CHAPTER 5
CRAWLER REPAIR INSTRUCTIONS
Section I. ROLLER (TURNTABLE) CIRCLE
5-1.
General
The roller (turntable) circle is supported by roller path on
crawler. The inner and outer segments position rollers
uniformly around the roller path.
Load is evenly
transmitted from upper rotating machinery to crawler
frame as the revolving frame swings around the crawler.
5-2.
Roller (Turntable) Circle
a. Removal and Installation.
(1) Remove the revolving frame (para 2-10).
(2) Lift turntable roller circle from roller path to
crawler (fig. 5-1).
b. Disassembly and Reassembly.
(1) Remove or install rollers from inner and
1
Nut (24 rqr)
outer turntable roller circle segments (TM 5-3810-201-
2
Lockwasher (24 rqr)
12).
3
Roller (24 rqr)
(2) Remove eight nuts (7, fig. 5-1), lock-
4
Shaft (24 rqr)
5
Capscrew (16 rqr)
washers (6), and capscrew (5) then separate the two
6
Lockwasher (8 rqr)
outer turntable roller segments (11).
7
Nut (16 rqr)
(3) Remove eight nuts, lockwashers, and
8
Fuild passage bolt (24 rqr)
capscrew, then separate two inner turntable roller
9
Bushing (24 rqr)
10
Fitting (24 rqr)
segments (12).
11
Outer segment (2 rqr)
(4) Reassemble turntable (circle) roller by
12
Inner segment (2 rqr)
reversing the procedures in steps (3) through (1) above.
Figure 5-1. Roller circle, exploded view.
c. Cleaning, Inspection, and Repair.
(1) Clean all parts and dry thoroughly.
threads, or excessive body wear. Assure that lubrication
(2) Inspect the four segments for cracks,
fittings will admit grease.
breaks, or excessive wear at roller holes for fluid
(3) Repair roller segments by welding cracks
passage bolts. Inspect rollers for excessive external (flat
or breaks. Replace defective segments. Repair roller
spots), or bushing wear. Inspect fluid passage bolts for
circle by replacing defective rollers. When individual
damaged external or internal
rollers are replaced, machine outer surface of new rollers
until all 24 rollers do not vary more than 0.005 inch.
Replace defective fluid passage bolts, lubrication fittings,
or mounting hardware.
Section II. STEERING AND PROPELLER MECHANISM
are linked with the propel brakes and jaw clutches on the
5-3.
General
horizontal propelling shaft. The two steering and brake
The steering and brake lever shafts and propel clutch
lever shafts are
shifters, two of each, are located in the crawler. They
AGO 20051A
5-1
