Service Manual

Groundsmaster 4500 --D/4700--DHydraulic System Page 4 -- 112
Deck Control Manifold Service (GM 4700--D)
1. Manifold body
2. Nut (4 used)
3. Zero leak plug (#6)
4. Zero leak plug (#8)
5. Zero leak plug (#4)
6. Proportional relief (PRV2 & PRV2)
7. Relief valve (RV8, RV9, RV10 & RV11)
8. Solenoid valve (SV1 & SV2)
9. Logic valve (LC1, LC2, LC3 & LC4)
10. Solenoid coil (4 used)
11. Pilot piston (4 used)
Figure 95
UP
1
3
4
5
7
9
10
8
2
8
10
10
11
11
7
7
7
9
3
3
3
2
3
6
6
5ft--lb
(6.8 N--m)
20 ft--lb
(27 N--m)
20 ft--lb
(27 N--m)
5ft--lb
(6.8 N--m)
20 ft--lb
(27 N--m)
20 ft--lb
(27 N--m)
20 ft--lb
(27 N--m)
25 ft--lb
(34 N--m)
50 ft--lb
(68 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
25 ft--lb
(34 N--m)
NOTE: The ports on the deck control manifold are
marked for easy identification of components (e.g. P1 is
a gear pump connection port and RV8 is the location for
a relief valve). See Hydraulic Schematics in Chapter 9
-- Foldout Drawings to identify the function of the hydrau-
lic lines and cartridge valves at each port location.
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 punch and
hammer before using an allen wrench to remove the
plug: the impact will allow plug removal with less chance
of damage to the head of the plug.