hydraulic lines mc

boto1 · Post by **boto1** » Tue May 17, 2011 9:32 pm

lavoy: this tractor has the original pump on front of motor no lines no tank and no controls, the loader has everything on it pump runs off front of motor with shaft. i know you said good advice not to put loader back on but given the options should i get the lines and hyd tank (on ebay for $300) and controls and then blade. (loosing my mind farming season started too!!!)

Post by **Lavoy** » Tue May 17, 2011 10:30 pm

If the hyd pump is crankshaft driven, that came with the loader. If it is camshaft driven, then that is the original pump. I would definitely get the rest of the hyd system and get it installed. Once you have that done, you are ready as soon as you find a blade.
Lavoy

boto1 · Post by **boto1** » Wed May 18, 2011 9:37 pm

well i guess i need to see which pump has better pressure, I am not one for to many headaches. realy want a dozer,but not looking good for that maybe come across one that has dozer set up and leave this one as loader and make modifications. picture you have has a rear weight dont have a clue where to get it but i can build one knowing the mounting place. or if i had some measurements I can fab a blade, i have picture of blade but no measurments.

Willyr · Post by **Willyr** » Thu May 19, 2011 10:16 am

The pump on the camshaft (according to John Deere) is only 900 psi. Granted on my dozer the lowest I could go was 1500# on the valve body.

Post by **Lavoy** » Thu May 19, 2011 10:24 am

Overpressure on the cam pumps will tend to break the center section of the pump at the outboard alignment dowel, so be careful, that is an expensive part to find.
Lavoy

boto1 · Post by **boto1** » Thu May 19, 2011 8:53 pm

well i guess i need to run all my ideas through you all because you defenetly smarter on these crawlers lol. so the pump on loader should be used and watch what i lift with it to not overload pump but it should have a bypass to keep from damaging pump right?

Post by **Lavoy** » Fri May 20, 2011 7:53 am

All hyd systems have a bypass somewhere, whether in the valve itself, or in line somewhere.
The main problem with a loader on an MC is breaking undercarriage parts, predominately front idler brackets.
If you are going to put the crawler back to original hyd valve and such, then you will want the cam pump.
Lavoy

boto1 · Post by **boto1** » Sat May 21, 2011 5:55 am

So thats why these are cracked then. toooo late!!! and i didnt do it lol. any other pices i should inspect while i got it off. sounds like i got my hands full with this project.

Post by **Lavoy** » Sat May 21, 2011 7:52 am

If it has been a loader crawler, I would look at all of the rollers, usually the most forward rollers will be very badly worn or broken. The front idlers on an MC are undersize, so all of the load is basically held up by the two forward rollers, and eventually they break.
Check the angle irons on the track frames where the front idler brackets slide, sometimes they will start to break the welds and pull away from the trackframes. Check the trackframe for alignment and straightness to make sure they are not twisted. Take the front idlers apart and make sure the bushings in the idler are not cracked or broken as well as the cone of the idler bracket that the bushing rides on.
Lavoy

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