New Holland LS140 Workshop Manual page 567

STARTER MOTOR TROUBLESHOOTING
Use the diagnostic charts as a guide when repairing
the starting system. Before diagnosis, be certain the
battery is fully charged and inspect the starter and
battery cables for clean and tight connections.
IMPORTANT: Do not operate the starter longer than
30 seconds at a time.
Do not disconnect or short any lead wire while the
starter is operating.
With key switch in "start" position:
Starter does not crank engine, solenoid switch
clicks.
1. Disconnect the three cables from the solenoid.
2. Using an ohmmeter, touch one probe to the
solenoid spade terminal and the other to the
starter case. There should be continuity.
If none, the hold-in winding is open-circuited.
Replace the solenoid.
If continuity, the fault is in the starter motor. Refer
to repair procedures.
Starter does not crank engine, solenoid does
not click.
1. Disconnect battery cable from starter.
2. Connect a jumper wire to the battery positive
post. Ensure the negative cable is attached to
battery and starter ground.
SECTION 55 - ELECTRICAL SYSTEM
3. Briefly touch the jumper wire to the spade
Starter cranks engine very slowly.
1. Check battery condition, should be a minimum of
2. Check starting system circuit.
3. If battery is charged and voltage is within
Engine starts but pinion does not disengage.
1. Check voltage at spade terminal of solenoid. If 12
2. If 0 volts with key switch "off" but starter turns,
55-142
terminal on the solenoid.
If the solenoid clicks, the probable cause is in the
key switch, relay or wiring.
If the solenoid does not click, replace it.
12.5 volts.
Voltage drop between battery positive post and
starter terminal should not exceed 0.2 volts.
Voltage drop between battery negative post and
starter ground should not exceed 0.2 volts.
If voltage drop exceeds 0.2 volts, clean
connections or replace the cable.
specification, repair or replace starter.
volts with key switch "off", fault is in the key switch
or start circuit.
fault is in the solenoid or overrunning clutch
assembly.
Copyright © New Holland