Question for The Old Hokie

[MF135 diesel]

Some time ago you showed pictures of an offset front mounted hydraulic pump driven off the crankshaft pulley that did not require cutting a hole in the front grill of an N tractor. How is that project progressing? It appeared to be very neat setup. Thanks for any information.

 

[TheOldHokie]

(quoted from post at 10:04:50 12/17/13) Some time ago you showed pictures of an offset front mounted hydraulic pump driven off the crankshaft pulley that did not require cutting a hole in the front grill of an N tractor. How is that project progressing? It appeared to be very neat setup. Thanks for any information.

Good memory! It has not progressed beyond the initial prototype which is still sitting on the work bench. Too many projects and too little time ;-) Another gentleman was interested and contacted me a year or more ago about one. He went the extra mile and built his own using a few improvements I felt were needed after my first go round. Just recently received an update from him and he reports it is still happily chugging along.

TOH

 

[Dollar Bill]

Great idea! Much easier to hide the lines beneath the tractor and won't clutter up the engine bay of a side mount distributor motor. Was wondering what happened to this project myself.....

Since the pump sits lower than the crankshaft, how do you drive the pump?

 

[TheOldHokie]

(quoted from post at 12:30:27 12/17/13) Great idea! Much easier to hide the lines beneath the tractor and won't clutter up the engine bay of a side mount distributor motor. Was wondering what happened to this project myself.....

Since the pump sits lower than the crankshaft, how do you drive the pump?

The pinion shaft shown in the picture is aligned with the crankshaft. The pump sits slightly lower in order to fit beneath the bottom tank on the radiator and is gear driven off the pinion. Total centerline offset is roughly one inch and teh gearbox bolts to the front using the 1/2" threaded hole in the axle support used to retain the axle pin. There is just enough fore/aft clearance to squeeze a 3 GPM pump in behind the grille with absolutely no room to spare ;-)

TOH

 

[Bob]

NOT sure if I've posted these here before? It appears the pump mount replaces the front axle pivot pin.

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR1_zps30fb7b56.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR2_zpsd1e2a92f.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR3_zps19aa9576.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR4_zpsd364d8df.jpg">

 

[Bob]

NOT sure if I've posted these here before? It appears the pump mount replaces the front axle pivot pin.

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR1_zps30fb7b56.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR2_zpsd1e2a92f.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR3_zps19aa9576.jpg">

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/N%20Ford/CHAR4_zpsd364d8df.jpg">

 

[TheOldHokie]

(quoted from post at 12:47:59 12/17/13) NOT sure if I've posted these here before? It appears the pump mount replaces the front axle pivot pin.

Never seen that before but some minds seem to work alike. I do something very similar with this one which is currently "in production". That scheme works extremely well - the only issue is neither one will fit behind the grille. To do that you have to get under the radiator and even then it's tight.

TOH

 

[POPGUN]

Nothing new under the sun its a combination of what has been seen here, there, and everywhere. Legally you only need to change something 10% to obtain a patent. Hope it has a way to compensate for torque,pressure variations, and centrifugal variation. Maybe thats why it on the bench or lack of fund$ to get it to market like the copy of Howard reduction also on the bench. I must say I do like the engineered reduction gears.

 

[TheOldHokie]

(quoted from post at 23:17:18 12/17/13) Nothing new under the sun its a combination of what has been seen here, there, and everywhere. Legally you only need to change something 10% to obtain a patent. Hope it has a way to compensate for torque,pressure variations, and centrifugal variation. Maybe thats why it on the bench or lack of fund$ to get it to market like the copy of Howard reduction also on the bench. I must say I do like the engineered reduction gears.

The things on the bench are there for lack of time. My market is what goes out the door of my shop :roll:

Not sure what torque/centrifugal "compensation" you are looking for. It is a simple offset shaft gearbox. The engineering challenge is finding sufficient mounting clearance for it.

TOH

PS&gt; Standing in the shower I realized what your torque question was all about :idea: The quick and dirty prototype did not have a torque arm on it although I considered it at some length. The 1/2-20 mounting screw provided more than enough clamping force to offset the shaft torque during the prototype testing. One of the "improvements" I discussed with the gentleman that rolled his own was an outboard permanently lubed radial ball bearing for the drive shaft. He mounted his in the back side of the gear box housing and added a second mounting bolt as a torque arm. I had plans for mounting the bearing inside the axle pin where it would provide better shaft alignment and act as the torque arm. Even went so far as to get some additional parts made which were later repurposed for the larger pump mount.