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Greensmaster 3150 Hydraulic SystemPage 4 -- 93
Mow/Backlap Spool (Fig. 69)
1. Remove mow/backlap spool from manifold:
A. Remove backlap switch from manifold before re-
moving mow/backlap spool. Remove dowel pin and
ball from manifold port after switch is removed. Re-
move and discard O--ring from switch.
B. Remove lower retaining 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. Push spool down until lower O--ring and back--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 m anifold. Remove O--
rings and back--up ring from spool.
E. Discard removed O--rings and back--up rings.
2. Visually inspect the spool and manifold port for dam-
age to the sealing surfaces and contamination.
3. 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. Carefully push spool down into man ifold port until
lower O--ring and back--up ring groove is exposed on
bottom of manifold. Install lower O--ring andback--up
ring to spool. Apply a light coating of grease to O--
ring.
C. Install lower retaining ring to spool.
D. Carefully raise mow/backlap spool until upper re-
taining ring groove on spool is exposed on top of
manifold. Install upper retaining ring.
E. If handle was removed from spool, position spool
so handle location of spool is between stop pins in
manifold. Apply Loctite #603 Retaining Compound
(or equivalent) to threads on handle and install han-
dle into spool.
F. Place ball and dowel pin in backlap switch man-
ifold port. 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. O--ring
5. Spool handle
6. Rotary spool
7. Ball
8. Dowel pin
9. O--ring
10. Backlap switch
2
3
4
5
6
Loctite #603
1
1
4
3
Figure 69
9
10
7
8
20 ft--lb
(27 N--m)
Hydraulic
System