TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 1 of 2)
PROBLEM NO. 15
LOW HYD OIL LEVEL REMAINS ON
INDICATOR LIGHTS
(PRE START)
Engine not running. Hydraulic tank oil level normal (check sight gage on side of tank).
POWER switch ON.
This circuit uses a normally-dosed (N. C.) magnetic float switch which is open when the float is pushed up by sufficient oil in the tank. Power to the
circuit is supplied from the alternator relay terminal 2 when the POWER switch is turned to ON. The circuit is deactivated after the engine starts.
LOW HYDRAULIC OIL LEVEL CIRCUIT
Go on to Sheet 2