Volvo RWD 444-544 Forum

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444 clutch linkage 444-544

Hi all:
While doing some detailing on my engine compartment ('58 444 L - B16) in preparation for installing the new eng/trans I decided to have a look at the mechanical clutch linkage. Good thing I did! The pivot point on the frame was oblonged to the point of near breakage and the two rods and bellcrank had serious grooves worn in them. There seems to be no provision for lasting lubrication at most of these pivot points, save the one on the bellhousing.
I did a search to see if anyone had a fix but could find nothing. I am thinking maybe something like a heim joint or some sort of bushing? Anyone have a fix/thoughts? should I just weld and remachine them?

TIA & Cheers!
OK








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    444 clutch linkage 444-544

    I just got off the road from another test ride and this linkage issue is fresh in my mind. I have extensively upgraded my clutch linkage, replacing all of the wear points with hyme joints and remaking all the linkage. I toyed with the idea of running a hydraulic setup and decided that the mechanical setup was simple and bulletproof so why change it. I'm beginning to regret this I think. I find the mechanical setup is clunky and inefficient. The clutch is grabby, and there is a weird pivot point halfway through the swing of the pedal. The car jerks when the clutch is engaged and is lurchy upon takeoff. The whole thing, with the lurching on takeoff, the grabby clutch and the pivot point all feel pretty crappy. I'm wondering if the hydraulic setup would have been a better way to go.









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      444 clutch linkage 444-544

      The feel to the clutch pedal movement might improve if you increase the length of the pedal rod that you can see (in the pic), and then shorten the inner one that you can't.
      It looks as if you've shortened the first arm on the linkage and this will make the clutch action much quicker. This often leads to stalling when getting away from a junction which puts you at risk from that truck behind you. You get used to it but usually at the expense of having to give it a bootfull of revs to be sure you get away cleanly. Fine for quick changes on the move. Mechanically it looks nicely executed but some small adjustments to arcs and angles might improve things.








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    444 clutch linkage 444-544

    youll never guess what we used to do in the old days. When a customer would come in with the no more adjustment left on the threaded rod,we would heat up the crossshaft and bend it tighter.Talk about cheap.But in those days a complete lingage replacement was out of the question. Go for new parts and let them wear out.Just part of the original design.








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    444 clutch linkage 444-544


    Thanks for the replies! I think the 444 is a bit diferent than the 544, at least the B18 versions. I am now thinking that heim joints in a couple of places (green arrows in the graphic) and an oilite bronze bushing with zerk (red arrow) would solve the problem, or at least greatly reduce the onset of any 'slop' in the system. The three places indicated look to be the main problem areas, at least on my car. I have a bit of time before I can put the new engine/trans in (waiting on driveshaft and other parts) so I may see if I can tweak this to improve its service life.



    Cheers!
    OK








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      444 clutch linkage 444-544

      Like others who have replied, I've built those joints up with welding and then filing smooth. Works fine. I've also used brazing to build up the rods, and although brazing is softer than welded-on steel, it seems to stand up pretty well if given an occasional dollop of grease. Slipping short piece of replaceable copper refrigeration tubing over the rod ends may also be a way of dealing with the wear, although I've never tried that.

      Bob S.
      --
      "62 PV544 (B20, M41), "71 142E, "93 240 Classic Wagon.








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    444 clutch linkage 444-544

    Hey I found it , go to the photo gallery choose 544 444 photos and choose the third picture set (red car) . Hope this helps Larry








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    444 clutch linkage 444-544

    Hello,

    The lack of lubrication is an issue, but back then Volvo just expected you to change linkage pieces when needed and they assumed they were going to make them forever.

    I have converted to heim joints, but this was a lot of work and was actually done to operate a clutch master that was mounted in place of the brake master as we put an 1800e dual circuit brake master with booster attached to the frame under the drivers seat.

    I have in stock a reproduction bracket that welds to the frame that accepts the stock clutch linkage bushing if you want to keep it stock.

    Most of the rest of the linkage is still available new including all 3 of the pieces that push on the clutch throw out fork and of course I have most of them in stock.

    When ever I am out of stock or if the piece is not available, I have been able to fill grooves in metal linkage pieces with weld and then grind back to near the correct shape.
    --
    Eric
    Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
    Torrance, CA 90501








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    444 clutch linkage 444-544

    Heim joints work nicely. Sorry I don't know html stuff, but I think this'll copy and paste:

    http://www.flickr.com/photos/volvorelix/2106172890/in/set-72157603442476319/

    Best,

    Cameron
    122SC,444
    Rose City








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      444 clutch linkage 444-544

      Hello Cameron: I've sent you a separate e-mail on another matter.

      Regarding the 444 linkage, I guess I was lucky that my previous Swedish owners kept these joints from wearing. Careful attention to the rubber grommet on the 544 and grease would prevent the inevitable from happening. Most "American" PVs seem to have been badly neglected through lack of regular maintenance. I think the number of front end grease fittings on a 444, including the clutch was in the neighbourhood of 23! One 544 I worked on even had the clutch adjustment mechanism lengthened to avoid changing the clutch. Eventually the pivot bolt holding the clutch fork fractured inside the flywheel housing.

      We're still freezing cold up here in Canada (-10C) and still way too much snow to take our vintage Volvos out of winter storage. Happy Easter everyone.

      --
      Cam a.k.a. CVOLVO.COM








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    444 clutch linkage 444-544

    Hey dave , there is something in the archives on this fix as you mentioned with heim joints . I will see if i can find it . I saved a picture of it . Larry








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      444 clutch linkage 444-544

      I think the linkage on the 444 and the 544 may be the same. My 544 clutch linkage had 3 connections that were worn very bad. I added weld where they were worn and then filed the hole out to the proper diameter, and did the same on the outside of the connecting rod from the clutch arm down to the linkage. Olof has the hard rubber (or maybe its soft plastic) bushings (2) for the cross piece. These bushings are difficult to install, but greased good and installed with a vice or C clamp they will go into place. Of course new parts would be better, but if they aren't available yours CAN be repaired.







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