CHECKS
Does the Diagnostic screen show a percent for the problem handle in the neutral position?
PROBLEM 21
The system pump will not return to neutral.
POSSIBLE CAUSES
System pump control handle is worn, system pump EDC is damaged, system
pump is damaged, pump is not centered.
NoYes
Repair or replace the system
control handle or wiring.
With the system handle in neutral does the Diagnostic
screen show command activity for the pump?
Does the system pump EDC manually
return to neutral? (See Section 3 -
Checking Electrical Inputs/Outputs.)
Adjust the pump to neutral. (See Section
2 - Pump Neutral Adjustment.)
Repair or replace the
system pump.
Does the system pump EDC manually
return to neutral?
NoYes
NoYes
No
Replace the system pump EDC.
Consult your Manitowoc dealer or the
Crane Care Lattice Team.
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