Cub Cadet 8404 - Manual (Page 77)

ENGINE SYSTEM
2-55 D615-W02 May-2003
615W2B6A
(E) Piston ring clearance
1. Clean the ring and the ring grooves, and install each
ring in its groove.
2. Measure the clearance between the ring and the
groove with a feeler gauge.
3. If the clearance exceeds the allowable limit, replace
the piston ring.
4. If the clearance still exceeds the allowable limit with
the new ring, replace the piston.
Piston
ring
clear-
ance Factory
spec.
Allowable
limit
Factory
spec.
Allowable
limit
0.04 ~ 0.08 mm
0.00157 ~ 0.00314 in.
0.15 mm
0.0059 in.
0.02 ~ 0.06 mm
0.00079 ~ 0.00236 in.
0.15 mm
0.0059 in.
2nd
ring
Oil ring
615W2B5A
(D)Piston ring end gap
1. Push down the ring into the cylinder to the lower
limit of ring travel in the assembled engine with a
piston.
2. Measure the ring gap with a feeler gauge.
3. If the gap exceed the allowable limit, replace the
piston ring.
Piston
ring
end
gap Factory
spec.
Allowable
limit
Factory
spec.
Allowable
limit
0.55 ~ 0.70 mm
0.0217 ~ 0.0276 in.
1.25 mm
0.0492 in.
0.25 ~ 0.40 mm
0.0098 ~ 0.0157 in.
1.25 mm
0.0492 in.
2nd
ring
Top
ring,
oil ring