GUARD AS 4677305 - Caterpillar

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.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Illustration 2 g01201942
Remove bolts (1). Reposition plate assembly (2) and disconnect hose assembly (3). Remove plate assembly (2).
Illustration 3 g01224827
Remove clamp (5) and disconnect hose assemblies (4).
Illustration 4 g01224828
Attach a suitable lifting device to cylinder (8). The weight of angle cylinder (8) is approximately 68 kg (150 lb). Remove pin (6) and use Tooling (A) to remove pin (7). Remove angle cylinder (8).Installation Procedure
Install angle cylinder (8) in the reverse order of removal.
Apply Tooling (H) to the threads of the bolts that hold pin (7).
After angle cylinder (8) is installed.
Check the hydraulic oil tank level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check" for the correct procedure.
Cycle the cylinder three times, getting as close to the end of stroke without going to full stroke.
Cycle the cylinder another time going to full stroke slowly. Do not hold in stall.
After cycling the cylinder, check the hydraulic oil level again.Disassembly and Assembly Information
Table 3
Required Tools
Tool Part Number Part Description Qty
B 1P-0808 Multipurpose Grease 1
C 1P-0510 Driver Gp 1
D 195-4609 Seal Pick 1
E - Loctite 648 -
F 136-1452 Retaining Ring Pliers As 1
G 9U-7868 Spanner Wrench(1) 1
455-7436 Spanner Wrench 1
(1) Refer to Tool Operating Manual, NEHS0629, "Using the 9U-7868 and 9U-7869 Spanner Wrench to Remove and install Threaded Gland Cylinder Heads".
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 5 g01204492 (1) Lubricate the sealing lip with a thin covering of the lubricant that is being sealed. (2) Apply Tooling (E) to the seal groove prior to assembling the wiper seal. (3) Torque for nut ... 900 50 N m (664 37 lb ft) (4) Torque for piston ... 1300 65 N m (960 48 lb ft) (5) Apply Tooling (B) to the threads. Torque for head ... 600 130 N m (442 95 lb ft) (6) Use Tooling (C) to remove retaining rings.