Churchill Suspension | Ep. 4 | Tank Workshop Diaries | The Tank Museum

Churchill Suspension | Ep. 4 | Tank Workshop Diaries | The Tank Museum


ladies gentlemen welcome to our fourth
episode of the tank workshop Diaries thank you again for your positive
feedback and the comments and the question have had we are in one of our
vehicle sheds with vehicle around me as you can see a lot of the vehicles we use
regularly for tanks and action the chieftain the Leopards behind me here
and that’s a project for the future of Warrior Project and the t-34 that’s
against been parked up there only have time to actually work in it properly a
lot of these vehicles will also be going out for TANKFEST it’s only four weeks
to go for TANKFEST and the guys in the workshop are flat out at the moment
preparing for all these vehicles we have just under 350 vehicles out for TANKFEST
as an update on the last episode we’re working hard on the churchill mark 3 one
of the key vehicles we’re trying to get ready for TANKFEST first the engine is has now been placed back in the hole and all plumbed up so that’s ready to go Bob
made a specialist tool to test our hydraulic systems and a lot of the
systems are hydraulic hydraulically operated on that on the Churchill so
tell more about that and last time as well they showed you how they made a
tool to disassemble one of the suspension units and let’s start with
that side of it to see how that tool is being used we’ve got this steel back from the laser
cutters and as you can see although the profile of the tool actually runs down
here we’ve had an extra bit added on the bottom the purpose of that is so that we
can put it between centers on the lathe and then turn it into round and put the
thread on later we’ll cut this bit off and then it’ll match the profile on the
engineer and drawings we’ve also made the pins that go in the bottom and if
you remember they’ll go into the plate at the bottom of the spring in order
that we can compress it they’ll obviously be two of these at the top
then we have the thick piece of steel that goes across the top of the
suspension unit and both of these threaded bars go through the holes and
then we have a couple of slip washers and finally a bolt and by screwing down
on these bolts either side of the plate will then compress a spring and be able
to move the plate from underneath wonderful cannot from drawing to
manufacture first time it’s been done in some here yeah right Thanks we also had to do an awful lot of work
on this ta wheel the bearings were completely shot and the seals were gone
there hadn’t had much oil in a while and so it had to be stripped and completely
rebuilt just to highlight the best practice and why we do that if I roll
the one on the left hand side that’s now been completely serviced and the one on
the right you’ll see that the one on the right that still needs work doing to it
comes to a halt a lot quicker and this one spinning nice and freely
that’s Judah to old oil barons that need cleaning seals often you can strip these
apart and put them back together again and they’ll perform much better but it
just sort of highlights really why they need to work on the suspension because
this is down to resistance the more resistance you create and multiply it
through all of the running gear means the engines got to work harder in order
to overcome it and if it does that then it increases wear on the engine and
reduces its life so it’s always a good idea where you can to service all your
engine having completed all of the engine
testing on the stand the next stage is to put the engine in the tank itself and
you can see now the engine is in position and it’s all been plumbed in
and connected up because of other controls that control by the driver a
hydraulic we now need to know that when for example the driver presses down on
the accelerator pedal the engine actually accelerates at this end and
Bob’s made a test rig in order for us to do this on the bench
the Churchill has got quite a complicated hydraulic system for its
controls so the brake throttle the clutch and all the steering is operated
by hydraulic cylinders to make sure these are functioning correctly before
we fit them into the vehicle we’ve made up this simple test rig that’s the
master cylinder so what we’ll do in terminal 2 in turn test each master
cylinder for the separate systems together with its slave which is the
other end the sweetcorn thing actually acting as a hydraulic reservoir a moment
for the fluid and then I’m just operating by hand in the vehicle
normally beyond a foot pedal or the steering tiller this particular example
here is part of the clutch setup you’ve got the master cylinder there this is
part of the slave cylinder system it’s a slightly complicated on the Churchill
you know it’s an air server assisted hydraulics so you’re actually using the
hydraulic system to open a small piston in there which then opens an air valve
that’s air at 80 pounds per square inch through the valve in there which then
operates this air servo which pushes on the clutch withdrawal system in the vehicle there’s a compressor
driven off the gearbox which gives us 80 psi air pressure to operate all these
subsidiary systems we’re running off a ring main hydraulic an air ring main
which we’ve set to a key PS I’ll just put the connection on there so there’s
no air into the air side of the system that’s the hydraulic side I move back
here now and operate the lever what’s that is done the hydraulic side has
opened an air valve which has let the 80 psi air into the system the servos in
advance I simulate the redraw spring and they close it up and we’ll repeat that one of the problems we’ve got with this
particular part of the system is that over a period of time say about 15-20
minutes after we’ve initially bled the system on the rig is that it’s getting
air migrating back into the hydraulic system and therefore stopping it
functioning so somewhere along the line there’s a seal not operating correctly
inside the system I suspect I’ve checked any external links we don’t seem to have
any of those so it’s almost certainly going to be something in there so I need
to go on inspect that find out what’s wrong with it fix it and insert it back
up again test it to my own satisfaction what we normally do is then leave it
overnight something like that and then if it’s still functioning in the morning
we’re reasonably happy that everything’s okay this is exactly the reason why we
do this on a tip on the bench because it’s much simpler to do here than inside
the vehicle where as I mentioned earlier we had 16 feet of piping the way puts
the rest of the vehicle and an engine and everything else so if we’re happy
with this the only thing that can possibly be wrong in the vehicle is any
malfunctioning inner pipe work just to orientate you and the engines
now in and in the front as we’ve already explained in between the engine and the
gearbox that goes in this big space that we have here is the clutch and the
cooling fan which will bolt on the back of the flywheel of the engine if you
think back to the Matilda Diaries and issues that we had with the gearbox
because it was so tight and there was so much going on you can see here how much
more room we’ve got with the three simple mounts know also that there is no
coolant pipes going underneath it all of the pipe work is all nice and neat and
going over the top so they have kind of learned some lessons from the Matilda so
compared to the Matilda then you can see from the open space down here that it’s
a much simpler lift and not only that but actually once you’ve got it in
there’s a lot more room to play with around the outside of the assembly we’re here in one of our vehicle shirts
where we keep a lot of the running vehicles for the season and the warrior
we’ve added to our running list again and a lot of the work was done by
Alistair who’ll be talking about it next what he did to the vehicle
we had a fuel starvation problem it turns out it was caused by an algae and
the diesel so it’s clogged up a lot of the diesel lines and the filters so
Alistair would talk more about what he has done to clear all these lines to
make the vehicle running again we’ve used it during our tank selection
display and it will be used again during tankfest later this month hi this is our
warrior command vehicle and suddenly we’ve got a bit of an issue with her
we’ve found there’s a problem with our fuel system this here is our fuel tank
and to the left the fuel tank we have what’s known as the collector tank and
what we’ve ascertained is the vehicle was actually been running on all the
field that was remaining in the in the collector tank there and as a result the
collector tank is obviously emptied and we now have fuel starvation issues so
what we’ve got to do is basically every single pipe we have to try and clean out
get all this contaminant out of it there’s a lot of contaminant in there
just looking on it on the end of the screwdriver there but this is one of the
fuel pumps here and you can see how the contaminant has got into the pumps who
will be able to clean these so you can see the veins of the pump there you can
see the buildup and terminan walk through so it’s pretty the process of
giving it a good clean flushing it out that will resolve the issue and should
be up and running soon as as well as our permanent staff we also
have workshop volunteers who two weekends a month come in in order to
work on projects such as this this is Matilda – it was used as a gate guard
and it’s now been donated to the museum so that we can transfer it into a desert
vehicle for our new World War two display which is opening next year as
well as tin work on the outside and working on the track adjusters there’s
also bigger jobs such as repairing this broken a towing eye not only are they
working on the Matilda – but they’re also working on the dingoo this is an
opportunity for the workshop staff the permanent ones and the workshop
volunteers to work together our guys down the new workshop were building the
gearbox and the main engine for this vehicle whilst the volunteers do the
paint job which has been transferred the other way from a desert vehicle back to
a Western European one on these pallets around me our
suspension is off of one of our challenger one main battle tanks they’ve
currently been overhauled by Horseman defense systems the original
manufacturer of higher gas units were actually in the process of waiting for
another six units to be delivered so we can then do the repair to our challenger
one which will be seen running at tank Fest this year the actual overall we
also documented in a future episode of workshop tires so here we are in one of the other
vehicle she has an F shet as we call it on our Polish t-72 we had some fantastic
support a few weeks back from our Belgian colleagues from the National
Military Museum in Belgium the war heritage Institute as they’re called now
because they have a lot of experience with T tanks because they have been
operating over quite a few years and have a Polish gentleman France who has
been coming over with Dani to help us with that t-72 and I type 59 and some of
the work we have done on the t-72 is we always we put new tracks on at last year
but it’s jumping tracks at the moment on the sprockets they drop the sprockets
round because really you need to produce pockets on when you change track but at
the moment we do not have any spare set so if any of you can help us with a set
of t-72 rear sprockets we would appreciate it because we need two new
ones so until that’s resolved the vehicle will not be used we using our
other our sandy t-72 for tankfest instead but they did also some great
work inspecting the vehicle with us that our technicians understand better what
exactly it is that is important to look after we changed quite a few of the
filters we did some engine tuning and the engine runs better than it has ever
done so thanks again to our colleagues Danny and Franz in Belgium who will be
coming back to the tech museum for tank fest in four weeks time with their
Sherman Firefly as a guest vehicle but we’ve done this a lot more in recent
years working with other museums or with operators that have particular
experience on a vehicle because we find out it’s the best way to teach our staff
and volunteers how to operate a vehicle how to maintain the vehicle so it’s a
good partnership with other museums we have established over the last few years so with literally four weeks to go for
tank first we are now in the busy period in the workshop getting everything ready
we have just under fifty vehicles for tankfest lined up this year the vast
majority are ready to go we still have two vehicles on the display fleet side
the chieftain ARV the armored recovery vehicle and the type 59 tanks still
being worked on and Alistair and Rory will talk in more detail about these two
vehicles well here we are in the business end of a t59
this is another vehicle that we’re trying to prepare ready for tank fest –
coming tankfest we’ve had a plethora of problems with this vehicle it came in
initially for the bearings on the clutch and the contamination on the break
throughs where I’m actually stood is where the actual transfer box is we had
to take the transfer box out required a couple of gaskets to be replaced on that
which was now completed we had to remove the gearbox which basically is where
understood now with the gearbox out what was exactly wrong with the clutch we
found out to be the output bearing on the the main shaft and also the bearing
on the release bearing had gone fortunately one of our surprise has been
able to come up with the bearings once that’s been completed and the clutch has
been rebuilt we can then put the the actual gearbox back in position the
transfer box which sits in along this side of the vehicle here and on top of
the transfer box is actually the starter motor so a fair bit of work to do but
we’re confident that we’ll be able to get it done ready for you all to see at
tankfest this year another vehicle that’s appearing at tankfest would be
achieved in half we brought it in because we had some problems of the HTT
ram which is a hydraulic tensioner weld at the back of it it cracked which
caused it to leak which meant that we had to replace it with the new one
that we’ve got now all that’s left to do now is to fit the stub axle the refit
the idler wheel and then we can put the track and then we can take it on the
road test to make sure it works as it should be don’t forget to leave your comments on
the YouTube channel we always read them and please subscribe as well so you can
follow us with all the future episodes keeping you posted and updated on the
project here at the tech museum if you wanna support us please also join the
patron scheme it really goes directly to what we do here at the Museum so thanks
again bye-bye

100 thoughts on “Churchill Suspension | Ep. 4 | Tank Workshop Diaries | The Tank Museum”

  1. To be truely British, that Hydraulically – actuated Pneumatic servo should operate a contactor for an electric solenoid actuator…

  2. I think Parola tank museum should have spare sprockets. Maybe ask them? Also they are quite close to FDF who also might have them available (their all t-72s were sold as scrap)

  3. That would be a nut, not a bolt. The little bitty part that goes on the end of a threaded shaft or " bolt" is called a nut.

  4. Oh my. I am a natural born wrencher, but how in the world do you get a job like this? Extremely incredible.

  5. Hello!
    I can never get tired watching this series!
    That's the kind of work I would have liked to do…
    Thank you!

  6. How many guys are working there?

    Employees or volunteers cause it looks like an army of different ants or bees working … if you compare video by video.

  7. I recall, from my farming days, how much the bearings, roller or ball, were standard sizes, and sometimes a tractor-manufacturer-boxed bearing would have the same ID number as a generic. And then there was sometimes the wrong bearing in the neatly labelled box (I drove a long way, that day).

    I wouldn't really expect a WW2 tank to have bearings that could be matched from current production, though I know we once had to fit a Russian-manufactured bearing on a Massey-Ferguson, and it didn't really last, but how standard are the bearings you have to replace? How much is it finding really old-stock spares, how much is still being made?

    I know that military vehicles tend to get retired when parts stocks get too low: you need the spares to fight a way, as well as more obvious things such as ammunition.

  8. As for T-72 sprocket wheels. I just have an idea, there is a Museum of Armored Weapons in Poznan, Poland. Did you try to reach them? They may have some spares or be able to facilitate trade of spare set of sprocket wheels through theirs contacts in polish military (as there are heavily modified T-72s – as P-91 "TWARDY" in service still). Don't know if this will be possible, but maybe worth to try 🙂 Good luck!

  9. Being a mechanically inclined person that I am, I am in awe of the pride and craftsmanship that is on hand in this shop. It is also one of the reasons I enlisted in the airborne infantry instead of the armor corp. Great work.

  10. Man , it's awful to think about being a Field Recovery/Repair Royal Engineer trying to fix up a Churchill , that's one Heavy darn Wheel + Suspension

  11. Churchill said about the Churchill tank
    "they gave my name to something ugly, fat, slow and unreliable… it fits perfectly well !"

  12. Great programmes giving an real insight into the trials and tribulations of running restored military vehicles.
    Good to see the repaired vehicles roaring away on the track. Must be with real satisfaction for the permanent and volunteer staff to see the vehicles running smoothly under their own steam after all the hard graft that goes into maintaining the fleet.
    Many thanks for all the hard work you all put in keeping these magnificent vehicles running. Proper job !

  13. Warning spring can kill , don’t get in line of fire when compressed and fitting, you won’t appreciate how much energy goes off so quickly till you see one go, take extra care with new and old tools , good luck.

  14. I hope that you can one day get the Excelsior and the T14 back up and running, two amazing looking vehicles. And the last of there kind.

  15. 14:40 – It feels so nice to know you have a polish armour in your collection 🙂
    Did you try communicating with any polish officials in order to acquire those parts?

  16. These segments are by far my favorite programs from the Tank Museum. Thank you. I hope to see this stuff in person at some point!

  17. We need more. I have so many questions.
    Anyway, another great upload from the Tank Museum. Thanks for that. Cheers

  18. Awesome work there guys. . Always interesting …both my two girls…Natasha 5 and Mikayla 3.. love tanks.

  19. About the T-72 sprocket wheels: when refurbishing the running gear on bulldozers, it's common to "fill" the sprocket wheels with a specific type of welding rod, then grind the excess. Don't know if this is possible with the tolerances on tank mechanics, but anyway… just trying to help.

  20. Since I saw episode 1, I knew I would continue watching this. This is really good content, well done guys.
    One question: Remember the Jagdpanther that was featured in episode 2 & 3? What are you planning to do with it?
    If it's a restoration project then good luck! 🙂

  21. master milo is currently restoring a "t69 type 2" with seized tracks do you have a good way of fixing completely seized tracks that are rusted together?

  22. The Churchill had thick armor. Fairly wide tracks. High ground clearance. A rather spacious interior – at least in the driving compartment. What seems to me to be a simple suspension system that was easy to maintain. I wonder therefore, what were its drawbacks?

  23. Hi from New Zealand. 2018 around June I and my wife were in England visiting her family. I had one wish. To go to the Tank Museum. We got there about June 2018, spent all day looking at everything. I loved it. Next trip to England will be in August so i can get to your Tankfest. So until then I watch and listen to every word from your Tank Workshop Diaries. I think you all are doing a brilliant job. Thankyou.

  24. I want TOG2 how much money do i need to throw at you guys to fix it up and have her lumbering around the arena? Its one of those tanks that are iconic and absolutely one of a kind. Itd be more popular than your tiger

  25. I work as a mechanic at a Dutch company that makes filtration systems for diesel fuel. These systems filter out sediment, microbiological contaminants and water. Looks like you could benefit from it by the state of that warrior's fuel system. www.njordfiltration.com

  26. I love this, These lads really get to the point of whatever it is we are looking at, and with enthusiasm as only someone who really likes what they are doing does!
    And also the cuts between information is really good, none of that History channel explanation every 5 mins what they are doing, what they are going to do, and what has happened the last 10 episodes of cutscenes, Information wich has already been on screen the last minute of you watching being regurgitated over and over.

    I love these episodes, Please dont stop!

  27. This Chris Van Schaardenburgh sounds a tiny bit dutch, but I assume he lost some of his accent living in the UK?

  28. fascinating stuff, bit alarming that all that butch engineering in a Churchill can be brought to a halt because of a faulty seal in a hydraulic throttle

  29. Does the newly donated Matilda 2 have any internal fittings such as an engine, gearbox and turret basket?

  30. is all this massive workshop centre new? because I've noticed that the 2018 display was vastly superior to the previous years.

  31. I love the whole video series. It's great seeing the skill and knowledge of the persons actually rebuilding and maintaining these incredible machines.

    I was a bit suprised at how extensive the use of hydraulic actuators was. How great was the risk, through battle damage or simple mechanical failure, that hydraulic fluid was sprayed into the tank's interior? Perhaps I'm wrong, but I assume the fluid was as flammable as modern hydraulic fluid. I shudder just thinking about how horrible it'd be inside the tank if that happened.

  32. Safety Glasses? Working on a 60-70 year old compressed metal spring without Safety Glasses? Well, one bloke had glasses on. Who wants an Eye Patch!!! Other than that reminds me of changing the Bilsteins on my old Scirocco!! Thx

  33. Please consider a reality TV show based in the workshops/museum. With the characters down there, I imagine it would become addictive viewing.

  34. You can tell these are ex-military or techies / instructors. They can talk about a subject clearly with no errs ummss or ahs or pauses. Its a natural confidence borne of training, their own expert knowledge and character. Makes me very proud as a Brit that we've made the worlds premier Tank Museum. I hope the US sees this as a challenge and saves things like the USS TEXAS, and we all collectively up our game around the globe to preserve our herritage.

  35. These videos are priceless. If these were on TV they would be ruined with dumb commercials and abhorrent editing and unnecessary drama. You guys rock.

  36. thank you very much this is something I think a lot of us have been looking forward to after the Matilda diaries. really enjoy seeing the shop work on the tanks and equipment . thank you again

  37. I am totally gobsmacked!! – when i see three men working so hard to get just one bolt out of the track, one understand the tremendous work they doo, and what effort that goes into restoration of these lovely vehicles, – i really lift my hat off and bow!! – greets, Levi from Finland

  38. I'm really enjoying this series. Thanks to all the hard working folks that are doing all this work – the dirty work of restoration as well as the very good production work. We're privileged in that the technicians and engineers that are doing the restoration work are also so good at describing what they do. That's rare.

  39. Absolutely brilliant video…..fabulous work and dedication from you guys.I'm just working on a very large scale Churchill mk3….scratch built from steel……this video inspires me to increase my efforts.

  40. Go behind the scenes of Tank Workshop Diaries with the Workshop Experience https://tankmuseum.org/whats-on/experiences/tank-workshop-experience

  41. Hello to Bob Darwood, long time no see old pal . Glad to see your still keeping busy. What is Dave Arnold up to these days. Best Regards Martyn Durkin AKA Durks.

  42. It's the mechanic in me that loves this. One of the best videos I've seen. Got a walkthrough and a lesson in hydraulics. Nice work.

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