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Old 11-20-2020, 08:50 PM   #1
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C8.3L Bosch 7100 Throttle Lever

My throttle lever has slid off the Fuel Pump Throttle pin (the red circled area below) twice now.

That means no throttle for the engine except for maybe a 2 mph constant speed. Evidently others have had their fuel lever clamp break off. https://www.irv2.com/forums/f123/thr...er-242573.html

I have identified the Cummins Fuel Lever Cummins part# 4920051 as a replacement.

Here is my Fuel Lever. The Red Dot marks the attachment point for my TPS link.

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Below is the Cummins 4920051 that is commonly sold.

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My Throttle lever is similar except it has a 1/4 x 28 bolt welded to the top of the clamp which is where the TPS sensor link is attached.

Does anyone have a part number for my style Cummins fuel lever?

(Note: My Gillig Bus Chassis manual shows a significantly different throttle link than is displayed in the two above pictures. This is an Air Throttle link.)
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Old 11-24-2020, 07:22 PM   #2
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Dean have you contacted Gillig Parts? They were very helpful to me in the past.
They sent me the pDF file for my complete chassis build and that has been extremely helpful in locating parts.

1996 Intrigue
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Old 11-25-2020, 06:48 AM   #3
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Is the problem just that the linkage will not clamp down properly on the shaft?

I can't see anything wrong with the linkage in the photo.

If it is a clamping issue, can you remove the "square spacer piece" in the photo (unless that is there for alignment), or grind a little material away on the inside face of the clamping surface so that you can tighten the linkage more (for more clamping force)?
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Old 11-25-2020, 11:48 AM   #4
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Mike, the photo is to show the TPS link that is attached to my throttle lever but not to the Cummins Lever that is available on the market.

The Throttle shaft has raised ridges from its base about 1/2 way to its smooth end.

My lever clamp does not slide onto the raised ribs fully and somehow after 23 years decided to slide off the shaft completely two times in the past two years. It seems that the ribs near the base of the shaft are taller than the area to which my clamp has fastened.

I also know that my lever clamp does not have that "spacer" you pointed to. Maybe that is what I need to fix this thing. I will give that a try also. The fuel injection pump was replaced by Cummins West about 17 years ago so perhaps the throttle lever attachment was modified them.

I will take a longer look at whether I need more clamping force or a more open gap to make the best fit. Then try to modify the clamp.

Thank you for the ideas.

Having read about these levers breaking in the referenced RV2 thread, I want to get a spare lever just in case.

I will try Gillig, but their schematic in the parts manual for my rig is vastly different from the Cummins lever that is in use on my rig.
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