ARB DIFF LOCK

I picked up my heavy duty diff cover today.
(do red covers make 101 landys go better ? )
https://www.aulro.com/afvb/images/im...012/04/789.jpg

You only bought it because it was red :D

Ring gear is now correctly fitted to locker at 100 ftbs torque on bolts and loctite.
Two new bearings fitted , one purchased by myself and one supplied by ARB in the kit.
The cone on the ARB bearing is the same as the one that came out, but the cup supplied is narrower than the landrover factory item.
I found a piece of pipe the correct size to push on the bearing cones.
The ARB book recommends a press is needed, but I found they tapped on without too much trouble using my piece of pipe.
https://www.aulro.com/afvb/images/im...09/06/1320.jpg
https://www.aulro.com/afvb/images/im...09/06/1321.jpg

this pic is with the plate with the air supply fitted and it also encloses the O rings when fitted.
Everything is ready to try in the diff housing .
I will try that tomorrow in the day light
https://www.aulro.com/afvb/images/im...09/06/1319.jpg

The locker is fitted in the diff housing with one bearing cap fitted ( finger tight bollts) and the locker pushed hard over to the crown wheel side bearing ,
crown wheel backlash checked.
https://www.aulro.com/afvb/images/im...09/06/1289.jpg

Feeler guage is checking the gap between the end of the locker and the housing so bearing preload can be worked out.
The torque on the crown wheel bolts is 100ft lbs as is the cap bolts for the centre bearings.
The preload for the centre bearings is 5 thou.
So what ever you find in gap with the feeler guage, add 5 thou for the shim pack for the non crown wheel side.
https://www.aulro.com/afvb/images/im...09/06/1288.jpg

I got my crownwheel backlash correct first go thanks to the extra earlier measuring efforts.
Next measure from the edge of the housing to the centre of the copper pipe for the locker and then triple check your work.
https://www.aulro.com/afvb/images/im...09/06/1287.jpg

https://www.aulro.com/afvb/images/im...09/06/1283.jpg
Remove the locker and then fit the non crown whell side bearing cap and centre pop a mark on it the same as the previous measurement for the copper pipe.
Triple check your measurements.




https://www.aulro.com/afvb/images/im...09/06/1284.jpg



https://www.aulro.com/afvb/images/im...09/06/1285.jpg
https://www.aulro.com/afvb/images/im...09/06/1286.jpg

For interest sake the above measurement was 13mm .
The next step is to drill a 1/4 hole through the bearing cap at the centre popped and measured triple checked point.
https://www.aulro.com/afvb/images/im...09/06/1280.jpg
https://www.aulro.com/afvb/images/im...09/06/1281.jpg
https://www.aulro.com/afvb/images/im...09/06/1282.jpg
Chamfer the hole.

The next step is to drill and tap the air supply hole through the diff housing.
I purchased a 1/4 gas tapered thread tap.
I found a perfect spot on top,of the diff housing for the hole between the the two cast in ridges at the top of the diff .
A 7/16 hole is drilled and then tapped.
I had to use a 90 degree angle drill to do this as there was
little clearence between the top of the diff housing and the engine oil cooler hoses.
https://www.aulro.com/afvb/images/im...09/06/1276.jpg

https://www.aulro.com/afvb/images/im...09/06/1277.jpg
I rigged up part of the card board box the locker came in to catch the iron chips.https://www.aulro.com/afvb/images/im...09/06/1278.jpghttps://www.aulro.com/afvb/images/im...09/06/1279.jpg