Crankshaft Disassemby, Reassembly, And Truing

[190mech]

Measuring the outside width of the crank wheels;


Crank wheels marked with a sharpy,then scribed with a steel square for future alignment on assembly..
This wont work on this build as we are cutting 2.5mm from the OD of the crank wheels;


Crank disassembly rig,large steel pipe,notched.1/4" notched steel top plate,steel shim plates to keep crank square while pressing;


Pushed apart;


Pushing pin from other half;

[190mech]

Crank webs turned down to 74mm;




Super hard metal!These China cranks are GOOD metal!!

Squashing in the crank pin,gotta start it,then remove it and check it with a square,then adjust it back and forth to get it square enough to press it all the way in..


After the rod kit is lubed and loaded on the pin,the other wheel is started,checked with a square and bumped with a brass hammer while still in the press to square it up,then its pushed till it touches the feeler gauge;


OOPS!After taking the crank out of the press and checking it with a straight edge,its off a bit..Two licks with the brass hammer got it close enough to put it between centers;


Now for the long task of bumping it around with hammers and chisels to get it true!