JET ASSEM. 9B4953 - Caterpillar

Important Information
To avoid personal injury when tests must be done in a closed area, activate the brakes and use blocks to prevent machine movement during the tests. Let only approved personnel on the machine. Keep other personnel off the machine and in view of the operator.
All tests and adjustments must be made with the oil in the hydraulic control system at normal temperature of operation. Be sure the linkage adjustments are correct before any tests are made.
TRANSMISSION HYDRAULIC CONTROLS SCHEMATIC (FIRST FORWARD) 1. Selector valve body.2. Priority valve.3. Oil filter.4. Speed selector valve spool.5. Oil pump.6. Directional selector valve spool.7. Oil sump and screen.8. Torque converter inlet relief valve spool.9. Torque converter.10. Pressure control valve body.11. Oil cooler.12. Orifice.13. Transmission lubrication relief valve.14. Load piston.15. Modulating relief valve spool.16. Differential valve spool.A. Speed clutch oil pressure tap (P1).B, C and D. Transmission pump oil pressure taps.E. Directional clutch oil pressure tap (P2).F. Torque converter outlet oil pressure tap.G. Torque converter inlet oil pressure tap (P3).H. Transmission lubrication oil pressure tap.Transmission Testing and Location Of The Pressure Taps
B. and C. Oil pump.
A. Speed clutch, P1. E. Direction clutch, P2. G. Inlet to the torque converter, P3. H. Lubrication.
F. Outlet from the torque converter.
I. Right steering clutch. J. Left steering clutch. Use 5P5224 PRESSURE GAUGE KIT to check pressure.
7S4621 PRESSURE CONTROL VALVE GROUP
10. Body of the pressure control valve. 14. Load piston. 15. Modulating relief valve. 16. Differential valve. 17. Spacers.
2P9179 SELECTOR VALVE GROUP
1. Body of the selector valve. 4. Speed selector valve spool. 6. Spool for direction selector. 8. Torque converter inlet relief valve spool.
8P1891 PRIORITY VALVE GROUP
2. Priority valve. 18. Spacers. Adjustment Of Control Linkage
To avoid personal injury, do not make any adjustments to the linkage with the engine running.
1. Remove cotter pins and pins from levers (23) and (25).
TRANSMISSION CONTROL LINKAGE
19. Transmission selector lever. 20. Transmission lock lever. 21. Rod. 22. Rod. 23. Lever.2. Move transmission selector lever (19) to the FORWARD side of the NEUTRAL opening of shift guide (26) as shown.3. Move lever (23) toward the front of the machine. The movement of lever (23) will move direction spool (6) to FORWARD position.
TRANSMISSION SELECTOR LEVER ON THE FORWARD SIDE OF THE NEUTRAL OPENING
19. Transmission selector lever. 26. Shift guide.4. Make adjustments, as necessary, to the length of rod (22) until pin can be installed.
TOP VIEW OF TRANSMISSION CONTROL LINKAGE
19. Transmission selector lever. 21. Rod. 22. Rod. 23. Lever. 24. Rod. 25. Lever.5. Move lever (25) clockwise (when seen from left side of machine). The movement will put speed spool (4) in the NEUTRAL position.
TRANSMISSION SELECTOR LEVER IN THE CENTER NEUTRAL POSITION
19. Transmission selector lever. 26. Shift guide.6. Move transmission selector lever (19) to the center of the NEUTRAL opening of shift guide (26), as shown.7. Make adjustments, as necessary, to the length of rod (24) until pin can be installed. When lever (20) is moved to the ON position (pushed down), transmission selector lever (19) must move to the NEUTRAL position of shift guide (26).