TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 170 of 552

TM 9-2350-311-34-2

5-4 CANNON TUBE - CONTINUED

a. Removal - Continued

10

11

12

13

14

15

16

Place fabricated breech stand (8) between the breech ring (9) and the floor of the vehicle, as required, to

support the breech ring after withdrawal of cannon assembly.

NOTE

Refer to steps 13 through 15 for alternate method of rotating cannon tube if chain-type pipe wrench

is NOT available.

install chain-type pipe wrench (10) on cannon tube (5) at a location without critical external features.

NOTE

Cannon tube is rotated 45° when keyway on cannon tube is alined with upper left bolt hole for

dust shield.

If cannon tube is difficult to rotate, some of the nitrogen pressure in the recuperator assembly

may have to be discharged (para 5-11) to relieve binding on breech ring band.

Rotate cannon tube (5) 45° counterclockwise to disengage cannon tube from breech ring (9) threads.

NOTE

If chain-type pipe wrench has been used, skip to step 17.

Install muzzle brake (11) (TM 9-2350-311-10).

Insert a 4 x 4 inch wooden block at least 5 feet long into muzzle brake (11).

Using wooden block for leverage, rotate muzzle brake (11) and cannon tube (5) 45° counterclockwise to dis-

engage cannon tube from breech ring (9) threads.

Remove muzzle brake (11).

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