8 10 ± 1 N·m (90 ± 9 lb in)

7/16 17 ± 1 N·m (150 ± 9 lb in)

1/2 21 ± 2 N·m (185 ± 18 lb in)

9/16 27 ± 2 N·m (240 ± 18 lb in)

11/16 36 ± 2 N·m (27 ± 1.5 lb ft)

3/4 45 ± 3 N·m (33 ± 2 lb ft)

13/16 48 ± 3 N·m (35 ± 2 lb ft)

7/8 53 ± 3 N·m (39 ± 2 lb ft)

1 72 ± 4 N·m (55 ± 3 lb ft)

1 1/16 84 ± 5 N·m (60 ± 4 lb ft)

1 3/16 108 ± 6 N·m (80 ± 4 lb ft)

1 5/16 137 ± 7 N·m (100 ± 5 lb ft)

1 7/16 149 ± 8 N·m (110 ± 6 lb ft)

1 5/8 179 ± 9 N·m (130 ± 7 lb ft)

1 11/16 179 ± 9 N·m (130 ± 7 lb ft)

1 7/8 185 ± 10 N·m (135 ± 7 lb ft)

2 203 ± 11 N·m (150 ± 8 lb ft)

2 1/2 262 ± 14 N·m (195 ± 10 lb ft)

Note:

i03512924

Flare Fittings SMCS Code: 7553

The torques in Table 21 are for 37 degree �are �ttings. The torques in Table 22 are for 45 degree �are �ttings and 45 degree inverted �are �ttings.

37 Degree Flare Fittings g01848048Illustration 17

(1) 37 degree �are �tting. (2) Swivel nuts.

Table 21

Nuts for 37 Degree Flare Fittings

Nominal Outer Diameter of the Tube

Thread Size Inch

Standard Torque

Tolerance (+ 10% � 0%)

3.18 mm (.125 inch) 5/16 5 ± 1 N·m

(45 ± 9 lb in)

4.76 mm (.188 inch) 3/8 11 ± 2 N·m

(100 ± 18 lb in)

6.35 mm (.250 inch) 7/16 16 ± 2 N·m

(140 ± 18 lb in)

7.94 mm (.312 inch) 1/2 20 ± 2 N·m

(180 ± 18 lb in)

9.52 mm (.375 inch) 9/16 27 ± 3 N·m

(240 ± 25 lb in)

12.70 mm (.500 inch) 3/4 58 + 6 N·m

(43 + 4 lb ft)

15.88 mm (.625 inch) 7/8 74 ± 8 N·m

(55 ± 6 lb ft)

19.05 mm (.750 inch) 1 1/16 108 ± 11 N·m

(80 ± 8 lb ft)

22.22 mm (.875 inch) 1 3/16 135 ± 14 N·m

(100 ± 10 lb ft)

25.40 mm (1.000 inch) 1 5/16 156 ± 16 N·m

(115 ± 12 lb ft)

31.75 mm (1.250 inch) 1 5/8 217 ± 22 N·m

(160 ± 16 lb ft)

38.10 mm (1.500 inch) 1 7/8 251 ± 26 N·m

(185 ± 19 lb ft)

50.80 mm (2.000 inch) 2 1/2 339 ± 34 N·m

(250 ± 25 lb ft)

Note: Use 50 percent of the torque values from Table 21 when the �tting or the port material is nonferrous.

16 SENR3130-12

45 Degree Flare and 45 Degree Inverted Flare Fittings g01848049Illustration 18

(1) 45 Degree Inverted Flare Fittings. (2) 45 Degree Flare Fittings.

Table 22

45 Degree Flare Fittings and 45 Degree Inverted Flare Fittings

Nominal Outer Diameter of the Tube

Thread Size Inch

Standard Torque

3.18 mm (.125 inch) 5/16 5 ± 1 N·m

(45 ± 9 lb in)

4.76 mm (.188 inch) 3/8 8 ± 1 N·m

(70 ± 9 lb in)

6.35 mm (.250 inch) 7/16 11 ± 1 N·m

(100 ± 9 lb in)

7.94 mm (.312 inch) 1/2 17 ± 1 N·m

(150 ± 9 lb in)

9.52 mm (.375 inch) 5/8 30 ± 2 N·m

(265 ± 18 lb in)

11.11 mm (.438 inch) 11/16 30 ± 2 N·m

(265 ± 18 lb in)

12.70 mm (.500 inch) 3/4 38 ± 2 N·m

(28 ± 2 lb ft)

15.88 mm (.625 inch) 7/8 50 ± 3 N·m

(37 ± 2 lb ft)

19.05 mm (.750 inch) 1 1/16 90 ± 5 N·m

(65 ± 4 lb ft)

22.22 mm (.875 inch) 1 1/4 100 ± 6 N·m

(75 ± 5 lb ft) i03514282

Air Conditioning Fittings SMCS Code: 7553 g01848052Illustration 19

(1) O-ring seal. (2) 45 degree �are �tting.

Table 23

Air Conditioning Fittings

O-Ring Fitting End

45 Degree Flare Fitting EndThread

Size Inch Torque

Torque for Steel Tubes

Torque for Aluminum Tubes

5/8 - 18 14 ± 4 N·m (125 ± 35 lb in)

30 ± 3 N·m (265 ± 27 lb in)

23 ± 3 N·m (205 ± 27 lb in)

3/4 - 16 27 ± 4 N·m (240 ± 35 lb in)

52 ± 5 N·m (38 ± 4 lb ft)

33 ± 4 N·m (290 ± 35 lb in)

7/8 - 14 1 - 14

40 ± 4 N·m (30 ± 3 lb ft)

60 ± 7 N·m (44 ± 5 lb ft)

38 ± 4 N·m (335 ± 35 lb in)

1 1/16 - 14 45 ± 5 N·m (33 ± 4 lb ft)

75 ± 8 N·m (55 ± 6 lb ft)

50 ± 5 N·m (37 ± 4 lb ft)

Table 24

Quick Disconnect Air Conditioning Fittings

Thread Size Inch Torque

7/8 - 20 49 ± 3 N·m (36 ± 2 lb ft)

1 1/4 - 18 62 ± 3 N·m (46 ± 2 lb ft)

SENR3130-12 17

i03517423

Air Brake Fittings SMCS Code: 7553 g01848737Illustration 20

Put nut (1) and sleeve (2) over the tube. Push the tube into the counterbore of the �tting body as far as possible. There are two methods that may be used to tighten the nut. Tighten the nut with one of two methods.

• Tighten nut (1) to the torque that is speci�ed in Table 25.

• Tighten nut (1) by the number of turns that is speci�ed in Table 25. The number of turns is for the turns after the nut is �nger tight.

Table 25

Turn TighteningNominal Outer

Diameter of the Tube

Torque

Nonmetallic Tubing

Copper Tubing

6.35 mm (0.250 inch)

11 ± 3 N·m (97 ± 27 lb in)

3 2

9.53 mm (0.375 inch)

20 ± 3 N·m (175 ± 27 lb in)

4 2

12.70 mm (0.500 inch)

35 ± 6 N·m (26 ± 4 lb ft)

4 2

15.88 mm (0.625 inch)

40 ± 6 N·m (30 ± 4 lb ft)

3 1/2 3

19.05 mm (0.750 inch)

50 ± 6 N·m (37 ± 4 lb ft)

3 1/2 3

Note: Clean the connectors and the seals and lubricate the connectors and seals by using Refrigerant Mineral Oil. This is a special oil that is compatible with R�134a.

i03517443

Tapered Pipe Thread Fittings SMCS Code: 7553

Torque is based on the diameter of the thread. The torque values are identical for coarse threads and �ne threads.

Note: The following table has the recommended standard torque value for tapered pipe thread �tting for use on all Caterpillar equipment and Mitsubishi engines. Use Table 26 as a general recommendation only. Actual values may vary due to variations in the material of the connector. Actual values may vary due to variations in the characteristics of the threads.

Table 26

Tapered Pipe Thread Fittings

Standard Torque Diameter of the Pipe Thread (Inch)

Threads with 5P-3413 Pipe

Sealant Threads without Pipe Sealant

1/16 10 N·m (90 lb in) 10 N·m (90 lb in)

1/8 16 N·m (140 lb in) 16 N·m (140 lb in)

1/4 20 N·m (175 lb in) 25 N·m (220 lb in)

3/8 35 N·m (26 lb ft) 45 N·m (33 lb ft)

1/2 45 N·m (33 lb ft) 60 N·m (44 lb ft)

3/4 60 N·m (44 lb ft) 75 N·m (55 lb ft)

1 75 N·m (55 lb ft) 90 N·m (65 lb ft)

1 1/4 95 N·m (70 lb ft) 110 N·m (80 lb ft)

1 1/2 110 N·m (80 lb ft) 130 N·m (95 lb ft)

2 130 N·m (95 lb ft) 160 N·m (120 lb ft)

Note: Use 50 percent of the torque values from Table 26 when the �tting, the plug, or the port material is nonferrous.

Note: Use 50 percent of the torque values from Table 26 when a tapered thread is mated with a straight thread.

i02387806

Miscellaneous Fittings SMCS Code: 7553

Hi Duty Tube Fittings (Shear Sleeve) g00909648Illustration 21

18 SENR3130-12

Put nut (1) over the tube and push the tube into the counterbore of the �tting body as far as possible.

Turn the nut with a wrench until a small decrease in torque is felt. The small decrease in torque indicates that the sleeve (1A) has been broken off of the nut.

Hold the tube in order to prevent the tube from turning. Tighten the nut for an additional 1 1/2 turns.

SAE Flareless Fittings g00909647Illustration 22

Installing a New Flareless Fitting

Put nut (1) and sleeve (2) over the tube. The head end of the sleeve should be next to the nut. The head end has a shoulder. The nut will be seated against this shoulder when the nut is tightened. Push the tube into the counterbore of the �tting body as far as possible. Turn nut (1) clockwise until the sleeve grips the tube. The sleeve must prevent all movement of the tube. Tighten the nut for an additional 1 1/4 turns.

The sleeve should be seated and the sleeve should give a locking action.

Installing a Used Flareless Fitting

Less turns are required for a used �tting. Put nut (1) and sleeve (2) over the tube. The head of the sleeve should be next to the nut. Push the tube into the counterbore of the �tting body as far as possible.

Tighten the nut until a sudden increase in torque is felt. Next, tighten the �tting for an additional 1/6 to 1/3 turn in order to seat the sleeve.

Flex Fittings g00909645Illustration 23

Put nut (1) and sleeve (2) over the tube and push the tube into the counterbore of the �tting body as far as possible. Tighten the nut until the nut is against the hex part of the �tting body.

i03515082

Hose Clamps SMCS Code: 7553

Worm Drive Band Type Clamps g00910017Illustration 24

Table 27

Width (A) of Clamp Torque for New Hose

7.9 mm (0.31 inch) 1.4 ± 0.3 N·m (12 ± 3 lb in)

13.5 mm (0.53 inch) 4.5 ± 0.7 N·m (40 ± 6 lb in)

15.9 mm (0.63 inch) 7.5 ± 1 N·m (66 ± 9 lb in)

Width (A) of Clamp Torque for Reused Hose(1)

7.9 mm (0.31 inch) 0.8 ± 0.3 N·m (7 ± 3 lb in)

13.5 mm (0.53 inch) 3.0 ± 0.5 N·m (27 ± 4 lb in)

15.9 mm (0.63 inch) 4.5 ± 0.7 N·m (40 ± 6 lb in)

(1) Use this value when the hose is reused. The clamp may be new or reused.

Constant Torque Hose Clamps Use a constant torque hose clamp in place of any worm drive band type clamp. Ensure that the constant torque hose clamp is the same size as the worm drive band type clamp. Due to extreme temperature changes, the hose will heat set. Heat setting can cause worm drive band type clamps to loosen. Loose hose clamps can result in leaks. There have been reports of component failures that have been caused by worm drive band type clamps that have loosened. The constant torque hose clamp will help prevent these failures.

SENR3130-12 19

g01848056Illustration 25

(1) Constant Torque Hose Clamp (Belleville Washer)

(2) Constant Torque Hose Clamp (Tee bolt and Spring)

Use a torque wrench for proper installation of all constant torque hose clamps. There are two types of constant torque hose clamps: Belleville washer (1) and Tee bolt and spring (2)

When the constant torque hose clamp (Belleville washer) (1) is assembled correctly, the Belleville washers (1A) are nearly collapsed �at. The proper torque for screw (1B) is based on the diameter (B) of the clamp. Refer to the following table for the correct torque.

Table 28

Diameter (B) Standard Torque

Up to 50.8 mm (2 inch) 7.5 ± 1 N·m (65 ± 10 lb in)

Greater than 50.8 mm (2 inch)

11 ± 1 N·m (95 ± 10 lb in)

The correct torque for the constant torque hose clamp (tee bolt and spring) (2) is 7.5 ± 1 N·m (65 ± 10 lb in).

Index

A

Air Brake Fittings Air Conditioning Fittings

B

Bulkhead Nuts

E

English (SAE) Fasteners English (SAE) Machine Screws English (SAE) Nuts and Bolts English (SAE) Taperlock Studs Hex Button Head Screw and Set Screws

F

Flare Fittings 37 Degree Flare Fittings 45 Degree Flare and 45 Degree Inverted Flare Fittings

G

General Information Introduction to Torque Torque Sequence Torque-Turn

Ground Engaging Tool (G.E.T.) Fasteners

H

Hose Clamps Constant Torque Hose Clamps Worm Drive Band Type Clamps

I

Important Safety Information Installation of Fittings

Installation of Adjustable STOR Fittings Installation of Split Flange Couplings

M

Metric (ISO) Fasteners Hex Button Head Screw and Set Screws Metric (ISO) Machine Screws Metric (ISO) Nuts and Bolts Metric (ISO) Taperlock Studs

Miscellaneous Fittings Flex Fittings Hi Duty Tube Fittings (Shear Sleeve) SAE Flareless Fittings

O

O-Ring Face Seal Fittings

P

Plugs Drain Plugs with Straight Threads Straight Thread O-Ring Plugs (Hex Drive) Straight Thread O-Ring Plugs (Mechanical Joint Tube Assemblies)

Straight Thread O-Ring Plugs (Socket Drive)

S

Speci�cations Section Straight Thread O-Ring Fittings

T

Table of Contents Tapered Pipe Thread Fittings

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