Vacuum Converter
- Disconnect hose, with vacuum damper attached to it, from front of vacuum converter. Connect a vacuum gauge to vacuum converter in place of hose.
- Start the engine. Vacuum should be 12.4-14.2 in. Hg. Disconnect link-rod from vacuum converter lever.
- With engine idling, move converter lever slowly and smoothly in direction of acceleration for injection pump lever.
- Vacuum gauge indicator should drop slowly without any jerking. If not, replace pump and converter assembly. Check the factory adjustment of vacuum converter. Reconnect link-rod to vacuum converter lever.
- Hook up tachometer. Connect vacuum gauge to vacuum converter in place of hose with vacuum damper attached to it.
- Accelerate slowly until engine reaches 4550-4650 RPM. Vacuum should be 0.0 in. Hg. If not, replace pump and converter assembly.