
4
TO OPERATE WITH AIR
1. Connect the high pressure hose fitting (G) to the aircraft strut
valve and tighten by hand. Some strut valves require a locking
jam nut to be loosened first. Consult the appropriate service
manual.
WARNING: 150psi is the maximum allowable pressure at the inlet.
2.Connect the strut pump inlet (A) to shop air or nitrogen tank with
a regulated pressure of between 80psi and 150psi. The pump
works best if 100psi to 150psi is applied to the inlet.
3. Operate the slide valve (B) back and forth on the inlet end of the
pump. This will cycle the internal piston back and forth until the
desired pressure or strut extension is obtained. You will hear the
piston come in contact with the pump body at the end of each
stroke. If the pump fails to build pressure—see Step 6 and retry.
4. Disconnect the shop air hose at the inlet port (A). Disconnect the
high pressure air hose from the strut.
5. After 4 or 5 uses, inject 3 or 4 drops of strut oil or 30 wt engine
oil into the air inlet port (A).
6. After extended non-use, the internal
piston may become stuck if it was left
in the extended position. The internal
“O” rings may stick slightly because of
this. It may be unstuck easily by using a
blow gun and air supply. Just apply shop
air to the large cylinder bleed hole (D).
The “cylinder sticking” can be eliminated
if the piston is “Parked” in the retracted
position. Simply move the slide valve
(B) back toward the air inlet (A) before
disconnecting the air supply.
D