reassembly drive tube
Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo
reassembly drive tube
I have been looking in manual and on forum, but can't find the proper way to reassemble the drive tube; how far do you force it in, and how, hammering? I have a 102
Hi Harry - I assume you are talking aobut getting the water pump casting back onto the drive tube?
With a 102, its best to put the water pump casting on withe the drive tube bolted to the rest of the motor, and with the exhaust tube and water pipe also in place, as you have to make the connection onto the water tube, which of course comes out under the exhaust, and where the exhaust tube will help you line up the pump casting on the drive tube.
That all said, clean the casting where the tube will enter fro its whole length, as there is often corrosion build-up in this bore. Use aCotchbrite pad or fine mery cloth if necessary, to get back to reasonably clean metal.
Clean the end of the drive tube.
Wipe some grease or similar onto both parts - I like Coppergrease for these situations.
The parts should now go together with some gentle help from a heavy hammer or rubber mallet - if you use a steel hammer, hold a piece of wood between it and the aluminium casting.
If the fit seems too tight, which it shouldn't at this point, heat the casting, which will expand it a little.
The end of the drive tube should end up flush with the bore in the casting.
While you are doing all this, make sure the exhaust part of the casting is aligning with the exhaust tube, and ensure the water feed pipe is in the correct place. Rick
With a 102, its best to put the water pump casting on withe the drive tube bolted to the rest of the motor, and with the exhaust tube and water pipe also in place, as you have to make the connection onto the water tube, which of course comes out under the exhaust, and where the exhaust tube will help you line up the pump casting on the drive tube.
That all said, clean the casting where the tube will enter fro its whole length, as there is often corrosion build-up in this bore. Use aCotchbrite pad or fine mery cloth if necessary, to get back to reasonably clean metal.
Clean the end of the drive tube.
Wipe some grease or similar onto both parts - I like Coppergrease for these situations.
The parts should now go together with some gentle help from a heavy hammer or rubber mallet - if you use a steel hammer, hold a piece of wood between it and the aluminium casting.
If the fit seems too tight, which it shouldn't at this point, heat the casting, which will expand it a little.
The end of the drive tube should end up flush with the bore in the casting.
While you are doing all this, make sure the exhaust part of the casting is aligning with the exhaust tube, and ensure the water feed pipe is in the correct place. Rick
- Charles uk
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If it is still reluctant after doing all Rick suggests.
Replace the 5/16 pinch bolt but from the wrong side ( from the threaded side first not the unthreaded side as it should be) when the pinch bolt starts to protrude from the thread in the water pump housing insert a 20p coin into the central slot thighten the pinch bolt by hand until it holds the coin in place, the coin must not obscure the ingress of the drive shaft tube in any way.
Now tighten the pinch bolt against the coin very carefully this should open the pinch area sufficiently to allow the drive shaft tube to slide into place.
Too much pressure on the pinch bolt will snap off, one of the lugs!
SO BE VERY CAREFULL!
Then remove the pinch bolt & the f***ed coin & put the bolt back the right way & tighten only enough to retain the water pump housing.
Too much enthusiasm with the 5/16" spanner will wreck 1 of the pinch bolt lugs, so gently does it!
Replace the 5/16 pinch bolt but from the wrong side ( from the threaded side first not the unthreaded side as it should be) when the pinch bolt starts to protrude from the thread in the water pump housing insert a 20p coin into the central slot thighten the pinch bolt by hand until it holds the coin in place, the coin must not obscure the ingress of the drive shaft tube in any way.
Now tighten the pinch bolt against the coin very carefully this should open the pinch area sufficiently to allow the drive shaft tube to slide into place.
Too much pressure on the pinch bolt will snap off, one of the lugs!
SO BE VERY CAREFULL!
Then remove the pinch bolt & the f***ed coin & put the bolt back the right way & tighten only enough to retain the water pump housing.
Too much enthusiasm with the 5/16" spanner will wreck 1 of the pinch bolt lugs, so gently does it!
Hi Harry - best to separate the gearcase from the waterpump casting so that you can see where the end of the tube comes to, so you have less weight to worry about, and it will be easier to clean the bore.
The two castings are only held together with two bolts, and you will need to remove the clutch rod if your motor has one. Rick.
A 20 cent coin will be fine - just go easy as Charles says!!
The two castings are only held together with two bolts, and you will need to remove the clutch rod if your motor has one. Rick.
A 20 cent coin will be fine - just go easy as Charles says!!