Clark ESX25 - SCR Traction Control

6.20
WARNING
Be sure to make a record of all maintenance and operating
problems you fi nd. Do not attempt to make repairs unless
you are a trained authorized mechanic.
Test for correct function of the traction control. Check creep speed,
maximum speed, and plugging.
1. Check creep speed and maximum speed while driving the truck
in a straight line in both forward and reverse directions. All speed
changes should be smooth while increasing and decreasing speed.
Notice any unusual drive train noise or action of the controls and
drive train components.
Stop the truck with the parking brakes. Note any unusual reactions in
driving or braking performance. Note any need for adjustment.
2. Check the plugging function fi rst at a slow speed. If operating cor-
rectly then test at full speed.
First drive the truck in the FORWARD direction. Move the multi-func-
tion handle to the forward position and allow the truck to accelerate
to the desired travel speed. Then, move the multi-function handle
to the REVERSE position. The truck should slow to a smooth,
controlled stop and accelerate in the opposite direction.
Repeat the test by moving the direction control back to the forward
position.
Check the multi-function control while conducting the speed range
tests. It must move easily and smoothly throughout the acceleration
stroke and return without binding.
Test the brake (drive motor cut-off) switches. From a stopped posi-
tion, lift your heel off the brake pedal, this should shut off the power
to the drive motors and prevent movement when the control handle
is operated.
Check the steering potentiometer, to do so drive the truck slowly forward
while turning the steer tiller. Each inside drive wheel (drive motor) must
stop rotating (cut-off) when the steer wheel is turned at a sharp angle
and should then reverse direction. The truck travel speed will reduce
when the steer wheel is turned at a sharp angle.
SCR Traction Control
When you have completed the operational tests, park and
leave the truck according to standard shut down procedures.
TRACTION CONTROL