ROLLER 9U5353 - Caterpillar

Illustration 1. Transmission hydraulic controls.
Illustration 2. Rotary selector spool detent spring assemblies and detent cam.To obtain correct phasing between the selector spool and the range switch, it is essential that the 9W7011 Pins in BOTH of the detent spring assemblies be seated on the detent cam teeth as shown in Illustration 3A. Incorrect switch phasing and erratic shifting will result if the pins are not seated correctly (see examples in Illustrations 3B and 3C).
Illustration 3. Location of 9W7011 Pins (part of 9W7008 Spring Assembly) on 8P9740 Detent Cam.To achieve correct seating of the pins, it is necessary to use the following assembly/adjustment procedure.
1. Assemble the 6T4308 Support Assembly on the selector valve body. Tighten retaining bolts to a low torque.2. Assemble the 9W7008 Detent Spring Assemblies on the support assembly. Tighten retaining bolts to 30 7 N m (22 5 lb ft).3. Loosen the support assembly 4B3388 Bolts ONLY approximately 1/8 turn. The support assembly is increasingly "cocked" with respect to the mounting face on the valve body by the relief valve spring force as the bolts are backed out further. This causes an increase in the force required to move the support assembly across the valve body face. Free movement of the support assembly is required to correctly seat the detent pins.4. Using a .25" (1/4") square drive extension in the end of the detent cam, repeatedly rotate the cam slightly clockwise and counterclockwise within one detent cam tooth space. This will cause the detent spring support assembly to move on the valve body face and assume a position where both of the detent pins will be correctly seated in the cam notches (see Illustration 3A). Visual observation of the movement of the ends of the springs and the detent pins while "rocking" the cam will indicate when the pins are correctly seated.
Illustration 4. Method to rotate transmission rotary selector spool.If the spring support assembly will not move sufficiently to allow seating of BOTH detent pins, it may be necessary to (1) change springs because one or both may not be the correct length, or (2) to modify the bolt holes and the bolt seat spotfaces on the spring support assembly.
An improved 6T4308 Support Assembly (same part number) is in production with elongated bolt holes and larger spotfaces to allow increased movement of the bolts in the holes and bolt seat washers on the spotfaced surfaces. Illustration 5 includes dimensions for reworking the earlier support assembly to the latest configuration.
Illustration 5. Dimensions for modifying earlier 6T4308 Support Assembly.5. When the detent pins are correctly seated, tighten the spring support retaining bolts to 30 7 N m (22 5 lb ft). Again, rotate the cam slightly clockwise and counterclockwise to determine that both detent pins move OUTWARD simultaneously when the cam is rotated in either direction.Following installation of the complete hydraulic control group (including solenoid manifold and range switch) in the transmission, one further step should be taken to determine if phasing of the