55 series hyd charge pumps

dep · Feb 12, 2020

Is it possible to convert an early 55 series that had the belt
driven hydraulic circulator pump to the later style that had that
pump located behind the pump?

Cash4Toys · Feb 13, 2020

If you are talking a about the cooling pump, belt driven, yes it can be done. I have not done this myself, but i know of someone that has. The cooling pump is then driven off the same drive as the main pump, internal. Dont quote me on this, but i think you need to change the housing that supports the pump, as well as the drive. Dont think its cheap to do, but it sure makes for a cleaner look.

Young Mechanic · Feb 13, 2020

I'm not sure how the pluming would work if at all, but I've thought about just tying in to the low pressure circuit and using some sort of restricting valve to reduce pressure going to the cooler. What you would have to figure out is how to maintain enough flow to the cooler but still have enough pressure for the low pressure circuit, ( pto, brakes, etc.)

Cash4Toys · Feb 14, 2020

(reply to post at 19:55:58 02/13/20)

If you look at the parts for the pump drive, it's in the transmission section, you will see there is quite a bit that needs to be changed.
The gerotor pump behind the hydraulic pump was added some where in the 247xxx serial numbers I believe. Also, at 236164 on 1955's, the rear main housing was changed, to include 1/2" hyd. pump mounting bolts, not sure on the 17 & 18's serial number. Unless you have the transmission apart or opened for some other reason, you are looking at a lot of money and work to add the new style pump.
if you have a service manual, go to the Massey Ferguson site, sales and support, technical publications and get a service manual. 17,18,19 and 2255 are all in one manual. You can buy it online, and download it for very little coin, but worth every penny

wilma · Feb 14, 2020

Yes but it's not an easy swap. The drive gear in the transmission is a different tooth count and cut at a different angle, so to do this update you need to pull the top cover/ hydraulic unit and change the gear in the transmission first, then the rest is "outside changes". I've done them in every early 55 series tractor that needed an input shaft put in...if you look in the parts book under transmission it'll show the serial number break and the tooth count, etc

55 series hyd charge pumps

dep

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Cash4Toys

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Young Mechanic

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Cash4Toys

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wilma

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