1-S51
L2800, L3400, WSM
ENGINE
Piston Ring Gap
1. Insert the piston ring into the lower part of the liner (the least worn
out part) with the piston.
2. Measure the ring gap with a feeler gauge.
3. If the gap exceeds the allowable limit, replace the ring.
W1032246
Clearance between Piston Ring and Groove
1. Remove carbon from the ring grooves.
2. Measure the clearance between the ring and the groove with a
feeler gauge or depth gauge.
3. If the clearance exceeds the allowable limit, replace the ring
since compression leak and oil shortage result.
4. If the clearance still exceeds the allowable limit after replacing the
ring, replace the piston.
W1032489
Top ring
Factory
spec.
D1403-M
0.20 to 0.35 mm
0.0079 to 0.0138 in.
D1703-M
0.20 to 0.40 mm
0.0079 to 0.0157 in.
Allowable limit
1.25 mm
0.0492 in.
Second ring
Factory spec.
0.30 to 0.45 mm
0.0118 to 0.0179 in.
Allowable limit
1.25 mm
0.0492 in.
Oil ring
Factory spec.
0.25 to 0.45 mm
0.0098 to 0.0177 in.
Allowable limit
1.25 mm
0.0492 in.
Second ring
Factory
spec.
D1403-M
0.093 to 0.128 mm
0.0037 to 0.0050 in.
D1703-M
0.093 to 0.128 mm
0.0037 to 0.0050 in.
Allowable limit
0.2 mm
0.0079 in.
Oil ring
Factory spec.
0.020 to 0.060 mm
0.0008 to 0.0021 in.
Allowable limit
0.15 mm
0.0059 in.
KiSC issued 08, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland