I would be unsure about that one,, a W-3 and a 420B are not the same enough machine to be in the same service manual,, look for a 400B one also any Case CE/Construction can order you the operators manual for the 420B it has most any hyd specs you will need and the Case 400B service manual will give you any spec for the tractor unit, the ops book part number is in one of the pics
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Today's Featured Article - Oliver 550 Clutch Overhaul Tips - by Greg Sheppard. I got my 1964 Oliver Model 550 (serial 141-139-519) second-hand and used it for several years before the clutch began to slip. After taking up the pedal linkage several times I saw it was going to take more than that. The engine had been leaking oil at the rear seal and I suspected
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