TOHATSU MFS 4D Service Manual page 35

Functional Limit
0.03 mm (0.0012 in)
59.07 mm (2.3256 in)
0.06 mm (0.0024 in)
0.06 mm (0.0024 in)
0.03 mm (0.0012 in)
58.90 mm (2.3189 in)
0.150 mm (0.00591 in)
Top ring 0.10 mm (0.0039 in)
Second ring 0.09 mm (0.0035 in)
Oil ring 0.21 mm (0.0083 in)
0.04 mm (0.00157 in)
15.97 mm (0.6287 in)
Top ring 0.50 mm (0.0197 in)
Second ring 0.70 mm (0.0276 in)
16.04 mm (0.63148 in)
0.080 mm (0.00315 in)
0.70 mm (0.0276 in)
29.92 mm (1.1780 in)
0.05 mm (0.0020 in)
5.45 mm (0.2146 in)
5.41 mm (0.2130 in)
5.54 mm (0.2181 in)
5.57 mm (0.2193 in)
0.070 mm (0.00276 in)
0.100 mm (0.00394 in)
1.8 mm (0.0709 in)
1.8 mm (0.0709 in)
33.2 mm (1.31 in)
28.07 mm (1.1051 in)
13.950 mm (0.5493 in)
0.03 mm (0.0012 in)
4st 4/5/6 2020
Action to be taken
Clean to remove.
Correct. (Use #240 to 400 waterproof sand paper and put on the surface
plate to correct. Use #600 to finish.)
Correct or replace if possible.
Clean to remove.
Clean to remove.
Replace if severely damaged on the piston sliding surface,
which cannot be repaired with sand paper of #400 to 600, or
if damaged over specified limit.
Correct. (Use #240 to 400 waterproof sand paper and put on the surface
plate to correct. Use #600 to finish.)
Replace if under lower limit.
Replace if over upper limit
Clean to remove.
Use waterproof sand paper of #400 to 600 to correct if possible, or replace.
Replace if over upper limit.
Replace oil ring when top ring or second ring is replaced.
Replace if over upper limit.
Replace if under lower limit.
Replace if the gap is over specified limit only if cylinder liner wear is less
than specified limit.
Replace oil ring when top ring or second ring is replaced.
Replace if over upper limit.
Replace if over upper limit.
Replace if over upper limit.
Replace if under lower limit.
Replace if over upper limit.
Adjust to specified range
Replace if under lower limit.
Replace if over upper limit.
Replace if over upper limit.
Correct or replace if over upper limit.
Replace if under lower limit.
Replace if under lower limit.
Replace if under lower limit.
Replace if over upper limit.
Check that no pressure leaks through rotating parts, sliding parts and
sealing parts.
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