TM 5-3805-248-10
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
0014 00
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
LOCATION
ITEM TO
CHECK/
ITEM
MAN-
NOT FULLY MISSION
SERVICE
NO.
INTERVAL
HOURS
PROCEDURE
CAPABLE IF:
e. Operate controls for another five
76
minutes.
(Con't)
f. Move machine and operate all con-
trols through full motion, to bring
all systems to operating tempera-
ture.
g. Move machine and continue to
operate all controls through full
motion for 30 minutes AFTER
machine systems have reached
operating temperature.
h. Stop machine and allow to idle for
five minutes.
i. Shut down engine.
j. Perform After operation PMCS.
WARNING
77
Monthly
Service
Brake Test
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.
NOTE
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
test:
RPM less than 1,400 rpm.
a. Ensure area around machine is clear
of all personnel and obstacles.
b. Test brakes on dry level surface.
c. Fasten seat belt before testing
brakes.
d. Ensure air system is at operating
pressure of 110+/-10 psi (758+/-69
kPa).
0014 00-47
