KM Posted August 15, 2021 Share Posted August 15, 2021 Tr4A with a narrow belt on front, electric fan only. I have a bad oil leak from the timing cover seal that needs replacing before the RBRR. How do I get the pulley off and does it come off with the extension where the crank mounted fan would have been? Two photos show from above and below. All nuts removed from the front but bolts can't be removed until the pulley wheel is off. Levering on the timing cover is an option but I imagine its very thin and not designed for that. Quote Link to comment Share on other sites More sharing options...
mikeyb Posted August 16, 2021 Share Posted August 16, 2021 does that cross-member not unbolt? Quote Link to comment Share on other sites More sharing options...
KM Posted August 16, 2021 Author Share Posted August 16, 2021 Hi Mikey, it will do if necessary but how do I actually get the pulley off the crank shaft? Quote Link to comment Share on other sites More sharing options...
mikeyb Posted August 16, 2021 Share Posted August 16, 2021 It will almost certainly be on a taper, held on with a big nut under the extension. So if you can get the extension off, all should become apparant. If the extension is stuck, try tapping (not beating!) it with a hammer. Quote Link to comment Share on other sites More sharing options...
glang Posted August 16, 2021 Share Posted August 16, 2021 If its like the other Triumph engines it wont be on a taper but a keyed shaft. As you say undo the the big nut and the pulley should come off pretty easily. Of course if it hasnt been off in a long time it can be stuck - tapping and levering with a suitable piece of wood will free it.... Quote Link to comment Share on other sites More sharing options...
mikeyb Posted August 16, 2021 Share Posted August 16, 2021 Just pulled out the parts diagram, see below. Quote Link to comment Share on other sites More sharing options...
mikeyb Posted August 16, 2021 Share Posted August 16, 2021 It looks like the retaining bolt (15) passes through the extension as well as the pulley? Have you already got this out? Quote Link to comment Share on other sites More sharing options...
mikeyb Posted August 16, 2021 Share Posted August 16, 2021 2 minutes ago, glang said: If its like the other Triumph engines it wont be on a taper but a keyed shaft. As you say undo the the big nut and the pulley should come off pretty easily. Of course if it hasnt been off in a long time it can be stuck - tapping and levering with a suitable piece of wood will free it.... Yes you are right, not sure what engine I am thinking of re taper - 1300fwd maybe? Quote Link to comment Share on other sites More sharing options...
glang Posted August 16, 2021 Share Posted August 16, 2021 I was going to say I believe the TR4 workshop manual is available on the vitessesteve site for free download and it makes things so much easier..... Quote Link to comment Share on other sites More sharing options...
glang Posted August 16, 2021 Share Posted August 16, 2021 This seal can be difficult to get oil tight on some engines. There musnt be any wear on the surface where the seal runs and I believe that the old leather type seal has been remanufactured to address the problem... Quote Link to comment Share on other sites More sharing options...
KM Posted August 16, 2021 Author Share Posted August 16, 2021 So from the drawing I clearly have part 12 however it has a big hex on the end and it appears to be one part, see photo. I think 15 is for a starting handle which is not there. Would a big bolt be an alternative? If so I presume it extends to the crankshaft. If the possible bolt and the fan extension cone as 'welded/rusted' together will they come of together or will a woodruff prevent that? . Quote Link to comment Share on other sites More sharing options...
glang Posted August 16, 2021 Share Posted August 16, 2021 yes I can see in the manual that it says to undo that bolt and the complete fan extension and pulley will come off the end of the crank. In fact it looks as if someone has previously used stillsons on the extension to hold it. I would mark the position of the bolt head to be able to do it up to the same position again as the required tightening torque doesnt seem to be listed... Quote Link to comment Share on other sites More sharing options...
michael Posted August 16, 2021 Share Posted August 16, 2021 Remove extension undo retaining bolt,undo steering rack and. Move to gain more room then pull off crank.regards michael Quote Link to comment Share on other sites More sharing options...
KM Posted August 23, 2021 Author Share Posted August 23, 2021 On 16/08/2021 at 16:08, glang said: yes I can see in the manual that it says to undo that bolt and the complete fan extension and pulley will come off the end of the crank. In fact it looks as if someone has previously used stillsons on the extension to hold it. I would mark the position of the bolt head to be able to do it up to the same position again as the required tightening torque doesnt seem to be listed... With the car in first gear, hand brake and foot brake applied the bolt won't budge. Any ideas? Quote Link to comment Share on other sites More sharing options...
RobPearce Posted August 23, 2021 Share Posted August 23, 2021 10 minutes ago, KM said: With the car in first gear, hand brake and foot brake applied the bolt won't budge. Any ideas? Fourth gear is better. Much better still is a ring-gear lock that bolts in place of the starter motor. I made one from bits of steel bar many years back. With that fitted, I would feel confident to employ a pneumatic impact driver on the bolt. Or if you haven't got one of those, a very long lever bar. Quote Link to comment Share on other sites More sharing options...
KM Posted August 23, 2021 Author Share Posted August 23, 2021 1 minute ago, RobPearce said: Fourth gear is better. Much better still is a ring-gear lock that bolts in place of the starter motor. I made one from bits of steel bar many years back. With that fitted, I would feel confident to employ a pneumatic impact driver on the bolt. Or if you haven't got one of those, a very long lever bar. Thanks Rob, will order correct socket to go on end of very long bar. Quote Link to comment Share on other sites More sharing options...
KM Posted August 25, 2021 Author Share Posted August 25, 2021 1 1/8 socket and 200lb ft with someone standing on the footbrake and the pulley is off. Thanks for everyone's advice. Hopefully only the odd drip during the RBRR rather than an oily trail. Quote Link to comment Share on other sites More sharing options...
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