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10) Remove plug on the top of hydraulic pump tank (reservoir). Make sure that hydraulic fluid
in tank is at FULL level. Add only Texaco 01554 Aircraft Hydraulic Oil, or equivalent U.S.
mil spec H5606G fluid and reinstall plug.
11) Repeat previous five steps until fluid coming out of bleeder valve is free of air.
12) Verify that air bleeder valve is fully closed.
13) Hold service access panel up, remove two retaining screws and lock-nuts at front edge of
panel, and then lower panel.
14) Connect positive (+) battery cable at vehicle battery compartment.
15) Remove platform support and stow platform.
b. ALTERNATE BLEEDING PROCEDURE
1) Connect hydraulic hose to fitting on pump box, if not already connected.
2) Use manual pump to fill hose; fluid should flow from open end.
3) Connect open end of hose to fitting on pull box.
4) Verify that top of enclosure is about 40” above ground, and that enclosure is level.
5) Deploy platform and lower until maximum down travel is obtained.
6) Raise platform to floor level.
7) Repeat above cycle ten times.
2. PLATFORM VERTICAL TRAVEL LIMIT ADJUSTMENT
CAUTION!
The following procedure measures and sets the platform height at floor level. Adjustments
to platform height are made at a lower height to reduce loading on the hydraulic cylinder
piston. Do not attempt to rotate hydraulic cylinder piston rod if excessive resistance is felt.
Determine cause of resistance, and correct before rotating piston rod.
NOTE: This procedure should be used to adjust vertical travel limit errors of less than 1”. Errors greater
than 1” must be adjusted by supporting platform, removing keeper plates (2 ea), and rotating the
trunnion
.
a. Raise platform until hydraulic cylinder is fully
extended.
b. Measure vertical distance between floor and rear edge of platform. The platform must be 1–1½”
above
the floor. Note the amount of error, and whether platform needs to be raised or lowered.
Continue this procedure, if adjustment is necessary.
c. Lower the platform to a height about one foot below floor level, and support it.
d. Loosen jam nut on hydraulic cylinder piston rod.
e. Rotate piston rod to raise or lower platform the required amount; rotate CW to raise platform and
CCW to lower. Do not rotate piston rod more than ¼ turn without checking result.
f. Return platform to floor height (fully extend hydraulic cylinder), and remeasure the distance
between floor and platform. If readjustment is necessary, repeat steps b through f.
g. Tighten jam nut.
NOTE: Reprogram the stow height (and intermediate height, if lift is installed in baggage bay) if an
adjustment was made. Refer to the Platform Stow Height Adjustment section in this chapter.
3. BRIDGEPLATE ACTUATOR ROD ADJUSTMENT
Bridgeplate deployment is controlled by two actuator rods. The length of the rods control the angle of
the bridgeplate relative to the platform. Adjust actuator rods so bridgeplate is fully unfolded when
platform arrives at floor height.
WARNING!
INCORRECT DEPLOYMENT OF BRIDGEPLATE CAN CREATE A DANGEROUS
CONDITION FOR LIFT USER, AND MAY CAUSE DAMAGE TO THE BRIDGE PLATE
OR PLATFORM. VERIFY THAT THE BRIDGEPLATE IS ADJUSTED CORRECTLY.
a. Deploy platform using control pendant ( /OUT).
b. Raise platform to floor height and support it.
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