Deck Control Manifold Service (GM 4500--D)
5
(6.8
ft--lb
N--m)
7
2
(27.1
0 ft--lb
N--m)
3
4
3
25
(33.9
ft--lb
N--m)
2
2
25
ft--lb
(33.9
N--m)
5
20
(27.1
ft--lb
N--m)
4
6
25
(33.9
ft--lb
N--m)
5
25
(33.9
ft--lb
N--m)
8
6
UP
1
25
ft--lb
(33.9
N--m)
8
50
(68
ft--lb
N--m)
9
Figure 81
1.
2.
3.
Manifold body
Proportional relief (PRV1 & PRV2)
Solenoid coil
4.
5.
6.
Relief valve (RV8 & RV9)
Logic valve (LC1 & LC2)
Pilot piston
7.
8.
9.
Nut
Zero leak plug (#6)
Zero leak plug (#8)
NOTE: The ports on the manifold are marked for easy
identification of components (e.g. P1 is a gear pump
connection port and PRV1 is the location for a propor-
tional relief valve). See Hydraulic Schematics in Chap-
ter 9 -- Foldout Drawings to identify the function of the
hydraulic lines and cartridge valves at each port loca-
tion.
NOTE: The deck control manifold uses several zero
leak plugs. These plugs have a tapered sealing surface
on the plug head that is designed to resist vibration in-
duced plug loosening. The zero leak plugs also have an
O--ring as a secondary seal. If zero leak plug removal is
necessary, lightly rap the plug head using a pin punch
andhammerbeforeusinganallenwrenchtoremovethe
plug:the impactwill allowplug removal with lesschance
of damage to the head of the plug.
Hydraulic System
Page 4 -- 98
Groundsmaster 4500--D/4700--D
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