Check And High Pressure Relief Valves - Toro Reelmaster 5100-D Service Manual

Check and High Pressure Relief Valves

1. Park the machine on a level surface, lower cutting
units, engage parking brake and stop the engine.
2. Remove the check/high pressure relief valve hex plug
(Fig 32).
3. Remove the valve cartridge assembly. Inspect the
valve and mating seat in the housing for damage or
foreign material. It will be necessary to replace the
center section if the seat is damaged.
IMPORTANT: The relief valves are factory set and
should not be tampered with, except to replace the
entire valve cartridge.
4. The valve cartridge is retained in the special plug by
a circlip. The check valve spring may be removed from
the special plug by pulling out at a slight angle. When
reassembling, install the check valve spring into the
special plug with its larger diameter toward the plug, and
snap the valve cartridge into position in the plug.
NOTE: The forward and reverse valves are different.
The seating surface of the "reverse" check/high pres­
sure relief valve has a machined groove in it (Fig. 32).
Installing the "reverse" check/high pressure relief valve
in the wrong port may cause performance problems.
5. Reinstall the valve cartridges with o-rings into the
housing and tighten the plugs to a torque of 30 to 50
ft-lb.
6. Before starting the engine check the oil level in the
differential housing and add the correct oil as necessary.
Start the engine and let it run for one to two minutes,
then turn the engine off and check the oil level again.
Check the transmission for leaks.
Transmission Repairs
1. Forward check/high pressure relief valve
2. Reverse check/high pressure relief valve
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1
Machined groove
(reverse on y)
2
Figure 32
®
Reelmaster
l
5100-D