CONTROL GP-TMSN ELECTRONIC 1090588 - Caterpillar

These hydraulic pumps (cushion hitch or cushion hitch and bail) can be installed on the rear of the transmission transfer gear case. This new location for the pump gives better access for service. Certain modifications must be made to the machine before the new pump can be installed.Parts Needed
(1) Release the pressure in the hydraulic tank. Disconnect hose (1) from cushion hitch pump (2). Disconnect and remove hoses (3) from the machine. Remove pump (2). Install an 8S4612 Cover and 6L9965 Seal with two 3B4506 Lockwashers and 1D4717 Nuts where the pump was removed. (2) Remove cover (4) and/or cage (5). Push transmission drive shaft (6) to the front of the machine as far as possible. Measure the distance from the end of shaft (6) to face (A) of gear (7). Subtract this dimension from 37.0 (1.45"). The remainder is the amount to be removed from shaft (6). Remove shaft (6) from the machine. Use a grinder and turn the shaft as needed to make a 90° cut to remove the end of the shaft. Grind a small chamfer on the end of the shaft but do not make the 6.5 (.25") step at the end of the shaft. (3) Inspect cup (8) in the former cage. If the cup is not damaged, remove it and install it in 9G7494 Cage Assembly (9). If the cup is damaged, install a new cup. Use 8S6274 Shims (10) as necessary to get .15 .05 (.006" .002") end play on gear (7). Remove cage (9) and gear (7). Install 3H4192 Snap Ring (11) and 6G3174 Coupling (12) in gear (7). Install shaft (6) and gear (7). Install cage (9) with shims (10) and 3S3074 Seal (13). Cut 8.0 (.31") from the end of two studs (14) or remove the studs and install two 8M1047 Studs in their place. (4) Put 5P3931 Anti-Seize Compound on the shaft of 9T1619 Pump (15) or 7J8030 Pump Group (16). Install the pump on cage (9) with a 6D1004 Gasket, two 1D4717 Nuts and 5M2894 Washers. (5) Disconnect former hose (17) from the hydraulic tank. Install 307945 Elbow (18) and a 7M8485 Seal in pump (15) with a new seal. Connect former suction hose (17) to elbow (18), or to hydraulic pump (16), with the former hardware as shown. Install a new seal in the end of hose (17) and again connect it to the hydraulic tank. Fasten hose (17) with two plastic ties (19) as shown. (6) For 641B, 651B and 657B tractors, make hose (20) from the parts and dimensions shown. For 657B PP tractors, make hose (21) from the parts and dimensions shown. (7) For 657B PP tractors, make hose assembly (22) from the parts and dimension shown. (8) On 641B, 651B and 657B machines, install former 4S2891 Fitting (23) and a new 3D2894 Seal in pump (15). Connect hose assembly (20) to fitting (23) and to cushion hitch filter housing (24); use the original hardware and a