TOHATSU MFS 25D Service Manual page 49

Functional Limit
• Difference of 0.06 mm (0.0024 in) between the most worn out
area and least worn out area of the liner inner diameter
(Roundness 0.06)
• Taper limit 0.08 mm (0.0031 in)
Measurement position: From the cylinder mating surface
(1) 6 mm (0.2362 in) (2) 38 mm (1.4961 in)
(3) 76 mm (2.9921in)
Distortion: 0.1 mm (0.0039 in)
or when the sealing performance may be affected.
0.060 mm (0.0024 in)
0.60 mm (0.0236 in)
0.03 mm (0.0012 in)
0.060 mm (0.0024 in)
0.60 mm (0.0236 in)
IN: 23.5 mm (0.9252 in)
EX: 23.5 mm (0.9252 in)
Pulley Side 17.91 mm (0.7051 in)
#1 - #2 32.85 mm (1.2933 in)
Oil Pump Side 15.91 mm (0.6264 in)
0.05 mm (0.002 in)
Wear, Damage, Elongation
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Parts that are worn out or damaged
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Parts that are worn out or damaged
Parts that have deteriorated and parts where fuel has gotten inside
4st 25/30 2022
Action To Be Taken
Replace if more than specified limit
Replace if the difference between the most worn out area and least
worn out area of the liner inner diameter is above the specified
value.
Replace if there are deep scratches etc. on the sliding surface
with the piston, which cannot be repaired with #400 to 600 water-
resistant paper.
Resurface by laying a #240 - 400 waterproof abrasive paper on the
surface plate. Use #600 for finish.
Clean to remove
Replace if more than specified limit
Replace if more than specified limit
Replace if more than specified limit
Replace if more than specified limit
Replace if less than specified limit
Replace if less than specified limit
Replace if more than specified limit
Replace if more than specified limit
Replace if less than specified limit
Replace if less than specified limit
Replace if less than specified limit
Replace if less than specified limit
Replace if less than specified limit
Replace if more than specified limit
Replace depending on the condition.
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Replace with new part
Replace if out of standard value
Replace with new part
Replace with new part
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