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Lubricating Bezzera E61 Cam.

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  • #16
    Originally posted by Dimal View Post
    Absolutely Jon.... 8-)

    And given that these components are also quite inexpensive, its almost a non-issue....

    Cheers mate....




    Mal.
    When I got my Bez the lever was slick but after by first Caffeto backflush its tighter and squeaks...doesnt feel right. 20 shots later and margin improvement. Looks my machine might be in the lube required category... Cheers

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    • #17
      Originally posted by ozscott View Post
      When I got my Bez the lever was slick but after by first Caffeto backflush its tighter and squeaks...doesnt feel right. 20 shots later and margin improvement. Looks my machine might be in the lube required category... Cheers
      Morning Ozscott, Yep, Cafetto does strip the lube away, you should be able to lube the cam by removing the mushroom, spring and pin, then using something long and thin (I use a satay stick) put a dab of food grade grease on the cam, much easier than removing the handle/cam assy.
      Click image for larger version

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      Last edited by Yelta; 16 April 2019, 09:52 AM. Reason: Added .jpg

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      • #18
        Trouble is, this only lubes half the cam, the portion that engages with the upper valve.
        Not hard to remove the cam ass'y, lube and replace...

        Another option, is to have the cam "hard chrome faced" and this issue will never be a problem again.

        Mal.

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        • #19
          Thanks gents. Any tips for first time strip down. I am assuming screw comes off the side of the lever allowing handle removal which in turn allows a socket (with cloth or tape...yikes) over the main fitting on the side of the group and once that is off the cam is accessible? Cheers

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          • #20
            G'day mate...

            There are some good videos around re: How-To, like this one for example. There is a thread here too, that covers it with plenty of detail...

            Mal.

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            • #21
              Ok she's smooth as silk again. Used Inox food grade lube. I love how heavily built the group is and how easy it is to strip and rebuild. Love it.

              Cheers

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              • #22
                Excellent Oz'...

                Yep, love the Old School design and quality of these groups too. Can't beat 'em.

                Mal.

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                • #23
                  Morin Ozscott, good job well done.

                  I've contemplated Mals hard chrome option for the cam, however, one of those jobs I've never found time to do, means machine down time, trip or send to Adelaide, all too hard, perhaps if/when I need to replace the cam.

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                  • #24
                    Originally posted by Yelta View Post
                    Morin Ozscott, good job well done.

                    I've contemplated Mals hard chrome option for the cam, however, one of those jobs I've never found time to do, means machine down time, trip or send to Adelaide, all too hard, perhaps if/when I need to replace the cam.
                    I just bought a new one and sent it off to have the cam chromed (they're pretty cheap). Replaced the original the next time I serviced the Group...

                    Mal.

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                    • #25
                      Hi Mal. Would you mind letting me know where you got yours hard faced? I am somewhat underwhelmed by the fact that despite a liberal greasing and no chemical backflush the handle of my Bez is getting stiff and a little squeaky again... not happy Jan!

                      Should I just let it grind away and reach a happy medium...? Because from memory each valve gets replaced eventually when the seals go... I can live with the squeaks and stiffness as long as I'm not doing damage that isn't easily repairable.

                      Cheers

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                      • #26
                        Be wary of hard chroming the cam. The cam surface will last forever but will cause premature wear on the upper and lower valve pins and before you know it you'll be wondering why the exhaust and brew valves are misbehaving.

                        Edit: one issue that rarely gets mentioned re cam wear is the orientation of the valve pins that contact the cam. Grinding and a dry feeling thru the lever can be caused by the pins being on an angle with the corners digging into the cam rather than being square on. Easily checked and rectified by removing the actuator/lever assembly and if necessary turning the valves straight on with needle nose pliers.
                        Last edited by JMcCee; 22 April 2019, 08:15 PM.

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                        • #27
                          Thanks mate. Much appreciated. This pic shows the bottom valve pin alignment before I pulled the cam out. Does that look right?

                          Cheers

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                          • #28
                            Originally posted by JMcCee View Post
                            Be wary of hard chroming the cam. The cam surface will last forever but will cause premature wear on the upper and lower valve pins and before you know it you'll be wondering why the exhaust and brew valves are misbehaving.
                            This is NOT true...
                            If the chrome plating is completed correctly, the contact interface between the two materials produces such little friction that all that eventually occurs, is that the brass valve stems become highly polished over time with the result that the valve ass's last more than four times as long. Also, no sign of metal 'drag' (galling) on the valve stems either...

                            Mal.
                            Last edited by Dimal; 23 April 2019, 03:04 PM.

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                            • #29
                              It's a bit hard to tell on that angle. Maybe pull the assembly and have a squiz. If you've done it once you should be able to do it with your eyes closed =)

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                              • #30
                                Originally posted by ozscott View Post
                                Hi Mal. Would you mind letting me know where you got yours hard faced? I am somewhat underwhelmed by the fact that despite a liberal greasing and no chemical backflush the handle of my Bez is getting stiff and a little squeaky again... not happy Jan!
                                I arranged it through a machine-shop owner here in Warwick who uses a business in Brisbane.
                                I did a quick look-up on businesses in Brissy and noticed that there are quite a few to pick from, so I guess the easiest thing to do would be to contact a number of them and find which operations are setup to handle small items...

                                It's only the cam periphery that needs to be hard faced, not the entire component.

                                Mal.

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