Remove the nut(A) and disconnect the lead wire(B) from the magnetic switch terminal(C).
Remove the 2 bolts(A) and pull out the yoke assembly(B) with the armature(C) from the front bracket(D).
Using a screwdriver, hold the spring tank back and disconnect the brush(A) from the brush holder(B).
Disconnect the 2 brushed and remove the brush holder.
Check that the positive(+) lead wires are not grounded.
Remove the 3 screws(A) and disconnect the housing rear cover(B) and packing(C).
Remove the magnetic switch(A) and spring coil(B).
Remove the 2 screws(A) and disconnect the clutch sub assembly(B), idle gear(C), idle gear bearing(D) and drive gear(E) from the housing(F).
Using a magnetic finger(A), remove the steel ball(B) from the clutch shaft hole.
Reassembly is the reverse of disassembly.
When installing the yoke assembly(A), use a new O-ring(B) and align the mark(C) on the housing to the mark(D) range of the brush holder.