HYDRAULIC SYSTEM GRT8100 SERVICE MANUAL
2-58
Published 3/26/2018, Control # 596-05
Functional Check
1. Cycle an outrigger cylinder several times. Verify the
cylinder extends and retracts properly.
2. Rear steer the crane to the left and to the right several
times. Verify the crane steers properly in both directions.
3. Ensure the axle lockout function operates properly by
performing the procedures under Axle Oscillation
Lockouts Operation in section 3 of the Operator Manual.
14
15
8
2
4
1
6
7
18
19
5
16
17
20
21
28
22
26
27
29
1 Pressure Reducing Valve - 2750 psi
2 Control Valve - Rear Steer
3 Check Disc Valve Assembly
4 Pressure Reducing Valve - Axle Lockout
5 Control Valve - Axle Lockout
6 Control Valve - Axle Lockout
7 Gauge Port (G3)
8 Drain Port (DR2)
9Valve
10 Control Valve - Outriggers Extend and Retract
11 Tank Port (T)
12 Orifice
13 Check Valve
14 Work Port - Fan Return (B3)
15 Work Port - Fan Supply (A3)
16 Work Port - Rear Cylinder Left Turn (RSB)
17 Work Port - Rear Cylinder Right Turn (RSA)
18 Load Sense Port (LS1)
19 Supply Port (P)
20 Load Sense Port (LS0)
21 Control Valve - Fan
22 Control Valve - Outriggers Extend and Retract
23 Orifice
24 Orifice
25 Double Check Valve - Rear Steer
26 Control Valve - Load Sense Dump
27 Check Valve
28 Pressure Compensator Valve - Fan
29 Check Valve
30 Orifice
Carrier Combination Valve
3
25
FIGURE 2-29
8804-98
8804-99
9
13
23
24
30
10
12
11
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