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Service Manual – SW5500, FLOORTEC R 985
52 - Hopper System
Troubleshooting
Trouble
Possible causes
Remedy
The hopper does not dump.
The hopper is too low.
Lift the hopper at a minimum height of 13,7 in
(350 mm).
Hopper lifted sensor (S2) miscalibrated or
broken.
Adjust/replace
Dumping valve (EV3) faulty
Replace
The hopper does not give a signal of being
closed.
Hopper open sensor (S1) miscalibrated or
broken.
Adjust/replace
The hopper does not give a signal of being
lifted.
Hopper lifted sensor (S2) miscalibrated or
broken.
Adjust/replace
The hopper does not give a signal of being
turned.
Hopper dumping sensor (S3) miscalibrated
or broken.
Adjust/replace
The hopper will not raise.
Hydraulic system oil level incorrect.
Check the hydraulic system oil level in the
tank.
Operation on sloping surface
Move the machine to level ground
Hopper pump (M3) fault
Replace
Raising valve (EV1) faulty
Replace
The hopper does not lower.
In case of low temperatures, the hydraulic
system oil is slow in flowing through the
safety valve.
Wait a few moments to let the hydraulic
system oil flow.
Hopper rotated
Return it to the closed position
Hopper dumping sensor (S3) disconnected/
broken
Connect / replace
Lowering valve (EV2) faulty
Replace