PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
e. Operate controls for another five
f. Move machine and operate all con-
trols through full motion, to bring
all systems to operating tempera-
g. Move machine and continue to
operate all controls through full
motion for 30 minutes AFTER
machine systems have reached
h. Stop machine and allow to idle for
i. Shut down engine.
j. Perform After operation PMCS.
Be ALERT for personnel in the area while operating
machine. Always check to ensure area is clear of personnel
and obstructions before starting engine, moving machine or
lowering or raising scraper bowl. Failure to follow this
warning may cause injury or death or damage to equipment.
If the tractor begins to move during service brake test,
reduce engine speed immediately and engage parking brake.
Perform the following service brake
Machine moves with engine
RPM less than 1,400 rpm.
a. Ensure area around machine is clear
b. Test brakes on dry level surface.
c. Fasten seat belt before testing
d. Ensure air system is at operating
pressure of 110+/-10 psi (758+/-69