TM 5-3810-294-34
1) leaks, boot (7) and cup (5) can be replaced. If this
i. Assemble drum (16) on hub (3), using three capscrews
does not repair the leak, the cylinder must be replaced
(17), evenly spaced. Do not install shims (11, 12, and 13) at
as a unit.
this time. Tighten capscrews to 20 to 25 foot-pounds, using a
(3) All items must be inspected for signs of visible
torque wrench, and check shaft end-play with a dial indicating
wear or damage. Items with damaged threads must be
micrometer. Remove drum (16) and install suf-ficient shims
replaced. Compare spring (18) with a-new spring of the
(11, 12, and 13) to provide from 0.003 to 0.005 inch shaft
same type. If the spring is elongated, or has any sign of a
end-play.
crack or deformation, replace the spring.
j. Press seal (14) into the bore of clutch housing (8). Pack
5-41. Reassembly
sealing lips with GAA grease and install the seal with the
a. Install bearing seal (4, fig. 5-10) on hub (3).
spring pointing toward drum (16). Remove sprocket, end
b. Warm inner race of bearing (5) and install it on
plate, and end plate capscrews installed in step h. above.
k. Install drum (16), using capscrews (17). Be sure to use
hub (3). Install outer race of the bearing in housing 18).
Pack bearing (5) inner race with GAA grease.
correct measured amount of shims (11, 12, and 13). Tighten
c. Stand hub (3) on end, large end down.
capscrews (17) to 20 to 25 foot-pounds.
d. Install outer race of bearing (10) in housing (8).
l. Install lock ring (18), making sure the holes in the ring
e. Install housing (8) on hub (3). Pack the area
are located in line with grease fittings (15). Install relief
between bearings (5 and 10) with GAA grease. Warm
fittings (9).
and install inner race of bearing (10) over outer diameter
m. Warm bearing (19) and install it firmly against lock
of hub (3). Exact location on the hub does not matter at
ring (18).
this time.
n. Press seal (20) into position in drum (16). Prepack
f. Install bearing (1) on shaft (2). Warm the bearing
seal with type GAA grease and be sure seal lip points toward
before installation and apply force against the inner race
bearing (19).
only, if necessary. Make sure bearing is firmly against
o. Install O -ring 121) in spacer (22). Lubricate bore of the
shaft shoulder.
spacer and O -ring, and slide the two items into position on
g. Install shaft (2) and bearing (1) in hub (3). Be sure
shaft (2). Avoid damage to seal (20) as spacer (22) enters
the bearing fits firmly in the shoulder of hub (3).
the seal. This completes bench assembly of the reversing
h. Refer to figure 2-8 and install sprocket, end plate,
shaft.
and end plate capscrews illustrated. Do not lock wire
5-42. Installation
capscrews, since they will be removed later in this
Refer to paragraph 2-17 and install the reversing shaft
assembly procedure.
assembly.
Section VIII. REPAIR OF HORIZONTAL SWING SHAFT
pressed out of the bottom of hub (8). Press shaft (7) out of hub
5-43. Description
(8). Bearing (6) will come off on shaft (7). Pull bearing (6) from
The horizontal swing shafts are located on each side of
shaft (7).
the vertical swing shaft (refer to fig. 5-1). Engaging the
c. Remove spacer (28), 0 -ring (27), and seal (26).
left horizontal swing shaft clutch turns the crane
d. Remove bearing (25) from bore of drum (221, using a
(revolving frame) to the right.
Engaging the right
suitable puller. Remove lock ring (24).
horizontal swing shaft clutch turns the crane (revolving
e. Remove capscrews (23) and remove drum (22).
frame) to the left. Both shaft are identical in construction.
Remove seal (21).
5-44. Removal
f. Remove shims (18, 19, and 20).
Refer to paragraph 2-18 and remove the horizontal swing
g. Block housing (14) and press hub and sprocket (8) out
shaft.
of the housing, pressing on the end of hub (8) which is tapped
5-45. Disassembly
for capscrews (23). Bearing (171 will remain in housing (14)
Disassemble the horizontal swing shaft as follows:
and the inner race of bearing (9) will come off on hub (8). All
a. Remove lock wire (1, fig. 5-12), capscrews ('2)
remaining parts may now be removed from housing (14) and
and washer (3). Pull bevel pinion (4) from shaft ('7) and
hub (8).
remove spacer (5).
h. Refer to paragraph 5-39 i for disassembly and
b. Stand assembly on end, with sprocket end of hub
reassembly instructions for the horizontal swing shaft clutch.
and sprocket (8) facing down. Make the blocking high
enough to allow shaft (7) to b
5-25
