BLADE AR-PWR ANGLE & TILT 2552381 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 311-1362 Vacuum Gauge Gp 1 Start By:
Release the hydraulic system pressure.
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 g02138430
Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.
Illustration 2 g02243533
Loosen nut (3). Loosen seat (4) to release the pressure in the boom cylinders.
Disconnect hose assemblies (1). Remove manual valve (boom lowering) (2).
Illustration 3 g02243574
Remove plug (5) and ball (10).
Remove nut (3), seat (4), O-ring seal (7), and O-ring seal (6).
Remove plug (8) and O-ring seal (9). Repeat for the remaining plugs.Installation Procedure
Install manual valve (boom lowering) (2) in the reverse order of removal.
Tighten plug (8) to a torque of 9 1 N m (80 9 lb in).
Tighten plug (5) to a torque of 48 5 N m (35 4 lb ft).
Tighten seat (4) to a torque of 2.25 0.25 N m (20 2 lb in).
Tighten nut (3) to a torque of 4.0 0.5 N m (35 4 lb in).
Check the hydraulic oil level. Refer to , "Hydraulic System Oil Level - Check".