It can test the double spring injectors and usual injectors .

A: Internal pressure meter.

B: Air supply meter.

C: Air supply throttle.

   -If the throttle whirls in clockwise, quantity of air input will be less, and oil input is lessas well. Inverse, the input oil will increase.

D: Governor valve

   -If the governor valve circumgyrate to the bottom, rate of oil pressure and air pressure is 100:1. For example, when air pressure 7kg, the oil pressure will be 700kg.

E: Air switch valve.

   -The air valve is opened by pulling, and closed by pushing.