Greensmaster 3300/3400Hydraulic System Page 5 -- 90
Mow/Backlap Spool (Fig. 67)
1. To remove mow/backlap spool from manifold:
A. Remove backlapswitchfrom manifoldbefore re-
moving mow/backlap spool (Fig. 65). Remove shim
and ball from manifold port after switch is removed.
Remove and discard O--ring from switch.
B. Remove lower r etaining ring from mow/backlap
spool. Raise mow/backlap spool to allow access to
retaining ring on upper end of spool. Remove upper
retaining ring.
C. Pushspool downuntillowerO--ringandback-- up
ring are exposed on bottom of manifold. Remove
lower O--ring and back--up ring from spool.
D. Pull spool up and out of manifold. Remove O--
rings and back--up ring from spool.
E. Discard removed O--rings and back--up rings.
2. Visuallyinspectthespoolandmanifoldportfordam-
age to the sealing surfaces and contamination.
3. To install mow/backlap spool into manifold:
A. Install O--rings and back--up ring to upper
grooves on spool. Apply a light coating of grease to
O--rings.
B. Carefullypushspooldownintomanifoldportuntil
lowerO--ringandback--upringgrooveisexposedon
bottomofmanifold.InstalllowerO--ringandback--up
ring to spool. Apply a light coating of grease to O--
ring.
C. Install lower retaining ring to spool.
D. Carefullyraisemow/backlapspooluntilupperre-
taining ring groove on spool is exposed on top of
manifold. Install upper retaining ring.
E. Ifhandlewas removedfromspool,positionspool
so handlelocation of spoolis betweenspringpins in
manifold.ApplyLoctite603RetainingCompound(or
equivalent) to threads on handle and install handle
into spool. Torque handle 10 ft--lb (13.5 N--m).
F. Placeballand shiminmanifoldport SW(backlap
switch). Install new O--ring onto backlap switch.
Thread backlap switch into port and torque 20 ft--lb
(27 N--m).
1. Retaining ring
2. O--ring
3. Back--up ring
4. Rotary spool
5. Spool handle
Figure 67
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Loctite 603
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