ENGINE AR-COMPLETE 2444587 - Caterpillar

Illustration 2 g03447485
Slowly loosen plug (2) . When the dry nitrogen gas begins to escape, stop turning plug (2) . When the discharge of the gas can no longer be heard, turn plug (2) another 360 degrees in a counterclockwise direction.
Remove plug (2) and the O-ring seal.
Slowly loosen plug (3) . When the dry nitrogen gas begins to escape, stop turning plug (3) . When the discharge of the gas can no longer be heard, turn plug (3) another 360 degrees in a counterclockwise direction.
Remove plug (3) and the O-ring seal.
Illustration 3 g03447486
Attach Tooling (A) and a suitable lifting device to valve body (5) . The weight of valve body (5) is approximately 77 kg (170 lb). Remove bolts (4) , the washers, and valve body (5) .
Illustration 4 g03447489
Remove bolts (11) , washers (10) , accumulator cover (9) , accumulator membrane (8) , and accumulator base (7) .
Remove O-ring seal (6) from accumulator base (7) .
Illustration 5 g03447490
Remove plugs (12) and the O-ring seals. Remove fitting (13) . Remove plugs (14) and the O-ring seals.
Illustration 6 g03447492
Use Tooling (B) to remove carrier (15) from valve body (5) .
Illustration 7 g03447536
Remove O-ring seals (16) . Remove U-cup seal (19) , U-cup seal (18) , and buffer seal (17) .
Illustration 8 g03447556
Attach Tooling (C) and a suitable lifting device to piston (20) . Refer to Table 2 for the approximate weight of piston (20) . Remove piston (20) .
Table 2
Sales Model     Piston (20)
Approximate Weight    
H75E    
19 kg (42 lb)    
H95E    
68 kg (150 lb)    
Illustration 9 g03658426
Use a suitable lifting device to reposition head (22) . The weight of head (22) is approximately 216 kg (476 lb).
Use Tooling (D) to remove piston sleeve (21) from head (22) .
Illustration 10 g03447623
Remove O-ring seals (23) from piston sleeve (21) .
Illustration 11 g03447626
Remove wiper seal (25) and U-cup seal (24) from piston sleeve (21) .
Illustration 12 g03447629
Note: Do not remove sleeve (29) unless sleeve (29) needs replaced or if there is concern of debris. The use of dry ice is required for removal of sleeve (29) .
Remove housing (26) , spool (28) , and O-ring seal (27) from housing (26) .
Illustration 13 g03662412
Install Tooling (E) to remove sleeve (29) .
Pack dry ice into sleeve (29) . Use Tooling (E) to remove sleeve (29) after it cools.Note: Do not lower the temperature of sleeve (29) past -70° 5°C (-94° 9°F).Note: Do not use liquid nitrogen or damage to sleeve (29) will occur.