TM 9–2350–311–20–2
2–25
Table 2-2.
PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-
PROPELLED HOWITZER – CONTINUED
Location
Item
No.
Not Fully Mission
Capable if:
Procedure
Item to Check/Service
Interval
5
Quarterly
Elevation Mechanism
a. Position vehicle on level ground.
b. Release travel lock and stow.
c. Elevate cannon through entire range
of –53 to +1333 mils:
Elevating fails af-
ter attempting
both methods.
1. Manual
(a)
From AG side of turret,
manually elevate and depress
howitzer.
(b)
Check for leaks in hydraulic
lines, valves, and controls.
Also for smoothness. Repair
as necessary.
2. Power
(a)
Turn MASTER switch (1) and
CAB POWER switch (2) to ON
(light lit).
(b)
Turn ELEVATION CONTROL
switch (3)
to GUNNER posi-
tion.
(1)
Elevate and depress can-
non through entire range
using gunner’s control
handle (4).
(2)
Check for smoothness of
operation through entire
range.
(3)
Check for leaks in hy-
draulic lines, valves, and
controls. Repair as nec-
essary.
(c)
Turn ELEVATION CONTROL
switch (3) to NO. 1 position.
Perform steps 2(a) through
2(c) again.
1
2
4
3