Installation Of Antispin Control Groups{4271} Caterpillar

These antispin control groups help to increase traction at the drive wheels. If either drive wheel starts to spin (lose traction) the operator can increase power to the wheel that has better traction with a manual application of the brake on the wheel that has the loss of traction. Installation of these control groups is the same outside the cab. There are several differences inside the cab. Use this instruction along with the Service Manual and Parts Book for the correct installation procedure.

NOTE: See the Operation and Maintenance Guide Form SEBU5825 "Supplement 768C, 769C, 772B, 773B, 776 and 777 Off Highway Trucks" for the operation of the antispin control groups. Use pipe thread sealant on all pipe thread connections.

6G8690 And 5T1355 Control Groups (Outside The Cab)

(1) Release the air pressure from the air tanks. Disconnect and remove hose (1) and elbows (2) and (3). These parts will not be needed again. Install a 9S4183 Plug and 3D2824 Seal where elbow (3) was removed.

(2) Disconnect hose (4) and remove elbow (5) from the brake master cylinder. Install 307959 Tee (6) where the elbow was removed. Connect hose (4) to tee (6).

(3) Fasten 6G7665 Valve (7) to the frame with 6D4636 Clip (8) and the original hardware. Install 307948 Elbow (9) in valve (7) with a 3K360 Seal. Connect 7G4285 Hose Assembly (10) to tee (6) and elbow (9). Fasten hose (10) to the frame with 6D4636 Clip (11) and the former hardware.

(4) Tackweld 6G6 Plate (12) to the axle housing at approximately the location shown. Make a 5.0 (.19") fillet weld around plate (12). Fasten 6G7333 Plate (13) to plate (12) with four S509 Bolts and 5M2894 Washers. Install 6G7709 Valve Group (14) to plate (13) with four S1571 Bolts, 5M2894 Washers and 1D4717 Nuts.

(5) Install four 8M505 Connectors (15), (16), (17) and (18) with 3K360 Seals in valve (14) as shown. Install 3P2298 Elbow (19) with a 3D2824 Seal. Connect 9S1690 Hose Assembly (20) to elbow (19) and connector (18). Connect 9G4447 Hose (21) to valve (7) and connector (15).

(6) Install 8M547 Elbow (22) on connector (16). Disconnect hose (23) from tube (24). Connect hose (23) to elbow (22). Connect 9D2224 Hose Assembly (25) to tube (24) where hose (23) was removed and to connector (17). Install 4S7606 Elbows (26) and (27) in valve (14). Connect 7D4562 Hose Assemblies (28) and (29) to elbows (26) and (27), respectively.

(7) Fasten hoses (28) and (29) along the frame with three 5K8451 Clips (30). Install two 9M8662 Couplings in the "7" and "9" holes in the cab firewall. Install a 5H4778 Elbow in each coupling. Connect hose (28) to the elbow and coupling in "7" hole. Connect hose (29) to the elbow and coupling in hole "9". Use 3S2093 Straps (31) as needed to fasten hoses (28) and (29) to existing hoses.

6G8690 Control Group (Inside The Cab)

(1) Disconnect and remove hose (1) from the brake control valve and from the retarder control valve. Install three 9M8662 Couplings (2), (3) and (4) as shown. If the three holes in plate (5) are not present, use a 20.0Ø (.78"Ø) drill bit to make three holes (A) at approximately the location shown.

(2) Install 3S6115 Tee (6) in coupling (4). Connect 6D9853 Hose Assembly (7) to tee (6) and to the brake control valve where the former hose was removed. Connect 4S7572 Hose Assembly (8) to tee (6) and to the retarder control valve where the former hose was removed. Install 3D7587 Elbow (9) and 5H4778 Elbow (10) in couplings (2) and (3) respectively. Connect 7D3024 Hose Assembly (11) to the coupling in hole "7" (right rear of the cab) and connect 7D3024 Hose Assembly (12) to the coupling in hole "9". Connect hoses (11) and (12) to elbows (9) and (10) as shown.

(3) Install 3D7587 Elbow (13) in the "SUPPLY" opening in 2D6173 Valve (14). Install 3D7587 Elbows (15) and (16) in valve (14). Fasten 6G5 Plate (17) to the steering column with two S509 Bolts and 5M2894 Washers. Fasten valve (14) to plate (17) with two S1617 Bolts and 9M1974 Washers. Install 5H4778 Elbows (18) and (19) in couplings (2) and (3), respectively. Connect 7D5998 Hose Assembly (20) to coupling (4) and to elbow (13). Connect 7D5998 Hose Assembly (21) to elbows (19) and (15). Connect 4S7560 Hose Assembly (22) to elbows (18) and (16). Fasten hoses (20), (21) and (22) to an existing bolt with 6D2834 Clip (23). Install 6G7708 Film (24) on valve (14) as shown.

5T1355 Control Group (Inside The Cab)

(1) Use a 7.5Ø (.30"Ø) drill bit to make two holes (A) through the shift console at the locations shown. Use a 20.5Ø (.81"Ø) drill bit to make three holes (B) at the approximate location shown. Use existing holes (C) as a guide to help find the location for the new holes.

(2) Fasten 5T1341 Bracket (1) to transmission control (2) with two 4F7957 Bolts, 5P537 Washers and 1B4330 Nuts. Install three 3B6552 Elbows (3), (4) and (5), with a 4D2560 Connector in each, in the three openings in 5T1300 Valve (6). Install valve (6) on bracket (1) with two 7H3986 Screws. Install three 9M7357 Coupling Assemblies (7), (8) and (9) with a 4J3430 Stop (10) and 4B4283 Washer (11) on each in holes (B). Make the connections that follow: 4S7529 Hose Assembly (12) to coupling (9) and to the connector in elbow (5); 4S7529 Hose Assembly (13) to coupling (8) and to the connector in elbow (4) and 6D4045 Hose Assembly (14) to coupling (7) and to the connector in elbow (3). Fasten hoses (12) and (13) to an existing bolt with 5K8451 Clip (15). Install 5T1339 Film (16) on bracket (1). Install two 3D7587 Elbows (17) and (18) in the couplings in holes "7" and "9", respectively. These couplings were installed in step 7, page 5. Connect 6D4045 Hose Assembly (19) to elbow (17) and to coupling (8); connect 6D4045 Hose Assembly (20) to elbow (18) and to coupling (9). Remove the plug from the air tank and install 3D8884 Elbow (21) and a 4H6147 Connector where the plug was removed. Connect 4S7528 Hose Assembly (22) to coupling (7) and to elbow (21).