Dover HEIL LIBERTY TP1L-SM-0520, Руководство по обслуживанию

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Issued May 2020
Maintenance and Adjustment
Copyright 2020, Heil Environmental
Printed in the U.S.A.
Maintenance and Adjustment
87
PACKER, TAILGATE, AND BODY VALVE TROUBLESHOOTING
Packer doesn’t move
Operate manual overrides on packer pilot valve.
Packer now moves? – Check for electrical problems such as wiring, solenoid coil, and current from controller, or
pressure switch failure.
Packer doesn’t move?
Operate tailgate.
Tailgate moves? – Replace solenoid (blocker) valve #4.
Tailgate doesn’t move? – Check for bad pump or relief valve #5
Packer operates but tailgate and/or body raise does not.
Remove valve #4 and replace with an SAE-10 plug. Run truck BRIEFLY to operate the tailgate or body raise function.
Shut truck down as soon as possible.
Tailgate or body raise operates? – Check for wiring, bad coil or bad solenoid (blocker) valve #4.
Tailgate or body raise doesn’t operate?
Start truck again and run BRIEFLY to operate manual overrides on tailgate or body raise valve. Shut truck down as
soon as possible.
Tailgate or body raise now moves? – Check for wiring, coil or controller problem.
Tailgate doesn’t move? – Replace logic valve #3
Packer operates but has insufficient force or speed
Install pressure gage and “bottom out” the tailgate lower function.
Main relief #5 should be set for 2400 PSI. Adjust as required.
If 2400 PSI is not obtainable, replace relief valve #5. Then, if not obtainable, replace pump.
Packer blade “falls away” while body is elevated
Replace check valve #2
Packer operates OK, but is slow to start after operation of tailgate or body raise.
Clean orifice #14.
NOTICE
If spools are sticking, operation of manual overrides can free them.