Loader question

[Tunames]

I have an 1812 and a 2072 one of them is going to end up with a loader. They both have auxiliary outlets. My question is can I use the existing hydraulics or do I need to add a aux pump?

Thanks

[J-Mech]

Well, there is only one outlet on the front. So, you will not be able to run both the loader and the bucket..... and the spool valve on the machine doesn't have a detent position to "lock it in", so running a second valve is out of the question. Unless you want to hold two levers at once. The pump that supplies oil to the front outlets is a VERY small pump, and only makes about 600PSI. I'm going to say that unless you want a slow loader, or both hands busy all the time, your probably going to need an auxiliary pump.

[rweaver]

the thing I see as a problem is the oil in the rear will get all before the loader is up I think another pump and tank is needed

[Tunames]

J-mech I was thinking of replumbing the existing lines to make use of the factory controls on the dash. It would end up a dedicate loader. Still might do that, but with a bigger pump! Also thinking of making foot controls for forward and reverse to free up a hand. I don't understand what you mean by "lock it in"

[CADplans]

The one shown on page 12 and 13 of this catalog operates off the charge pump of the 149.

http://www.cadplans.com/cadplans-catalog.pdf

Simply connect the valve you want for the loader in series with the existing valve.

If you are going to have a dedicated loader, re-plumbing the existing will work.

The loader needs careful design, to insure you do not use too large of cylinders.

Larger cylinders make the loader response slow, they need more oil to fill them per stroke.

[J-Mech]

Originally Posted by Tunames

J-mech I was thinking of replumbing the existing lines to make use of the factory controls on the dash. It would end up a dedicate loader. Still might do that, but with a bigger pump! Also thinking of making foot controls for forward and reverse to free up a hand. I don't understand what you mean by "lock it in"

I don't see any reason why you can't do that. What I meant by "lock it in" is that the factory spool valves do not have a locking detent. You have to hold them in place. So, using them to run a second valve would require you either hold the dash lever while using the second valve, or lock the dash lever on in some way. CAD has said several times that the charge pump on these tractors is adequate to run a loader. (See post above.) I believe him, as I have not ever seen or tried it. I do, however, think that a larger pump would be beneficial. If I were putting a loader on a Cub Cadet, I would use a seperate pump.

[Tunames]

I was thinking i'd just use the factory valves. Why would I need to run another valve from the factory valve? Anyone ever make foot controls?...

[Humphrey]

You most likely don't have the appropriate valve from the factory to run a loader.


Im not sure if the factory valve is closed center or open center. All that determines is what you need for valving and for a pressure relief valve.
What you can do is thread a t into the pressure line from the charge pump and a t on to the return line for the charge pump. From those two T fittings you can plumb into a second valve to run the loader. The charge pump will have more then enough balls to run the loader it just may not move enough flow so as to give you any real speed.

[CADplans]

Originally Posted by Humphrey

You most likely don't have the appropriate valve from the factory to run a loader.


Im not sure if the factory valve is closed center or open center. All that determines is what you need for valving and for a pressure relief valve.
What you can do is thread a t into the pressure line from the charge pump and a t on to the return line for the charge pump. From those two T fittings you can plumb into a second valve to run the loader. The charge pump will have more then enough balls to run the loader it just may not move enough flow so as to give you any real speed.

That may work for closed center.

Cub Cadets are open center, no 'tees" on the pressure line allowed.

Either use the existing 2 section valve, or "series" in another valve.

[J-Mech]

Originally Posted by CADplans

That may work for closed center.

Cub Cadets are open center, no 'tees" on the pressure line allowed.

Either use the existing 2 section valve, or "series" in another valve.

I agree! That is correct.