SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
5-66
31215031
Figure 5-106. Main Control Valve - 4WS
2
3
6*
7
8
1
4
5
10
11*
12**
14*
13*
14*
15
16*
17
18
19
20
21*
22
23
24***
1.
Rear Steer Left (4-Wheel Steer Only)
10.
Tower Lift Down
19.
Direct Control Dump Valve
2.
Front Steer Left
11.
Rear Steer Pressure Relief (4-Wheel Steer Only)
20.
Tower Telescope Out
3.
Front Steer Right
12.
Rear Steer Right (4-Wheel Steer Only)
21.
Main Upper Boom Pressure Relief
4.
Swing Right
13.
Rear Steer Pressure Relief (4-Wheel Steer Only)
22.
Main Lift Up
5.
Main Lift Down
14.
Front Steer Pressure Relief
23.
Swing Left
6.
Main Upper Boom Pressure Relief Valve
15.
Tower Lift Up
24.
Front Steer Pressure Relief
7.
Tower Telescope In
16.
Main Upper Boom Pressure Relief
25.
Socket Head Capscrew
8.
Main Telescope In
17.
Flow Control
26.
Pilot Operated Check Valve (On back - Not Shown)
9.
Test Port MP
18.
Main Telescope Out
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