Perkins — How to adjust the fan belts

Adjustments

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

1. Remove the fan guards.
2. Loosen the 6 nuts (B3) and loosen the lock nut (B2).
3. Rotate the adjusting screw (B1) clockwise to increase tension, anti-clockwise to loosen tension.
4. When all belts are at the correct tension, tighten the 6 nuts (B3) to 85 Nm (62.7 lbf ft) 8,6 kgf m and tighten the locking nut (B2).
5. Check that the fan belt tension is correct on each belt.
6. Fit the fan guards.
7. 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.

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