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  #31  
Old 28-11-19, 19:01
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John McMichael
 
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In the USA there are 2 or maybe even 3 in Minnesota at Drive-A-Tank, and also one more runner in New Zealand at Christchurch, used to be a tank driving adventure, ex-Vietnam vet.

Malcolm, have you counted the links in the track? I know there is an acceptable wear guide which allows for the removal of a link, maybe 2-3, can't remember the exact number. I remember a fellow in Australia who had removed too many links and the track was tight as a piano wire, eventually he ended up tearing off the idler or the final drive.

When we got ours it was new track but loose and it wanted to jump the sprockets...no fun tightening Centurion track without the proper ratchet tool!

Christchurch
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  #32  
Old 28-11-19, 19:13
Mike Cecil Mike Cecil is offline
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John,

Can't quite make out the ARN in your image - is it 169039?

Regards

Mike
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  #33  
Old 28-11-19, 20:59
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John McMichael
 
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Mike this is the info on the Christchurch tank that I have:

The tank is now called Maximus I believe but in Vietnam it was "Cromwell" C/S 2 was ARN 169039's last name prior to leaving SVN. 2 troop, C Sqn 1 Armd Reg.Tour date Dec 1970- Sept 1971.

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  #34  
Old 28-11-19, 22:30
Mike Cecil Mike Cecil is offline
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Thanks John, interesting to see where 169039 ended up.

I used that period image by Army PR photographer Bill Cuneen on page 301 of 'Mud and Dust'. The tank was named by the crew commander, 2Lt Ian Farrant, who told me during the interview I recorded with him that '...on taking command of 2 Troop, I discovered all four crew members of my tank were born in the UK and therefore thought it appropriate to give it an English name. As an avid military history student I was very much taken by Cromwell as a military leader and thus named my tank after him.'

More from that interview is presented on pages 146-147 of Mud & Dust. Nice bloke: very reasoned in his responses to my interview questions.

Regards

Mike
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  #35  
Old 29-11-19, 04:20
Malcolm Towrie Malcolm Towrie is offline
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John,
The tracks came new with 108 links. The users manual says when you use up all the threads available on the tensioner trying to set the correct sag, you need to remove a link. When you are down to 102 links, get REME involved.
That's 6 links you can remove, which surprised me since that's about 2.5 feet of track!
We've got 102 links on one track and 103 links on the other, so we're still good, barely.

The problem is when I loosen the tensioner nut off to slacken the right hand track, which is way too tight, the tensioner doesn't back off, even when I drive the tank in reverse. So it's jammed. Looks like I'll need to get medieval.

Malcolm
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  #36  
Old 30-11-19, 21:46
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John McMichael
 
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Malcolm

could you push the track up against some other heavy object? (another tank comes to mind) and just give it a push and see if the idler will budge backwards?



John
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  #37  
Old 30-11-19, 21:52
Mike Cecil Mike Cecil is offline
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John,

Depending on which type of idler is fitted (there were three designs), that method may risk breaking the idler.

Mike
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  #38  
Old 01-12-19, 04:50
Malcolm Towrie Malcolm Towrie is offline
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We got medieval today. Heat, pounding and jacking were involved, but the key step was tightening the tensioning nut back up with a 3 ft pipe wrench and a 6 ft pipe extension. This actually cracked the tensioning screw loose from its spherical seat bushing and with some more heat and jacking the track off the top of a road wheel with a 20 ton jack, we got the tensioner loose enough in the seat that a quick application of right hand neutral steer would pull the tensioning screw back.

The pic below may make my description easier to understand.

Malcolm

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