Manitowoc 2250 Service And Maintenance Manual

Reference Only
TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-20
Published 11-06-15, Control # 040-13
PROBLEM 18
No swing operation, but engine loads.
POSSIBLE CAUSES
Mechanical hang-up; Solenoid failure; Wiring fault.
CHECKS
Check swing operation in both directions with brake and swing lock released.
Slight Swing Movement No Swing Movement
Check for voltage to swing lock solenoid valve.
Voltage
Check for voltage to brake solenoid with
swing park brake switch in off position.
No Voltage
Voltage
No Voltage
Repair or replace switch, fuse, or wiring.
Repair or replace wiring.
Check swing lock release solenoid for
magnetism with screwdriver.
Magnetic
Not Magnetic
Check solenoid coils for magnetism with screwdriver.
Magnetic
Not Magnetic
Replace valve.
Replace valve.
Replace valve.
Check charge pressure at swing lock
with a 0 – 500 psi gauge.
Repair or replace
swing lock.
300 psi or more
300 psi or less
YesNo
Enable manual override on brake valve. (See Te st
27.)
Does swing brake release.
Is swing brake release pressure 350 psi or greater?
(See Tes t
16.)
Check pressure at brake assembly with a
0 – 500 psi gauge. (See Te st
24.)
300 psi or more300 psi or less
Yes
No
No
Replace relief valve or pump.
Set pump charge pressure relief to 350 psi. (See Te st
19.) Is
350 psi obtained?
Repair or replace brake valve.
Repair or replace brake.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English