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. Raise bowl.
77
(Con't)
f. Apply service brakes and release
parking brake.
g. With engine at idle with service
brakes applied, move transmission
control lever to forward speed posi-
tion 2.
h. Gradually increase engine RPM.
Service brakes should prevent
machine movement with engine
running at 1,500+/-100 RPM.
NOTE
78
Monthly
Parking
Brake Test
If machine begins to move during parking brake test, reduce
engine speed immediately and engage service brakes.
a. Ensure area around machine is clear
Machine moves with engine
of all personnel and obstacles.
RPM less than 900 RPM.
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).
e. Raise bowl.
f. With engine at idle and parking
brake applied, move transmission
control lever to forward speed posi-
tion 2.
g. Gradually increase engine RPM.
Parking brake should prevent
machine movement with engine
running at 1,000+/-100 RPM.
h. Move ejector to the rear and shut
down engine (WP 0005 00).
i. Place battery disconnect switch in
OFF position.
END OF WORK PACKAGE
0014 00-48
