MIKES Posted June 8, 2021 Share Posted June 8, 2021 I need to make a hub nut spanner suitable for use on the Scammell Explorer rear hubs. I've got an illustration of the genuine TS.560 spanner to use as the basis but it would be useful to have some dimensions. Anyone have either a genuine one or home built copy that they could give some critical dimensions from? I know it's designed to be hit with a sledge hammer so needs to be substantial. Quote Link to comment Share on other sites More sharing options...
Butch Posted June 27, 2021 Share Posted June 27, 2021 Hi Mike I managed to convert a heavy duty 4 inch ring spanner l found by putting a couple of bends in the shaft of the spanner to clear the wheel studs , l will dug mine out and photograph it for you , the hub nut is the easy bit, the hub takes a few tons of pressure to pull off the tapered shaft and will require a heavy duty puller . Regards Butch Quote Link to comment Share on other sites More sharing options...
MIKES Posted June 27, 2021 Author Share Posted June 27, 2021 Hello Gary, I measured the nut and it was spot on 100mm so a tad under 4" but if a 4" fits then perhaps that's what I should be hunting for. Have a large open ended spanner which has been opened-out to suit but even with an offset in the handle, it clashes with the wheel studs so can't be used square-on so less than ideal. Did wonder why the nut would be a metric size across the flats. The hub on this Explorer (not my one) didn't need a puller as the nut had been loose and the whole lot nearly fell off with the wheel. Where it had been loose, the two keys had taken a bit of a battering so I've had to buy some key steel and make new ones. I do have a home-made version of the original puller so hopefully will be useful. Cheers Mike. Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted June 27, 2021 Share Posted June 27, 2021 2 3/4" BSF rings a bell from years ago, 99mm/3.9" AF Quote Link to comment Share on other sites More sharing options...
MIKES Posted June 27, 2021 Author Share Posted June 27, 2021 That could make sense as nut most unlikely to have been made to a metric dimension. Quote Link to comment Share on other sites More sharing options...
ploughman Posted July 4, 2021 Share Posted July 4, 2021 Is this the sort of spanner you mean? Approx 3 inch across. Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted July 4, 2021 Share Posted July 4, 2021 Back in the 70's/80's I worked on Explorers when they were still in service. We had the hub tools, the spanner resembled a large tube, probably at least 5 inches in diameter and from memory a couple of foot long, one end had the hexagon ring in it to fit the nut, the other end had a very thick steel bar welded at one end to the tube, about 3 feet long. There was also a heavy length of timber, cross section similar to a railway sleeper with one end radiused concave. This was stood on end to support the bar end of the tube. One man would hold the spanner on to the nut and down on the block with the other man wielding a 14 pound sledge hammer on the end of the bar. That is how tight it had to be. Once the nut is off, the hub puller consisted of a modified axle hub cap with a large diameter screw threaded in to it, with the hexagon head same size as the hub nut. Spanner and block refitted and sledge hammer applied again to release the hub off the taper. The hubs have to be very tight as the key should not be taking the load, it is the taper fit that does that. If slack the tapers will wear and never lock together. I recall having to replace badly worn shaft and it took about 50 tons on the press to release it from the gear wheel. Hard work, but loved working on these old girls! Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted July 4, 2021 Share Posted July 4, 2021 (edited) Originally posted by Andy, these are the genuine service tools. Trying to link to a previous post but having trouble...... Edited July 4, 2021 by radiomike7 Quote Link to comment Share on other sites More sharing options...
MIKES Posted July 10, 2021 Author Share Posted July 10, 2021 Thank you gentlemen for taking the time to reply. Radio Mike is spot-on with the 2 3/4" BSF size and I've decided to get a laser cut blank (about 1" thick) to suit and weld this to a piece of tube and add the hammer bar so it kind of replicates the genuine tool. Ploughman, unfortunately a slogging spanner won't work due to clashing with the wheel studs. Would have been a good solution otherwise. Quote Link to comment Share on other sites More sharing options...
utt61 Posted July 10, 2021 Share Posted July 10, 2021 100mm impact sockets are readily available in standard and deep lengths in 1"and 1.5" square drive from Impact Socket Supplies, albeit not cheap. (ISS are fairly generous with discounts if you ask nicely though). Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted July 10, 2021 Share Posted July 10, 2021 (edited) Given up on linking to the post so here are the genuine tools, note the stand which takes the place of the timber that Richard mentioned. Edited July 10, 2021 by radiomike7 Quote Link to comment Share on other sites More sharing options...
MatchFuzee Posted July 10, 2021 Share Posted July 10, 2021 Also discussed earlier:- https://hmvf.co.uk/topic/14968-scammell-explorer-rear-outer-hub-nuts/ Quote Link to comment Share on other sites More sharing options...
MIKES Posted July 11, 2021 Author Share Posted July 11, 2021 That's hopefully what mine will look like - watch this space! Quote Link to comment Share on other sites More sharing options...
MIKES Posted July 11, 2021 Author Share Posted July 11, 2021 On 7/10/2021 at 1:36 PM, radiomike7 said: Given up on linking to the post so here are the genuine tools, note the stand which takes the place of the timber that Richard mentioned. Pure Scammell porn. Just wonder where they all went to. Looks like the slogging bit of the hub nut spanner is about 2 foot long. Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted July 11, 2021 Share Posted July 11, 2021 1 hour ago, MIKES said: Pure Scammell porn. Just wonder where they all went to. Looks like the slogging bit of the hub nut spanner is about 2 foot long. Yes, needs to be at least 2 foot long and thick so you can use a 14 pound sledgehammer to tighten it. Quote Link to comment Share on other sites More sharing options...
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