PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
Check service brakes for pulling,
Brakes pull, grab or exhibit
grabbing or reduced braking capacity.
Check for smooth, controlled steering
Steering is erratic.
without pulling or drifting.
Monitor tractor operation for unusual
noise or vibrations from engine, trans-
mission, driveshafts, axles and
Monitor bowl operations for unusual
noise or vibrations from apron, ejec-
tors and bowl lift cylinders.
Be alert for evidence of fluid leakage.
Class III fuel, oil or hydrau-
lic fluid leaks are evident.
Any coolant leak is evident.
With machine fully warmed up, moni- Gages indicate an abnormal
tor warning lights and readings on
a. Engine coolant temperature range
should be in the green range.
b. Torque converter oil temperature
range should be in the green range.
c. Air system operating pressure range
is 110 +/- 10 psi (758 +/- 69 kPa).