Manitowoc 2250 Service Maintenance Manual

Reference Only
TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-2
Published 07-19-16, Control # 249-01
GENERAL GUIDELINES
The following guidelines apply to all troubleshooting
operations:
• Do not remove cylinders or counterbalance valve(s)
from a cylinder until its working unit is restrained against
movement.
• Do not use your hands to check for hydraulic oil leaks.
Use a piece of cardboard to check for such leaks.
• Use gauges of the correct pressure range when
checking hydraulic circuits.
• Use the standard test plug adapters (available from the
Manitowoc Crane Care Lattice Team) for electrical
testing.
• Check ground potentials when testing electric circuits for
continuity, voltage, or resistance. When checking
voltages, use the ground point for the circuit being
checked. If voltage does not register on the multimeter,
use a known ground. If a value is read, the ground of the
circuit being tested is probably faulty.
• Check all terminal points for cleanliness and tighten
connections.
• Check pressures at the specified hydraulic component
ports.
• Check the motor pressure control pilot (PCP) valve on
the motor being tested. Test the pump electric
displacement controls (EDC) on the pump being tested.
• Check each pressure sender electric supply at the
system sender.
• Check the encoder electric supply at the test plug
adapter of the encoder being tested.
• Check the correct operating limit electric supply by
viewing the diagnostic display in the operator's cab.
• Check the control handle electrical input and output
voltages at the control handle being tested.
• Check the basic system electric supplies and cab power
relay at the fuse box mounted above the main electrical
junction box in the operator’s cab.
• Check the programmable controller (PC) input and
output cables at the connector pins.
TEST EQUIPMENT
Test equipment shown or described is available for testing
the crane’s hydraulic or electrical systems. The test
equipment can be purchased in kit form (with or without
carrying case) or separately by contacting the Manitowoc
Crane Care Lattice Team.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English