Toro Groundsmaster 4500-D Series Service Manual page 237

Deck Control Manifold Service (GM4500-D) (continued)
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
g308894
1. Manifold body
2. Zero leak plug (#4)
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
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 pin
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.
For solenoid and control valve service procedures, see
Service (GM4500-D) (page
cartridge valve and plug installation torque.
Note: A pilot piston (item 6) is placed beneath each of the relief valves in deck
control manifold ports RV8 and RV9. If a relief valve is removed from the
manifold, make sure to remove pilot piston and label its position for assembly
purposes. When installing the pilot piston in the manifold, make sure that the
pilot piston slides fully into the port before installing relief valve.
Figure 127
3. Zero leak plug (#6)
5–134). Refer to Figure 126
Page 5–135
Deck Control Manifold
and Figure 127
Hydraulic System: Service and Repairs
for