|
Yes, it's been far too long since Brady asked a DIY motor mechanics question.
The other day, exactly once day after replacing rear tyre and cracked rim on my GY6 type scooter, from an errant curb brick, my CVT drive belt broke. Now guys tell me it's quite easy to change the belt, but I should really also change the bearing rollers. Apparently I need an airgun for this, supposedly to removed the front pulley. I can do a hell of a lot with a socket or a tube spanner. What is the story?
|
|
|
|
|
I've never tried to remove a pulley on one of those, but there are problems with sockets and long arms and so on.
I assume that the front pulley is the one near the starter motor in this picture: http://3.bp.blogspot.com/_kv3F0ZMQ2gk/TDbSDH4it2I/AAAAAAAAAB4/UFzv50VVI9c/s1600/DSC_0572.JPG[^] - if so, then the spanner approach may have problems, because if the belt is broken it is going to be quite difficult to stop the pulley moving while you apply leverage because you can't use the back wheel to do so.
A airgun may well be more successful because they tend to be impact driver type devices which apply a succession of small clouts to the nut rather than one long hard one. (oo-err missus)
Me? I'd take it to the shop, and see if I could watch how they did it...
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
|
|
|
|
|
I can't get it to the bloody shop. They did tell me I would need an air-gun, but I see in the very un-Heynes workshop manual, they use a tool with a U t the end of a handle, and each end of the U has a pin that fits in a hole either side of the from pully, enabling you to hold it while loosening the main nut.
|
|
|
|
|
And have you got the tool? (He said, hoping the answer would be yes) And a big strong mate or two - one to hold the tool, and one to hold the rest of the engine? (He said, again hoping the answer would be yes)
You really don't want to c*ck this up - if the picture is anything to go by, then that pulley is mounted right on the end of the crankshaft, so excessive force in the wrong direction could bend the crank or damage the main bearings (though those are probably roller or ball in a two stroke, not plain and thus harder to damage with lateral pressure) Above all else, resist the urge to hit anything with a big hammer!
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
|
|
|
|
|
If I have the tool I would have finished the job some time ago. This is sort of what it looks like[^], but this is a much smaller version.
|
|
|
|
|
Maybe it's time to make a small investment.
This book[^] supposedly covers the GY6 engine.
People say nothing is impossible, but I do nothing every day.
|
|
|
|
|
Nooooo! Not the Haynes Book Of Lies! He has been good, I'm sure of it, he doesn't need punishment!
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
|
|
|
|
|
It has to be better than the one I have.
|
|
|
|
|
That's the one I found.
People say nothing is impossible, but I do nothing every day.
|
|
|
|
|
When I were younger and Haynes were the only manuals we could afford (it was buy the manual or buy the parts in those days, and boy, did we need the parts...) we used to swear at the damn things. Normally for what they left out: "Reassembly is the reverse of disassembly" eh? Oh yeah, I'll just make all those ball bearings you didn't mention just back up behind the cover you told me to "remove" without mentioning the "bearing cannon spring" behind it, shall I? Or they would "leave out" one bolt of fourteen - the one on the other side, under the sump for example...
I think I've posted this here before:
How to read a Haynes manual...
Haynes: Rotate anticlockwise.
Translation: Clamp with mole grips then beat repeatedly with hammer anticlockwise.
Haynes: This is a snug fit.
Translation: Clamp with mole grips then beat repeatedly with a hammer.
Haynes: This is a tight fit.
Translation: Clamp with mole grips then beat repeatedly with a hammer.
Haynes: As described in Chapter 7...
Translation: That'll teach you not to read through before you start. Now you are looking at scary photos of the inside of a gearbox.
Haynes: Pry...
Translation: Hammer a screwdriver into...
Haynes: Undo...
Translation: Go buy a tin of WD40 (giant economy size).
Haynes: Retain tiny spring...
Translation: PINGGGG - "Where the hell did that go?"
Haynes: Press and rotate to remove bulb...
Translation: OK - that's the glass bit off, now fetch some good pliers to dig out the bayonet part (and maybe a plaster or two).
Haynes: Lightly...
Translation: Start off lightly and build up till the veins on your forehead are throbbing then clamp with mole grips then beat repeatedly with hammer.
Haynes: Weekly checks...
Translation: If it isn't broken don't fix it.
Haynes: Routine maintenance...
Translation: If it isn't broken, it's about to be. We warned you...
Haynes: One spanner rating.
Translation: An infant could do this... so how did you manage to **** it up?
Haynes: Two spanner rating.
Translation: Now you may think that you can do this because two is a low, teensy weensy number... but you also thought the wiring diagram was a map of the Tokyo underground (in fact that would have been more use to you).
Haynes: Three spanner rating.
Translation: Make sure you won't need your car for a couple of days.
Haynes: Four spanner rating.
Translation: You're not seriously considering this are you?
Haynes: Five spanner rating.
Translation: OK - but don't ever carry your loved ones in it again.
Haynes: If not, you can fabricate your own special tool like this...
Translation: Hahahahahahahahahahahahahahahahahahahahahahaha.
Haynes: Compress...
Translation: Squeeze with all your might, jump up and down on it, throw it at the garage wall, then find some molegrips and a hammer...
Haynes: Inspect...
Translation: Squint at really hard and pretend you know what you are looking at, then declare in a loud knowing voice to your wife "Yep, as I thought, it's going to need a new one"
Haynes: Carefully...
Translation: You are about to suffer deep abrasions.
Haynes: Retaining nut...
Translation: Yes, that's it, that big spherical blob of rust.
Haynes: Get an assistant...
Translation: Prepare to humiliate yourself in front of someone you know.
Haynes: Turning the engine will be easier with the spark plugs removed.
Translation: However, starting the engine afterwards will be much harder. Once that sinking pit of your stomach feeling has subsided, you can start to feel deeply ashamed as you gingerly refit the spark plugs.
Haynes: Reassembly is the reverse of disassembly.
Translation: Yeah, right. Ever reassembled your dinner?
Haynes: Prise away plastic locating pegs...
Translation: Snap off...
Haynes: Using a suitable drift...
Translation: Clamp with mole grips then beat repeatedly with hammer.
Haynes: Remove...
Translation: And don't forget the bolt underneath that we didn't mention...
Haynes: Remove carefully...
Translation: Did we mention the 200 ball bearings and that big spring?
Haynes: Apply moderate heat...
Translation: Unless you have a blast furnace, don't bother. Alternatively, clamp with mole grips then beat repeatedly with hammer.
Haynes: Index
Translation: List of all the things in the book, bar what you need to do.
Now the young can know why we referred to them as "The Haynes Book Of Lies".
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
|
|
|
|
|
Yes you have posted it before, it's still as fun.
People say nothing is impossible, but I do nothing every day.
|
|
|
|
|
In a much poorer youth I had to exchange the gearbox of my fathers Citroën GS, using a Haynes manual.
To say that the instructions were incomplete is quite an understatement.
You couldn't remove it downwards as the wheel suspension subframe was in the way. So I had to remove the engine.
The engine couldn't be lifted upward, because there was a strengthening beam going between the wheel arches.
So I had to remove the front of the car in cluding headlamps and everything, so that I could lift the engine forward. We didn't have an engine lift.
Try to imagine in how many ways the manual was incomplete when the job had this many steps, as described in chapter 11.
This whole job took me two weeks. But I learned a lot during the experience.
A couple of years later I had a Ford Granada. It was a bit simpler mechanically.
And I had to exchange the clutch on it.
That took me two and a half hours including lunch. Still using a Haynes manual.
Experience helps a lot. Not having a Citroën helps more.
People say nothing is impossible, but I do nothing every day.
|
|
|
|
|
I feel your pain! My first car was a Lancia 2000 HPE and no two were alike, so you had to remove a component and take it with you when you went for a spare part.
That thing was serious fun to drive, but as PITA to work on - you couldn't remove the fourth spark plug without dismantling the cooling system as one of the rigid pipes was routed over the top so you couldn't get a plug spanner on...
Edited: gesture typing on Nexus tablet works only if you keep an eye on it...
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
|
|
|
|
|
I think so too. I enjoy working on my vehicles, and OK, I also enjoy paying people to work on them, but occasional DIY mechanics is immensely satisfying.
|
|
|
|
|
Alas I don't have time or equipment nowadays.
But a successful DIY repair can really do my day, or week if it's tough and or expensive
People say nothing is impossible, but I do nothing every day.
|
|
|
|
|