Table 1. Preventive Maintenance Checks and Services (PMCS) for M878A2. cont'd

TM 9-2320-312-10

Table 1. Preventive Maintenance Checks and

Services (PMCS) for M878A2 - Continued.

LOCATION

ITEM TO

ITEM

CHECK/

NOT FULLY MISSION

NO.

INTERVAL

SERVICE

PROCEDURE

CAPABLE IF:

RIGHT SIDE

After

Air Dryer

a. Check exhaust port of air dryer for

obstructions such as mud or debris.

AIR DRYER

EXHAUST PORT

b. With engine running, pump service

brakes until dual air pressure guage

drops below 100 psi (690 kPa).

c. Allow air pressure to build in air

system until dual air pressure gauge

indicates approximately 125 psi

(862 kPa).

d. At approximately 125 psi, sound of

exhausting moisture from air dryer

exhaust port (purge valve) should be

heard. Green needle on dual air pres-

sur guage will begin to drop, until it

has dropped 10 psi (69 kPa).

e. Notify Unit Maintenance if moisture e. Air dryer moisture ejection (purge

ejection is inoperative.

cycle) does not operate.

0012 00-11