WHEEL AS 1R1124 - Caterpillar

15. Align the timing mark on rotary group gear (58) with the timing mark on rotary group gear (57). Install the rotary group into the pump housing with timing marks (56) aligned as shown. Complete Step 16 and Step 17 while the pump housing is still warm to make assembly easier.
To prevent damage to inner bearing (41), force should be applied only to the inner race when it is installed onto the gear.
16. Using a hammer and soft punch, install inner bearing (41) onto auxiliary drive gear (40). 17. While pump housing (55) is still warm, install auxiliary drive gear (40) and the inner bearing into the pump housing.18. Raise the temperature of outer bearing (59) to 80° C (176° F). Using a hammer and soft punch, install the bearing onto auxiliary drive gear (40). 19. Install the O-ring seal on flange (39) and the flange (39) onto the pump housing. Install four bolts (38) and tighten to a torque of 86 N m (65 lb.ft.).
Piston rings (30) and (31) may break apart during installation onto control piston (28). Use care when expanding the piston rings. Wear eye protection to prevent possible personal injury from flying parts.
20. Install piston rings (30) and (31). 21. Install swivel fork (29) in control housing (3) with the machined shoulder toward the small diameter of the control piston. Coat control piston (28) with SAE 10W oil. Install it into the control cover and the swivel fork. Make sure the control piston is installed correctly with the pilot oil hole toward the pump housing mounting surface. 22. Install control spool bushing (25). Install spring (26). Make sure the spring goes against the machined shoulder of swivel fork (29). Plugs (19) and (21) have an integral seal. If the seals on plugs (19) and (21) need to be replaced, the entire plug (19) or (21) must be replaced.23. Install inner pressure averaging valve spool (63) into outer pressure averaging valve spool (60). Install both valve spools into pressure averaging valve housing (23). Install two plugs (19) and (21).24. Install the O-ring seals onto plugs (20). Put two relief valves (62) and springs (61) into plugs (20). Install them into the pressure averaging valve housing. 25. Using 5P960 Multipurpose Grease, install two O-ring seals (64) on pressure averaging valve housing (23).26. Install O-ring seal (65) onto the pressure averaging valve housing. Put 5P960 Multipurpose Grease on O-ring seal (65) and the pressure averaging valve housing tube.
To prevent possible personal injury, do not remove two bolts at the same time and allow the assembly to fly apart. Remove the long bolts, and install the standard bolts one at a time to maintain pressure on the spring.
27. Install pressure averaging valve housing (23) on control housing (3). Using tooling (C), compress the spring behind the housing. Install standard bolts (22) and (24), one at a time to maintain the spring compression. Tighten to a torque of 69 N m (50 lb.ft.). 28. Install bearing (18) in control