Caterpillar 3516C / 3516C Generator Set — Generator - Dry (Controlled Current Method)
Maintenance · Generator windings
For the Caterpillar 3516C / 3516C Generator Set, from the Caterpillar operator's manual.
Applies to: Caterpillar 3516C, Caterpillar 3516C engine
Before you start
- Do not operate generator if windings are wet
- Only qualified personnel should perform troubleshooting and repair
Procedure
- Make external power source per Illustration 91.
- Disconnect F1+ and F2- from voltage regulator; connect generator output leads T0, T1, T2, T3 together; install clamp-on ammeter on T1.
- Adjust rheostat to maximum resistance; connect external power source to F1+ and F2-.
- Start generator set; run at idle speed.
- Monitor phase current; gradually increase engine rpm with EMCP 3 control panel.
- Slowly turn rheostat until rated phase current is reached.
- Stop hourly; check insulation resistance; repeat until acceptable.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Do not exceed rated phase current on generator nameplate
- Winding temperature must not exceed 85 °C (185.0 °F)
Full service-parts list: Caterpillar 3516C →, Caterpillar 3516C engine →
Source: Caterpillar 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.