D6M Track-Type Tractor Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the bulldozer control valve. Refer to Disassembly and Assembly, "Bulldozer Control Valve - Remove" for the machine that is being serviced.

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

Note: The disassembly of the two-stem bulldozer control valve are similar to the disassembly of the three-stem bulldozer control valves. Only the three-stem control valve is shown.

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Illustration 1	g00723677

1. Remove three nuts (2) and cover (1) .

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Illustration 2	g00723680

2. Separate valves (5), (3) and (6) from manifold (4). Remove O-ring seals (7). Remove shims (9) between each of the valves and manifold (4). Remove studs (8) .

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Illustration 3	g00723694

3. Do the following procedure to disassemble valve (3) and valve (5) :

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   NOTICE
   Do not, at any time, mix the components etween the valve groups during the disassembly or the assembly.

   1. Remove plug (11), valve (10), spring (13) and springs (14) from body (12). Remove the O-ring seal from the plug.
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   Illustration 4	g00723697

   2. Remove bolts (15), retainer (17), guard (16) and filter (18) from body (12) .
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   Illustration 5	g00723700

   3. Remove two bolts (19) and housing (21) .

   4. Remove spool (20) from body (12) .
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   Illustration 6	g00723702

   5. Compress spring (22). Remove bolt (24) and spacer (23). Remove retainer (26), spring (22) and retainer (25) from spool (20) .
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   Illustration 7	g00723703

   6. Remove valve (27) from body (12). Remove the three O-ring seals from the valve.

   7. Remove seat (28) and ball (29). Remove the O-ring seal from the seat.

   8. If necessary, remove the seal from each end of body (12) .

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Illustration 8	g00723707

4. Do the following procedure to disassemble valve (6) :

   1. Remove plug (31), valve (30), spring (34) and spring (35) from body (32). Remove the O-ring seal from the plug.
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   Illustration 9	g00723709

   2. Remove plug (37), spring (36) and valve (35) from body (38). Remove the O-ring seals and the backup ring from the plug.

   3. Remove body (38). Remove the O-ring seals and the backup ring from the body.
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   Illustration 10	g00723711

   4. Remove two bolts (41), retainer (39), guard (42) and filter (40) .
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   Illustration 11	g00723715

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   Illustration 12	g00723719

   5. Hold retainer (45) in position with a press and Tool (A). Remove snap ring (43) with Tool (B) .

   6. Remove retainer (45) and spring (44) from housing (46) .
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   Illustration 13	g00723723

   7. Remove piston (49) and eight balls (47) from housing (46). Remove the washer from housing (46) .

   8. Remove three bolts (48) and housing (46). Remove the O-ring seal from the housing.
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   Illustration 14	g00723725

   9. Remove O-ring seals (52) and (53) from the piston. Remove seals (50) and (51) from the piston.
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   Illustration 15	g00723729

   10. Remove spool (54) from body (32) .
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   Illustration 16	g00723732

   11. Compress spring (60). Remove shaft (58) and coupling (57) from spool (54) .

   12. Remove retainer (56), spring (60), spacer (55) and retainer (59) .
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   Illustration 17	g00723736

   13. Remove valve (62) from body (32). Remove the O-ring seals from the valve.

   14. Remove seat (61) and ball (63). Remove the O-ring seals from the seat.

   15. If necessary, remove the seals from each end of body (32) .