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 84 of 1275
TM 9-2350-311-20-1
2-15 PROCEDURES FOR SEMIANNUAL/ANNUAL SERVICES — CONTINUED
ITEM
NO.
24
25
TABLE 2-1 UNIT PMCS FOR M109A2/M109A3/M109A4/M109A5 HOWITZERS — CONTINUED
INTERVAL
Annual
Annual
ITEM TO BE
INSPECTED
Engine Mounting
Base
Road Wheels and
Idler Wheels
PROCEDURE
Lubricate engine rear jaw mount screw (36) with GMD
(item 47, Appx D).
NOTE
Reinstall powerplant (para 4-5).
Check for cracks in wheel (37). Tighten nuts (36) to
160-200 Ib-ft (217-271 N·m). Measure road wheel
wear as follows:
a. Pull out threaded rod and place gage (item 22, Appx
H) over road wheel as shown, backing off knurled knob
as required.
b. When gaging balls are in contact with wear ring and
inside of wheel disk, slowly turn knurled knob clockwise
until it just contacts rod housing. Do not tighten knob,
since this will pull inner gage ball away from wheel disk
(39).
c. Pull rod back, without disturbing knob, until gage can
be removed from wheel.
NOT FULLY
MISSION
CAPABLE IF:
Rear mount
mounting base
screw or jaw
broken.
Missing, bent,
elongated, or
cracked road
wheel or idler
wheel mounting
2-3 6
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