Checking Pneumatic Governor of Injection Pump For Leaks

Checking pneumatic governor of injection pump for leaks (engine 615, 616)

Test values
Vacuum 70-90 mbar (50-70 mm Hg)

Conventional tools
Vacuum meter, connecting nipple


Checking




1 Unscrew vacuum line on governor of injection pump.

2 Screw in connecting nipple (2).

3 Push adjusting lever on injection pump completely forward to stop and plug on test hose (1).

4 Release adjusting lever and read test value.

5 Watch vacuum meter for constant pressure.

6 If pressure drops, the double thread connection for the vacuum line, the O-rings for the tickler shaft, the regulator housing or the regulator diaphragm may be leaking. Remove leaks, if any, or replace diaphragm of injection pump.