JS07N·JS07·JS08·JS12·JS14
49
Maintenance
Pothole Limit Switches
33. Place a wooden block approximately 5cm
tall under the right pothole guard.
34. Press the raise function button, attempt
to raise the machine 2m.
⊙ Result: The pothole guard contacts the
block and does not fully deploy. The diagnos-
tic LCD displays "18". The alarm sounds and
the platform will lift to 2m or beyond. The ma-
chine is function properly.
¤ Result: The pothole guard contacts the
block and does not fully deploy. The diagnos-
tic LCD does not display "18". The alarm does
not sound and the machine will continue to lift
the platform. Adjust or replace the pothole
limit switch.
35. Press and hold the drive/steer function
enable switch on the control handle. At-
tempt to drive and steer the machine.
⊙ Result: The diagnostic LCD displays "18".
The alarm sounds, and the machine will not
steer or drive. The machine is functioning
properly.
¤Result: The diagnostic LCD does not dis-
play "18". The alarm does not sound and the
steer and drive functions operate. Adjust or
replace the pothole limit switch.
36. Lower the platform to the stowed position
and remove the block under the right pot-
hole guard.
37. Repeat this procedure beginning with
step 31~34 for the left pothole guard.
38. Lower the platform to the stowed posi-
tion, remove the block under the left pot-
hole guard.
39. Turn off the machine.
B-15
Test the Up Limit Switch (if equipped)
This procedure should be performed every 250
hours or quarterly, whichever comes first.
Maintaining the limit switches is essential to
safe operation and good machine performance.
Operating the machine with a faulty limit switch
could result in reduced machine performance
and a potentially unsafe operating condition.
Perform this procedure with the machine on a
firm, level surface that is free of obstructions.
1. Turn the key switch to ground control and
raise the platform approximately 2.5 m
from the ground.
2. While raising the platform from the ground
controls, push the arm of the up limit
switch.
Result: The platform stop raising, and the ⊙
machine is functioning properly.
¤ Result: The platform continues to rise. Ad-
just or replace the maximum drive height limit
switch.
Checklist C
C-1
Calibrate the Platform Overload Sys-
tem (if equipped)
This procedure should be performed every
500 hours or six months, whichever comes
first OR when the machine fails to lift the max-
imum rated load.
Testing the platform overload system regu-
larly is essential to safe machine operation.
Continued use of an improperly operating
could result in the system not sensing an
overloaded platform condition. Machine stabil-
ity could be compromised resulting in the ma-
chine tipping over.
The platform overload system is designed to
prevent machine operation in the event the
platform is overloaded. It provided with two
control components: the overload pressure
transducer and the scissors angle sensor.
The overload pressure transducer is used to
determine the pressure of the cylinder and
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