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TESCO EQUIPMENT LLC
ML50-20 MAINTENANCE LIFT
B. Emergency Hi-Lift Lowering
CAUTION
STAND CLEAR OF DESCENDING HI-LIFT. SERIOUS INJURY TO OPERATOR MAY OCCUR IF
STRUCK BY DESCENDING LIFT.
(1) Close the valve (B) in the hydraulic box (ref. Figure 8) by loosening locknut and turning fully
clockwise.
(2) Go under the truck and reach up to the under side of the lift cylinders (ref. Figure 9).
(3) Locate the red manual operation knobs (E).
(4) Push in and turn the red knob counter-clockwise until it pops out.
(5) Return to the box and slowly open the flow control as necessary to bring the lift down
safely.
(6) Once down, the valve (E) must be reset by pushing in & twisting clockwise until it locks.
(7) Readjust valve (B) per Hydraulic Adjustment Section 2-2 when unit is functioning again.
Figure 9
EMERGENCY HI-LIFT CYLINDER LOWERING
E
May 08
Property of American Airlines
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