TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

  TM-9-2350-311-20-1 - Page 446 of 1275

TM 9-2350-311 -20-1
3-3 TROUBLESHOOTING CHART — CONTINUED
af. VENTILATED FACE PIECE SYSTEM CIRCUIT —
(2) AIR PURIFIER FAILS TO OPERATE; HEATERS
CONTINUED
OPERATE PROPERLY
T
OO
I
S
General mechanic’s tool kit (item 64, Appx H)
Multimeter (item
36,
Appx H)
TA-1 probe kit (item 43, Appx H)
A
1. Disconnect lead 439A from air purifier.
2. Place red lead of muitimeter in lead 439A and
black lead to ground.
3. Turn MASTER and NBC switches ON and
check for voltage.
4. Turn MASTER and NBC switches OFF.
Is voltage present?
I
I
I
Repair or replace lead 439A of
ventilated face piece system harness I
I (para 8-62).
I
I
1. Reconnect lead 439A to air purifier.
I
2. Disconnect ground lead from air purifier.
3. Place red lead of multimeter on ground lead
I
and black lead to ground.
4. Check for continuity.
I Is continuity present?
I
I
.
Replace air purifier ground lead (para
12-1).
I Replace air purifier (para 12-1).
END OF TASK
B
3-346


Back to Top