-36-
Fuse(5A
・
20A
・
50A)
Overheating occurs frequently.
Is the quantity of cooling
water as specified?
Are the radiation fins of the
radiator free from clogging?
Is the cooling fan
rotating normally?
Water supply/replenishment
The volume of water is approx.11L.
Use preservative together.
Exercise care so as not to damage
the radiation fins during cleaning.
Refer to the wiring diagram and hydraulic circuit.
Step control changeover switch is above
the electric equipment box in LH side cover.
Electric cylinder clamp . Cylinder mounting
shaft . Step mounting base shaft ass’y
Changeover switch wiring
Cleaning
Inspection of hydraulic
and electrical pages.
Failure of engine
(Failure of pump)
(Failure of water temperate
sensor)
Change to “AUTO”.
Replacement of fuse.
Replacement by normal parts.
Replacement of switch.
Breakage of bearing
Failure of electric cylinder
Defective connection of wiring
Is the control switch
in the “AUTO” position?
The step will not swing
on a slope.
Is the fuse normal?
Is the step/electric cylinder
support shaft normal?
Is manual operation possible?
YES
YES
YES
NO
YES
YES
YES
YES
Refer to the engine operation manual.
Refer to the wiring diagram.
NO
NO
NO
NO
NO
NO
23-4. Overheating
23-5. Step trouble
