Page Issue 01
Chapter - Fault Diagnosis
14:7
VT551 - Maintenance
CHANNEL BRUSH
FAULT SYMPTOM POSSIBLE CAUSE
Brush slows down after 1. Hydraulic pump worn
2. Channel brush motor worn
3. Check hydraulic pressure for fault diagnosis
Works intermittently 1. Check switch in control panel and looms for
loose connections - using J-plex
2. Check hydraulic valves Y1 (LH) or Z1 (RH)
Brush fails to lift 1. Check for electrical power at solenoid/plug LED
V5 (LH) or V10 (RH) if a dual
2. Check pneumatic solenoid for correct operation
3. Seals in cylinder leaking
MAXIGAP NOZZLE
FAULT SYMPTOM POSSIBLE CAUSE
Maxigap will not tilt 1. Check feed to pneumatic solenoid/plug LED V8
(LH) or V7 (RH) if a dual
2. Pneumatic solenoid valve faulty. - check manual
override
3. Cylinder pivot/linkage seized
To Next Page
Loading...
