Table 2-1. Controls and Instruments

Engine oil pressure safety switch

6. Control panel lamp

11. Discharge pressure gage

Coolant temperature safety switch 7. Engine oil pressure gage

12. Engine starter pushbutton

8. Choke control

13. Battery disconnect switch

Engine coolant temperature gage

9. Suction gage

14. Ignition switch

Throttle knob

10. Tachometer-hourmeter

15. Low oil pressure reset

Figure 2-2. Control panel controls and instruments.

Table 2-1. Controls and Instruments

Fig. &

index No.

Name

Operation and use

2-2

Indicates battery rate of charge or discharge. Charging rate may be higher

immediately after starting but should taper off to near zero with continued operation.

Immediately check cause of discharge indication that occurs during operation.

2-2

Coolant temper- Indicates the temperature of engine coolant during operation. Normal warmed-up

ature gage

reading is 180to 200F.

2-2

Throttle knob

Controls engine speed between idle and governed speed. When pushed in, it causes

the engine to operate at idle speed. When pulled out fully, it causes engine to run at

full governed speed. Intermediate settings provide intermediate engine speeds.

2-2

Control panel lamp Provides illumination for control panel when operating during hours of darkness.

2-2

Engine oil pres-

Indicates engine oil pressure. At idle, oil pressure must exceed 7 psi. At governed

sure gage

speed, oil pressure must be 20 to 30 psi.

2-2

Choke control

When pulled out, the choke control supplies an extra-rich fuel mixture to the engine to

facilitate engine starting and warmup. When pushed in fully, it restores normal fuel

mixture for running the engine.

2-3