Hewland/Webster Ring & Pinion Set Up

[Bob Coury]

I have a Webster" Mk 9" and have a few pinion bearing questions:

1. I know I am to look on the pinion gear to find the setting distance from the set-up jig and the nose of the pinion gear. but the only numbers on there are "81730 PDP". I assume PDP is related to Pich Diameter. But those numbers seem to not relate to any distance between a setting jig and the pinion. Any tips here?

2. Is it normal for the pinion to have about .030 forward-aft play in the bearing before you have all the gears on and the pinion nut on the rear tight?

3. I may make my own pinion depth setting jig using a sideplate since I have the stub axle out. Does anyone have the diameter of the Hewland gage I would be neasuring from so I can make an insert to fit into the sideplate?

Thanks guys,
BC

[Steve Demeter]

Bob,
I brought from a guy named Tom Pomeroy his complete pinion depth set up, including dummy side plates and the $200 wrench needed for the pinion nut.

I know that it has all the stuff to set pinion depth as I watched him do it on my old gearbox.

I now have a car with a Stasffs and do not need the tools.

I would be happy to sell it for $400 and you pay the ship[ping.

I can take and post some pics in a couple of days (it is minus 3 right now and either me or the camera would freeze).

If it was me, I owuld have someone that knows what they are doing do it unless you are very confident in your abilities.

I was not in mine

Steve

[WRD]

Bob

The webster Ring and Pinions usually have an etched number on them that is the setting distance, it is sometimes very faint due to the finishing processes that they use. Also, it is worth noting that on the Webster this setting number does not take a jig into account but is actually the distance from the centre differential bore to the head of the pinion so once the pinion is installed you need to measure this distance. With this in mind you could make your jig any diameter that you please, as long as you know your jig diameter and the distance between it and the pinion head you can check your settings realtively easily.

For information, the Hewland jig diameter is 4.71" as stated on the information cards that come with the Hewland R+P's, so this is probably a good starting point as you can use it in the future should you install a Hewland R+P.

With the Hewland not having a nut like the Staffs on the pinion bearing it can asometimes be seen to float around when the gears are not installed, it is very important that you install all hubs and the rear nut to preload the pinion bearing before making any pinion depth measurements

I hope this helps but if you have any questions whatsoever feel free to give me a call on 858 220 0927.

Lee Williams

Williams Racing Developments
www.willrace.com

[Bob Coury]

Steve-

I remember Tom. He use to run FV and SV years ago. Anyway- I have spent gobs of cash and may have to hold off on tooling. I may just measure from a ref point on the case.


Lee-

Thanks for the tips. After I wrote the posting I realised that it is measured off the axle CL and I could use any diameter. I just can't find the markings, even with magnifiers.



To all-I may investigate just finding a used Mk9.

[JIM McQUAIG]

rick capone,in riviera beach, used to have a lot of hewland tools and goodness knows what else. he also had a lot of knowledge of gearboxes. he is close enough for you to visit or at least call. give me a shout if you don't know how to reach him.

[Bob Coury]

Jim:

I had contacted Rick over the weekend-all his tools are gone.

Thanks anyway,
Bob