Nilfisk-Advance 56110000, Руководство по обслуживанию

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60 - FORM NO. 56043124 - Condor XL
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ELECTRICAL SYSTEM
TROUBLESHOOTING NOTES FOR SCRUB LIFT CYLINDER OVERVIEW
Problem: Scrub deck pressures will not change inoperative in its three settings
Possible causes
Things to check
Electrical control circuit
• Check coil resistance on both L5 & L7 solenoids (spec 2.2 Ohms).
• Check solenoid wiring continuity from main controller for both L5 & L7
• Using an AMP clamp check both solenoids current draw (Ref. chart for speci fi cation).
• Substitute a new main controller (driver box) if solenoid coils and wiring check good but no current is found when activating scrub deck
pressure circuit function.
• If electrical control circuits test OK see possible causes for the Hydraulic load circuit problems.
Hydraulic load circuit
• Inspect for binding and any possible mechanical damage to the deck lift cylinder and deck lift linkage.
• Remove the S5 & S7 scrub lift cylinder valve cartridges from its manifold.
• Inspect, clean and operate the cartridges out side of the manifold if functional reinstall.
• Connect a hydraulic pressure gauge at the test ports TP4 & TP5 and check system operating pressures (see chart for speci fi cations).
• If after replacement of a valve cartridge(s) and the deck pressures still do not function correctly, replace the hydraulic lift cylinder.