Manitowoc Grove GRT8100 Service Manual

HYDRAULIC SYSTEM GRT8100 SERVICE MANUAL
2-34
Published 3/26/2018, Control # 596-05
Pre-charging the Accumulators
1. With the engine off, discharge all of the pressurized oil
stored in the accumulators by depressing the service
brake pedal on the cab floor 10 - 12 times.
2. Remove the gas valve guard and cap on the
accumulator (see Figure 2-12).
3. Ensure that the nitrogen supply bottle is shut off, then
attach the charging valve assembly to it.
4. Before attaching the charging assembly to the
accumulator gas valve, fully turn the gas chuck “T”
handle counter-clockwise until it stops.
5. Close the charging assembly bleed valve. Without
looping or twisting the hose, attach the swivel nut to the
accumulator gas valve and tighten (10 to 15 in-lb).
6. Fully turn the gas chuck “T” handle clockwise which will
depress the core in the gas valve.
7. Slowly open the nitrogen bottle valve and fill the
accumulator. Close the valve when the pre-charge is
1500 to 1550 psi (103 to 107 bar).
8. If the pre-charge is higher than specified in step 7, close
the nitrogen bottle and slowly open the bleed valve on
the charging assembly (see Figure 2-12) until the
pressure is to specification.
9. Remove the charging valve assembly by fully turning the
“T” handle counter-clockwise on the gas chuck and then
opening the bleed valve.
10. Secure the gas valve, loosen the swivel nut and remove
the charging assembly. Replace the gas valve cap and
guard.
FIGURE 2-12
6659-6
Brake Accumulator
1 Gas valve guard
2 Gas valve
3 Accumulator
4 Gauge
5 Gas Chuck
6 Bleed valve
2
1
3
5
6
4

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English