926M, 930M and 938M Wheel Loaders Power Train Caterpillar

Piston Motor (Hydrostatic) - Assemble - Front Hydrostatic Piston Motor

Usage:

930M HEY

Assembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1U-6340	Threaded Rod	1
B	126-7176	Forcing Screw	1
	126-7183	Push-Puller Plate	1
	4C-5660	Threaded Adapter	1
	8B-7558	Adapter	2
	126-7181	Sliding Plate	4
	126-7178	Puller Leg	2

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Illustration 1	g02804982

Connect piston assembly (39) to shaft assembly (35). Install bolts (39). Tighten bolts (39) to a torque of 9 ± 1 N·m (80 ± 9 lb in).
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Illustration 2 g02804977
Install retaining ring (36), washer (37), and lip seal (38).
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Illustration 3 g02804962
Install shim (33) and spring (32) into barrel (31).
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Illustration 4 g02805041

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Improper assembly of parts that are spring loaded can cause bodily injury.
To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Use Tooling (A) in order to help install barrel (31) onto piston assembly (40) and shaft assembly (35).
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Illustration 5 g02805061
Install shaft assembly (35) into housing (34).
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Illustration 6 g02805081
Use Tooling (B) in order to seat shaft assembly (35) into the housing.
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Illustration 7 g02805137
Remove Tooling (A) and Tooling (B).
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Illustration 8 g02804961
Install barrel (31) and O-ring seal (30).
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Illustration 9 g02804960
Install nut (29). Tighten nut (29) to a torque of 69 ± 15 N·m (51 ± 11 lb ft). Ensure that Dimension (Y) is maintained.
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Illustration 10 g02804959
Install cap (28).
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Illustration 11 g02804958
Install swashplate (27).
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Illustration 12 g02804957
Install piston (26) and trunnion (25).
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Illustration 13 g02804956
Install pump head (24) and bolts (23). Tighten bolts (23) to a torque of 130 ± 15 N·m (96 ± 11 lb ft).
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Illustration 14 g02804943
Install spring (22) and O-ring seals (21).
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Illustration 15 g02804941
Install spring (20).
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Illustration 16 g02804938
Install nut (19). Tighten nut (19) to a torque of 10 ± 1 N·m (89 ± 9 lb in). Ensure that Dimension (X) is maintained.
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Illustration 17 g02804936
Install cap (18).
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Illustration 18 g02804916
Install retainer (17), bushing (16), dowel (15), spring (14), and O-ring seal (13).
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Illustration 19 g02804903

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Improper assembly of parts that are spring loaded can cause bodily injury.
To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Install valve (12) and bolts (11). Tighten bolts (11) to a torque of 37 ± 5 N·m (27 ± 4 lb ft).
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Illustration 20 g02805317
Install valve (10).
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Illustration 21 g02804898
Install plunger (9). Tighten plunger (9) to a torque of 10 ± 3 N·m (89 ± 27 lb in).
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Illustration 22 g02804896
Install nut (8). Tighten nut (8) to a torque of 5 ± 1 N·m (44 ± 9 lb in).
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Illustration 23 g02804877
Install Alan pin (7) (not shown). Tighten Alan pin (7) to a torque of 30 N·m (22 lb ft).
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Illustration 24 g02804736
Install piston (6).
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Illustration 25 g02804720
Install bolt (5). Tighten bolt (5) to a torque of 87 ± 20 N·m (64 ± 15 lb ft). Install O-ring seal (4).
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Illustration 26 g02804719
Install O-ring seal (3) onto valve (2).
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Illustration 27 g02804717
Install valve (2) and install bolts (1).