PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONTINUED
Table 1. Preventive Maintenance Checks and Services (PMCS) for 621B Scraper - Continued.
NOT FULLY MISSION
Draft Frame, a. Check draft frame for cracks, dam-
Cracks, damage or distor-
age or distortion.
tion are noted.
b. Check hydraulic lines and hoses
Class III hydraulic fluid
along draft frame for damage or
leaks are evident. Any air
signs of leaking and secure mount-
leak is evident. Loose or
ing. Also check air line along right
missing mounting hardware
side front of scraper bowl.
c. Check electrical wires and connec-
Bare electrical wires or con-
tors for damage and secure mount-
nectors are damaged.
d. Check left and right bowl lift cylin-
Class III leaks are evident.
ders, hoses, lines and fittings for
Loose or missing mounting
damage or signs of leaking and
hardware is noted.
e. Check apron for damage or obstruc- Damage that would impair
tions that would interfere with oper- operation is evident.
f. Check for damage or obstructions
Damage that would impair
inside bowl that would interfere
operation is evident.
with ejector operation.
a. Check that bowl worklight is
present and securely mounted.