Piston And Piston Ring - Perkins 403C-11 Workshop Manual

4

Piston and piston ring

To inspect
Piston
If the outer surface of the piston is damaged (cracked, scored, burning etc) renew.
Piston skirt
Check the larger diameter of the piston skirt (10 mm from bottom).
Check the inside diameter (thrust direction) of the cylinder. Calculate the clearance between the cylinder and
the piston. If the clearance is more than the service limit, or piston diameter is less than service limit, renew
the piston
Engine
403C-11 76,932 - 76,947 mm (3.02880 - 3.02940 in) 76,7 mm (3.020 in)
403C-15
404C-22 83,948 - 83,963 mm (3.30503 - 3.30562 in) 83,7 mm (3.295 in)
404C-22T
Engine Clearance between piston and cylinder
403C-11 0,0525 - 0,0865 mm (0.00210 - 0.00340 in) 0,25 mm (0.010 in)
403C-15
404C-22 0,0380 - 0,0720 mm (0.00150 - 0.00283 in) 0,25 mm (0.010 in)
404C-22T
40
Cylinder diameter
Workshop Manual, TPD 1458E, issue 3 - Perkins Confidential: Green
Service limit
Service limit
400 Series
Operation 4-8