Manitowoc Grove GRT880 Service Manual

2-53
GROVE
GRT880 SERVICE MANUAL HYDRAULIC SYSTEM
2
Published 10/19/2017, Control # 618-00
Function Check - Pilot Supply and Telescope Fill
Tube Valve
1. Start the engine.
2. Try to telescope the boom in and out, lower and raise the
boom, and lower and raise the hoist rope. Verify none of
these functions work.
3. Enable all crane functions using the crane function
switch.
4. Verify the following crane functions operate properly:
a. Telescope in and out
b. Boom raise and lower
c. Hoist up and down
d. Turntable swing left and right
5. Check for leaks. Make repairs as needed.
1 Drain Port Outlet (DR)
2 Gauge Port (GP1)
3 Pressure Regulating Valve - Swing Brake
4 Control Valve - Swing Brake Release
5 Pressure Reducing Valve - 280 psi
6 Pressure Reducing Valve - 600 psi
7 Control Valve - Pilot Supply
8
Pressure Regulating Valve - Fill Tube Pressure
Regulating
9 Inlet Port (SYS)
10 Pressure Reducing Valve - 3250 psi
11 Check Valve
12 Gauge Port (GP6)
13 Priority Valve - Steering
14 Load Sense Port (3)
15 Load Sense Port (LS)
16 Check Valve
17 Load Sense (5)
18 Drain Port Inlet (2)
19 Check Valve
20 Pilot Supply Port (PS1)
21 Outlet Port (CB)
FIGURE 2-26
Accessory Manifold Valve
8804-91
2
1
9
10
11
7
5
6
3
4
8
14
13
16
17
18
20
21
19
15
8804-94
12
Reference Only

Manitowoc Grove GRT880 Specifications

General

Brand	Manitowoc
Model	Grove GRT880
Category	Construction Equipment
Language	English