HOSE AS 2212791 - Caterpillar

Lower boom cylinder (4).
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Disconnect hose assemblies (7) and (8).
Remove bolt (5).
Install Tooling (A) in order to remove pin assembly (6).
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Use the suitable lifting device in order to remove boom cylinder (4) from the machine. The weight of boom cylinder is approximately 295 kg (650 lb).
Repeat steps 5 through 12 for the other boom cylinder. Disassembly and Assembly Information
Table 2
Required Tools
Tool Part Number Part Description Qty
B 1P-1839 Bearing Puller Adapter 1
9U-6832 Nut 1
5P-4184 Tool Stud 1
6V-3175 Double Acting Cylinder 1
3S-6224 Electric Hydraulic Pump Gp 1
FT-1410 Receiving Sleeve 1
4K-0684 Washer 1
C 7M-7456 Bearing Mount Compound 1
Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.
Illustration 7 g01272597Tooling (B) is used for the removal and installation of bearings (1) and (4). (2) Torque for locknut ... 7900 400 N m (5827 295 lb ft) (3) Lubricate the inside diameter and outside diameter with clean grease. (5) Install the seal ring with the slit toward the piston. (6) Lubricate the sealing lip slightly with the lubricant that is being sealed. (7) Apply Tooling (C) to the wiper seal groove prior to assembly. Installation Procedure
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Attach a suitable lifting device to boom cylinder (4). The weight of boom cylinder (4) is approximately 295 kg (650 lb). Install boom cylinder (4).
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Install pin assembly (6) and bolt (5). Connect hose assemblies (7) and (8).
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Attach a suitable lifting device to boom cylinder (4). The weight of boom cylinder (4) is approximately 295 kg (650 lb). Raise the rod end of boom cylinder (4).
Install the pin for the rod end of boom cylinder (4). Install the plate, the spacer and the shims. Install bolts (3).
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Attach a suitable lifting device to guard (1). The weight of guard (1) is approximately 52 kg (115 lb).
Install guard (1) and bolts (2).