BrakeDown...........

[andyroo]

It happens from time to time :-(

Just a little public thankyou to Chris (Sirhc) and Carl for getting me out of the p**

Saturday evening 9 pm. I had a final drive lock up on my CVR(T) Striker and came to quite a quick halt just prior to a roundabout. Carl was able to drive my Saladin down with recovery chains and Chris was able to help with roadside track splitting. Towed her 1/4 mile home and went back for the track in the van. Took the three of us around two hours. The police made an appearance but weren?t too conserned as it made a change from dealing with the drunks in Derby.

Whats frustrating is I?d just put £102 worth of fuel in!! Not only that but I?ve just finished replacing two oil seals and the brake seals on my Saladin wheel station. There was me thinking that I?d 4 MV?s all working at the same time.

I'll post some photos when we take the final drive to bits

[sirhc]

Andy,

 

Here's a couple taken with my phone... in between bashing the tracks! Quality is a bit rubbish though. It certainly was a memorable night, and the police were quite friendly and helpful.

 

You can never have everything working at once... time for another project I think!

 

Chris

[Simon Daymond]

at least it wasn't raining (was it?) Glad you got it all back safely, it's nice when you've got people to call. The Police are usually ok, it's just the odd one. I remember when I stalled an old AEC Mandator, in the middle of a teatime rush, the batteries were weak, and of course it wouldn't start. I managed to bump start it backwards after the police moved many cars :-)

[Marmite!!]

Crikey Andy.... just glad it didn't go when I was driving it at Beltring, that's one phone call I wouldn't of liked to make :shake:

 

 

Don't forget to make a vid of the damage/repairs for HMVF-TV

[abn deuce]

When the final drive packed up did you get thrown against your harness or did you have any warning it was failing ? I wondered if it came to a complete halt in a split second ? or did it drag to halt in a few seconds. Good thing if it had to happen that it was so close to home and you had all the tools to deal with it !!

[Marmite!!]

When the final drive packed up did you get thrown against your harness or did you have any warning it was failing ? I wondered if it came to a complete halt in a split second ? or did it drag to halt in a few seconds. Good thing if it had to happen that it was so close to home and you had all the tools to deal with it !!

 

 

Don't think the CVR(T)'s have a harness...

[sirhc]

Yes there is a seat belt, but it's not really a harness, just a lap belt. Andy was aproaching a roundabout at the time so wouldn't have been going very fast. It would have locked up and had the effect of turning the vehicle in that direction, which is why it's at a funny angle across 2 lanes.

 

You shouldn't go anywhere in any vehicle without a plan for how you're going to get it off the road and recovered if it breaks down, especially if the vehicle is armoured and tracked! Luckily Andy only lives a few miles from me, and between us we have plenty of vehicles, towing frames, tow ropes, track tools etc.

 

Chris

[andyroo]

Crikey Andy.... just glad it didn't go when I was driving it at Beltring, that's one phone call I wouldn't of liked to make :shake:

 

Don't forget to make a vid of the damage/repairs for HMVF-TV

 

 

If you ever have to ring somone up and tell them that there beloved MV has broken whail under your control, you start off the call with "Errrrr...... You've got a problem!!!" :-D

 

I'll have to call on Chris for a vid as I don't have a vidio camera. I'm hopeing to have a look on Sunday at the insides. It will be interesting to see why it's sezed almost solid. When I had a tracta joint go in the Saladin, there was a loud band and a grind but we were able to contine.

[andyroo]

When the final drive packed up did you get thrown against your harness or did you have any warning it was failing ? I wondered if it came to a complete halt in a split second ? or did it drag to halt in a few seconds. Good thing if it had to happen that it was so close to home and you had all the tools to deal with it !!

 

 

I got a warning about 1 second before she locked up and stoped. Fortunatly I was slowing down for the roundabout and only doing arround 5 mile an hour. The rear slue to the left a bit though so it was a good job the car that was next to me had left some distance between us.

CVR(T)s have a lap belt which I alway use as it stops me moving about too much in the seat.

I always carry track tools in the Striker though most of my other tools were in the Saladin as there is much more stowage space on that. We were due to drive both to the Cromford steam rally on Sunday. Needless to say we only took 1.

[AlienFTM]

I got a warning about 1 second before she locked up and stoped. Fortunatly I was slowing down for the roundabout and only doing arround 5 mile an hour. The rear slue to the left a bit though so it was a good job the car that was next to me had left some distance between us.

CVR(T)s have a lap belt which I alway use as it stops me moving about too much in the seat.

I always carry track tools in the Striker though most of my other tools were in the Saladin as there is much more stowage space on that. We were due to drive both to the Cromford steam rally on Sunday. Needless to say we only took 1.

 

 

CVR(T)s were always designed to be street legal, with lap belts for all crew. But never in seven years did I ever see one worn. Mind I am not sure when it became a requirement to WEAR them, They just dragged and got in the way.

[abn deuce]

I 'd say this would be a good example why they should be used , Just in case . something unexpected and sudden happens , Of course a good idea when off roading as well when the vehicle is making abrupt motions .

[AlienFTM]

I 'd say this would be a good example why they should be used , Just in case . something unexpected and sudden happens , Of course a good idea when off roading as well when the vehicle is making abrupt motions .

 

 

Absolutely right. Probably the main reason we didn't was because we were training for something far more deadly than a car crash ...

[sirhc]

How are you supposed to wear a seat belt when you're standing on the commanders seat so you can see whats going on while commanding? :dunno:

[AlienFTM]

How are you supposed to wear a seat belt when you're standing on the commanders seat so you can see whats going on while commanding? :dunno:

 

 

You are supposed to sit in the seat, belted in and winched right up until your thighs are trapped under the periscopes giving you an all round view without exposing yourself unnecessarily to enemy sniper fire.

 

You are supposed to then keep about five feet square of map in map case folded into something the size of a large shoe box inside the vehicle so that the map is not visible by enemy aircraft flying overhead. And turn the map every few minutes as you pass out of the few square miles visible on the map.

 

If the vehicle rolls, you are supposed to to drop the seat instantly by simply pulling on a handle, which may or may not work if you can find it under layers of clothing to keep you warm and protected aainst NBC attack.

 

You are supposed to also keep code boards and books to hand so that you can instantly transcribe and decode messages instantly.

 

Or you could drop the seat and stand on it.

[PeterMacD]

.....or you can have a phos grenade handy to lob in in case you can't find the Batco wallet! :-)

[Grasshopper]

I always drive CVRT's with one hand bracing against the edge of the hatch or the periscope mount. Being a "little person" means that my teeth are in line with the edge of the hatch, should the vehicle come to an abrupt halt. Could be nasty....

 

You can omly steer with one lever at a time, so you only really need one hand to drive with.

[andyroo]

Update on the Striker breakdown.

 

We removed the drive sprocket and carrier and undid the dozen bolts that hold the hub drive plate to the hub. Quite surprised when the thick brown grinding past liquid started to ooze out 

 

 

This gave concern that the left hand side could be as bad so we decided that the left track had to come off and that final drive be checked as well.

 

 

After draining and removing the radiator you need to move the brake calliper. The manual says undo the two bolts and swing the calliper out of the way. Ok for the left hand side of the vehicle but not I might add for the right hand side. The gearbox happens to be in the way. Took us twenty minutes to decide that it would be best to undo the brake pipe and remove the calliper as the final drive comes out. (manual now in bin!!)

The method for removing the final drive unit is fairly simple, a blanking bolt is removed from above the unit (7/8 UNC) and a steel bar screwed in and supported at the other end. (That’s what the logs are doing ) The two filler plugs are then used to hold a plate either side of the drive unit with a length of chain over the steel bar. The final few bolts that hold the final drive to the hull are removed an after a good kicking to brake the seal it drops out and is supported by the steel bar. Putting back should be a piece of cake!!!!!!!!!!

 

Now with the final drive on three axle stands Carl is removing the steel locking wire with the comment that twelve of the twelve bolts are loose.

 

 

 

Now this is the inside of a rather ill final drive!!!!

 

 

Two of the three pinions. The needle rollers have welded them selves in.

 

Edited August 9, 2008 by Marmite!!
photo link edit

[abn deuce]

Again it's good that if it had to happen it was close to home . I hope that spares are available for the pinions and bearings , Did any damage happen to the big ring gear can't quite tell from the photo's?. Its an interesting bit of engineering .Thanks for sharing your findings . I bet a few others who have that same HVM will be checking theirs over as well BEFORE it happens to them !

[Grasshopper]

I have had experiance of removing a final drive (we were changing its oil seal) and can recommend that when re-fitting, locate all 12 bolts before tightening them. We found it took a few goes to get the 12th in, as the weight of the final drive causes it to not sit square in its hole.

[N.O.S.]

Sorry to see the extent of your problem, however -

 

Mechanical gore..... :drool: :drool: :drool: it's been a while since such horrific pics were posted, I'm thinking the last few of the planetary will make a great screen saver :banme:

 

On a serious note, are parts readily available for these? If not -

 

It would not surprise me if they are a fairly standard planetary gear set, as they tend to be made by just a handfull of specialist manufactureres, e.g. Rockwell or Clark. Yep, good ol' Uncle Sam.

 

They should have manufacturers numbers stamped on, someone like ETS (transmission repairers) in Humberside are brilliant at importing parts from USA at very modest prices.

[sirhc]

These are British parts, since CVRTs are British vehicles. Parts are fairly easy to find, they are still in service and lots of them have been broken for spares. Andy has already found replacement final drives.

 

Chris

[Mark]

Are they expensive parts Chris??

[sirhc]

Mark,

It's all relative, they would have cost a fortune to make& then the MoD would have paid a large markup too. Take offs from scrap vehicles aren't too expensive, but then it all depends how much you need one doesn't it?

 

Chris

[N.O.S.]

These are British parts

 

 

But I was just wondering if the gearsets had been made in Britain, Chris? :dunno: I've been very surprised in the past at what is sourced by UK manufacturers of equipment from elsewhere (simply due to ecenomies of scale of manufacture), it's always worth checking, especially if and when parts become difficult in the UK. Some long-obselete stuff is still readily available from the overseas gear and axle makers as it might be fitted in some wierd bit of machinery elsewhere in the world.

 

Not quite an illustration of this, but we once needed a long, very thin needle roller bearing cage for the mainshaft in a Humber FV1620 gearbox. "Nobody has any, not been made for years" was the bearing people's response.

 

We then discovered (can't remember how) that a wheelbarrow manufacturer had bought up 20,000 or so of the exact part, and had been using them for years - we got hold of a couple for the cost of the postage!!!

 

And with regard to the last post, yes if they ain't about you have to pay the going rate, but please just read what I'm saying here - you might just be surprised to discover what was, and still is, made elsewhere and how cheap this stuff can be, but you have to know where to look, which is half the point of this forum isn't it? :dunno:

 

Pleased you don't have any supply problems at present :-)

[AlienFTM]

But I was just wondering if the gearsets had been made in Britain, Chris? :dunno:

 

There was a great stink about 1980 when it was discovered that Scorpion turrets sat on Russian bearings. There we were lined up waiting to take on 3 Shock Army: if we found ourselves not advancing backwards, would our target be the roller bearing factories so we could repair our own turrets?