Emergency Down Valve; Adjustment; Test; Level Sensor (M/C Number 51250+) - Upright MX19 Service And Parts Manual

Section 3 - Service & Repair
E
M E R G E N C Y
The Emergency Lowering Valve Knob is located
beside the ladder at the rear of the machine.
Open the Emergency Lowering Valve by pulling
and holding the knob.
To close, release the knob. The platform will not
elevate if the Emergency Lowering Valve is
open.
Proximity Switch
The Proximity Switch cuts power to the High Speed Drive
when the platform is elevated. The switch is located on
the left side of the chassis at the rear of the machine.
No adjustment of the switch should be necessary.
Level Sensor
I
NTRODUCTION
The Level Sensor has three wires: red-power (24 v in),
black-ground, white-output (24 v out). To verify that the
sensor is working properly, there is one LED under the
sensor that indicates the sensor is off level.
A
DJUSTMENT
1. Place the machine on a firm level surface ± ¼°.
2. Use the Inclinometer (P/N: 010119-000) to ensure front
and rear of chassis is level ± ¼°.
3. Adjust the three leveling locknuts until the bubble is
centered in the circle on the attached bubble level.
T
EST
Raise the platform approximately 7 feet, then push the level sensor to the side. The red LED should turn
on, and the tilt alarm should sound.
L S
EVEL ENSOR
These units are sealed and pre-set, and require no
recalibration or adjustment.
503727-002
D V
O W N A L V E
( M/C 51250+)
NUMBER
Figure 3-7: Emergency Down Valve

Emergency Down Valve

Down Limit Switch
Hydraulics
Page 3-11