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Thread: 300tdi vac pump- this is it's insides.

  1. #21
    Join Date
    Jan 1970
    Location
    Perth
    Posts
    137
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    Thumbs up Vacuum pump

    Diesel engine design doesn't allow a vacuum pipe to be run to a brake booster (to help you press the brake pedal more easily) from the inlet manifold as has been the practice for many years on petrol engines. Diesels need a separate pump somewhere; driven off a belt like an aircon compressor; on the back of the alternator; or on the side of the engine, pushed up and down by a cam on this particular model Defender.

    Another thing to note is that some synthetic engine oils can cause these pumps on the 300Tdi to sieze up. I know from bitter experience!

  2. #22
    Join Date
    Jan 1970
    Location
    Adelaide Hills - SA
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    12,486
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    Well... using Ace's instructions my mechanic pulled the leaking pump apart, made a new gasket, tapped some threads into the housing, put it all back together again, and I now have a non-oil-leaking land rover for the first time in ages. He said it was an easy fix.

    Much better than getting a new unit at the price quoted by Land Rover. Hope it lasts.

  3. #23
    Join Date
    Jan 1970
    Location
    Launceston, TAS
    Posts
    853
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    Just a quick question regarding "spongy brakes" mine has done that occasionally lately but not all the time. I was thinking flush brake fluid and bleed but am now wondering if perhaps the Vac pump needs checking first.

    Excuse the ignorance but I didn't think about the Vac pump as I thought if it was faulty it would cause a hard pedal. (Lack of vacum assistance to brake booster)

    Can someone set me straight!

  4. #24
    Join Date
    Jan 1970
    Location
    Adelaide - Torrens Park
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    7,291
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    Quote Originally Posted by cookiesa View Post
    Just a quick question regarding "spongy brakes" mine has done that occasionally lately but not all the time. I was thinking flush brake fluid and bleed but am now wondering if perhaps the Vac pump needs checking first.

    Excuse the ignorance but I didn't think about the Vac pump as I thought if it was faulty it would cause a hard pedal. (Lack of vacum assistance to brake booster)

    Can someone set me straight!
    I would be thinking along the same lines. Lack of vacuum = hard pedal.

    Have you checked your wheel bearings. Loose bearings will allow the discs to knock the pads back - soft pedal on first application.

  5. #25
    Join Date
    Jan 1970
    Location
    Launceston, TAS
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    853
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    No, I will tonight, thanks. Seems more likely to do it on rough tracks than around town

  6. #26
    mr brown Guest

    to easy

    wow. I am no mechanic and actually havn't worked much on engines but after reading your repairs to recapping the vaccum pump and replacing the rivets i feel like i saved myself about 500 big ones. Very easy to do and only took me about 3 hours to complete...not a drop comes out of her now. Cheers mate..

  7. #27
    Join Date
    Jan 1970
    Location
    Launceston, TAS
    Posts
    853
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    Sorry, had some drama's with our Feroza (Head Gasket) so haven't had a chance to look any further in to this yet!

  8. #28
    Join Date
    Dec 2013
    Posts
    38
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    I re did mine the other week end only I jist drilled out the riverts and put new bolts one by one in. Its good to see someone else has taken it apart I was scared it was going to be a pain in the ass to put back together but either way mine doesnt leak now either

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