TM-9-2350-311-10

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

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 133 of 775

TM 9--2350--311--10

Change 6

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Table 2--1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item

No.

Not Fully Mission

Capable If:

Crewmember

Procedure

Item to Check/

Service

Interval

27

Before

M145/M145A1

Telescope Mount

GUNNER

Before firing, make sure elevation handwheel (1)

and all knobs (2) are undamaged and move freely.

Ensure level vials (3) are legible, that glass mirrors

are not scratched, and vial covers move freely.

Make sure LEDs illuminate vials. Inspect counters

(4), making sure viewing windows are not broken

and numbers move freely and read accurately.

Make sure mounting is secure.

Knobs won’t turn.

Loose or defec-

tive parts prevent

proper operation.

Level vials are

cracked, broken,

or illegible.

Counters skip.

Mounting is inse-

cure.

1

2

3

4

2

2

3

3