John Deere — Replace Front Crankshaft Oil Seal and Wear Sleeve
Repair & overhaul · Timing gear cover / crankshaft
From a John Deere service manual covering: 4045, 4045TF120, 6068, 6068 HF485, 6068HF158, 6068TF120, 6068TF250, 6068TFM50, 6068TFM76. Check it applies to your exact model before use.
Applies to: John Deere 4045, John Deere 4045TF120, John Deere 6068, John Deere 6068 HF485, John Deere 6068TF120, John Deere 6068TF250, John Deere 6068TFM50, John Deere 6068TFM76
Before you start
- Do not allow oil to contact coating on OD of seal
- The OD of crankshaft and wear sleeve must be cleaned and dried prior to installing seal
Procedure
- Remove poly-vee belts.
- Remove vibration damper/pulley from crankshaft.
- Center punch seal casing and drill 1/8 in. hole.
- Remove seal from timing gear cover using seal remover.
- Remove crankshaft wear sleeve with puller if equipped.
- Install new wear sleeve and front oil seal to proper depth per installation table.
- Install vibration damper/pulley and poly-vee belts.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- See Front Oil Seal/Wear Sleeve Installation Table
Full service-parts list: John Deere 4045 →, John Deere 6068 →, John Deere 6068 HF485 →, John Deere 6068TF250 →, John Deere 6068TFM50 →, John Deere 6068TFM76 →
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.