Carrier CT2-29-TV Workshop Manual page 53

2.3.3 Piston and Connecting Rod (Continued)
2.3.3.d Piston Ring Gap
1. Insert the piston ring into the lower part of the cylinder
(the least worn section). Use the piston to square the
ring in the cylinder.
2. Measure the ring gap with a feeler gauge.
3. If the gap exceeds the allowable limit, replace the pis-
ton ring.
Specification
Top Ring
Allowable Limit
Specification
Second Ring
Allowable Limit
Specification
Oil Control Ring
Allowable Limit
2.3.3.e Piston Ring to Groove Clearance
1. Clean the rings and the ring grooves, and install each
ring in its groove.
2. Measure the clearance between the ring and its
groove with a feeler gauge.
3. If the clearance exceeds the allowable limit, replace
the ring.
4. If the clearance still exceeds the allowable limit after
replacing the ring, replace the piston.
Specification
Second Ring
Allowable Limit
Specification
Oil Control Ring
Allowable Limit
2.3.3.f Connecting Rod Alignment
Since the I.D. of the connecting rod small end
bushing is the basis of this procedure, check the
bushing for wear before proceeding.
1. Install the piston pin into the connecting rod.
2. Install the connecting rod on the connecting rod align-
ment tool.
3. Put a gauge over the piston pin and move it against
the face plate.
4. If the gauge does not fit squarely against the face
plate, measure the space between the pin of the
gauge and the face plate.
5. If the measurement exceeds the allowable limit, re-
place the connecting rod.
Connecting Rod
Allowable Limit
Alignment
2--29
Factory 0.15 to 0.30 mm
0.0059 to 0.0118 in.
1.20 mm / 0.0472 in.
Factory 0.30 to 0.45 mm
0.0118 to 0.0177 in.
1.20 mm / 0.0472 in.
Factory 0.15 to 0.30 mm
0.0059 to 0.0118 in.
1.20 mm / 0.0472 in.
Factory 0.090 to 0.120 mm
0.00354 to 0.00472 in.
0.15 mm / 0.0059 in.
Factory 0.040 to 0.080 mm
0.0016 to 0.0031 in.
0.15 mm / 0.0059 in.
NOTE
0.05 mm / 0.0020 in.
62--11161