All Copyright and rights are the property of Johnston Sweepers Ltd
MA8:7
V Range 501
l
651
l
801 Maintenance Manual
Johnston Sweepers Limited
Chapter - Fault Diagnosis
Maxigap Nozzle
Fault Symptom
Possible Cause
Maxigap will not tilt
1.
Check feed to pneumatic solenoid/Plug LED V1 or V9
if a dual.
2.
Pneumatic
solenoid
valve
faulty.
3.
Cylinder
pivot/linkage
seized.
Channel Brush
Fault Symptom
Possible Cause
Rotating slowly
1.
Motor worn.
2.
Hydraulic
pump
worn.
4.
Channel
brush
worn.
3.
Check hydraulic pressure to aid fault diagnosis.
Works intermittently
1.
Check switch in Control Panel and looms for loose
connections.
Brush fails to lift
1.
Check for electrical power at solenoid/Plug LED V5 or V6 if
a dual.
2.
Check pneumatic solenoid for correct operation.
3.
Seals
in
cylinder
leaking.
Page Issue A
