Manitowoc National Crane 500E2 Service Manual

8-6 Published 08/16/19 Control # 112-05
TROUBLESHOOTING 500E2 SERVICE MANUAL
Downhaul weight lifting the
anti-two-block weight
Press HCA override switch and
boom down 5° with no load.
Overload trips and does not reset
Has overload been eliminated?
Lower downhaul weight
Crane booms down,
telescopes out, hoists up?
Boom lift cylinder
fully extended?
Resistance across
solenoid?
12 V to solenoid?
12 V across
pressure switch?
Fuse OK
Problem Solved
12 V across
pressure switch?
Crane booms down,
telescopes out,
hoists up?
Replace
solenoid valve
Replace fuse
Replace
wiring
Not all functions work
Valves sticking?
Clean or replace
Problem solved
Yes
No
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
No
Yes
HCA TROUBLESHOOTING FLOW CHART
Eliminate overload
Sticking spool
clean or replace
Troubleshoot
wiring
No
Yes
Functions operate
Problem Solved
Yes
No
12 ohm
Yes
No

Manitowoc National Crane 500E2 Specifications

General

Brand	Manitowoc
Model	National Crane 500E2
Category	Construction Equipment
Language	English