Kubota — Checking Crankshaft Side Clearance
Testing & diagnosis · Crankshaft thrust bearings
From a Kubota service manual covering: Hurth HBW 100, Hurth HBW 125, Hurth HBW 150, Hurth HBW 250, Hurth HBW 35, Hurth HBW 50, M-25XPB, M-35B, M-40B. Check it applies to your exact model before use.
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Procedure
- Set a dial indicator with its tip on the end of the crankshaft.
- Measure side clearance by moving the crankshaft front and rear.
- If the measurement exceeds the limit, replace the thrust bearings.
- If a same-size thrust bearing is inadequate, use an oversize thrust bearing.
Tools required
- Dial indicator Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Standard: 0.0059 - 0.0122 in. (0.15 - 0.31 mm)
- Limit: 0.0197 in. (0.50 mm)
Source: Kubota service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.