Terex Genie 20N RJ, Service And Repair Manual

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Service and Repair Manual September 2021
Platform Controls
16 Z®-30/20N • Z®-30/20N RJ • Z®-34/22 • Z®-34/22N Part No. 1268498GT
3 Locate the diode between the black/red wire
from the boom function speed controller and
the white/red wire. Disconnect the white/red
wire from the diode on the black/red wire.
4 Connect the negative lead from a multimeter
set to measure amperage to the wire
connector of the white/red wire. Connect the
positive lead of the multimeter to the diode on
the black/red wire.
5 Turn the boom function speed controller to the
creep position.
6 Set the threshold: Press down the foot switch
and move the primary boom toggle switch to
the up position. Adjust the amperage to 0.28A.
Turn the threshold trimpot adjustment screw
clockwise to increase the amperage or
counterclockwise to decrease the amperage.
7 Turn the boom function speed controller to the
9 position.
8 Set the max out: Press down the foot switch
and move the primary boom toggle switch to
the down position. Adjust the amperage to
0.65A. Turn the max out trimpot adjustment
screw clockwise to increase the amperage or
counterclockwise to decrease the amperage.
9 Start a timer and simultaneously press down
the foot switch and move the primary boom
toggle switch in the down direction. Note how
long it takes to reach 0.65A.
10 Set the ramp rate: Turn the ramp rate trimpot
to obtain a 2 second delay from 0 to 0.65A.
Turn the trimpot clockwise to increase the time
or counterclockwise to decrease the time.
11 Disconnect the leads from the multimeter and
connect the white/red wire to the diode on the
black/red wire.
Boom function speed controller specifications
Threshold
(controller turned to creep)
0.28A
Max out
(controller turned to 9)
0.65A
Ramp rate
2 seconds