CHECKS
Does Diagnostic screen show a percent for problem handle in neutral position?
PROBLEM 21
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 system
control handle or wiring.
With system handle in neutral does Diagnostic screen
show command activity for pump?
Does system pump EDC manually
return to neutral? (See Section 3 -
Checking Electrical Inputs/Outputs.)
Adjust pump neutral. (See Section 2 -
Pump Neutral Adjustment.)
Repair or replace
system pump.
Does system pump EDC manually
return to neutral?
NoYes
NoYes
No
Replace system pump EDC.
Consult Manitowoc dealer or
Crane Care Lattice Team.
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