Perkins — How to adjust the alternator drive belt
Adjustments · Alternator belt
From a Perkins owner's manual covering: 4000 Series, 4006-23 TAG1A, 4006-23 TAG2A, 4006-23 TAG3A. Check it applies to your exact model before use.
Applies to: Perkins 4006-23 TAG1A, Perkins 4006-23 TAG2A, Perkins 4006-23 TAG3A
Procedure
- Remove the guard assembly from the alternator.
- Loosen the pivot bolt (B1) and loosen the link adjuster bolts (B3).
- Adjust the alternator belt to the required tension.
- Tighten the bolts (B1) and (B2) securely.
- Fit the guard and tighten all the bolts securely.
- Connect the power supply to the starter motor.
Source: Perkins owner'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.