Sorry I used the term bearing instead of bushing, but if you need pictures of disassembled instruments I have plenty here. I have Mitsu instruments dating back to the early 70s and routinely find them needing lubrication.
I also replace the faces with a 180 MPH display and recalibrate them for accuracy through the new range. I know these units better than anyone who just says replace it.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.