valve block on rear end of super major

[hazzard]

Hi
My super major is leaking oil from the left hand port of the valve block. I have pictures but am unable to put them on the site.
It's the smaller of the 2 ports, I am guessing that there is maybe a ball in there secured by a roll pin.
Can anyone put me right on this please and suggest a remedy?
Thanks in advance.

[hazzard]

Should have said, it's on the valve block on top of the rear end

[Billy26F5]

For the pics see this:
viewtopic.php?f=1&t=5024
As for the leak it'll be easier to see with the pics.
Sandy

[hazzard]

Sorry Sandy, I cannot even get Photobucket to accept me as a paying member !
Why can I not just copy and paste onto the site, as with other sites?
David

[hazzard]

The leak, not gushing, is from the rear of the valve block, the smaller of the two ports if that helps.
I wonder, if you would'nt mind giving me an email address I can send pics that way ?

[Billy26F5]

You can try using http://postimage.org, you don't even need an account for it.
Sandy

[hazzard]

Thanks Sandy, it will have to be tomorrow, computer failure !

[Billy26F5]

You will want o-ring 87008-S95, If you haven't removed it already I suggest you remove the block from the top cover to ease access and the removal of the roll pin.
Sandy

[hazzard]

You have pm.

[Billy26F5]

It's actually a plug with the o-ring on it, I think I remember a manual suggesting using a ball to push it out but I'm not 100% sure about that. Once you've got it out everything should be straightforward.
Sandy

[Billy26F5]

Here's the "manual", its actually an extract from Dexta Service Sheet 2 1963, the block is the same on the Dexta and the Super Major.


Sandy

[hazzard]

Hi Sandy, Thanks for the diagrams. I have taken the bull by the horns and got the plugs out, not by the method described but by my own method !

Plug D already had a small hole in it so I put a wood screw in and it came out easily.

Plug C, I had to drill a 2mm in it and it came out easily. Then I had to close the hole! Only way was to weld over the hole from both sides, grind/file the weld level, find 2 O rings and re-assemble. When the new gasket arrives tomorrow I will re-assemble and let you know the result.
The other similar-looking ports I have left alone, 'if it ain't broke don't fix it' !!

Many thanks for your assistance.

[Billy26F5]

When you test the hydraulics make sure you count the corrections per minute with an implement raised, there should be a maximum of 3 a minute in theory, but more can be acceptable short term provided you don't reach 1 a second; any more can impair stability dangerously.
Sandy

[hazzard]

Well the gasket never arrived so this morning made one. Put some instant gasket where necessary, put the valve block on, bolts in and hey presto, all works well....on tick-over anyway !
Thanks for all your advice and help. Got a few diesel leaks to attend to now....
David

[Billy26F5]

Make sure you start with the leaks before the lift pump as they're the more troublesome ones.
Sandy

[hazzard]

Thanks for advice Sandy, I've managed to fix the leak in the glass bowl filter so all is well.
Next the offside disc brake needs dismantling, I think there may be an oil leak from the back end into the housing as the brake is non-functioning. Hope it's not a 'major' job !

[Billy26F5]

Try adjusting it first, you might find it's very loose.
Sandy

[hazzard]

Will do Sandy but there is a slight oil leak from the outside casing of the brake so off it must come !! I guess there is an oil seal in there somewhere that needs renewing.

[Billy26F5]

There is indeed, part no. E1ADDN-2773
Sandy

[hazzard]

thanks.

[mathias1]

Off side is the RH side?
There's also a little o-ring on the differential shaft. It's worth replacing this one also.