TM-9-2350-311-20-2

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 272 of 828

TM 9–2350–311–20–2

5–16

5–7

SPINDLE ASSEMBLY — CONTINUED

a.

Removal — Continued

NOTE

•

Perform step 8 for M284 cannon assembly containing plunger assembly 11580469.

•

When the plunger assembly is pulled out and locked in position B, the nut and spindle assembly

can be removed without the housing and firing group block.

•

the plunger assembly cannot be pulled out easily, a screwdriver or pry tool can be inserted be-

tween plunger tip and nut. Applying leverage will free plunger assembly.

8

Move pin (13) located on top of plunger assembly (14), against helical compression spring (15) from position

A to position B.

NOTE

Cartridge extractor is located inside firing group block.

9

Partially withdraw nut (8) by moving cartridge extractor (16) away from nut. Support firing group block (4)

and housing (17). Using spanner wrench, remove nut.

8

17

4

16

Position A

Position B

Position C

“Pin”

PLUNGER ASSEMBLY 11580469

M284 CANNON CONFIGURATION

15

13

14