Caterpillar — Generator Bearing Temperature - Test/Record
Maintenance
From a Caterpillar owner's manual covering: C3.3, C3.3 Rental Generator Set, C4.4, C4.4 Rental Generator Set, D4D1-Up, GLE1-Up, N3X1-UP, N4R1-Up, N4X1-Up, X3B1-UP, XYC1-Up, XYD1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar C3.3, Caterpillar C4.4
Before you start
- A generator set should never operate above the recommended set points
Procedure
- Measure bearing temperature after generator reaches normal operating temperature.
- RTDs are 100 ohm; EMCP 3.2/3.3 may be configured to ALARM or SHUTDOWN.
- An alarm is activated at 85 C (185 F).
- A shutdown occurs at 95 C (203 F).
- Bearing temperatures can also be recorded with an infrared thermometer.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Alarm at 85 C (185 F)
- Shutdown at 95 C (203 F)
Full service-parts list: Caterpillar C3.3 →, Caterpillar C4.4 →
Source: Caterpillar 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.