BOLT 1015233 - Caterpillar

Fully extend the bucket cylinder. Fully extend the stick cylinder. Lower the boom until the stick assembly is in contact with the ground.
Release the pressure in the hydraulic system.
Illustration 1 g02435979
Install Tooling (A) onto the hydraulic tank. Attach an air supply hose onto Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.
Illustration 2 g02437966
Disconnect hose assembly (1). Remove bolts (2) and plate (3)
Illustration 3 g02438001
Install Tooling (B) in pin (5). Attach a suitable lifting device to boom cylinder (4). Use a hammer to drive pin (5) out of boom cylinder (4). The weight of boom cylinder (4) is approximately 236 kg (520 lb).
Illustration 4 g02438936
Lower boom cylinder (4) .
Illustration 5 g02440020
Disconnect hoses (5) .
Illustration 6 g02440119
Remove bolt (6) and washer (7). Remove pin (8) .Installation Procedure
Install boom cylinder (4) in the reverse order of removal.
Lubricate pin assembly (10) with Tooling (C) .
Tighten nut (6) to a torque of 4 N m (35 lb in).
Tighten seat (7) to a torque of 2 N m (18 lb in).
Lubricate pin (5) with Tooling (C) .Disassembly and Assembly
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
D     127-4904     Hydraulic Cylinder Repair Stand Gp     1    
E     -     Locitie 609     -    
F     1P-0808     Multipurpose Grease     -    
G     -     Locitie 271     -    
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.
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 g02436053
(1) Lubricate the threads and the face of piston (19). Tighten piston (19) to a torque of 8900 445 N m (6564 328 lb ft). (2) Apply Tooling (G) to the threads of setscrews (20). Tighten setscrews (20) to a torque of 56.9 10.1 N m (42 7.4 lb ft). (3) Apply Tooling (F) to inner diameter and the outer diameter of all seals. (4) The slit of ring must be in the direction of piston. (5) Lubricate the sealing lip with lubricant that is being sealed. (6) Apply Tooling (E) to the wiper seal groove prior to assembly. Lubricate the sealing lip with lubricant that is being sealed.