Thread: BANG!!

Never thought of using fencing wire for a fuse...I followed my FIA who used foil from ciggie packets. ..still one in place in the farm truck rodeo...25 years later😚

Btw...the cross shafts used to be located with a solid machined pin which was secured with a chiseled crimp. So the roll pin would cut labour costs by eliminating the second punch/chisel step. Even earlier stuff had a threaded locating pin again chiseled/punched to keep it from unthreading,

Yes you beat me.
The earlier diffs had a screw in pin.
It is not a "shear pin" it is just to hold the cross pins in place, however as soon as you spin a wheel excessively the sun gears weld themselves to the cross pins and the cross pins snap and then fall out and hit the case.
It shouldn't happen so much with traction control stopping the wheel spinning but there you go.
We used to have a bloke in the Range Rover club who would do a rear diff on almost every trip in a D1. He couldn't be told not to spin a rear wheel. I also recall LR instituted a cost saving measure by replacing fully machined sun gears with compressed powder ones in D1. I don't know about D2.

Regards Philip A

Agree fully on your description of the reasoning behind roll pins.

Unfortunately I have seen 3" nails used to stop unwanted power outages from blown 15A fuses.

Originally Posted by Wahgilad

Agree fully on your description of the reasoning behind roll pins.

Unfortunately I have seen 3" nails used to stop unwanted power outages from blown 15A fuses.

Last time I did that, it blew both of my eyebrows off!

Originally Posted by V8Ian

Shear pins are designed as a cheap, weak link, to save damage to more expensive bits in the chain. Think of them as a mechanical fuse.
Would you replace a 15 amp fuse with a length of number 8 fencing wire?

In ship repair I saw copper boat builders nails used by the boilies to replace fuses that annoyingly kept blowing when using max amps and long runs of lead. Electrode stubs were also quite handy.

The most spectacularly unsuitable one I have see in a vehicle was a .22LR.

Originally Posted by JDNSW

The most spectacularly unsuitable one I have see in a vehicle was a .22LR.

Just the case? Or the whole dang thing?!?

Here’s a handy guide for fuse sizing.