Manitowoc 999 Service And Maintenance Manual

Reference Only
Manitowoc Published 05-16-17, Control # 233-03 10-3
999 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
10
TROUBLESHOOTING CHARTS
Problem 1
Engine will not turn over to start.
POSSIBLE CAUSES
Dead battery; Loose connection on battery; Starter, Start
solenoid (MS1) relay, or Starter solenoid (SS) is faulty.
CHECKS
Check for voltage at battery terminals while attempting to turn over engine. (See Test 1.)
10 volts DC or more 10 volts DC or less
Check 90 amp circuit breaker CB1.
If Good If Bad
Check battery static volts. (See Test 1.)
12 Volts DC or more
12 Volts DC or less
Replace circuit breaker.
Charge or replace battery.
Check fuse F1.
If Good If Bad
Check electrical connections in starter circuit from
battery to starter.
Connections Good Connections Bad
Check cab start switches and
starter circuit connections.
Clean connections
or replace starter.
Replace fuse.
Check start solenoid (MS1) relay.
If Good
If Bad
Replace start solenoid (MS1) relay or wiring.
Check starter solenoid (SS) and starter motor.
If Good
If Bad
Repair or replace solenoid (SS) or motor.
Disengage clutch and attempt to start engine.
Engine Turns
Engine Does Not Turn
Pump or drive damage.
Disassemble and investigate.
Engine or flywheel is damaged. Disassemble and investigate.
(See engine manual.)

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English