LOFA EP250 Operation and Troubleshooting
463-3000-01 Rev C.1 - 28-Feb-2007
7
Warning
Low oil pressure is an indication of engine wear,
not an accurate indication of low oil level.
Note
Senders and gauges must be matched to indicate correctly.
Most senders are grounded through the sender body.
Do not use insulating sealant (i.e. Teflon tape) when installing senders.
Temperature Gauge
The gauge measures engine temperature with a resistance sender on the engine referenced to ground.
When a sender/switch combination is used on the engine, the marking
G
generally indicates the gauge
terminal. The gauge expects a high resistnace for low temperatures and a lower resitance for higher
temperatures. If the gauge is not connected to the sender, the gauge will read 0. A defective sender or
shorting the gauge input to ground will cause the gauge to read full scale (pegged). When using
sender/switch combinations, swapping the
WK
and
G
terminal prevents the gauge from working and may
cause unintended shutdowns.
Warning
If the temperature sensor is not in contact with coolant due to coolant loss
the gauge will not accurately indicate engine temperature.
Note
Senders and gauges must be matched to indicate correctly.
Most senders are grounded through the sender body.
Do not use insulating sealant (i.e. Teflon tape) when installing senders.
Some thermostat housings are composites and do not provide ground for the sender.
Hourmeter
The hourmeter is connected to the fuel run/stop solenoid output. If the hourmeter does not count in the run
position, this may indicate a faulty hourmeter or a problem with the solenoid circuit. If the engine shutsdown
or is not started within 10 second the hourmeter stops counting.
Additional Gauges
Additional gauges can be added by removing blind covers and installing the gauge. Power connections are
provided with the standard configuration.