TM-9-2350-358-BD

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE

MARCH 1994

TM-9-2350-358-BD - Page 237 of 343

TM 9-2350-358-BD

11-12. HYDRAULIC HIGH-PRESSURE TUBING REPAIR (PERMASWAGING) - CONTINUED

4.

Make two cuts and remove the damaged section.

Prepare a replacement tubing section.

Use two tube-to-tube

unions when this step is used.

REPAIR OF LONGITUDINAL CRACK IN TUBING

(CRACK LENGTH EXCEEDING .030 INCH)

5.

Cut out defective tee or elbow and duplicate tubing sections for each branch.

Use three tube-to-tube unions and

one tee when this step is used.

REPAIR OF LEAKING TEE OR ELBOW

(PERMANENT TUBE CONNECTION TYPE)

6.

Cut tubing to remove damaged tube end and end fitting.

Connect a new end fitting to the mating equipment

connection.

Cut replacement section to fit between cut tube end and end fitting Install splice section in new end

fitting first and tighten nut as required.

REPAIR OF LEAKING END FITTING

7.

Ends of tubing to permaswaged must be centered inside the permaswage fitting Use steps a. and b.

a.

Mark half of the overall length of the permaswage fitting on the tubing end as shown.

b.

Repeat marking procedure on the other tubing end to be swaged.

11-19