REGULATOR AS 1457768 - Caterpillar

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.
Illustration 1 g00889106
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Remove plugs (1), the O-ring seals, plugs (2), and the O-ring seals from counterbalance valve (3).
Illustration 2 g00696975
Remove O-ring seals (4) and (5) from the plugs.
Illustration 3 g00889107
Remove springs (6) and valves (7) from the block.
Illustration 4 g00697000
Remove relief valves (8) from the block.
Illustration 5 g00697004
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Disassemble the relief valves.
Remove backup rings (11) and O-ring seal (10).
Remove O-ring seal (20) from the relief valve.
Remove nut (24).
Remove screw (15) and stop (14) from body (23).
Remove backup ring (22) and O-ring seal (21) from the stop.
Remove piston (18) from the body.
Remove backup rings (19) and O-ring seal (13) from the piston.
Remove springs (12) and (17).
Remove seat (9). Note: At this time, valve (16) is nonserviceable separately.
Illustration 6 g00697089
Illustration 7 g00697090
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Remove bolts (25). Install Tooling (A) into the bolt holes. Loosen remaining bolts (25) evenly in order to relieve spring pressure. Remove bolts (25). Remove Tooling (A). Remove cover (26) from the block.
Illustration 8 g00889108
Remove O-ring seal (27), sleeve (28), spacer (29), spring (30), and guide (31) from the block.
Repeat Step 6 through Step 7 for the remaining cover.
Illustration 9 g00697162
Remove spool (32) from the block.
Illustration 10 g00889110
Remove plug (33) and ball (34) from guide (35). Remove guide (35) from the spool.
Repeat Step 10 for the other side of the spool.
Illustration 11 g00697232
Remove bolts (36). Remove half flanges (37), covers (38), and the O-ring seals from the block.