Page Issue 01Chapter - Fault Diagnosis14:6
VT551 - Maintenance
WIDE SWEEP BRUSH
FAULT SYMPTOM POSSIBLE CAUSE
Not rotating 1. Worn drive adaptor and plate
2. Bearings seized
3. Motor seized
4. Foreign matter jammed in brush
5. Check electrical feed to solenoid/Plug LED valve C
6. Check hydraulic system for pressures for diagnosis of
problem
Rotating slowly 1. Motor worn
2. Hydraulic pump worn
3. Brush end bearing seized
4. Incorrect oil flow and/or pressure
Bouncing 1. Regulator adjustment incorrect
2. Brush stock bent
3. Linkage pins/brackets worn/damaged
4. Air damping system not working
Not dropping 1. Check feed to solenoid/Plug LED V23 and V24
2. Solenoid faulty use man override
3. Switch on control box faulty - check using J-plex
4. Linkage/pivots/cylinders seized
Lifts intermittently 1. Faulty or loose electrical connections while in working
mode - check using J-plex
2. Check solenoid using manual override
Air leaking from Wide Sweep Brush 1. Shuttle valve or regulator defective
2. Lift ram seals worn
Brush not slewing - 1. Check slew cylinder for damage/corrosion
dual sweep machines 2. Solenoid V23 (LH) or V24 (RH)
3. Check slew ram for air leaks
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