(b) Loosen bolt through split hub of
gear inspection and repair, see paragraph 2-8.
f.
Assembly, Preparatory to Installations on the
secondary hoist clutch driver wedge open, and remove
Machine.
entire clutch assembly and key.
(1) General Assembly instructions are
Note. The entire secondary hoist clutch comes
presented in two sections:
Assembly from the left,
out from housing m a unit on the driver and may be
assembly from the right. Either sequence may be taken
dissembled later.
first.
(c) Smooth shaft with fine emery cloth
(2) Assembly operation from the left
around keyway, use fine file on heavy burrs, clean, oil, and
inspect entire shaft to right.
(a) Press on left shaft bearing and set its
(d) Pull secondary hoist friction clutch
shield side solidly against shoulder on shaft. Bearing
housing and sprocket. Right bearing comes along in place.
housing is assembled later from right.
Use pinch bar and block of wood to bump unit along from
(b) Place the key for the hoist gear in
left of sprocket. Take care to avoid damage to left bearing
keyway. Press the hoist gear in place (long hub next to
shield.
bearing) on the shaft using a 20 to 30 ton press.
(e) After unit is off from the shaft,
(c) Replace right swing clutch bearing.
remove outer (right) bearing by tapping out from left through
(d) Replace swing gear on housing using
hub of housing.
a 20to 30-ton press (long hub away from housing).
(f) Sprocket may be pulled off from
(e) Place housing on shaft and tap into
sleeve end of housing by using 20-to 30-ton press.
position over right bearing.
(g) Tap off inner (left) clutch bearing and
(f) Insert left swing clutch bearing and
spacer.
tap into place with shield outermost.
(h) Remove rear drum by driving from
left; left drum bearing usually remains in place.
(i) Tap right bearing out of drum after
drum is off from shaft; swing round wood handle or bar.
(j) Tap left drum bearing off from shaft.
(k) Slide off clutch assembly by
loosening hub bolt and wedging hub open. If driver comes
hard, remove pins from toggle links and slide shafter collar
and sleeve to left. Bump and pry directly against driver hub.
(l) Remove key. Smooth shaft with
emery paper and fine file as in (c) above.
(m) Tap left bearing housing free of
bearing and slide off to right, leaving bearing to be removed
to left.
(n) This
completes
disassembly
operations to the right.
(3) Disassembly operation to the left.
(a) Remove clutch driver and entire
clutch assembly from housing by loosening driver bolt and
wedging split hub open. Remove driver key.
(b) Smooth shaft around keyway with
emery cloth and fine file, inspect, clean, and oil entire left
shaft.
(c) Pull swing-and-propel friction clutch
housing with the swing gear in place using a pinch bar and
Figure 4-12. Rear drum shaft assembly (left side).
wood block to bump it along. Left bearing will come with
housing.
Note. The three bearings mentioned in (a), (d),
(d) Remove right bearing.
and (g) are oil lubricated from the gear cue and should
(e) If desired, the swing gear may be
NOT be peeked with grease. Dip each in OE, oil engine
removed from housing but a 20-to 30-ton capacity press
before assembly.
required.
(g) Place driver key and replace clutch
(f) The hoist gear and left shaft bearing
assembly using wedge to hold split hub open. Remove
are now the only remaining parts on the shaft. The hoist
wedge and tighten driver bolt (driver key must not protrude
gear is a press fit on the shaft and a 20-to 30-ton press is
from driver hub).
required to pull it.
(h) This completes assembly operations
(g) The left bearing can now be removed
from the left.
d to the left with the press.
(h) This completes disassembly to the,
e. Inspection and Repair. See front drum shaft
inspection and repair, paragraph 4-10. For bearing and
4-16
