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Thread: P38A Aircon Compressor Clutch

  1. #11
    p38arover's Avatar
    p38arover is offline Major part of the heart and soul of AULRO.com
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    When I was in Seattle, I looked under the bonnet of rrtoadhall's P38A, then turned to him and said, "Your clutch is falling off".

    The nut was that loose, it wouldn't have been long before it was gone.
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



    RIP Bucko - Riding on Forever

  2. #12
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    Quote Originally Posted by p38arover View Post
    As most early P38A owners will know, the air con clutch would occasionally not engage and eventually it slips and wears to the point where it rarely engages.

    An early fix was to remove a shim behind the clutch but this only deferred the problem.

    LR came up with a mod. kit, the aircon Compressor Link Harness, to increase the applied voltage to the compressor clutch:



    I removed the shim in mine about 7 years ago, and fitted the link harness about 3-4 years ago, and this cured the problem - I thought.

    However, yesterday the compressor clutch failed to engage once more. The clutch had worn even more and the air gap was too great.

    Following a suggestion from Scouse, I pulled the clutch off today, put it in the lathe, and machined off 25 thou from the back of the clutch spigot. That reduced the air gap back to within spec (0.35-0.65mm) and all is well once more.

    When I pulled the clutch off, I found it had been wearing unevenly so I'll keep an eye out for another one (secondhand from a failed compressor).

    Note the wear at the lower left:




    The bit I machined down:


    Hi Ron, old post dragged up but do you remember how to get the clutch off the front.
    Rob Hayden
    Lilydale, Victoria

    1995 4.0 SE P38
    2003 L322 Vogue
    1992 4.0 Supercharged Active Suspension Soarer
    1988 Ferrari Testarossa
    1955 Buick Riviera Coupe
    1972 DeTomaso Pantera
    -----------------------------------------------

  3. #13
    p38arover's Avatar
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    Hi Rob,

    If I recall correctly, I used a strap wrench to hold the clutch from rotating while I undid the nut.
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



    RIP Bucko - Riding on Forever

  4. #14
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    Last time I had to undo a clutch centre nut I just engaged the clutch.

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