Engine Does Not Crank-Flowchart 6A - WACKER Group LTC 4 Repair Manual

LTC Repair
6.2 Engine Does Not Crank—Flowchart 6A
Engine Does Not Crank
Check battery voltage.
Does
battery measure
11.0–13.0V?
No
Recharge or
replace battery.
Consult
Yes
Caterpillar
engine repair
manual.
wc_tx000476gb.fm
Caterpillar Engine Troubleshooting
Yes
Reconnect
black wire.
Clean and
tighten connections.
Repair wiring
from terminal 30
to battery.
Check for battery voltage
between Or/B wire at starter
solenoid and ground when
key is in START position.
Is battery
voltage measured
between black wire
and ground?
No
Repair/replace
Or/B wire.
Checking Keyswitch and Wiring
Check connection of Or/B wire at
starter solenoid. Also check wire
connections at back of keyswitch.
No
connections clean
No
Check for battery voltage between
terminal 30 of keyswitch and ground.
voltage measured
No
Check for battery voltage between
terminal AC of keyswitch and ground
when key is placed in the START position.
voltage measured
Yes
Replace keyswitch.
79
Is
the Or/B wire
connected?
Yes
Are
and tight?
Yes
Is battery
between 30 and
ground?
Yes
Is battery
between AC and
ground?
No
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