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![]() TM 9-2320-363-20-2 
CTIS AIR TUBE REPLACEMENT 
This task covers: 
a. Removal 
b. Cleaning/Inspection 
c. Installation 
INITIAL SETUP 
Applicable Configuration: 
M917A1 and M917A1 w/MCS 
Materials/Parts: 
Compound, Pipe 
Appendix C, Item 8 
Tools and Special Equipment: 
Sealing 
Tool Kit, SC 5180-90-CL-N26 
Equipment Condition: 
Reference 
Condition Description 
Page 2-28 
Air System Drained 
REMOVAL 
WARNING 
Drain all air from the wet tank before disconnecting any air lines, hoses, tubes, or 
fittings. Always use eye protection. Failure to observe this warning can result In 
serious injury. 
NOTE 
Procedure is the same for all air tubes. 
Tag all air tubes and fittings prior to removal to aid during installation. 
Remove cable ties as necessary to remove air tubes. 
When replacing air tubes, remove tube from vehicle and cut new tube 1/4-1/2 
in. longer than tube being replaced. 
1. 
REMOVE NUT (1) FROM FITTING (2). 
2. 
REMOVE AIR TUBE (3) FROM FITTING (2). 
3. 
REMOVE INSERT (4), FERRULE (5), AND NUT (1) FROM AIR TUBE (3). 
CLEANING/INSPECTION 
Clean and inspect all parts in accordance with Chapter 2. 
4-604.30 Change 3 
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