outer race of the bearing and seal (23) in clutch housing
indicating micrometer. End play should be 0.003 to 0.005
inch. Remove clutch drum (13) and install sufficient
c. Place hub and sprocket (8) on end, with the
number of shims (17), (18) and (19) to provide proper
sprocket end down. Install the outer race of bearing (21)
i. Press seal (16) into bore of housing (20), with
in clutch housing (20).
d. Install clutch housing (20) on hub and sprocket
seal-ing lip pointed toward bevel pinion (4). Install
housing on hub (8).
(8). Pack area between seal (23) and bearing (21) with
j. Install drum (13) using screws (15) with correct
type GAA grease. Warm and install the inner race of
number of shims (17), (18) and (19) in place. Tighten
bearing (21) over the outer diameter of hub and sprocket
screws (15) to 20 to 25 ft-lb (2734 N- m).
e. Warm bearing (6) and install the bearing on
k. Install lock ring (14) with holes in the ring located
directly in line with grease fittings (27). Warm bearing
shaft (7). Be sure to apply force only to the inner race of
(12) and install the bearing firmly against lock ring (14).
the bearing, and be sure bearing is seated firmly against
l. Lubricate seal (11) with type GAA grease and in-
the shaft shoulder.
f. Install shaft (7) and bearing (6) into hub and
stall the seal in the bore of drum (13). Be sure seal seat-
ing surface is clean and free of burrs and nicks.
sprocket (8). Be sure bearing (6) is firmly against the
m. Install packing (10) on spacer (9) and slide the
shoulder in hub and sprocket (8).
g. Install spacer (5) and bevel pinion (4). Secure
assembly into position on shaft (7).
with washer (3), screws (2) and lock wire (1).
h. Temporarily assemble drum (13) on hub (8)
using three screws (15) evenly spaced. Do not install
Refer to paragraph 2-15 and install the horizontal swing
shims at this time. Tighten the screws to 20 to 25 ft-lb
shaft. Shims (25) and (26) and packing (24) are installed
(27--34 N. m). Check shaft end play using a dial
at this time.
REPAIR OF SWING BRAKE SHAFT
sling to the bottom foot lugs on the revolving frame and
to the gantry peak pin. Remove the upper from the car-
As is shown in figure 5-1, the swing brake shaft mates
rier and place it on suitable blocking so that there is
with the slewing ring, and is used to prevent the revolv-
adequate working space beneath the revolving frame.
ing frame from slewing or rotating uncontrolled.
Removing the revolving frame is only neces-sary
if the swing brake shaft itself is to be removed.
The swing brake shaft cannot be removed as an assem-
The wearing components of the brake, with the
bly, but must be disassembled in place.
exceptions of the brake shaft and shaft bearings
can be removed without undecking the machine.
a. Refer to TM 5-3810-295-12 and perform the
c. Refer to figure 5-12 and remove the screws (1),
lock washers (2), shield (3), pipe spacers (4), and re-
(1) Remove any front end attachment.
tainer (5). Place blocking beneath shaft (34) to prevent it
(2) Remove hook rollers.
(3) Drain oil from upper gear case, as shown in
the lubrication chart.
b. Using a suitable overhead crane, attach a lifting