Manitowoc Grove GRT8100 Service Manual

2-31
GROVE
GRT8100 SERVICE MANUAL HYDRAULIC SYSTEM
2
Published 3/26/2018, Control # 596-05
Checking/Setting the Swing Brake Release
Pressure
1. With the engine off, install pressure check diagnostic
quick disconnect (9999101806) with gauge onto test
nipple at GP3 port of the front steer/swing brake/pilot
supply manifold (see Figure 2-9).
2. Start engine and idle. Turn the swing brake release
pressure reducing valve (see Figure 2-9) clockwise to
increase or counter-clockwise to decrease until a gauge
pressure of 260 to 300 psi (18 to 21 bar) is achieved.
3. Stop engine. Remove the diagnostic coupler.
Checking the Swing Work Pressure
1. With the engine off, install a pressure check diagnostic
coupler (9999101806) with gauge onto the diagnostic
nipple at GP5 port of the superstructure swing
directional valve (see Figure 2-10).
2. Start engine and throttle up to full rpm. Engage the swing
house lock. Slowly actuate the swing right function until
full controller stroke is reached and hold. The pressure
gauge should read 2750 to 3100 psi (190 to 214 bar). If
it does not, the Imax value in the joystick EEPROMs can
be adjusted by raising the Imax to raise the pressure or
reducing the Imax to decrease the pressure. If adjusting
the Imax does not work, contact your Manitowoc
distributor or Manitowoc Crane Care.
3. Repeat step 2 for swing left.
4. Stop engine. Remove the diagnostic coupler.
Superstructure Swing Directional Valve
1GP5 port
8804-67
FIGURE 2-10
1

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English