John Deere 4045 / 6068 — Checking Tensioner Spring Tension
Adjustments · Belt tensioner
For the John Deere 4045 / 6068, from the John Deere operator's manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- A belt tension gauge will not give an accurate measure of belt tension with automatic spring tensioner.
Procedure
- Release tension on belt using a long handled 1/2 inch drive tool in square hole in tensioner arm.
- Remove belt from pulleys and inspect pulleys and bearings.
- Release tension on tension arm and remove drive tool.
- Put a mark on swing arm of tensioner.
- Measure 21 mm (0.83 in.) from the mark and put a second mark on tensioner mounting base.
- Install torque wrench aligned with centers of pulley and tensioner; rotate arm until marks align.
- Record torque wrench measurement and compare with specification; replace tensioner as required.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spring tension—torque 18-22 Amazon eBay FridayParts $45.30 N·m (13-16 Amazon eBay FridayParts $22.99 lb-ft)
- Mark distance 21 mm (0.83 in.)
Full service-parts list: John Deere 4045 →, John Deere 6068 →
Source: John Deere operator's 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.