Toro Groundsmaster 4500-D Series Service Manual page 239

Deck Control Manifold Service (GM4700-D) (continued)
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
g308898
1. Manifold body
2. Zero leak plug (#6)
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
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.
A pilot piston (item 6) is placed beneath each of the relief valves in
deck control manifold ports RV8, RV9, RV10 and RV11. 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 129
3. Zero leak plug (#4)
5–134). Refer to Figure 128
IMPORTANT
Page 5–137
Deck Control Manifold
and Figure 129
Hydraulic System: Service and Repairs
for