Perkins 900 Series — To adjust the drive belt tension
Maintenance · Electrical equipment
For the Perkins 900 Series, from the Perkins service manual.
Applies to: Perkins 900 Series CP/CR engine
Procedure
- Loosen pivot fasteners of alternator and fasteners of adjustment link.
- Change position of alternator to give correct tension.
- Tighten adjustment link fasteners then pivot link fasteners.
- Check belt tension again.
Tools required
- Thumb pressure Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Deflection 10 mm (3/8 in) with 45 N (10 lbf) 4,5 kgf thumb pressure
Source: Perkins 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.