TM 5-3805-248-23-1
UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
0020 00
Table 1. Unit Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
LOCATION
ITEM TO
ITEM
MAN-
CHECK/
NOT FULLY MISSION
NO.
INTERVAL
HOURS
SERVICE
PROCEDURE
CAPABLE IF:
31
2000 Hours
Ejector Car-
or Annually
rier Rollers
a. Raise ejector (WP 0329 00).
b. Remove four bolts (25) and cap
(18) from the roller (24).
c. Remove the nut (19), lock (20) and
washer (21) from the shaft (22).
Discard lock.
d. Remove the outer bearing (23)
from the shaft (22).
grease. Pack the outer bearing (23)
with grease.
f. Install upper bearing (23), washer
(21), new lock (20) and nut (19) on
shaft (22).
g. Tighten nut (19) until roller (24)
locks. Then back nut off 1/6 of a
turn. Roller should turn freely
without end play.
h. Pack cap (18) with grease and
install cap and four bolts (25).
18
19,20,21,
22,23 (HIDDEN)
24
25
394-1541
0020 00-11