Rear Lift Arms

icom102 · Post by **icom102** » Sun Jun 19, 2011 11:14 pm

How high should these lift up? when mines up i can rase them another bit by had but they never go up that far other wise is this normal ?
also after first starting the tractor and i lift the arms nothing happens for a good few mins then all of a sudden they rise up its not a problem any more only happens after the tractor is layed up for a wile

Dandy Dave · Post by **Dandy Dave** » Mon Jun 20, 2011 11:14 am

Sounds like the screen in the bottom needs to be cleaned. On every tractor I have worked on, there is always some free play on the top range of the 3 point hitch. It is there by design. Dandy Dave!

icom102 · Post by **icom102** » Mon Jun 20, 2011 5:52 pm

By screen do u mean the filter?

Dandy Dave · Post by **Dandy Dave** » Tue Jun 21, 2011 1:15 pm

Yeah, the one underneath. Dandy Dave!

icom102 · Post by **icom102** » Tue Jun 21, 2011 6:08 pm

yea that has been cleaned

dennis · Post by **dennis** » Tue Jun 21, 2011 10:13 pm

Hi, Icom 102

Just measured from ground to centre of lift arm pin when raised by power. It measured 4' 03/8".

I have 36" wheels fitted. Tractor is a '55 FNM.

Also, my manual says arms should move 39 degrees above and below the horizontal.

Hope this helps.

dennis

icom102 · Post by **icom102** » Tue Jun 21, 2011 10:30 pm

cheers i must measure it

Kiwi Kev · Post by **Kiwi Kev** » Wed Jun 22, 2011 12:19 am

dennis wrote:Hi, Icom 102
Just measured from ground to centre of lift arm pin when raised by power. It measured 4' 03/8".

You can also measure from the base of the hydraulic cover to that pin, and it should be 5.58 inches. This way, it doesen't matter what size wheels you have.
Kiwi Kev

dennis · Post by **dennis** » Wed Jun 22, 2011 10:07 am

Hi Icom102,

Further to my last post.

After the lift arm had been powered up to its upper limit, it was not possible to move it any further by hand.

At any position other than fully raised it is of course possible to move it further up because the "dog bone" only rests against the piston and is not mechanically tied to it.

This was a surprise because it must mean that when the arms are fully raised the short radius rod, that turns the cross shaft, was hard up against the back of the gearbox casting, which doesn't seem like good practice to me.

dennis
.

henk · Post by **henk** » Wed Jun 22, 2011 8:10 pm

Dennis,

Remove the cover on the back and you will see what is happening.

Icom,
You should put a gauge on the system to see what the pressure is doing. Than you can see if any changes in the system made by you make a difference.

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