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jumbo
10-30-2017, 07:47 PM
:noidea:

As I am lying under my 212 grader, adjusting/fabricating a power steering pump, it came to me:

Has anyone ever pulled the pony engine changed it out to direct electric start and then used the pinion gear access to the flywheel and fabricated a connection point for a gear driven hydraulic pump? In my mind, it sounds feasible and reasonable, but before I start down a rabbit hole, I figured I would ask the question and hopefully people can punch holes in it before I get too far along thinking about it.

STEPHEN
10-30-2017, 08:03 PM
:noidea:

As I am lying under my 212 grader, adjusting/fabricating a power steering pump, it came to me:

Has anyone ever pulled the pony engine changed it out to direct electric start and then used the pinion gear access to the flywheel and fabricated a connection point for a gear driven hydraulic pump? In my mind, it sounds feasible and reasonable, but before I start down a rabbit hole, I figured I would ask the question and hopefully people can punch holes in it before I get too far along thinking about it.
It would make a terrible racket, need to stay greased & turn the pump like the devil.

ccjersey
10-30-2017, 08:22 PM
What he said!

You are going about it the right way, the power shaft under the cab turns at engine rpm and can be easily ratioed up or down with pulley selection to run a hydraulic pump for the steering or on later models (12E for example) it direct drives a hydraulic control unit that mounts on the front of the cab so you can run a hydraulic side shift moldboard.

captainhowdy
10-30-2017, 08:32 PM
on my old 9K we took the power shaft off from under the cab and fabed one up with a pulley in the middle. then mounted a small hydraulic pump under the floor and plumbed it into a charlyn unit in the steering shaft above the frame in front of the operator. it worked great and made steering a one finger affair.

old-iron-habit
10-30-2017, 10:50 PM
The Behlin power steering unit I installed on my 212 has a belt pulley for the pump built into the front u-joint on the live shaft.

jumbo
11-02-2017, 08:47 AM
Thanks for the insight. I will stick to my v-belt pulley on the power shaft under the cab. It is nice to have bad ideas shot down before I spend time and money on them..

oldbeek
11-02-2017, 10:47 PM
Have a complete Belehn unit on a 9k cat 12 I am parting out. Have no idea in what shape. everything else is completely worn out on the machine

oldbeek
11-05-2017, 07:45 PM
Anyone know how similar a 212 is to a 9k 12 where this pully and pump are mounted? I know very little about the 212.will my Belem pump and steering unit off my 12 fit his 212?

ccjersey
11-05-2017, 08:39 PM
The 212 i had had a pulley that bolted to the universal joint yoke on the input shaft of the power control box. So the pump and reservoir or filter, (can't remember exactly which was on the pump itself) was under the floor of the cab. The only thing that might be different is the bolt pattern in the pulley.

jumbo
11-10-2017, 04:09 PM
I have all the parts, and am now just troubleshooting why I don't have enough flow or pressure to drive the unit. My original question was driven more by the fact that it is easier for me to work standing alongside the grader than sitting under it. My tag line says it all.....:smile:

oldbeek
11-11-2017, 12:13 AM
I have all the parts, and am now just troubleshooting why I don't have enough flow or pressure to drive the unit. My original question was driven more by the fact that it is easier for me to work standing alongside the grader than sitting under it. My tag line says it all.....:smile:

The one I had, (sold it today) had a 4 inch drive pully and a 5 or 6 inch driven pully.

old-iron-habit
11-11-2017, 04:31 PM
I had to fabricobble a new pump and mount for my Behlin unit under the cab on my 212. If you ever need to replace the pump the Behlin steering unit is only rated at 1,000 PSI. The lowest pressured pump I could find was 1,200 PSI. We set the bypass relief to 1,000 PSI. I had to add a relief line from the pump back to the hydraulic reservoir as the original Behlin pump did not have a relief. I can take pictures if anyone needs some of the whole installation.