SUPPRESSION AR-SOUND 2729228 - Caterpillar

Introduction
The accumulator stores pilot pressure oil for use at the main control valves. During multiple operations, the pilot system will demand more oil in order to maintain valve operation. The accumulator provides pilot pressure oil to the pilot system, when the pilot pump flow is inadequate. Inadequate flow will cause sluggish implement control.Required Tools
Illustration 1 g01089423
Tooling (A)
Illustration 2 g01784963
This tooling group is used to test the pressure in the pilot manifold.
Table 2
Tool    Item    Qty    Part Number    Description    
A     A1     1     8T-0856     Pressure Gauge
(0 to 6,000 kPa (0 to 870 psi))    
A2 1     6V-3989     Fitting    
A3 2     6V-4143     Quick Connect Coupler    
A4 1     177-7860     Hose As    
F     F1     1     6V-3965     Fitting    
F2 1     3J-1907     O-Ring Seal    Test Procedure
Preliminary Test
Start the engine. Place the hydraulic lockout lever in the UNLOCKED position.
Position the implements 1 m (3.3 ft) from the ground.
Shut off the engine by turning the start