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:
2
250 Hours
Belts
Inspect all belts for wear and loose-
or Semi-
ness and adjust (WP 0051 00).
Annually
Engine Oil
Change engine oil and filter (WP 0022
3
250 Hours
or Semi-
Annually
4
250 Hours
Cooling Sys-
Change coolant filter (WP 0050 00).
tem
or Semi-
SELECTION OF PROPER FIL-
Annually
TER: Alternate between use of pre-
charge filter and maintenance filter. In
other words, if a precharge filter is
removed, install a maintenance filter,
and visa versa.
5
250 Hours
Brakes
Adjust brakes (WP 0149 00).
or Semi-
Annually
6
500 Hours
Clean breather (WP 0023 00).
or Semi-
Breather
Annually
WARNING
Hot oil can cause burns. The hydraulic tank is hot and under
pressure when at operating temperature. Remove the fill cap
ONLY when the engine is stopped and the cap is cool
enough to touch with your hand. Remove the fill cap slowly
to relieve pressure.
7
500 Hours
Hydraulic
a. Inspect tank for leaks, broken fit-
or Semi-
Tank
tings, cracked welds or missing
Annually
parts and replace or repair as neces-
sary (WP 0245 00).
b. Change filters (WP 0208 00).
c. Clean fill strainer (WP 0231 00).
0020 00-2
