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TM 9-2320-364-20-2
2-1767
If air lines are under high pressure when they are disconnected, they can whip around and cause injury
to personnel. Caution should be exercised when loosening or disconnecting air line fittings.
Wear safety goggles when performing leakage tests on valves. Failure to do so may result in serious
eye injury due to high pressure air.
Truck must be on level ground and wheels must be chocked before parking brake is released.
Otherwise, truck may roll and cause injury to personnel.
(1) Apply PARKING BRAKE
(TM 9-2320-364-10).
(2) Disconnect air line 2140 from right
air chamber.
(3) Connect a 0 to 160 psi (0 to 1103 kPa)
gage to air line 2140.
(4) Release PARKING BRAKE.
(a) If there are 125 4 psi
(861 28 kPa) present at air
line 2140, perform Step (5) below
and replace relay spring valve
No. 2 (Para 12-17).
(b) If there are not 125 4 psi
(861 28 kPa) present at air
line 2140, relay spring valve
No. 2 is OK.
(5) Apply PARKING BRAKE.
(6) Remove gage and connect air
line 2140 to right air chamber.
RELAY SPRING VALVE NO. 2 TEST
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