HYDRAULIC SYSTEM ADJUSTMENTS
2-2
Page 3
ML50-30 MAINTENANCE LIFT
TESCO EQUIPMENT LLC
Figure 1
HYDRAULIC SYSTEM
F
G
Stabilizer
Pressure
Reducing Valve
Stabilizer
Pressure Switch
(Left Rear)
N/A
Fully retract lift and stabilizers. Turn valve fully
clockwise and extend/retract stabilizers till all
stabilizers operate smoothly and consistently with
the left rear stabilizer last to extend and last to
retract (See Adjustment D). Then turn valve
counter-clockwise till chassis is lifted between 1 &
2 in. (2.54 am & 5.08 am). Fully retract stabilizers
between adjustments. Chassis must be level +/- 1
in. (2.54 am) side to side.
Ensure Stabilizer Pressure Switch still just
activates when stabilizers are extended. Screw in
adjustment to increase the pressure needed to
activate the switch. Screw out to decrease. Retract
stabilizers and verify pressure switch deactivates.
H
Compressor
Pressure Relief
N/A
Open the valve all the way counter clockwise.
While the compressor is running continue to raise
the lift. Adust valve (clockwise) until the lift
operates smoothly. Turn valve clockwise to
increase pressure, counter-clockwise to lower
pressure.
ITEM
FUNCTION
SETTING
PROCEDURE
A
C
B
D
E
F
STABILIZER
G
H
Mar. 17
Property of American Airlines
