CASE AS 9W5102 - Caterpillar

Removal Procedure
Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     FT-2674     Vacuum Cap     1    
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Illustration 1 g01914313
Install Tooling (A) to the hydraulic tank. Apply approximately 276 kPa (40 psi) to 414 kPa (60 psi).
Illustration 2 g01914354
Remove cover (1) .
Illustration 3 g01914513
Remove relief valve (2) .Installation Procedure
Illustration 4 g01914626
Install relief valve (2) .
Illustration 5 g01914630
Install cover (1) .
Illustration 6 g01914651
Remove Tooling (A) .