a friend of mine has to replace the bearings and the mandrel is on his a
lawn mower deck and these things go out fairly frequently so what we're going to
do before he puts these new ones on is drill and tap a hole here and put a
grease fitting in there and then he's going to when it gets home take the
bearings are sealed and on each side of the bearing that faces downward or
inward he's going to remove the seal so when you fill this full of grease it
will go up into the bearings so I'm going to show you how we drill and tap
this there's three of them okay this won't fit in my vise so I'm going to
have to hold this
aluminum for Becky probably some kind of little banal
Wow Christophe
didn't take much to drill yeah much my good alright now we're going to tap it
alright we've got the tap started I just wanted to be sure that the hole was
going to be big enough and the size of the hole I drilled was a 13 64th and I'm
using a quarter-inch tap
and the reason you wiggle it back and forth like this is to give the chips a
chance to clear out of the threads you're cutting and ball down in a hole
there we go yeah at work
all right here's the brief spin
see what you see that is please five sixteenths yep might even be a metric
that we're smelling oil smells like coconut right there
that's just about seated now this is a real cheap metal I'm talking about the
grease fittings so you want to really ease them in there gently you want to
rock it back and forth to make sure the threads are not going to strip out there
we go that's as tight as you get all right I've got two more than to do and
this will make your repairing metals your bearings and your manuals last the
life of lawn mower I've done this on all nine Lords you buy a cheap one more and
do this to it this is the week length of your mower deck this and some of the
they call bearings on the pulleys but they're not really bearing if they're
just sleeves that are designed to fail very very soon and you can go to Oh some
of the auto parts stores some of the old hardware stores still have them pulleys
with really good bearings in oven and replace the cheap ones and you could
have a mower for far longer than the people that made it intended for you to
have it so there we go I've got two more of these and we're done
I just wanted to I'm not sure if I mentioned this earlier but if you were
to do this to your bearing manuals and pull the seals off the inner side of the
bearings this is a commitment that you I mean it's a commitment you have to keep
these packed full of grease once you pull them seals off the only way to keep
the grease up in the bearings is to keep this pumped up full of grease and I
would say every 10 hours or so I use just hit with a grease gun they'll be in
a real convenient spot just be able to reach up on there of a few strokes
agrees in there but if you decide to do this it is a commitment that you got to
do often but in exchange you never have to do it again you never have to replace
these are the bearings so that's it thanks for watching