DRIVE BELT TENSION
Using a belt tension gauge, measure drive belt tension midway on longest belt run. See GENERATOR DRIVE BELT TENSION table. Adjust drive belt as necessary.
| Application | Lbs. (Kg.) | |
|---|---|---|
| Optima & Magentis (Canadian) | ||
| New Belt | 121-143 (55-65) | |
| Used Belt | 77-99 (35-45) | |
| Rio, Sephia, Spectra & Sportage | ||
| New Belt | 86-103 (39-47) | |
| Used Belt | 68-86 (31-39) | |
GENERATOR DRIVE BELT TENSION
BEARING
Check for abnormal noise, looseness and insufficient lubrication. Replace bearing if necessary.
BRUSH
Note. Brush specification for Optima & Magentis (Canadian) and Rio is not available from manufacturer.
On Sephia, Spectra and Sportage, new brush length is .85" (21.5 mm). Minimum brush length is .32" (8.0 mm). If brushes are worn beyond limit, replace them.
RECTIFIER
Using ohmmeter, check for continuity between each diode. See DIODE CONTINUITY table. (Scheme 8) If continuity is not as specified, replace rectifier.
| Negative Terminal | Positive Terminal | Continuity |
|---|---|---|
| E | PN, P1, P2 & P3 | No |
| B | PN, P1, P2 & P3 | Yes |
| T | PN, P1, P2 & P3 | Yes |
| PN, P1, P2 & P3 | E | Yes |
| PN, P1, P2 & P3 | B | No |
| PN, P2 & P3 | T | No |
| PN | T | Yes |
DIODE CONTINUITY
Scheme 8
ROTOR
Using ohmmeter, measure resistance between slip rings. If resistance is not 3.5-4.5 ohms, replace rotor. Check for continuity between slip ring and core. If continuity exists, replace rotor. If slip ring surface is rough, correct using smooth lathe or fine sandpaper.
STATOR
Using ohmmeter, check continuity between stator coil leads. If continuity does not exist, replace stator. Check continuity between stator coil leads and core. If continuity exists, replace stator.