Transmission Charge Relief Valve - Toro Groundsmaster 300 Series Service Manual

Transmission Charge Relief Valve (Fig. 19)
1 . Place a drain pan below the charge relief valve.
2. Remove the charge relief plug and O-ring from the
side of the pump housing. Slide the shim pack, spring
and ball or cone out of the housing. Some oil may flow
out of the transmission.
NOTE: Count the shims when they are removed. The
same number of shims must be installed when assem-
bling the parts. Do not interchange charge relief shims
with implement relief shims.
3. Remove the O-ring from the plug.
4. Inspect the plug and pump housing for stripped
threads. Replace any part that is damaged. Also check
the seat inside the pump housing for damage and
foreign material.
5. Check the spring for damage and correct specifica-
tions. Replace the spring if is condition is doubtful.
Spring specifications are listed in the table below.
Charge Relief Spring Specifications
Free Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.051 in.
Number of Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Outside Diameter . . . . . . . . . . . . . . . . . 0.249 - 0.251 in.
Pounds per Inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.8
6. To install the charge relief valve, slide a new O-ring
onto the charge relief plug.
7. In sequence, insert the check ball or cone, spring, and
shim pack into the pump housing. Install the plug to
retain the parts in place.
8. Since some oil drained out of the transmission when
the charge relief valve was removed,check the oil level
in the axle housing. Start the engine and let it run for
about one or two minutes. Then turn the engine off and
check the oil level in axle housing again. Also inspect
the charge relief plug area for oil leaks.
Repairs Page 5 - 30
Figure 19
®
Groundsmaster 300 Series