Perkins 1106 — Alternator - Test
Testing & diagnosis
For the Perkins 1106, from the Perkins service manual.
Applies to: Perkins 1106
Procedure
- Put multimeter positive lead on 'Bat' terminal, negative on ground; put ammeter around positive output wire.
- Turn off accessories and fuel; crank engine 30 seconds; wait two minutes.
- Start engine and run at full throttle.
- Check output current; initial charging current should equal minimum full load current.
- After ten minutes at full throttle, output voltage should be 14.0 ± 0.5 V for 12 V system or 28.0 ± 1 V for 24 V system.
- After ten minutes, charging current should decrease to approximately 10 A.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Perkins 1106 →
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.