DRIVE GP-FINAL 2847920 - Caterpillar

In order to disassemble resolver valves (54), use the procedure that follows:Note: Only the O-ring seals and backup rings in the resolver valves (54) are serviceable. However, the resolver valve can be disassembled for cleaning and inspection.
Remove two backup rings (58) and two backup rings (59) from resolver valve (54). Remove O-ring seals (55), (56), and (57) from resolver valve (54) .
Remove seat (60) from resolver valve (54) .
Remove ball (61) from resolver valve (54) .
Illustration 22 g00827882
Remove sixteen bolts (62). Remove two manifolds (63) and two spacers (64) from the control valve body. The combined weight of the manifold and a spacer is 34 kg (75 lb).
Illustration 23 g00830800
Illustration 24 g00827888
Separate the spacer from manifold housing (63). In order to disassemble manifold housing (63), use the procedure that follows:
Remove three O-ring seals (68) from manifold housing (63) .
Remove three retainers (67), three springs (66), and three retainers (65) from manifold housing (63) .
Remove three purging screws (70). Remove three nuts (69) and remove plunger assembly (71) and the O-ring seals.
Repeat step 21 for the remaining manifold housing (63) .
Illustration 25 g00830806
In order to disassemble spacer (64), use the procedure that follows.
Remove three O-ring seals (72) from spacer (64) .
Remove three plugs (74) and the O-ring seal. Remove three pistons (73) from spacer (64) .
Repeat step 23 for the remaining spacer (64) .
Illustration 26 g00827891
Remove sixteen bolts (76). Remove two manifolds (75) from the control valve body. The weight of the manifold is 25 kg (54 lb).
Illustration 27 g00830819
Illustration 28 g00827894
In order to disassemble manifold housing (75), use the procedure that follows:
Remove three O-ring seals (80) from manifold housing (75) .
Remove three retainers (79), three springs (78), and three retainers (77) from manifold housing (75) .
Remove three purging screws (82). Remove three nuts (81) and remove plunger assembly (83) and the O-ring seals.
Illustration 29 g00828069
Put identification on spools (84). Spools (84) must be installed in the same position. Remove six spools (84) from the control valve.
Illustration 30 g00830826
Attach Tooling (A) to the control valve. Secure Tooling (A) to a suitable lifting device. Position wood blocks under manifold (86). Illustration 30 shows the position of the wood blocks. Remove five bolts (87) (two bolts on top and three bolts on bottom) that hold valve (88) to manifold (86). Remove control valve (88) from manifold (86). The weight of control valve (88) is 204 kg (450 lb).
Repeat step 28 on control valve (85) .
Illustration 31 g00830827
If necessary, remove all remaining plugs and O-ring seals from control valve (88). If necessary, remove all remaining fittings from the control valve.
Repeat step 30 for control valve (85) .
Illustration 32 g00830829
Illustration 33 g00830830
Remove five small O-ring seals (89), four large O-rings (90) and four large O-rings (91) from manifold (86). If necessary, remove all remaining plugs and fittings from manifold (86) .