Hewland FT200/MK9 Pinion Setting Jig(s)

[Lee Johnson]

WANTED -- Pinion setting jig(s) for Hewland FT200 and/or MK9 trans-axles.

Thanks,
Lee Johnson
575-758-2434 Home or PM to me

[S Lathrop]

For the Mk 9, you can make one with a VW side plate and a large diameter tube. I turned the tube to have the correct diameter to reference the pinion and turned the other end of the tube to press into the bearing mount in the side plate. It worked very well and cost a ton less than the Hewland tool. You could do the same thing for the LD200.

[socaljeff3798]

Can you post a picture of it? Or PM me?

jeff

[tige00]

Pics would be great

[gonda]

Does the VW side plate fit the LD200 or would I need an LD200 side plate?

[Pi_guy]

Does the VW side plate fit the LD200 or would I need an LD200 side plate?

LD side plate

[Lee Johnson]

Steve -- That is a great suggestion, thanks! I'll pursue that unless unless some bargains fall from the sky.

Lee

[S Lathrop]

Here are 2 pictures of the pinion setting fixture. The diameter of the tube in front of the pinion is 120 mm (4,7 in.). The side plate is from a swing axel VW tranny ( FV type).

[Bobsy SR 6]

Steve
Thanks. What is the srandard measurement to the pinion. I realize the number etched into the pinion is the number to look for. In other words is the 4.7 inches the same mearsurement of the hewland tool?
Thanks again
Tom

[S Lathrop]

Steve
Thanks. What is the srandard measurement to the pinion. I realize the number etched into the pinion is the number to look for. In other words is the 4.7 inches the same mearsurement of the hewland tool?
Thanks again
Tom

The diameter of the tool is 120 mm. You measure the distance between the pinion nose the tool. Even with the tool, I always use bluing to mark the pattern on the ring and pinion teeth.

[Bob L.]

Steve said 120mm.... that's 4.724/5", not 4.7".

Lee Williams in an old apex post said it was 4.71"....in that post he said # came from data sheets sent from Hewland in past....

I used his number to check old gearbox (before teardown) that was marked for .020 feeler and came out .008... (didn't have a jig, so backed out CL to side plate machined register dim. then projected from end of pinion to register...indirect, but just numbers..no reason not to work...) Didn't know if issue was with prior gearbox build, or my numbers... however, if 4.71 wasn't right.....????

Anyway.... seems if numbers from Hewland are in the 20 mil range, we should have a better idea of what the right dia. is for fixture.... a lost 24 mils... ???

someone measured the Hewland "factory" jigs?

Of course blueing is best check....we did that on most of our large geartrains (20,000HP and down)....but would be nice to get in right ball park to start..

Okie

[Bobsy SR 6]

Guys
There is another set of numbers etched into the pinion that represents the distance from the face of the pinion to the center line of the diff carrier shaft(were the output shafts spline in). I agree it would be very helpful to know the Hewland tool's diameter. I have considered making a tool that has a flat spot in the exact center on diff shaft but that would require the use of a large inside micrometer. Feeler gauges would be easier. If .anyone here has access to the tool please post the measurement for us!
Thanks
Tom

[Lee Johnson]

I agree with "Bobsy SR6" & "Bob L.", it would be a great help if someone would measure & post the dimensions of the Hewland (or Webster?) jig(s).

Inquiring minds want to know!

Lee

[pooch776]

I just measured a MK-9 tool and it measures 119.70 mm or 4.7125 with my 6" digital caliper.

Cheers, Joe

[Bobsy SR 6]

Joe
Thanks, from all us poor do it your self racers
Tom

[Lee Johnson]

I got the real numbers from Hewland Engineering (UK) & the OK to share them! The engineering spec'd. pinion setting jig reference diameter dimensions are --

'Jig diameter mk9 = 4.711"/4.710"'

'Jig diameter FT = 4.611"/4.610"'

These are the diameters of the cylindrical reference surface used to check to the pinion nose "feeler gage" dimension scribed on individual pinion gears.

I hope this helps other DIYers!

Lee Johnson