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Vacuum Converter

  1. Disconnect hose, with vacuum damper attached to it, from front of vacuum converter. Connect a vacuum gauge to vacuum converter in place of hose.
  2. Start the engine. Vacuum should be 12.4-14.2 in. Hg. Disconnect link-rod from vacuum converter lever.
  3. With engine idling, move converter lever slowly and smoothly in direction of acceleration for injection pump lever.
  4. 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.
  5. Hook up tachometer. Connect vacuum gauge to vacuum converter in place of hose with vacuum damper attached to it.
  6. Accelerate slowly until engine reaches 4550-4650 RPM. Vacuum should be 0.0 in. Hg. If not, replace pump and converter assembly.
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