Manitowoc Grove RT540E Service Maintenance Manual

Published 4-20-2015, Control # 502-01 2-39
RT540E SERVICE MANUAL HYDRAULIC SYSTEM
2
GROVE
HYDRAULIC ACCUMULATOR SERVICE
BRAKE
Description
The service brake hydraulic accumulators are located on the
outside of the left superstructure side plate behind the cab.
The purpose of each accumulator is to provide stored
energy, an oil volume of 1.23 l (75.1 cu in) at a maximum
pressure of 27,579 kPa/275 bar (4000 psi), to actuate the
service brake circuits. 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.
Each accumulator has two chambers divided by a piston.
One side is pre-charged to 5,515.8 kPa/55.1 bar (800 psi)
with high purity nitrogen. This maintains a constant pressure
in the other chamber which is connected to the modulating
brake valve. After the accumulators are fully charged, they
will provide the necessary brake system flow and pressure to
actuate the brakes.
The accumulator consists of a tube, piston, seals, gas
charging valve, and a gas valve guard.
Maintenance
Removal
1. With the engine shutdown, deplete the hydraulic
pressure in the accumulators by depressing the service
brake pedal several times.
2. Tag and disconnect the hydraulic hose from the
accumulator. Cap or plug the line and port.
3. Remove the two nuts securing each clamp half. Remove
the each clamp half and accumulator from the turntable.
Installation
1. Position the accumulator in the clamps and secure with
the removable clamp halves and nuts.
2. Connect the hydraulic hose to the port on the
accumulator as tagged during removal.
3. Pre-charge the accumulator. Refer to paragraph titled
Pre-Charging Accumulator in Sub-Section titled
Pressure Setting Procedures.
4. Start the engine and check accumulator and hoses for
leaks. Make repairs as needed.
5. Depress the brake pedal several times, make several
turns with the steering wheel, and swing the
superstructure left and right. Verify the brakes, swing,
and front steering work properly.
Servicing
The pre-charge nitrogen pressure should be checked every
200 hours or once a month, whichever comes first. Refer to
Pressure Setting Procedures in this section.
Reference Only

Manitowoc Grove RT540E Specifications

General

Brand	Manitowoc
Model	Grove RT540E
Category	Construction Equipment
Language	English