c. Cleaning, Inspection, and Repair.
(7) Position shifter fork (1, fig. 4-11) on lever
(24) and secure with bolts (23), lock-washers (20), and
(1) Clean all parts and dry thoroughly.
nuts (18).
(2) Inspect brakedrum for cracks, breaks, or
e. Installation.
out of round. Inspect jaw clutch, gear, swing pinion spur
gear, or splines of shaft, for chipped or worn teeth.
(1) Working from beneath revolving frame,
Inspect pilot bearing stand or sleeve bearings for
slide swing shaft up through carbody and revolving
damage or defect.
frame. As shaft end comes into position install key (29)
(3) Repair by welding cracks in brakedrum
in swing brakedrum keyway in shaft (25).
and machine it into round. Replace defective shaft,
(2) Position pilot bearing stand (3) on swing
gears, or damaged mounting hardware. Repair or
brakedrum hub and revolving frame, then install end
replace a damaged pilot bearing stand.
plate (5) and secure with capscrews (6) and lockwire (7).
d. Reassembly.
Install shims (8 and 9), bolts (12), lockwashers (11) and
nutes (10) to secure pilot bearing stand (3) to revolving
(1) Install sleeve bearing (30, fig. 4-16) in
frame. Remove wood blocks from between brakedrum
revolving frame and sleeve bearing (4) in pivot bearing
(13) and gear (23).
stand (3).
(3) Working from beneath revolving frame,
(2) Use suitable lifting device and position
install washer (27), capscrews (6) and lockwire (28).
gear (19) on revolving frame.
(4) Install elbow and connector on pilot
(3) Install jaw clutch (33) in gear (23), position
bearing stand (14. fig. 4-6) then connect lubricating line
shifter collar (14) on jaw clutch (33) and secure with bolts
(22).
(31), lockwashers (15), and nuts (16).
(5) Install swing brake band (para 4-24).
(4) Connect hose (17) to connector on elbow
(6) Install horizontal gear train cover, vertical
(22) mounted on gear.
propelling shaft gear guard, and swing brake dirt guard
(5) Use suitable lifting device to position swing
(TM 5-3810-201-12).
brakedrum (13) on gear (23).
(7) Adjust swing brake (TM 5-3810-201-12)
(6) Slide swing pinion spur gear (26) on
(8) Lubricate (LO 5-3810-201-12).
bottom end of spur gear shaft (25), and secure with end
washer (27), capscrews (6) and lock-wire (28).
Section XIII. VERTICAL PROPELLING SHAFT AND PIVOT CENTER GUDGEON
(4) Disconnect lubricating line (10, fig. 4-2) at
4-27.
General
the shifter collar half (18).
The vertical propelling shaft is located toward the front of
(5) Remove shifter fork and lever (para 4-26).
revolving frame, ahead of the main drum (hoist) shaft. It
(6) Remove two nuts (20), shifter collar (18)
passes through the revolving frame and pivot center
and bolts (17) from jaw clutch (16).
gudgeon of the crawler frame. The gear at top of shaft
(7) Lift jaw clutch (16) up and off gear (15).
meshes with swing gear on vertical swing shaft and the
(8) Use a suitable lifting device to remove
bevel gear on bottom of shaft meshes with the bevel
gear (15) from top of shaft (21).
gears on horizontal propelling shaft in the crawler.
(9) Remove fitting (4, fig. 4-17) from up-per
end of shaft (12).
4-28.
Vertical Propelling Shaft and Pivot Center
(10) Working from beneath revolving frame,
Gudgeon
block up bevel gear (15) and remove retaining ring (16)
from shaft (12).
a. Removal and Disassembly.
(11) Secure a sling around upper end of shaft
(1) Stop engine (TM 5-3810-201-12).
(12) and use a suitable lifting device to pull shaft upward
(2) Drain and remove propelling gear oil pan
and out of pivot center gudgeon (11).
(TM 5-3810-201-12).
(3) Remove vertical propelling shaft gear
guard (TM 5-3810-201-12).
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