Triumph 750 engine tear down question. - Page 4

concours · 12-04-2012, 06:10 PM

Quote:

Originally Posted by bagpiper22

I'll let you know what I find. I had to leave it half-opened for now. I did what I could to remove the pinion gear, but didn't want to force it, so the proper tool is on the way. Should arrive this week.

I moved too fast and didn't mark my shifter before pulling the inner cover, so now I'll learn all about indexing. fun fun!

I hope to get at the trap this weekend. Will post results.

Thanks!

Scott

You know you have to heat the case to get the bearing out, right?

marksbonneville · 12-04-2012, 06:32 PM

Quote:

Originally Posted by concours

You know you have to heat the case to get the bearing out, right?

I stuck mine in the oven and the crank just fell out

bagpiper22 · 12-04-2012, 08:18 PM

I was going to go that route, but then figured with a puller on the way, I'd just wait. If I end up baking it, do you recommend a certain temp? For how long?

It's just the right hand side of the case, with the crank. Oil pump is still attached. I have an old baking sheet in my shop I can put the case in. Maybe baste it with a nice little 5W-30? Ha!

Thanks,

Scott

marksbonneville · 12-05-2012, 06:52 AM

Quote:

Originally Posted by bagpiper22

I was going to go that route, but then figured with a puller on the way, I'd just wait. If I end up baking it, do you recommend a certain temp? For how long?

It's just the right hand side of the case, with the crank. Oil pump is still attached. I have an old baking sheet in my shop I can put the case in. Maybe baste it with a nice little 5W-30? Ha!

Thanks,

Scott

Remove the oil pump as you might as well replace the gasket anyhow. I put mine in the oven at 250 but the crank and bearing fell out before that point, the pinion tool was a waste of money for me, could not hold up to the pressure. Make sure you post pics of the parts in the oven if the wife or girlfriend sees them.

bagpiper22 · 12-05-2012, 12:16 PM

I'll try the oven. Just curious: did you do the sludge trap with bearing and pinion in place, or did you remove them after the crank was out of the case?

Thanks!

bagpiper22 · 12-05-2012, 01:13 PM

20 minutes at 250 didn't do anything. Even with a few gentle taps with a dead blow hammer.

Think I should try longer?

Voltaire · 12-05-2012, 02:24 PM

by putting the whole thing in the oven it all expands at the same rate. This method works for just the crankcase prior to dropping the bearing ( which you put in the fridge before hand) in on assembly.
I'd use a heat gun around the bearing housing.
I take it you fitting new bearings after using a hammer on them.

The puller fits over the pinion gear and pulls off without heat....well it should do.

On the 650s the three gears have dots that line up for the cam timing with one keyway on each, although I have ones with 3 keyways that require dial guages to set up...

Earlier models have a timed cam breather but I'm not sure on the 750's.

Have fun with your Triumph.

bagpiper22 · 12-05-2012, 03:58 PM

Well the puller came today and after a little bit of wrestling, I got it over the gear and without too much effort, the gear came off! Meanwhile the crank is still firmly stuck in the bearing, so I'm not done yet.

concours · 12-05-2012, 05:17 PM

Chant with me.... heat gun, heat gun...

concours · 12-05-2012, 05:23 PM

Quote:

Originally Posted by bagpiper22

Well the puller came today and after a little bit of wrestling, I got it over the gear and without too much effort, the gear came off! Meanwhile the crank is still firmly stuck in the bearing, so I'm not done yet.

Don't feel bad, my crank inside the bearing had been peened over with an AIR HAMMER!

concours · 12-05-2012, 05:41 PM

Quote:

Originally Posted by marksbonneville

Remove the oil pump as you might as well replace the gasket anyhow. I put mine in the oven at 250 but the crank and bearing fell out before that point, the pinion tool was a waste of money for me, could not hold up to the pressure. Make sure you post pics of the parts in the oven if the wife or girlfriend sees them.

You got it all wrong... wifey went OUT for the evening so the three boys could shrink fit new sleeve in a Trident cylinder.. and drink beer

concours · 12-05-2012, 05:43 PM

Quote:

Originally Posted by Voltaire

by putting the whole thing in the oven it all expands at the same rate. This method works for just the crankcase prior to dropping the bearing ( which you put in the fridge before hand) in on assembly.
I'd use a heat gun around the bearing housing.
I take it you fitting new bearings after using a hammer on them.

The puller fits over the pinion gear and pulls off without heat....well it should do.

On the 650s the three gears have dots that line up for the cam timing with one keyway on each, although I have ones with 3 keyways that require dial guages to set up...

Earlier models have a timed cam breather but I'm not sure on the 750's.

Have fun with your Triumph.

+1000 RTFM... it's IN there!

bagpiper22 · 12-05-2012, 05:46 PM

I've got a heat gun (electric type) so I can use that tomorrow. I'm just happy to have the pinion off in one piece.

concours · 12-05-2012, 06:05 PM

Quote:

Originally Posted by bagpiper22

I've got a heat gun (electric type) so I can use that tomorrow. I'm just happy to have the pinion off in one piece.

Is it a for-real HeatMaster industrial gun? You may still need a bit of judiciously applied propane torch in the general area around the bearing. Good luck!

bagpiper22 · 12-05-2012, 08:04 PM

I don't know if it's HeatMaster, but it's an industrial heat gun. I'll try that before anything else. It gets plenty hot.

I really appreciate all the help! I've gone through the manuals, watched all the videos, but when it doesn't do what it's supposd to, it's nice to have a group who've lived through it. Thanks.

12-05-2012, 05:17 PM	#54
concours WFO for 41 years Joined: Dec 2008 Location: Kensington, NH USA Oddometer: 4,012	Chant with me.... heat gun, heat gun... __________________ Too much is just barely enough..... 2007 Tiger 1050 2005 Royal Star Tour DeLuxe 1973 Yamaha TX750 1974 Norton 850 Commando Roadster

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12-04-2012, 08:18 PM	#48
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	I was going to go that route, but then figured with a puller on the way, I'd just wait. If I end up baking it, do you recommend a certain temp? For how long? It's just the right hand side of the case, with the crank. Oil pump is still attached. I have an old baking sheet in my shop I can put the case in. Maybe baste it with a nice little 5W-30? Ha! Thanks, Scott

12-05-2012, 12:16 PM	#50
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	I'll try the oven. Just curious: did you do the sludge trap with bearing and pinion in place, or did you remove them after the crank was out of the case? Thanks!

12-05-2012, 01:13 PM	#51
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	20 minutes at 250 didn't do anything. Even with a few gentle taps with a dead blow hammer. Think I should try longer?

12-05-2012, 02:24 PM	#52
Voltaire Studly Adventurer Joined: Jun 2011 Location: Auckland,New Zealand Oddometer: 734	by putting the whole thing in the oven it all expands at the same rate. This method works for just the crankcase prior to dropping the bearing ( which you put in the fridge before hand) in on assembly. I'd use a heat gun around the bearing housing. I take it you fitting new bearings after using a hammer on them. The puller fits over the pinion gear and pulls off without heat....well it should do. On the 650s the three gears have dots that line up for the cam timing with one keyway on each, although I have ones with 3 keyways that require dial guages to set up... Earlier models have a timed cam breather but I'm not sure on the 750's. Have fun with your Triumph.

12-05-2012, 03:58 PM	#53
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	Well the puller came today and after a little bit of wrestling, I got it over the gear and without too much effort, the gear came off! Meanwhile the crank is still firmly stuck in the bearing, so I'm not done yet.

12-05-2012, 05:46 PM	#58
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	I've got a heat gun (electric type) so I can use that tomorrow. I'm just happy to have the pinion off in one piece.

12-05-2012, 08:04 PM	#60
bagpiper22 Adventurer Joined: Jun 2012 Location: Norwalk, CT Oddometer: 18	I don't know if it's HeatMaster, but it's an industrial heat gun. I'll try that before anything else. It gets plenty hot. I really appreciate all the help! I've gone through the manuals, watched all the videos, but when it doesn't do what it's supposd to, it's nice to have a group who've lived through it. Thanks.