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Reelmaster 3550−D Hydraulic SystemPage 4 − 105
Backlap Spool (Fig. 68)
1. To remove backlap spool from manifold:
A. Remove backlap switch from manifold before re-
moving backlap spool. Remove ball from manifold
port after switch is removed. Remove and discard
O−ring from switch.
B. Remove lower retaining ring from backlap spool.
Raise 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 manifold. Remove O−
rings and back−up ring from spool.
E. Discard all 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. To install 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 manifold port until
lower O−ring and back−up ring groove is exposed on
bottom of manifold. Install lower O−ring and back−up
ring to spool. Apply a light coating of grease to O−
ring.
C. Install lower retaining ring to spool.
D. Carefully raise backlap spool until upper retaining
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 spring pins in
manifold. Apply Loctite 603 Retaining Compound (or
equivalent) to threads on handle and install handle
into spool. Torque handle 10 ft−lb (13.5 N−m).
F. Place ball in manifold port SW (backlap switch).
Install new O−ring onto backlap switch. Thread
backlap switch into port and torque 20 ft−lb (27
N−m).
Hydraulic
System