Perkins 404C-22T - Page 48

4
38 Workshop Manual, TPD 1458E, issue 3 - Perkins Confidential: Green
400 Series
To measure the piston ring gap Operation 4-6
If the piston ring is worn or damaged, renew.
Piston ring gap
Clean the carbon from the top of the cylinder bore.
Insert the ring into the cylinder at right angles to the cylinder block and measure the gap with a feeler gauge.
If the gap is greater than the service limit, renew the piston ring.
Engine Ring number Standard Service limit
403C11
Number 1 ring 0,15 - 0,27 mm (0.0059 - 0.0106 in) 1,0 mm (0.039 in)
Number 2 ring 0,12 - 0,24 mm (0.0047 - 0.0094 in) 1,0 mm (0.039 in)
Oil control ring 0,20 - 0,35 mm (0.0079 - 0.0138 in) 1,0 mm (0.039 in)
403C-15
404C-22
404C-22T
Number 1 ring 0,20 - 0,35 mm (0.0079 - 0.0138 in) 1,0 mm (0.039 in)
Number 2 ring 0,20 - 0,40 mm (0.0079 - 0.0158 in) 1,0 mm (0.039 in)
Oil control ring 0,20 - 0,40 mm (0.0079 - 0.0158 in) 1,0 mm (0.039 in)
H1059
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