Massey Harris water pump

My parts MH30 has the grease fitting one but
needs a new bearing. You can have it cheap if your interested, but will require some muscle to get the old nuts off.

Got some info from a old manual you mite find of use: MH30 MH30GR is gas rowcrop model MH30GS is gas standard model MH30KR is row crop distillate model MH30KS is standard distillate model

(no reference to GP I can find)

for the continental 162 cu. (my tractor) bore is 3-7/16in , 4-3/8 stroke.

compression 6.23 - 1 for G models 5 - 1 for K models

rebore when clearance piston and bore is over .010

pistons in gasoline models are aluminum alloy and tin plated cast iron in the low grade models.

aluminum pistons correct clearance between piston and cylinder .002

cast iron pistons clearance .003

rings:

Ring Gap Clearances for all 4 rings .005 to .015 Side Clearances for all 4 rings .0015 to .0025

for new rings do not use a ring that is over .010 too large.

Hope this helps.