Greensmaster 3250--D Hydraulic SystemPage 4 -- 9 3
Mow/Backlap Spool (Fig. 64)
1. Make sure manifold is clean before removing the
mow/backlap spool.
2. Remove mow/backlap spool f rom manifold:
A. Remove backlap s witch 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 downuntil 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 manifold. Remove O--
rings and back--up ring from spool.
E. Discard removed O--rings and back--up rings.
3. Visuallyinspectthe spool and manifold port for dam-
age to the sealing surfaces and contamination.
4. 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--upr inggrooveisexposedon
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/backlapspooluntil upperre-
taining ring groove on spool is exposed on top of
manifold. Install upper retaining ring.
E. If handle wasremovedfromspool,position spool
so handle location of spool is between stop pins in
manifold.ApplyLoctite603RetainingCompound(or
equivalent) to threads on handle and install handle
into spool.
F. Place ball and dowel pin in backlap switch man-
ifold port. Install new O--ring onto backlap switch.
Threadbacklapswitchintoportandtorqueswitch20
ft--lb (27 N--m).
1. Retaining ring
2. O--ring
3. Back--up ring
4. O--ring
5. Spool handle
6. Rotary spool
2
3
4
5
6
Loctite 603
1
1
4
3
Figure 64
Hydraulic
System
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