H delay lift trouble

Dave Salway · Dec 13, 2015

Had my H set up with front mount planter/side dresser and rear
mount delay lift cults. for a fair. Every thing worked fine but
yesterday went to lower rear lift and it will not release. The
planter works fine it is just the rear that will not release.
Any thoughts ?

D Slater · Dec 13, 2015

If the delay lift valve is okay you will probably have to drop the hydraulic unit and open it up. Left rear port check ball isn't getting pushed off the seat for some reason if that's where the rear cylinder is attached. Would remove the delay lift valve and hook up without it and try first or take the valve apart and check for a return blockage in it. Also may want to make sure nothing is binding the implement or in the cylinder and keeping it from retracting.

Andy Martin · Dec 13, 2015

You might have some air in it. Did you work it several times at high engine speed? Might try bleeding the connections before you take it apart.

john *.?-!.* cub owner · Dec 13, 2015

It has been a long time since I had any dealings with one, but assuming you have a standard belly pump, the delayed port does not have a separate valve (at least ours did not), the delay was accomplished by having a restricted port, so the rear did not get full pressure till the front came full travel. You might check for a binding pivot on the rear cultivator or a hose that is deteriorating and the inner part swelled. Any chance it could have a one way check valve rather than a flow restrictor?

D Slater · Dec 13, 2015

This is a M picture but the H is the same operation. Provided everything is free and no blockage from cylinder to liftall one of the two pins push to releases fluid back to the reservoir from the left rear port. Other pin releases the other ports. Make sure lever on side of center housing is moving forward completely.
Simple to check for external problem. Put a bucket under the left rear outlet and loosen hose enough to drip. If it starts dropping the problems internal. No drop it's external. If the front drops the operating linkage is moving enough to push the first pin in.

Janicholson · Dec 13, 2015

If the lift was made rather hard against the full up position, the rod might not be fully forward. (pushed in) Jim

jim warehime · Dec 13, 2015

Would like to see some pics. I have always liked the old mounted implements. Jim.

Dave Salway · Dec 14, 2015

Believe I found the problem . This is the original outfit my Dad
started with in 1949 and things wear . Cults went down when I steped
on to get on tractor . Every time I raised yesterday after a bit I could
step on and they went down. There is what I will call a assist sping on
left side and it has broken. At first thought it helped raise but it
appears to help lower and there is a (dont know tech. name) relief
valve on hydralic cylinder and will tear it apart over winter and
clean . Probally will need to make the spring from a new one .

H delay lift trouble

Dave Salway

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D Slater

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Andy Martin

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john .?-!. cub owner

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D Slater

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Janicholson

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jim warehime

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Dave Salway

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