Manitowoc 2250 Service Maintenance Manual

Reference Only
Manitowoc Published 07-19-16, Control # 249-01 10-33
2250 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
10
CHECKS
Check for 241 bar (3,500 psi) pressure at auxiliary system disable valve while enabling any
upper valve assembly components. (See Test 24—Checking and Adjusting the Auxiliary
System Working Pressure.)
PROBLEM 31
Upper and lower valve cylinders are not operating.
POSSIBLE CAUSES
Faulty relief valve, auxiliary system disable valve, switch, or wiring. Fan
circuit component failure. Pump is bad. Wiring problem.
241 bar (3,500 psi) or Less
241 bar (3,500 psi) or More
21 bar (300 psi) or Less
Check pressure at pilot/brake pressure
relief valve. (See Test 23—Checking the
Hydraulic Brake Pressure.)
Are fan impellers turning?
Yes No
Adjust or replace pilot/brake pressure
relief valve. (See Test 23—Checking the
Hydraulic Brake Pressure.)
Check fan circuit for component failure.
Adjust auxiliary system working pressure. (See Te s t
24—Checking and Adjusting the Auxiliary System
Working Pressure.) Are cylinders operating correctly?
No
Repair or replace auxiliary system disable valve.
Enable any upper valve assembly component in
both directions and check that voltage is present
at auxiliary system disable valve.
Voltage
No Voltage
Yes
No
Does diagnostic display screen D1 (bank 3)
change by 4 when enabling any auxiliary
system valve?
Repair or replace wiring.
Yes
No
Is crane setup mode selected and confirmed at
operator display?
Replace fuse F13 or power switch or wiring.
Select and confirm Setup mode.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English