CHECKS
Does diagnostic display screen A1 display voltage for problem system handle in neutral position?
PROBLEM 27
System pump will not return to neutral.
POSSIBLE CAUSES
System pump control handle is worn. System pump EDC
is worn or out of adjustment. System pump is bad.
No
Yes
Repair or replace system
control handle or wiring.
With system handle in neutral, does diagnostic display screen
FUNCTION display command activity for pump?
Consult the Manitowoc
Crane Care Lattice Team.
Does system pump EDC manually
return to neutral? (See Test 10—
Manually Stroking the Pump.)
Adjust pump neutral.
(See Test 19—Setting
Pump Neutral.)
Repair or replace
system pump.
Does system pump EDC manually return to neutral?
(See Test 10—Manually Stroking the Pump
.)
No
Yes
No
Yes
No
Replace system pump EDC.
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