PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
a. Check air tanks, lines and valves
Damage that would impair
under left side of tractor for dam-
operation is evident.
aged or missing parts.
Wear suitable eye protection and keep face and eyes away
from exhausting air tank drain valves. Failure to do so may
b. Open drain valve on each air tank to
drain all moisture and sediment.
Check for oil in draining air. If oil is
noted, notify Unit Maintenance.
Close drain valves when all air and
moisture have vented.
FRONT AIR TANKS