PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
With ejector all the way forward,
Damage or Class III leaks
check for damage or evidence of leaks
from ejector hydraulic cylinder and
a. Check if final drive nuts are loose.
Final drive nuts are loose.
Notify Unit Maintenance to re-
· Operating machine with underinflated or defective tire may
lead to tire failure and loss of traction or control. Damage to
equipment or injury to personnel may result.
· If tire pressure is 0 psi (0 kPa) do NOT inflate. Notify Unit
Maintenance. Failure to follow this warning may cause injury
b. Park machine so that valve stem is
at 9 and 3 o'clock.
c. Clean area around valve stem, then
remove valve stem cap.
d. Check air pressure in each tire with
tire pressure gage. Tire inflation
should be 60 psi (413 kPa) for trac-
tor tires and 40 psi (276 kPa) for
Use a self-inflating chuck and stand at tread side of tire at
maximum distance allowed by inflation hose. Failure to do
so could result in injury or death to personnel.
e. Adjust air pressure in tire as
required to 60 psi (413 kPa) for the
tractor tires and 40 psi (276 kPa) for
the scraper tires. Use the pneumatic
tire inflation hose assembly.
f. Install valve stem cap.