Put the crankshaft on V-blocks. Install a dial indicator on the center journal [Figure 70-100-73].
Turn the crankshaft at a slow rate.
If the misalignment exceeds the allowable limit, replace the crankshaft.
Measure the crankpin O.D.[Figure 70-100-75].
Calculate the oil clearance.
Check the wear on the crankshaft sleeve [Figure 70-100-76].
If the wear exceeds the allowable limit or the seal leaks oil, replace the sleeve.
The special tool set (Kubota Code Number: 07916-32091) will be needed to replace the crankshaft sleeve.
Remove the sleeve.
Install the sleeve guide (Item 1) and stop (Item 2) [Figure 70-100-77].
Heat the sleeve to about 300ยฐF (150ยฐC). install the sleeve on the crankshaft using the special driver tool (Item 3) [Figure 70-100-77].
Measure the I.D. of the No.1 crankshaft bearing [Figure 70-100-78].
Measure the O.D. of the crankshaft journal [Figure 70-100-79].
Calculate the clearance.
If the clearance exceeds the allowable limit, replace the crankshaft bearing.
To remove the front bearing make the driver tool as shown in figure [Figure 70-100-80].
To install the front bearing make the driver tool as shown in [Figure 70-100-81]
Remove the front bearing (Item 1) [Figure 70-100-82] with the special removal tool.
Installation: Clean the new bearing and bore, apply oil on them. Install the new bearing with the installation driver tool [Figure 70-100-82].
Clean the crankshaft journal and bearing. Put a strip of press gauge on the center journal.
Install the main bearing case halves and tighten the bolts.
Remove the bearing case halves.
Measure the flattened press gauge [Figure 70-100-83].
If the clearance exceeds the allowable limit, replace the crankshaft bearing.
