Nilfisk-Advance Advance Retriever 2060 Service Manual page 55

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TROUBLESHOOTING GUIDE (CONTINUED)
TROUBLESHOOTING CHART
Symptom
1 All hydraulic functions sluggish
2 Wheel drive in one direction only
3 Main broom, side broom and
impeller do not operate
4 No wheel drive in either direction
HYDRAULIC SYSTEM
Possible cause
Engine not operating in high idle or
engine idle too slow.
Inspect propulsion pump relief valves for
damaged or broken springs, valve held off
seat, damaged valve or excessive system
pressure.
Check if front gear circuit is exceeding
2500PSI. Check relief valve in relief block.
Check that bypass valve is in correct
position. Check operation of foot pedal
to propulsion pump arm.
FORM NO. 56043051 / Retriever ™ 2060 - 53