Pixs are 300 series but I am pretty sure the 511B is the same and the part nrs match.
1. View from the seat looking down on the torque tube cover.
2. Filter element is under that spring loaded cover. Original edge wound element is cleanable. If not servable or has been changed to a disposable element, Wix 51518 (NAPA 1518) disposable element is a suitable substitute
3. The cam (worm gear) is the same part in 311, 311B, 411B, 511B, & 611B. These are left hand cams. The covers are slightly different but the gasket is the same p/n so it will bolt up, donít know if it would work ok. The nr 3 pix is 300 series but applies up through 600B, The general purpose tractors have a L.H. cam and the utility tractors have a R.H. cam. The wrong cam will have the wheels turn opposite the steering wheel.
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