GEAR-RING 6Y4427 - Caterpillar

Install Tooling (A). Remove bolt (5).
Use Tooling (A) and a suitable lifting device to remove pin assembly (6). The weight of Tooling (A) and pin assembly (6) is approximately 50 kg (110 lb).
Remove stick cylinder (1).Installation Procedure
Install stick cylinder (1) in the reverse order of removal.
Illustration 3 g02149761
Apply Tooling (C) to pin assembly (6). Use Tooling (B) to install pin assembly (6).
Illustration 4 g02149762
Apply Tooling (C) to pin assembly (2). Use Tooling (B) to install pin assembly (2).
Fill the hydraulic oil tank. Refer to Operation and Maintenance Manual, "Hydraulic Oil Level - Check".Disassembly and Assembly Information
Table 2
Required Tools
Tool Part Number Part Description Qty
D 125-0079 Hydraulic Cylinder Repair Stand Gp 1
152-4249 Hydraulic Cylinder Repair Stand Gp(1) 1
E 350-7768 Electric Hydraulic Pump Gp (115v) 1
350-7769 Electric Hydraulic Pump Gp (230v) 1
6V-3175 Double Acting Cylinder 1
6V-4035 Sleeve 1
9U-6832 Nut 1
4K-0684 Hard Washer 1
9C-9634 Puller Stud 1
F 1P-0520 Driver Gp 1
G - Loctite 271 -
H - Loctite 609 -
(1) CE Compliant
When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.
Do not use threaded rods that have not been hardened as tooling with hydraulic cylinders. The maximum rated tonnage should be stamped on one end of the puller studs. Do not use threaded rods that have not been stamped with the rated tonnage.
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 g06013109 (1) Use Tooling (E) to remove sleeve bearing (1). Install sleeve bearing (1) to a depth of 10.0 0.5 mm (0.39 0.02 inch). (1A) Tighten bolts (1A) to a torque of 300 30 N m (221 22 lb ft). Then, turn bolts (1A) and additional 30 5 degrees. (2) Lubricate the threads of the rod with lubricant that is being sealed. Tighten piston (2) to a torque of 15500 800 N m (11430 590 lb ft). (3) Use Tooling (E) to remove sleeve bearing (3). Install sleeve bearing (3) to a depth of 9.85 0.03 mm (0.388 0.001 inch). (4) The slit of the ring must turn in the direction of the piston. (5) The outer diameter can be at a maximum diameter of 85.0 mm (3.35 inch) after being assembled. (6) The stop must have a free linear movement of 0.50 0.26 mm (0.020 0.010 inch) after being assembled. (7) Apply Tooling (H) to the wiper seal groove prior