Hydraulic Control Manifold Service: Deck Drive (Gm 4700--D) - Toro Groundsmaster 4500-D Service Manual

Hydraulic Control Manifold Service: Deck Drive (GM 4700- -D)
4 to 5 ft- -lb
(5.4 to 6.8 N- -m)
198 in- -lb
(22.4 N- -m)
25 ft- -lb
(33.9 N- -m)
120 in- -lb
(13.6 N- -m)
12
1. Manifold body
2. Proportional relief solenoid (PRV2)
3. Solenoid valve (SV2)
4. Logic valve (LC1 and LC2)
NOTE: The ports on the manifold are marked for easy
identification of components. Example: P1 is the gear
pump connection port. (See Hydraulic Schematics to
identify the function of the hydraulic lines and cartridge
valves at each port location).
For solenoid and control valve service procedures, see
Hydraulic Control Manifold Service: 2 Wheel/4 Wheel
Drive Control in this section. Refer to Figure 72 for car-
tridge valve installation torque.
Groundsmaster 4500--D/4700--D
8
20 ft- -lb
(27.1 N- -m)
8
5
7
9
2
6
1
Figure 72
5. Relief valve (RV8 and RV9)
6. Pilot piston
7. Solenoid coil
8. Nut
Page 4 - - 81
20 ft- -lb
7
(27.1 N- -m)
5
3
4
9
10
11
9. Zero leak plug (#6)
10. Zero leak plug (#12)
11. Plug (SAE #4)
12. Zero leak plug (#4)
NOTE: The Groundsmaster 4700--D deck drive man-
ifold uses several zero leak plugs. These plugs have a
tapered sealing surface on the plug head that is de-
signed to resist vibration induced 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 socket
head of the plug.
Hydraulic System (Rev. A)
25 ft- -lb
(33.9 N- -m)
25 ft- -lb
(33.9 N- -m)
198 in- -lb
(22.4 N- -m)
9
75 ft- -lb
(101.7 N- -m)
9
198 in- -lb
(22.4 N- -m)
165 in- -lb
(18.6 N- -m)