CHAPTER 2. CARE, MAINTENANCE, AND INSPECTION (Con't)
SECTION III. UNIT MAINTENANCE (Con't)
2-33. INNER TUBE REPAIR PROCEDURES.
This Task Covers:
a. Inspection and Repair Criteria
b. Inner Tube Repair
Inner tube removed from demounted tire
(see appropriate procedure)
Stitcher, Cementing and Vulcanizing stitcher
(Item 50, Appendix B)
Abrasive stick or wheel assembly tool (Item
55, Appendix B)
Repair Kit, Tube (Item 66, Appendix C)
Vulcanizing fluid (Item 85, Appendix C)
Buffing solution (Item 100, Appendix C)
a. INSPECTION AND REPAIR CRITERIA
1. Minor injuries to inner tubes can be repaired quickly and easily. Check inner tubes for punctures,
pinches, cuts, and cracks.
2. Refer to table below for authorized repairs. If the location of the injury is not obvious, locate the leak
by submerging either the whole inner tube or part of the inner tube in water. Extremely large leaks can
be located by running water over the surface and watching closely for bubbles.
3. Inspect valves for proper bends. Replace any leaky valve cores. Check for proper tightening of valve
stem nut, especially on new inner tubes. Ensure that each valve stem has a valve cap.
Table 2-5. Permissible Inner Tube Repairs.
Inner Tube Size
Two Repairs Not Exceeding
16.00 and up
1 sq. inch (6.5 sq. cm) each
2 sq. inches (12.9 sq. cm) each
4 sq. inches (25.8 sq. cm) each
b. INNER TUBE REPAIR
1. Mark location of injury.
2. Remove valve core (see paragraph 2-26).
Small punctures, such as nail holes or small cuts, can be repaired without removing