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Groundsmaster 4500--D/4700--DHydraulic System Page 4 -- 120
Lift Control Manifold Service (GM 4500--D)
1. Manifold body
2. Proportional relief valve (port TS)
3. Solenoid valve (port S6)
4. Solenoid coil (2 used)
5. Check valve (port CV)
6. Orifice (0.080)
7. Zero leak plug (#4)
8. Nut
9. Straight fitting
10. O--ring
11. Nut
12. O--ring
13. Relief valve (port RV)
14. Solenoid coil
15. Nut
16. Solenoid valve (port S5)
Figure 100
13
7
14
4
6
10
3
11
12
2
1
5
16
15
9
8
7
4
5 ft--lb
(6.8 N--m)
5 ft--lb
(6.8 N--m)
20 ft--lb
(27.1 N--m)
20 ft--lb
(27.1 N--m)
25 ft--lb
(33.9 N--m)
20 ft--lb
(27.1 N--m)
20 ft--lb
(27.1 N--m)
5 ft--lb
(6.8 N--m)
25 ft--lb
(33.9 N--m)
25 ft--lb
(33.9 N--m)
UP
NOTE: The ports on the manifold are marked for easy
identification of components (e.g. P is the supply con-
nectionport andR7is thelocationfor thelift reliefvalve).
SeeHydraulic Schematicsin Chapter9 -- FoldoutDraw-
ingstoidentify the functionofthehydrauliclines andcar-
tridge valves at each port location.
NOTE: The lift control manifold includes 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 alsohave an
O--ring as a secondary seal. If zero leak plug removal is
necessary, lightly rap the plug head using a punch and
hammer before using an allen wrench to remove the
plug:the impactwill allowplug removalwith lesschance
of damage to the socket head of the plug.