SECTION 10 - ENGINE
10-44
Oil Ring
Standard Clearance: 0.008″ - 0 .016″ (0.20 mm
- 0.40 mm)
Allowable Limit: 0.039″ (1.0 mm)
Measure the clearance between the piston ring
groove and ring. If the clearance exceeds the
allowable limit, replace the ring.
#1 Ring
Standard Clearance: 0.0028″ - 0.0043″ (0.07
mm - 0.11 mm)
Allowable Limit: 0.0098″ (0.25 mm)
#2 Ring
Standard Clearance: 0.0016″ - 0.0032″ (0.04
mm - 0.08 mm)
Allowable Limit: 0.0098″ (0.25 mm)
Oil Ring
Standard Clearance: 0.0007″ - 0.002″ (0.02 mm
- 0.06 mm)
Allowable Limit: 0.0059″ (0.15 mm)
Oversize Piston Ring
If the cylinder is oversized, an oversized piston ring
set should be installed.
Mounting Position of the Piston Ring
Confirm the third piston ring is set, as shown here.
IMPORTANT: Fit the third ring as follows:
Put the expander, 1, into position in its groove.
Ensure the ends of the expander do not overlap.
Fit the upper side rail, 2, on top of the expander. Insert
the end of the side rail into the groove and hold it in
position with the thumb. Slide the rail into position
with the other thumb.
Fit the lower side rail, 3, in a similar manner.
Ensure the side rails are free to move in both
directions and the gaps of the expander and the side
rails are in the correct positions.
Standard OD: 1.1022″ - 1.1024″ (27.996 mm -
28.0 mm)
Allowable Limit: 1.1016″ min. (27.98 mm)
Piston Pin
Check the outside diameter of the piston pin. If it is
less than the allowable limit, replace.
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