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

  TM-9-2350-358-BD - Page 223 of 343

TM 9-2350-358-BD
SECTION IV.
HYDRAULIC LINE REPAIRS
11-8.
GENERAL
To operate some of the vehicle mechanisms a considerable amount of energy must be exerted.
Hydraulic power is used
to perform these high energy tasks.
High energy requirements (or high speed tasks) are usually met with high-pressure
hydraulic hose or metal tubing.
There are also metal low-pressure lines used when heat is a consideration or shape is
critical.
This section provides expedient repair procedures for the repair of high and low pressure tubes and hoses.
11-9.
METAL TUBE BENDING
General Information:
Bending may be required to make tubing repairs.
Dry sand can be poured into the tube to be bent If, tube bender is not
available.
The ends must be plugged to keep the sand from falling out.
Soft metal tubes can be sealed with finger
pressure but harder lines should have a plug inserted.
After bending the tube, flush the sand from the tubing with a liquid
to ensure removal of all the particles.
11-10. HYDRAULIC TUBE AND HOSE REPAIR (LOW PRESSURE)
General Information:
The M109A6 hydraulic system uses o-ring seal (ORS) hose and tube fittings, all fabricated or replacement hydraulic lines
must use ORS fittings as end connectors.
The repair procedures in this paragraph are for the repair or damage to the
center section of low pressure hydraulic hoses or tubes.
For the fabrication of lines or the replacement of end connectors
reference paragraph 11-11 high pressure hose and tube repair.
Option 1:
Low-pressure line repair (same size tube ends).
Limitations:
Not recommended for pressure over 70 psi.
Personnel/Time Required:
•
1 soldier
•
0.5-1.2 hours
Materials/Tools:
•
AN/MS fittings (found in M2/3 generic BDR kit, Section III, Appendix C)
•
Hacksaw (found in M2/3 generic BDR kit, Section III, Appendix C)
•
Hand file (found In M2/3 generic BDR kit, Section III, Appendix C)
•
Deburring tool (found in M2/3 generic BDR kit, Section III, Appendix C)
•
Bending tool
•
Wire (scavenge from available source)
•
String (scavenge from available source)
•
Sealing compound (item 55, Appendix C)
•
Hose clamps (found in M2/3 generic BDR kit, Section III, Appendix C)
•
Tube cutter
•
Hose medium/high pressure (scavenge from available source)
11-5


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