DESCRIPTION
1-1
Page 3
ML50-20 MAINTENANCE LIFT
TESCO EQUIPMENT LLC
E. Control Stations
Four (4) control stations operate the Hi-Lift functions.
The lower control station is located on the driver side forward chassis frame. It is equipped with
three (3) push buttons to operate the hi-lift up and down functions, and a beacon switch. It also
contains a mushroom head emergency stop switch.
The two (2) upper control stations are located at the forward left corner of the platform. One
upper control is mounted on a pedestal and equipped with rotary type switches to operate work
lights, remote engine stop and start, and compressor off and on, and a mushroom head
emergency stop switch. Another upper control is pendant type enclosure. It is equipped with three
(3) push buttons to operate the hi-lift up and down functions and a mushroom head emergency
stop switch.
The fourth control station operates the stabilizers. The stabilizer control station is located on the
driver side center chassis frame. It is equipped with two (2) momentary push buttons to retract
and extend the stabilizers. The stabilizers must be extended before the platform can be raised.
The dash inside of the cab also has indicator lights for lift and stabilizer functions.
F. Hydraulic System
The hydraulic system supplies the actuating power to the stabilizers and hi-lift. An arrangement
of valves regulates fluid flow from the engine-driven pump to the actuating cylinders during
operation. An adjustable relief valve controls the system pressure, and restrictor valves regulate
rates of flow. Load holding valves prevent retraction of the platform lift cylinders and the stabilizer
cylinders if power is lost. The electrical system actuates the solenoid valves. See Chapter 2,
Section 5 for schematic diagram.
G. Electrical System
The electrical system provides control circuits for the hydraulic system, chassis interface, and
lighting. The chassis electrical system supplies system power. Manual switches permit operator
control of the system. Inter-connected limit switches and relays assure proper operational
sequence. Circuit breakers protect the system from overloads. See Chapter 2, Section 5 for
schematic diagram.
May 08
Property of American Airlines
To Next Page
Loading...
