Toro Groundsmaster 328-D, Service Manual

Page: 244 / 402

4. Grasp the port cover assembly (four plates bonded
together) and lift it from the unit. Remove and discard
the four o-rings and seal ring (Fig. 29).
Figure 29
5. Remove the loosened plug and o-ring assembly from
the port cover. Be ready to catch the steel check ball as
it falls from its cavity (Fig. 30). Discard the o-ring.
6. Inspect the port cover for port fitting sealing surface
scratches and thread damage. Replace the port cover
if it is damaged.
NOTE: Be prepared to catch three springs which may
become disengaged when removing the port manifold.
7. Carefully lift the port manifold (3 plates bonded to-
gether) from the unit (Fig. 31).
8. Remove the three springs from the port manifold.
NOTE: The unit has two different length spring sets. The
set you have just removed from the port manifold are
3/4 in. (19 mm) long. Keep this set of three springs
separate from the next set of three springs to be re-
moved.
9. Inspect the springs for bent or distorted coils. If a
spring is broken or deformed, all six springs in the unit
should be replaced.
10. Inspect the ground surfaces of the port manifold. You
should notice a “normal” polished pattern due to the
rotation of the valve plate and hex drive assembly. All
edges should be sharp and free of nicks and burrs. The
surfaces of the port manifold should be free of scratches
or scoring.
NOTE: Scoring is indicated by fine scratches or
grooves. If these scratches can be detected by feel,
finger nail, or lead pencil, the manifold should be re-
placed.
IMPORTANT: Many components in the unit have
finely ground surfaces. Be careful not nick or
scratch these surfaces.
Figure 30
Figure 31
®
Repairs Page 8 - 24 Groundsmaster 300 Series