John Deere — Check Crankshaft End Play
Testing & diagnosis · Crankshaft thrust bearings
From a John Deere service manual covering: 4039, 4045, 6059, 6068. Check it applies to your exact model before use.
Applies to: John Deere 4039, John Deere 4045, John Deere 6059, John Deere 6068
Before you start
- Do not apply too much pressure with the bar, as this could damage bearings.
Procedure
- Position dial indicator on contact face of flywheel, front crankshaft nose, damper or front pulley assembly.
- Using a prybar, gently push crankshaft as far to rear of engine as possible.
- Zero the dial indicator.
- Gently pry the crankshaft as far forward as possible.
- Note indicator reading; if end play is not within specifications, install new thrust bearing.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Two-piece thrust bearing: 0.05—0.25 mm (0.002—0.010 in.); wear limit 0.50 mm (0.020 in.)
- Six-piece thrust bearing: 0.025—0.35 mm (0.001—0.014 in.); wear limit 0.50 mm (0.020 in.)
Full service-parts list: John Deere 4039 →, John Deere 4045 →, John Deere 6068 →
Source: John Deere 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.