1390 noisy power steering

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msw
Posts: 34
Joined: Sun Aug 22, 2010 7:11 pm
Location: north devon uk

1390 noisy power steering

Post by msw » Thu Aug 26, 2010 9:14 pm

dear all @ david brown tractor club
i am really struggling with this power steering problem.It whines and makes a sort of vibrating noise,the tone of which changes,with engine rev`s.Perhaps someone else has experienced the same problem.I have changed the filter and oil, but no improvement.The tractor was making these noises when i bought it,but i thought i knew what the problem was,i obviously did`nt! Any suggestions or comments would be greatly appreciated
Many thanks
mark

david1690
Posts: 129
Joined: Mon Feb 08, 2010 6:20 pm
Location: Wales

RE: 1390 noisy power steering

Post by david1690 » Thu Aug 26, 2010 9:23 pm

I think it may be Air in the system.
However if the steering is slow, I would say the pump is worn.

User avatar
msw
Posts: 34
Joined: Sun Aug 22, 2010 7:11 pm
Location: north devon uk

RE: 1390 noisy power steering

Post by msw » Thu Aug 26, 2010 9:46 pm

Thanks for replying david,but unfortunately i have done that, but it did`nt stop it.I don`t think the pump is worn because steering is very responsive,and tractor has only done 3000 hours.I am just wondering whether there is an air lock somewhere else in the system which is hard to remove.What do you think?
many thanks
mark

david1690
Posts: 129
Joined: Mon Feb 08, 2010 6:20 pm
Location: Wales

RE: 1390 noisy power steering

Post by david1690 » Thu Aug 26, 2010 11:16 pm

Is the noise from under the dash/cab area?

Oz
Posts: 111
Joined: Sat Oct 28, 2006 10:51 am
Location: crowborough, east sussex

RE: 1390 noisy power steering

Post by Oz » Fri Aug 27, 2010 9:28 am

I have the same problem on my 1390 with the noise coming from under the dash area. Any suggestions as to how I can make it go away would be very well received, it does not strike me as normal because a friend's 1290 does not do it.

It is worse on fuller lock or at higher revs. Also worse the faster the steering is turned. The steering is very responsive and powerful.

User avatar
msw
Posts: 34
Joined: Sun Aug 22, 2010 7:11 pm
Location: north devon uk

RE: 1390 noisy power steering

Post by msw » Fri Aug 27, 2010 8:23 pm

dear david,thank you so much for taking an interest, and trying to help me.It is very much appreiciated.Yes, the noise does seem to be coming from under the dash.If i hold the upper p\s pipe inside the cab just above foot throttle, and my son moves the wheel at about 1200-1500 revs i can feel the pipe vibrating.
My problem sounds exactly the same as Oz's, so maby its a common fault on a 1390,because i`ve no problem with my 1490.Any more suggestions would be very helpful
many thanks
mark

mitch
Posts: 969
Joined: Fri Apr 21, 2006 10:29 am
Location: Toowoomba Australia

RE: 1390 noisy power steering

Post by mitch » Fri Aug 27, 2010 10:23 pm

Is the steering valve knackered (orbitrol valve?). If steering works and steering fluid is not burnt or depleted all the time I wouldn't worry about it.
non-Q 1975 1210 2wd
model# 1210/1 728931
engine# AD4/55A 26193

1975 1412 2wd
model# 1412/1 1050623
engine# 455011 120673

david1690
Posts: 129
Joined: Mon Feb 08, 2010 6:20 pm
Location: Wales

RE: 1390 noisy power steering

Post by david1690 » Fri Aug 27, 2010 11:19 pm

Mitch has said it really.If you have tried all other things then the unit has a fault in it.

I was told once that if there is any wear on some part of the unit (I dont remember which part!)It is not repairable.
But the seal kits are around £50 and you could probably manage it yourself. I used to have a manual for these but cant find it now.
Much easier and cheaper to replace the whole unit with a second hand one I feel.

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mburns
Posts: 958
Joined: Sun Apr 13, 2008 8:42 pm
Location: devon

Post by mburns » Fri Aug 27, 2010 11:22 pm

There is usualy a second hand orbital unit for sale on ebay from guy hall in yorkshire .

martin

Alchad
Posts: 716
Joined: Tue Aug 14, 2007 8:18 pm
Location: Shropshire

Post by Alchad » Sat Aug 28, 2010 6:23 pm

I've played about with most of the power steering bits with varying degrees of success and swapped orbitrols AND power steering pumps tp get rid of a similar noise - all to no avail. In the end it more or less disappeared on its own. Maybe it's the ghost of some disgruntled David Brown employee that wanders from 1390 to 1390 to upset their owners!

Seriously, I recall a conversation with someone - I think it might even have been one of the experts at Barclay Williams - who reckoned that they moved the location of the orbitrol from inside the cab/dash area to outside because of the noise issue. Don't know how true this is Mark, if you've also got a 1490, might be worth having a look to see if they are in the same place.

Also, I think I also found that the noise was rev dependant, which maybe implies it's some sort of harmonic resonance effect set up in the connecting pipes. Don't really know what you can do about that except try and keep out of the particular rev range.

Alchad

Scooby
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Joined: Tue Jan 03, 2006 8:16 pm
Location: Warwickshire

Post by Scooby » Sat Aug 28, 2010 9:43 pm

Alchad wrote: Don't really know what you can do about that except try and keep out of the particular rev range.

Alchad
Ear muffs ? 8) 8) 8)
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Three is twee, four does snore, but 6 just clicks........Scooby

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