Doris the Dexta renovation

  1. postie jon Member

    Messages:
    763
    Location:
    Aberdeenshire, Scotland
    No sure would need to look, he is the type of man who could fix anything ,well maybe not computers etc, but if it was broken and couldnt get a part for it he would be out with the grinder and stick welder and make one ,he was in the gubbins of the clock only 2 mnth ago,and bought himself a cushman 1600XD atv with cab but no door keys, ,barrels were good ,so he did what he does,and made one that worked perfect from some stainless from the drum of an old washing machine. i visited him last night and he was manipulating his left hand with his right desperatly trying to get it working again. DAD :welder:
     
  2. postie jon Member

    Messages:
    763
    Location:
    Aberdeenshire, Scotland
    spoke to dad tonight , apparently the oil pressure was 70 psi, the mechanic had rigged up a dial gauge onto an old oil pressure switch, dad says the manual says 10 -14 psi is normal. the new shells couldnt have been to tight as when they started her she fired up first wind, the mystery goes on , lol :laughing:
     
  3. johnser

    johnser Member

    Messages:
    1,719
    Location:
    North Cornwall
    The job of stopping overpressure of the oil is done by a relief valve. Why is it letting oil pressure reach 70psi?
     
  4. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    Check out this link. It may explain the high oil pressure
     
  5. postie jon Member

    Messages:
    763
    Location:
    Aberdeenshire, Scotland
    cheers thats probably what it is , thanx.:waving:
     
    Ian James likes this.
  6. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    I'm sort of back on the Dexta, between kitchen cabinet making, the engine is going back together starting tomorrow so had to accelerate the painting of the exhaust manifold with high temperature paint.

    Fresh out of the oven, 160c for 45mins until tender and the paint is cured. The old manifold had been brazed at some point and looked a bit delicate, but the new one had lots of casting marks and ugly makers marks which needed a bit of a grind.

    20190531_235149_2124.jpg
     
  7. Bill Edwards Member

    Messages:
    4,785
    Location:
    Scarborough, North Yorkshire
    Have you used the high temperature paint on exhaust manifolds before?
    I'm curious as to how well it lasts.
     
  8. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    I've only ever used HT paint on stoves, but this stuff claims to be VHT paint. I gave it 4 thin coats as per instructions and did plenty of prep to get the red oxide primer off and degreased well with acetone. Ideally I would have sand blasted it but my big compressor is not fixed yet, should be by this Friday.

    Once I have the big compressor going again I'm going to get a blast pot as the stock suction solution on the blast cabinet is a bit slow. I have lots of tractor bits to blast.
     
    brightspark likes this.
  9. brightspark

    brightspark Member

    Messages:
    25,935
    Location:
    yarm
    could have borrowed my pot if you were local still can if you are. it runs about 90cfm with a 6mm jet
     
  10. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    Thanks!

    90cfm!

    Blimey, my "big" compressor is only about 22cfm
     
  11. brightspark

    brightspark Member

    Messages:
    25,935
    Location:
    yarm
    ive got the smaller pot with a 3mm jet and that will work very well with a 22cfm comp if wanted to try
     
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  12. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    Thanks you very much for the offer, Yarm isn't too far from my brother's place, so If I'm heading that way before I need one I shall drop by :)

    We only had a couple of hours today to do the engine, my mate the mechanic has a medical condition, one of those where you have to suppress the immune system with steroids, he can only handle a couple of hours at the moment before he's knackered. He went away with a couple of bottles of home brew and his kids and mine made all sorts of stuff with hammers and bits of wood.

    I thought I had the right reamer for the little end bushes. Close, but no cigar, so will take them over to another friend who specialises in old motors, he's bound to have the right reamer and tooling for his press rather than a combination of old sockets :)

    Cheers
    Andy
     
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  13. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    We got a bit further today, but we couldn't get quite as far as we wanted due to somebody else's mistake a few years ago. It was all going well, two pistons in, then it seemed the oil control ring was missing from the third pack of piston rings. Then we noticed they were a bit bigger too.

    I can't remember how long ago it was probably about 5 years, but I bought a complete Sparex super Dexta engine rebuild kit. Looks like the part picker put a single set of David Brown rings in by mistake.

    I'll give them a ring on Monday, it's only 8 quid plus vat for a new pack.

    Next update in 2 weeks, gives me time to spray the sump, oil and fuel filter, timing chest etc. Most are in epoxy primer, just need a rub down, decrease and top coat.

    I'll takes some pics next time.

    Cheers
    Andy
     
  14. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    I just called Dunlop tractor spares in Ballymena where I bought the Dexta overhaul kit from in 2012, 7 years ago:whistle:. They are dropping me a set of rings in the post FOC, that's service for you!

    Regards
    Andy
     
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  15. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    Here's a couple of pics, I'll take more next time.

    Two pistons in, just waiting for rings

    P1080257.jpg

    Next job, top coat on the ancillaries, timing cover etc. I've already blasted and given most a coat of epoxy primer, just needs the dust blowing off, a light sand and degrease.

    P1080258.jpg

    Cheers
    Andy
     
    Woody.v8, indy4x, mylesdw and 5 others like this.
  16. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    I started painting last night, just finished for the day, dog walk time :)

    Here's some of the haul, other bits are hanging off of various handles, vices, door knobs etc.

    P1080291.jpg

    I sprayed it all outside, here's the sump and a few bits of bracketry. The 3M paint preparation system is a life saver, the liners and cups saves so much time in cleanup and saves paint too. I mixed a full cup yesterday, finished spraying, took the cup off and put the cap on, used another cup for gunwash, 2 mins later all clean. Next day, take the cap off the paint cup, plug it back in and off we go.

    P1080292.jpg


    I shall give them a second coat possibly tomorrow evening. Engine rebuild continues next Sunday.

    Cheers
    Andy
     
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  17. brewdexta

    brewdexta Member

    Messages:
    3,615
    Yorkshire
    I spotted this yesterday so didn't spray the pipes.

    P1080295.jpg

    And a close up

    P1080296.jpg

    So I looked back at the pictures I took before dismantling in 2009 :whistle:

    And it appears it was the throttle cable, something to look out for when routing the new pipe. You can see it crossing the fuel pipe on the right of the pic. It must have been peeing diesel, but it drove off the trailer ok. It had tractor Ebola, it was leaking bodily fluids from every orifice, so it was probably lost amongst all the other leaks :)

    P1000689.jpg

    Cheers
    Andy
     
    Seadog likes this.
  18. slim_boy_fat

    slim_boy_fat Forum Supporter

    The equivalent of a verrrrrry slow hacksaw.;)
     
    brewdexta likes this.
  19. Kayos

    Kayos Member

    Messages:
    4,369
    Location:
    Yorkshire
    Tractor Ebola? I think my D2 has caught a dose of that
     
    brewdexta likes this.
  20. Robotstar5

    Robotstar5 Casanunda Staff Member

    Messages:
    17,557
    Location:
    Birmingham
    It will, it's a Land Rover, suffers the same as British bikes :laughing:
     
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