Subject: RE: Timimg chain must come off to remove tensioner?
Author: jason telford
Date: Dec 23, 2002, 8:38 AM
Post ID: 1711618486
Hi Bill,
I've done this in the past...way past...on a tonti bike....and don't
have any books in front of me. Nevertheless, I'll try to obfuscate the
situation.
Put one of the cylinders at TDC. Then mark with a pencil a line
straight up or down on each of the gears and the chain- this is for
reference later when you put them back together. If you're looking at
the gears, remove the three nuts holding the three gears on. One of
them (the crank) has a tang- or star--washer. Bend the tang back. To
remove the weird nut on the crank, you need a special 4-prong driver, or
a flat-end chisel and hammer. I don't recall if they are all regular
thread, but the only one that might not be is the cam, and you can see
those threads.
Well, once the nuts are off (some bleeding may be involved, depending on
how you operate a hammer), ease the three gears+chain off as a unit.
Just a few mm at a time. A gear puller may be necessary, but be gentle
and slow.
Take the gears/chain off the shafts as a unit, lay to the side (don't
loose the woodruff key on the oil pump!). Then it's a matter of
removing the old tensioner, and replacing with the new. Apply whatever
studlock/teflon/antisieze is your favorite. I'd probably use locktite
myself. Put the gears/chain back on as a unit, make sure your
alignment marks are the same as before. Tap the gears back on slowly
and evenly with a rubber mallet, put the washers/nuts back on. Apply
seals, timing covers, and a beer. Admire your handiwork, and take a
drive.
I have to say I'm pretty dissapointed in your email, since I also have a
'74 in my garage. Yes, it has a chain. No I haven't looked at it.
Damn.
Happy holidays, ya'll.
Cheers,
Jason
Bill Cohoon wrote:
| I've got all the books I can get my hands on.. but, for some reason was thinking I could replace the tensioner without removing the chain/sprockets. That ain't so I guess after viewing the situation? I'm new at this, so, to all you old-timers, please be kind. The good news is that I did check the old tensioner and it is a gooey, disentigrating mess. I've got the new tensioner ( a valtek), seal and gasket.. would any of you with a kind heart, and the Christmas spirit, walk me through it....as to where I go from here?.. the timing cover is off and I'm looking at the gears... it's a '74 Eldo, by the way.. For you novices out there, take it from me.. check out your tensioner.. you'd be amazed what a mess I found... thanks, Bill |