TM 9-2320-272-24-2
3-462. HUB AIR SEAL LEAK TEST (Contd)
b. Rear Hub Leak Test
NOTE
Air seals may not retain prescribed pressure immediately after
installation. Pressure will be maintained after seals have been in
operation and have seated on spindle.
1.
Install washer (4), O-ring (3), and rear hub connector (1) on hub (5).
2.
Install plug (2) on connector (1).
3.
Disconnect hose (7) from quick-exhaust valve elbow (6) and install pressure gauge on hose (7).
WARNING
Eyeshields must be worn when working with compressed air.
Compressed air source will not exceed 30 psi (207 kPa). Failure to
do so may result in injury to personnel.
CAUTION
Ensure external air source is known to be as clean and dry as air
supplied by vehicle. If in doubt, use the vehicle's air supply.
Contamination may cause damage to CTIS.
4.
Apply air pressure to rear hub (5) until air pressure gauge reads 80 psi (552 kPa).
5.
Observe air pressure gauge for one minute. Pressure gauge should not drop below 70 psi
(483 kPa). If air dropped below 70 psi (483 kPa), check connections for leaks using soapsud method.
6.
If connections are tight, replace hub air seals (para. 3-460 or 3-461).
WARNING
Air pressure will create airborne debris. Use eye protection.
Failure to do so may result in injury to personnel.
7.
If air pressure remained at 70 psi (483 kPa) or above, release air pressure through valve on air
pressure gauge.
NOTE
Wrap all male threads with antiseize tape before installation.
8.
Remove air pressure gauge from hose (7), and connect hose (7) to quick-exhaust valve elbow (6).
9.
Remove plug (2) from rear hub connector (1).
10.
Remove connector (1), O-ring (3), and washer (4) from hub (5).
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