Lift Valve Repair - Toro Groundsmaster 300 Series Service Manual

Lift Valve Repair (Fig. 36)
1. After removing the control valve assembly, wash the
valve in solvent and dry it thoroughly.
2. Carefully mount the control valve into a vise so that
the control valve mounting pads are against the jaws of
the vise. The control valve spool snap ring (Item 15)
should be facing up.
3. Remove the hex cap plug (Item 1) from the side of
the valve body. Within the valve body, beneath each hex
cap plug, there is a spring (Item 3), ball (Item 4) and cam
pin (Item 6); withdraw these parts.
4. Remove the snap ring (Item 15) from the spool
(Item 8). Carefully push and twist the spool to remove
the spool from the valve body.
5. Use a hooked scribe or thin screwdriver to remove
the O-rings from the inside bore of the valve body (be
careful not to scratch valve bore finish). These O-rings
are the seals for the spool itself. Inspect all components
for wear, paying special attention to the spool itself.
Signs of wear on one side of the spool may indicate a
bent spool. Inspect the spool for flatness and replace if
necessary.
6. After completing reassembly by reversing these pro-
cedures and after having installed new O-rings
and seals.
Figure 36
7. Prior to reassembly coat all the O-rings with oil to ease
assembly. Install the spool into the valve body before
inserting the cam pins, balls, springs and hex plugs.
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Repairs Page 5 - 44 Groundsmaster 300 Series