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American Bosch governor questions


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'83 R686  with a E6-300. When driving and trying to maintain a constant speed, say 50mph, the engine is constantly "hunting" or surging. Linkage/ Throttle arm look good and feel ok. 

I removed the governor assembly from the pump and disassembled it, nothing seemed abnormal or wore out. Is there anything in particular i should look for?

The gear that drives the governor has what looks to be a slip clutch on it, What is the proper way to set it?

The truck idles ok and pulls good with plenty of power, its just hard to drive due to the surging and it gets worse with light to no load on the engine. 

The pump is an American Bosch type APE6bb110T6978.

Thanks,

Jim

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7 hours ago, jimtruck said:

'83 R686  with a e6-300. When driving and trying to maintain a constant speed, say 50mph, the engine is constantly "hunting" or surging. Linkage/ Throttle arm look good and feel ok. 

I removed the governor assembly from the pump and disassembled it, nothing seemed abnormal or wore out. Is there anything in particular i should look for?

The gear that drives the governor has what looks to be a slip clutch on it, What is the proper way to set it?

The truck idles ok and pulls good with plenty of power, its just hard to drive due to the surging and it gets worse with light to no load on the engine. 

The pump is an American Bosch  type APE6bb110T6978.

Thanks,

Jim

Needs to go to a pump shop for calibration. Usually pins and bushing wear causes that along with spring pressure. It's a balancing act inside the governor and everything has to be closely aligned.

Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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2 hours ago, Rob said:

Needs to go to a pump shop for calibration. Usually pins and bushing wear causes that along with spring pressure. It's a balancing act inside the governor and everything has to be closely aligned.

There is one simple thing to check before you go ripping the pump off for repair ask Rob has stated! Check to be sure the throttle lever isn't worn at the spring in the lever its self! this being worn can cause issues at idle as well just something cheap and easy to check before going all out!

 

Just  something else to look for!

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