1490/hydraulics

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farmer350
Posts: 3
Joined: Sat Oct 15, 2016 8:49 pm
Location: Berkshire

1490/hydraulics

Post by farmer350 » Sat Oct 15, 2016 9:13 pm

Hello,
New to this hope ok. I have just bought a 1490 hydrashift always wanted one as used to drive one when I was 16 on Yts 29 yrs ago! Unfortunately I can't remember some things on the tractor, may be as mine is slightly different with flat top hydraulics the one I used to drive had quadrant. Couple of things I need help with, I'm using it on position control for a sprayer/topper can I just check I have it in position control via knob at back of quadrant and using main lever for up and down, where does the lever that comes out from the base of the seat on the left need to be I have it fully forward there are other positions can't remember what they are for. Lifts up ok no problem but judders really badly on the way down shakes the whole cab! Tried altering the rate of drop speed but seems to do nothing to improve it. Have I got something wrong I have just resealed the dump valve as arms where dropping when lifted and then pumping up again seems to have cured that problem, does need abit of a rev to lift I'm wondering about the pump.
Have bought an operators manual but only shows quad type think I should have bought a 1494 book as mine is a very late model.

Any help would be greatly appreciated
Thanks
Graham

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case-ih1594
Posts: 1065
Joined: Sun May 12, 2013 10:38 am
Location: Preston

RE: 1490/hydraulics

Post by case-ih1594 » Sun Oct 16, 2016 7:50 am

Hi, this link may help:

http://www.dbtc.co.uk/index.php?name=PN ... ic&p=26316

I think DB made a special instruction book for tractors fitted with the flat deck console. I don't think many tractors were made with that arrangement.

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farmer350
Posts: 3
Joined: Sat Oct 15, 2016 8:49 pm
Location: Berkshire

RE: 1490/hydraulics

Post by farmer350 » Sun Oct 16, 2016 11:33 am

Hi, thanks for posting link I will look into wether there is a different book.

Does anybody have any ideas why it judders so badly when link arms are going down.

Ta

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ollek
Posts: 3799
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

RE: 1490/hydraulics

Post by ollek » Sun Oct 16, 2016 11:40 am

You must not try to slow down the lowering speed by moving the control lever slowly when lowering when you use height (position) control. Adjust the lowering speed to slowest possible speed to suit the implement used and push the lever forward to the position wanted in one fast move.

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farmer350
Posts: 3
Joined: Sat Oct 15, 2016 8:49 pm
Location: Berkshire

RE: 1490/hydraulics

Post by farmer350 » Sun Oct 16, 2016 2:28 pm

ok, thank you. just got to do some topping so will try that

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