UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Unit Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
Inspect all belts for wear and loose-
SELECTION OF PROPER FIL-
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.
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.
a. Inspect tank for leaks, broken fit-
tings, cracked welds or missing
parts and replace or repair as neces-