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How to avoid driving gear problems....
Posted: Tue Sep 29, 2020 10:26 am
by Peter Quambusch
Problem: When driving in heavy terrain, a lot of pressure (torque) is exerted on the final drive. This leads to movement of the pin (key), which then mushrooms the drive axle. Due to this, the Taper Lock breaks. Happened twice with my King Tiger and once with my Elefant.
mushrooming leads to the breakage of the taper lock:
Re: How to avoid driving gear problems....
Posted: Tue Sep 29, 2020 10:28 am
by Peter Quambusch
Solution: Washer and 5 x 10 cap screw to hold the pin in place:
Since installing, I never had the problem again.
Re: How to avoid driving gear problems....
Posted: Tue Sep 29, 2020 5:38 pm
by florian rudolf
Perfeckt solution Peter.
Re: How to avoid driving gear problems....
Posted: Tue Sep 29, 2020 9:55 pm
by simon_manning
It's always best to drive the Bigger Tank's with care, as the real German Tank crews were instructed, the big Armortek tanks behave very much like the real thing, stresses and strains to be aware of while Driving, The lighter models, stug, panzer 111, panzer 1V, even the Panther, Jadgpanther are a bit more forgiving, but the heavy vehicles, Kingtiger, Jadgtiger, chieftain, centurion, Tiger, a bit more careful, regards simon manning.
Re: How to avoid driving gear problems....
Posted: Tue Sep 29, 2020 10:57 pm
by Gerhard Michel
Hello Peter!
Well, I think that a tank is a tank and must be able to be driven like a tank, also if being 1/6 scale: logging small trees up to 2 m of height, crushing hedges and so on. This may cause some smaller damages, which may be repaired. That's real live of a tank driver (also full scale)
Therefore I appreciate your solution making your drive train stronger to avoid that kind of damage.
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 7:14 am
by Don Gray
Peter,
Very interested in this mod for my Jadgtiger.
I think I'm not understanding something, how does this actually keep the pin in place?
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 8:41 am
by yves mouton
Hello Don
The taper lock keep the pin on the drive axle, the taper lock is a cone chape and the inner side
of the sprocket is also a cone chape. You lock the taper lock in the sprocket by 2 grub screws.
To unlock the taper lock you screw out the 2 grub scews and there is a 3 hole there you put
1 of the grub srews in the hole and the taper lock comes out of the sprocket.
Best regards Yves
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 12:51 pm
by Peter Quambusch
Don Gray wrote: ↑Wed Sep 30, 2020 7:14 am
Peter,
Very interested in this mod for my Jadgtiger.
I think I'm not understanding something, how does this actually keep the pin in place?
Hello Don,
The washer keeps the pin (key) in place. W/o the washer, it will start to move outwards.
Regards
Peter
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 12:52 pm
by Peter Quambusch
simon_manning wrote: ↑Tue Sep 29, 2020 9:55 pm
It's always best to drive the Bigger Tank's with care, as the real German Tank crews were instructed, the big Armortek tanks behave very much like the real thing, stresses and strains to be aware of while Driving, The lighter models, stug, panzer 111, panzer 1V, even the Panther, Jadgpanther are a bit more forgiving, but the heavy vehicles, Kingtiger, Jadgtiger, chieftain, centurion, Tiger, a bit more careful, regards simon manning.
Thanks for your advice, Simon! That´s exactly what I was looking for...
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 12:53 pm
by Peter Quambusch
Gerhard Michel wrote: ↑Tue Sep 29, 2020 10:57 pm
Hello Peter!
Well, I think that a tank is a tank and must be able to be driven like a tank, also if being 1/6 scale: logging small trees up to 2 m of height, crushing hedges and so on. This may cause some smaller damages, which may be repaired. That's real live of a tank driver (also full scale)
Therefore I appreciate your solution making your drive train stronger to avoid that kind of damage.
Hello Gerhard, I fully agree with you!!
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 8:11 pm
by Christoffer Ahlfors
So, if the key has worked its way half way out, the excess load will start chewing on the shaft?
Re: How to avoid driving gear problems....
Posted: Wed Sep 30, 2020 8:15 pm
by Peter Quambusch
Christoffer Ahlfors wrote: ↑Wed Sep 30, 2020 8:11 pm
So, if the key has worked its way half way out, the excess load will start chewing on the shaft?
Jap, the further it moves out, the greater the mushrooming becomes.
Re: How to avoid driving gear problems....
Posted: Thu Oct 01, 2020 3:41 am
by Don Gray
Peter Quambusch wrote: ↑Wed Sep 30, 2020 8:15 pm
Christoffer Ahlfors wrote: ↑Wed Sep 30, 2020 8:11 pm
So, if the key has worked its way half way out, the excess load will start chewing on the shaft?
Jap, the furthe it moves out, the greater the mushrooming becomes.
This explains it! Thank you Peter. Mod added to the list. One more question (I always have one more question): How do you then retain the sprocket hub cap?
Re: How to avoid driving gear problems....
Posted: Thu Oct 01, 2020 7:56 am
by Peter Quambusch
Don Gray wrote: ↑Thu Oct 01, 2020 3:41 am
Peter Quambusch wrote: ↑Wed Sep 30, 2020 8:15 pm
Christoffer Ahlfors wrote: ↑Wed Sep 30, 2020 8:11 pm
So, if the key has worked its way half way out, the excess load will start chewing on the shaft?
Jap, the furthe it moves out, the greater the mushrooming becomes.
This explains it! Thank you Peter. Mod added to the list. One more question (I always have one more question): How do you then retain the sprocket hub cap?
Hi Don,
Nice to hear from you again. How far is your JT project?
To answer your question, I use grease on the KT and Tigers hub caps, the Elefant´s are held in place by cone head screws. Panthers have not been coverted yet, but will let you know, once done. For the JT, I have something diffrerent in mind.... I have to test it first, to see if it works. If so, I will post it asap.
Cheers
Peter
Re: How to avoid driving gear problems....
Posted: Thu Oct 01, 2020 7:54 pm
by John Clarke
This might help fitting the taper locks correctly. Pop this into your web browser. It will also show you the correct torque settings for tightening up the grub screws. I should add if the key fills the key way head to toe there is a fair chance you could crack the taper lock when you tighten up.
Fenner Taper Lock Installationwww.fptgroup.com › dss › docs › 690_06_Fenner_Taper...PDF