TOHATSU MD 70-90C2 Service Manual page 37

unctional Limit
Scratches or deflection of 0.03mm (0.0012 in)
Scratches or deflection of 0.03 mm (0.0012 in)
¿86.08 mm (3.3890 in)
When the cylinder liner cannot be repaired using #400 to #600
grit sandpaper due to deep scratching or scuffing to the sliding
surface in contact with the piston or when the difference
between the minimum and maximum points of wear in the liner
bore is 0.06 mm (0.0024 in) or more.
¿85.79 mm (¿3.3776 in)
0.30 mm (0.0118 in)
0.10 mm (0.0039 in)
¿23.03 mm (0.9067 in)
0.040 mm (0.0016 in)
0.80 mm (0.0315 in)
0.80 mm (0.0315 in)
0.80 mm (0.0315 in)
¿22.97 mm (0.9045 in)
0.05 mm (0.0020 in)
Abnormally wear or damage
2 mm (0.08 in)
When the difference in standard value
When the end reed valve fails to close
Excessive wear on valve seat
Valve is damaged
When the difference in compression between cylinders exceeds
0.1 MPa (14.9 psi) [1.05 kg/cm ]
2
When abnormally higher than standard value
TLDI 75/90C2 2010
Action To Be Taken
lean and remove build up.
Repair by polishing the surface plate, starting with #240 to #400 grit
sandpaper and finishing with #600 grit sandpaper.
Replace if over specified limit.
Repair or replace depending on the extent of damage.
lean and remove obstruction.
Repair by polishing the surface plate, starting with #240 to #400 grit
sandpaper and finishing with #600 grit sandpaper.
Replace if over specified limit.
Bore and hone to 0.5 oversize piston diameter. heck ports and grind if
necessary. (Use 0.5 oversize pistons and piston rings.)
Replace if over specified limit.
lean and remove build up.
Replace if excessively worn.
Replace if less than specified limit.
Replace if over specified limit.
lean and remove build up.
Repair or replace depending on the extent of damage.
(Repair using #400 to #600 grit sandpaper.)
Replace if over specified limit.
Replace if over specified limit.
Replace if less than specified limit.
Replace with new crankshaft assembly.
Replace if over specified limit.
Replace with new part.
Replace if over specified limit.
Replace with new part.
Replace entire valve assembly.
Remove carbon from piston crown and cylinder head.
Bore and hone to 0.5 mm (0.020 in) oversize piston dameter.
heck ports and grind if necessary.
(Use 0.5 oversize pistons and piston rings.)
2
2-9