FRONT DRIVE

Graham Ord · Post by **Graham Ord** » Wed Oct 24, 2007 9:06 pm

As far as I can see off the drawings the front drive 3: 1 ratio gearbox is open to the air on the inside through the 19mm hole and 10mm hole. Does it really need the 10mm hole? and can the 19mm hole be sealed better.

Roland Wallick · Post by **Roland Wallick** » Thu Oct 25, 2007 9:22 pm

Graham
As far as I know there is no reason for the 10mm hole. But I am glad it was there, because the motors did not line up with the drive gear. That hole is centered on the drive gear but the shaft on the drive gear is 12 mm.

I drilled mine out to 12mm+ and flipped the gear around to stick the shaft in the hole to aid in placing the motors.
The holes in the floor of the tank needed to be slotted towards the rear about 3 mm. As for the larger hole, it could be smaller, but you could be asking for trouble as well. The pinion gear is pinned the the motor shaft and for some reason does not sit completly outside the tank hull. Also the larger hole could be a little higher.
As for the motor not lining up I could not tell if the mounting holes were in the wrong location or if the tolerances of all the parts between the two points added up to the error, of if it was the fact that the motor mounts were made 5 years after the tank by another person (Mark vs Jon)

Graham Ord · Post by **Graham Ord** » Fri Oct 26, 2007 9:07 am

Roland
It appears you do not have any lubricant in the box. Can the 10/12mm hole be plugged and some kind of seal added to the 19mm hole. Or is lubricant not required?

Roland Wallick · Post by **Roland Wallick** » Fri Oct 26, 2007 6:59 pm

Im not sure what you mean by 'in the box' In the photo above I have the drive gear in backwards for lining up the motor. This is a shot from the inside with everything in place.
The small hole can be pluged but the larger one would be a challenge since the pinion gear does not clear the hole.
Yes I use all purpose grease on the gears. A little to much here, Ill have to wipe some off or it will be all over the place on the first run.

Graham Ord · Post by **Graham Ord** » Fri Oct 26, 2007 8:40 pm

Roland
I mean lubricant inside the 3/1 ratio front wheel drive, looking at your latest photo it would seem possible to fit some kind of seal in a housing bolted to the inside of the tank side to prevent excess grease getting through to the electrics of the tank. I will only know when I reach that stage of manufacture. Thanks for the information reference the hole position and use.

Roland Wallick · Post by **Roland Wallick** » Sat Oct 27, 2007 11:36 pm

No problem, just post away, any future questions. I see youe welding your tank, thats the way to go I think, when ever possible.

leesellars · Post by **leesellars** » Sun Oct 28, 2007 7:12 pm

Hello Chaps

As ive not got a PZ4 i tought i would check this thread out.
As ive built the other ones in the range and exsperience i might point out that the Drive sprocket is the old type ( two pieces) where as the ones now are one piece. When my tiger was like that it when running it ripped the screw holding to two together apart.
Also ive noticed is that the motors must be bolted to the side plate as the motor will bend the base plate and disengage and rip the caseing apart.It did on my Mid tiger and it had to be modified to the new set up.
I dont know of any running PZ4s or seen one running. But it might make things run better??

Lee

Graham Ord · Post by **Graham Ord** » Sun Oct 28, 2007 8:49 pm

Lee
Thanks for the information. I will bear it in mind when making those parts/assemblies. However I note that the motor assembly instructions call for opening out 8 holes in the hull floor to 4mm for fitting CD0701 (motor mount) supplied with the motor kit. Presumably this is to add strength and help stop your problem.

leesellars · Post by **leesellars** » Sun Oct 28, 2007 9:57 pm

Hello Graham

Im not sure that will do! The motors are very torquie and will bend 4mm plate! I dont know if Mark will give you dimmentions of a collar to fit the motor to the hull side as the Tanks from mid tiger upwards have.

Lee

Roland Wallick · Post by **Roland Wallick** » Sun Oct 28, 2007 11:51 pm

Lee
I would think the Pz4 have smaller motors, Ill have to keep an eye on the floor, I plan to run it next weekend. May have to bolt a renforcing plate between the motor mounts and tank floor.
The sprockets are one peice on these tanks.

Post by **Armortek** » Mon Oct 29, 2007 8:25 am

Gentlemen

The Panzer IV is about half the all up weight of a Tiger. The motor that we supply is a smaller version and has less overall torque. We have never used the flange mounting system on the Panzer IV, and always stuck with the floor mounting. Although we no longer have a Panzer IV here, we have seen a number of customer models running with this system and it works well, giving the models good and agile performance.

Mark