Working on my '84 Le Tour Luxe (gratuitous beauty shot)
The MounTech rear derailleur was coated in 30 years of greasy grime so I decided to disassemble the bottom end to clean and lube it.
I looked at the Disraeli Gears page about this derailleur where they describe it as being overly complicated and prone to failure. Fortunately this example is in good shape, but the wheels weren't rolling smoothly.
Time to take it apart.
I took photos so I could get the pieces back together correctly. I've winged before and had bad results, so this time I wasn't taking any chances.