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 148 of 775

TM 9–2350–311–10

2–56

Change 3

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

36

During

Recuperator

Assembly (Cont)

CHIEF OF SECTION

a. After firing 100 rounds sustained fire, check pins

(1) in recuperator assembly (2) from outside of

vehicle and check pins (3) in recuperator head

(4) from inside of vehicle. Pins must extend from

1/4 to 3/4 inch (6.4 to 19.05 mm).

Pins (1 and 3)

cannot be

brought into

specified range.

b. If pins are not extended within this range, bleed

or fill recuperator assembly. If pins extend be-

yond 3/4 inch (19.05 mm), remove valve cap (5)

from valve (6) and add hydraulic fluid (item 20,

Appx D) until pins extend 1/4 inch (6.4 mm). If

pins extend less than 1/4 inch (3.2 mm), loosen

drain plug (7) and drain hydraulic fluid until pins

extend 1/4 inch (6.4 mm).

3

4

1

2

5

6

CAP SCREW

COVER

7

36.1

During

Variable Recoil

Assembly

CHIEF OF SECTION

CAUTION

During operation, there shall be no more than

1 ml (approximately 25 drops) of oil accumula-

tion at any seal interface location. Immediately

following this determination oil accumulations

are to be wiped clean prior to an additional five

(5) rounds.

Check for oil accumulation at seal interface(s) and

for any hydraulic leaks.