Dump Door Cylinder; Hopper Dump Door Will Not Open Or Close (Part B); Hopper System - Nilfisk-Advance SR 1900 Troubleshooting Manual

HOPPER SYSTEM

TROUBLESHOOTING GUIDE
Troubleshooting Guide
Symptom
Hopper dump door will not operate open or close
Part B: Hydraulic Load Circuit
Note: To test the engine must be running at high speed and the hopper door (open/close)
switches pressed and held.
Dump door will not
operate open or close
Inspect for possible
mechanical binding at:
•Dump door & hopper
frame opening
•Dump door cylinder &
linkage
Repair or replace
damaged parts. Does
the door function ?
*Note: The engine must be shut off to remove and disassemble any valve
cartridge.
48 - FORM NO. 56043129 - SR 1900
No
Yes
* Remove &
disassemble the:
•L1 dump door open
or
•L7 dump door close
Cartridge valve
•Inspect, clean and
reinstall
Does the door
function?
No
Replace the
defective
•L1 door open
No
or
• L7 door close
cartridge valve.
Does the door
function ?
No
Replace the
hydraulic
hopper door
cylinder