Honda BF135A Manual page 453

• CRANKSHAFT AXIAL CLEARANCE
Install the dial indicator as shown. Measure the crankshaft axial
play by moving the crankshaft back and forth with a
screwdriver.
STANDARD
0.10 – 0.35 mm
(0.004 – 0.014 in)
If the measurement exceeds the service limit, check the thrust
washer and the cylinder block thrust surface. Replace the
thrust washer and recheck.
If the measurement still exceeds the service limit, replace the
crankshaft.
• THRUST METAL SIDE CLEARANCE
Measure the clearance between the No.4 main journal thrust
washer and the crankshaft.
STANDARD
0.10 – 0.35 mm
(0.004 – 0.014 in)
If the measurement exceeds the service limit, check the thrust
washer and the cylinder block thrust surface. Replace the
thrust washer and recheck.
If the measurement still exceeds the service limit, replace the
crankshaft.
• CRANKSHAFT RUNOUT
1) Install the No.1 and No.5 upper main bearings on the
cylinder block.
2) Install the crankshaft on the cylinder block.
3) Set the dial indicator on the crankshaft. Measure the
crankshaft runout by turning the crankshaft.
STANDARD
0.03 mm (0.001 in) Max.
4) If the measurement exceeds the service limit, replace the
crankshaft.
13-12
SERVICE LIMIT
0.45 mm
(0.018 in)
SERVICE LIMIT
0.45 mm
(0.018 in)
SERVICE LIMIT
0.04 mm (0.002 in)
[1]
CRANKSHAFT
[4]
NO.1 UPPER MAIN
BEARING
[2]
NO.5 UPPER
MAIN BEARING
[3]
CYLINDER
BLOCK