PUMP GP-PISTON 1458687 - Caterpillar

2-1 Structural Diagram
2-2 Function
(1) General Electric circuits for this model are DC24V minus grounding consisting of starting circuit, charging circuit and low current circuit.The starting circuit is to start the engine.The charging circuit operates while engine is running which charges the battery and also supplies current to the low current circuit.The low current circuit receives current from the battery or charging circuit and operates all electrical units. (2) Functions 1. Starting circuit Consists of battery (40), battery relay (20), starter (42), magnetic switch (17), starting switch (6) and circuit breaker (18), and starts the engine.2. Charging circuit With alternator (44) mounted on the engine, charging circuit charges battery (40) and also feeds current to the low current circuit through fuse box (36).3. Low current circuit 1) Light (head and boom) citcuit Turns lights (29) for head and boom on.2) Fuel meter circuit and water temperature meter circuit and air pressure meter circuit Indicate the volume of fuel remaining in the tank and temperature of the engine coolant, and air pressure in the hydraulic oil tank.3) Hourmeter circuit Indicates the engine running hours.4) Wiper circuit and washer circuit Wipes off dirts on the front wind shield of cab.5) Air horn circuit Blows the air horn.6) Radio circuit Receives FM and AM frequency radio broadcast.7) Cigar lighter circuit Electrically heats a coil used for lighting cigarettes.8) Cab heater circuit Drives heater fan to heat inside the cab.9) Room lamp and