Does the puller shown on the right in this Screwfix product look like
it's suitable to remove the flywheel on an old Suffolk Punch 35S
Depends on whether it will get behind. The three legged type is another
*Some* flywheels use an extractor tool which screws into the (threaded)
counterbore which the nut sits in. A bolt in this threaded sleeve then
bears down on the crankshaft.
Hmm, don't think so.
If it looks like this
then I would hazard a guess that once you've removed the recoil starter and
pawl sub-assembly you might be able to screw bolts back into the two holes
in the flywheel on either side of the central left hand thread nut (once
you've removed it of course) through a short bar across the end of the
crankshaft. This should "push" the flywheel off the crankshaft.
You could even re-use the pawl hub sub-assembly (part 123) with something
to block the central hole packed behind it.
Ah yes, I was almost going to say that sometimes flywheels have threaded
holes for simple extractor bolts, but I thought that was going to be too
(Currently searching for my bit of scaffold pole to slip over the big
stilson in an attempt to loosen a gate hinge adjustment nut. I know I
shouldn't be using the stilson, but the big adjustable hasn't come back
When I was doing my Agricultural Engineers apprenticeship one of the
first tools I made up was a dual purpose lawnmower flywheel puller.
A simple bit of steel plate with a "puller" hole in the centre into
which a bolt and nut was loosely fitted (the pulling/pushing bolt)
then a set of 3 holes for 3 hole flywheels and 2 holes for the likes of
the flywheel pictured above.
If I remember sometimes you'd need to actually tap a thread into the
flywheel holes if it hadn't been removed previously (obviously the same
thread as the bolts on your tool) (M6 possibly)
Then screw the puller bolts into the flywheel and wind the centre bolt
out gently, not forgetting to gently tap around the edge of the flywheel
to free it off as too much puller-pressure can strip out the threads
you've just tapped into the flywheel.
One thing NOT to do is try and lever the flywheel off as the fan vanes
will crack off the back with very little pressure.
Trouble is, I don't have any short bar or equivalent. So I thought by
the time I've gone to the hassle of locating a short, thick bar, or a
longer strip of 10mm stock I can saw down, I might as well look for a
suitable puller instead. There are numerous "universal" pullers for
this type of small engine on eBay and on Amazon. some with several
holes for the twin screws, others with elongated holes to adjust to
the appropriate pitch. Some don't have a threaded centre screw to push
against the crankshaft, but I think are intended to use two nuts on
each of the two bolts. You screw the bolts into the holes in the
flywheel, arranging the nuts either side of the bar. Then you unscrew
all four nuts and this has the effect of pushing the flywheel off --
with a judicious tap on the end of the crankshaft to break the taper.
I did read on one of the mower websites that a 2p piece is exactly the
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