The Ford Barn

Keith True · 06-28-2015, 05:26 PM

I have a Hoof governor for an A.I bought it years ago for something or other,I think it was for a customer,and the job never happened.It is a vacuum governor and is sandwiched between the carb and the manifold.Strictly vacuum,no mechanical linkage.Was this the one used on some production AA's???I just have no idea and would like to get it into the hands of the right people that would use it.

Bob C · 06-28-2015, 05:35 PM

They used them on the mail trucks. You can see the hole below the choke
rod where it went when the governor was installed. The other picture shows the bracket they made to lower the choke rod at the upper end.

Bob

Gold Digger · 06-28-2015, 05:35 PM

I have one of those but don't know if it's a Hoof brand. Mine came off of a welder and also had a mechanical governor that worked in conjunction with the vacuum governor. The one I have is said to be off of a B engine.

Rowdy · 06-28-2015, 07:31 PM

I have never seen a Hoof for the A before. Seen a couple of other brands that bolt to the timing cover. I think I still have a couple of the Kingstons in the parts pile. Rod

Steve Wastler · 06-28-2015, 08:12 PM

As Bob C says, Hoof governors were furnished and installed by the Post Office Garage's and used on both the A and AA. Will be marked on the side by model number 29-31 A or 29-31 AA. Yours appears to be a little newer application, but I'm viewing on my phone.

Keith True · 06-28-2015, 09:03 PM

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Where it says model,mine is marked,Ford A.Under that,where it says serial number,it is marked 1929-31.

Chuck Sea/Tac · 06-28-2015, 11:03 PM

So all mail trucks were equipped with this (or another) governor?

40 Deluxe · 06-28-2015, 11:33 PM

I believe these units were merely speed (RPM) limiters, not true governors. Engine speed was directly controlled by the foot pedal or hand lever up to whatever RPM the Hoof unit was set at (say3,000 RPM) as determined by the amount of air flow through the unit. At that point, air flow working against a spring would begin to pull closed the throttle plate in the unit to prevent the driver from overspeeding the engine.
A true governor, mounted on the timing cover or belt driven, maintained a certain desired RPM whether the engine was under full load or no load, or anything in between. The throttle plate in the carb was connected to the governor, not the foot or hand lever. The hand lever was connected to the governor to set the desired RPM and the governor used centrifugal weights and springs to open or close the throttle plate in the carb-when the engine was under load (say sawing a big log) the governor opened the throttle to keep the RPM at say, 2,000. Then when the log was finished (no load on engine) the governor automatically throttled back to keep the RPM the same.

06-28-2015, 05:35 PM	#3
Gold Digger Senior Member Join Date: Nov 2011 Location: Arkansas & Alaska Posts: 650	Re: Hoof governor I have one of those but don't know if it's a Hoof brand. Mine came off of a welder and also had a mechanical governor that worked in conjunction with the vacuum governor. The one I have is said to be off of a B engine.

06-28-2015, 07:31 PM	#4
Rowdy BANNED Join Date: May 2010 Location: Gothenburg Nebraska Just off I-80 Posts: 4,893	Re: Hoof governor I have never seen a Hoof for the A before. Seen a couple of other brands that bolt to the timing cover. I think I still have a couple of the Kingstons in the parts pile. Rod __________________ Do the RIGHT thing - Support the H.A.M.B. Alliance!!!!

06-28-2015, 08:12 PM	#5
Steve Wastler Senior Member Join Date: May 2010 Posts: 1,987	Re: Hoof governor As Bob C says, Hoof governors were furnished and installed by the Post Office Garage's and used on both the A and AA. Will be marked on the side by model number 29-31 A or 29-31 AA. Yours appears to be a little newer application, but I'm viewing on my phone.

06-28-2015, 09:03 PM	#6
Keith True Senior Member Join Date: May 2010 Location: Epping N.H. Posts: 3,021	Re: Hoof governor Sponsored Links (Register now to hide all advertisements) Where it says model,mine is marked,Ford A.Under that,where it says serial number,it is marked 1929-31.

06-28-2015, 11:03 PM	#7
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,363	Re: Hoof governor So all mail trucks were equipped with this (or another) governor?

06-28-2015, 11:33 PM	#8
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,791	Re: Hoof governor I believe these units were merely speed (RPM) limiters, not true governors. Engine speed was directly controlled by the foot pedal or hand lever up to whatever RPM the Hoof unit was set at (say3,000 RPM) as determined by the amount of air flow through the unit. At that point, air flow working against a spring would begin to pull closed the throttle plate in the unit to prevent the driver from overspeeding the engine. A true governor, mounted on the timing cover or belt driven, maintained a certain desired RPM whether the engine was under full load or no load, or anything in between. The throttle plate in the carb was connected to the governor, not the foot or hand lever. The hand lever was connected to the governor to set the desired RPM and the governor used centrifugal weights and springs to open or close the throttle plate in the carb-when the engine was under load (say sawing a big log) the governor opened the throttle to keep the RPM at say, 2,000. Then when the log was finished (no load on engine) the governor automatically throttled back to keep the RPM the same.