HYDRAULIC SYSTEM GRT8100 SERVICE MANUAL
2-68
Published 3/26/2018, Control # 596-05
HYDRAULIC BRAKE ACCUMULATOR
Description
The hydraulic brake accumulators are located inside the
superstructure side plates near the turntable bearing
(Figure 2-18). The purpose of the two accumulators is to
provide stored energy to actuate the service brake circuits.
Each accumulator has a oil volume of 2.83 l (173 in
3
) and is
pre-charge with high purity nitrogen to (1500 psi ±50). The
dual accumulator charge valve regulates flow to the
hydraulic accumulators to provide fully powered,
independently separate, primary (front) and secondary
(rear), service brake circuits.
Maintenance
Removal
1. With engine shut down, remove hydraulic pressure in
accumulators by depressing the service brake pedal
several times.
2. Tag and disconnect hydraulic hose from accumulator.
Cap or plug line and port.
3. Remove two nuts securing each clamp half. Remove
each clamp half and accumulator from turntable.
Installation
1. Position accumulator in the clamps. Secure with
removable clamp halves and nuts.
2. Connect hydraulic hose to port on accumulator as
tagged during removal.
3. Pre-charge accumulator. Refer to Pre-charging the
Accumulators, page 2-34.
4. Start engine. Check accumulator and hoses for leaks.
Make repairs as needed.
5. Depress brake pedal several times. Verify brakes work
properly.
Servicing
Check pre-charge nitrogen pressure every 200 hours or
once a month, whichever comes first. Refer to Checking the
Service Brake Accumulators Pre-charge, page 2-33.
To Next Page
Loading...
Need help?
General
