Hydraulic Control Manifold Service: Power Down and Traction Assist (GM 4700--D)
25
(33.9
ft--lb
N--m)
2
3
20 ft--lb
(27.1
N--m)
25
ft--lb
(33.9
N--m)
3
20 ft--lb
4
20 ft--lb
(27.1
N--m)
(27.1 N--m)
6
7
5
20
(27.1
ft--lb
N--m)
7
1
7
Figure 68
1.
2.
3.
Manifold body
Traction assist valve (RV2: port 2)
Power down valve (deck 6)
4.
5.
Counterbalance valve (RV1: port 4)
Traction pressure sensing valve
6.
7.
8.
Lift relief valve (RV7: port 7)
Expanding plug (not serviced)
Power down valve (deck 7)
(PD3: port 5)
NOTE: The ports on the manifold are marked for easy
identification of components. Example: C1 is the con-
nectionportfromtheLHdeckliftcylinderandCHGisthe
charge circuit connection (See Hydraulic Schematics to
identify the function of the hydraulic lines and cartridge
valves at each port).
For cartridge valve service procedures, see Hydraulic
Control Manifold Service: 2 Wheel/4 Wheel Drive Con-
trol in this section. Refer to Figure 68 for cartridge valve
installation torque.
Hydraulic System (Rev. A)
Page 4 -- 76
Groundsmaster 4500--D/4700--D
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