I just ordered the Operation and Service manuals for the Massey 135 tractor from Jensales and they should be here in a few days.
Massey Ferguson 135 NARROW,DELUXE,SPECIAL,4 cyl gas engine,3 cyl Diesel engine-Operator's Manual
Massey Ferguson 135 G and D Massey Ferguson 135 Tractor Manual
If anyone is thinking about purchasing manuals from Jensales.com I strongly advise extreme caution. I posted about the outcome of my bad experience here:
My 1966 Massey 135 Tractor (Pics) - Page 12 - TractorByNet.com