TM 5-3820-241-34
( c ) Inspect pillow block bushings for
( b ) . U s e a s u i t a b l e press to m o v e
bearings (42) and (45) from shaft (44)
excessive wear.
( d ) Inspect all hardware and threaded
6-7. Tramming Transmission Brake and Crawler
areas for crossed threads. Retap threaded holes
Drive Cleaning, Inspection and repair
and replace defective hardware.
a. Cleaning.
(e) Repair by replacement of defective
(1) Clean all parts except O-rings and seals
parts.
with cleaning solvent (FED SPEC PD 680) and
6-8. Tramming Transmission Brake and Crawler
dry thoroughly.
Drive, Reassembly and Installation
(2) Discard and replace all seals and O-ring.
a. Reassembly.
b. Inspection and Repair.
(1) Tramming Transmission.
(1) Tramming Brake.
(a) Reassemble t h e t r a m m i n g t r a n s -
(a) Insert the brake piston (9, fig. 6-2) into
mission gear case in the reverse of numerical
the cylinder head (12) and check to make sure it
sequence as illustrated in figure 6-3.
moves freely.
(b) Use a suitable press to install bearings
(b) Inspect the brake lining for excessive
on shafts and in housing.
wear, if lining is less than 1/32-in. thick above
(2) Tramming Brake. Reassemble the
rivet head, replace the lining.
t r a m m i n g brake in the reverse of numerical
(c) Inspect the brake drum for excessive
sequence as illustrated in figure 6-2.
wear or scoring. Replace a defective drum.
b. Installation.
( d ) Inspect all hardware and threaded
(1) Install the tramming transmission
areas for crossed threads, retap threaded holes
assembly and brake housing (para 2-18).
and replace defective hardware.
(2) Install the tramming motor (para 2-14).
(2) Tramming Transmission.
(3) Refer to TM 5-3820-241-12 and adjust
(a) Inspect all gears for missing or broken
the tramming brake.
teeth.
(b) Inspect all bearings for excessive wear
(4) Refer to LO 5-3820-241-12 and lubricate
the rock drill.
other damage.
Section III. CRAWLER SIDE FRAME AND EQUALIZER
6-9. General
6-10. Crawler Side Frame and Equalizer,
Removal and Disassembly
The main frame assembly or track section of the
rock drill carrier is made up of two box sections
a. Removal.
welded together. The larger section runs the
(1) Remove the tramming motor (para 2-13).
width of the rock drill and houses a 13 gallon
(2) Remove the tramming transmisaion and
hydraulic oil tank on the right side and a five
brake housing (para 2-17).
gallon rock drill oil reservoir on the left side. It
(3) Remove the crawler drive side frame in
also mounts the two tramming motors and
numerical sequence as illustrated in figure 6-4.
tramming transmissions.
6-6