TUBE AS 9Y5258 - Caterpillar

1. Remove drive shaft guard (4) from the machine.2. Disconnect hoses (1), (3) and (5) from the lockup valve.3. Remove the three bolts, washers and lockup valve (2) from the torque converter. Remove the two O-ring seals from the lockup valve. The following steps are for the installation of the lockup clutch valve.4. Put the two O-ring seals in position on the lockup valve. Put the lockup valve in position on the torque converter, and install the three bolts and washers that hold it. Hose (1) is from the transmission relay valve. Hose (3) is from the transmission lube port on the front right side of the transmission. Hose (5) is from the tee between the pump and brake valve.5. Connect hoses (1), (3) and (5) to the lockup valve as shown.6. Install drive shaft guard (4).Disassemble Torque Converter Lockup Clutch Valve
Start By:a. remove torque converter lockup clutch valve
Section A-A
Bottom View Of Valve1. Remove cover (1) from body (18). Remove the O-ring seal from the cover.2. Remove body (2) from body (18).3. Disassemble body (2) as follows:a. Remove spring (7), orifice (6) and the O-ring seal from the body.b. Remove spring (19), shims (20), piston (21) and piston (22) from the body.c. Remove plugs (3) and (5), and remove decay orifice (plug) (4) from the body.4. Remove plug (15) and spring (13) from the body.5. Remove spool (9) and stop (8) from the body. Remove slug (14) from the spool.6. Remove the snap ring, retainer (12), spring (11) and ball (10) from the spool.7. Remove plug (17) and valve (16) from body (18).
Section B-B8. Remove cover (23) and two springs (25) from the body. Remove the O-ring seal and shims (24) from the cover.9. Remove plug (28) and spool (26) from the body. Remove slug (27) from the spool.10. Remove the snap ring, retainer (31), spring (30) and ball (29) from spool (26).
Section C-C11. Remove plugs (32) and (37) from the body.12. Remove spring (33), spool (34) and washer (35) from the body. Remove O-ring seal (36) from the spool.
Do not use caustic (corrosive) materials to clean any parts in this valve group. Caustic materials will cause corrosion and damage to parts.
Assemble Torque Converter Lockup Clutch Valve
Bottom View Of Valve
Section C-C1. Install the O-ring seals on plugs (32) and (37). Install O-ring seal (36) on spool (34).2. Put spool (34) washer (35) and spring (33) in position