Brake Systems: Modulators
NOTE:
Many modulators can only be replaced as complete assemblies. Whenever possible, replace the failed component part. If replacement of the failed part is not
| Condition | Code | Procedure |
|---|---|---|
| possible, then replace the modulator assembly. | ||
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware not functioning | A | Require repair or replacement of hardware |
| Connector (Weatherpack type) leaking | A | Require repair or replacement |
| Connector broken | A | Require repair or replacement |
| Connector melted | A | Require replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Connector missing | C | Require replacement |
| Disabled | A | Require repair or replacement |
| Electrical failure | A | Require repair or replacement |
| External leak | A | Require repair or replacement |
| Housing cracked | A | Require repair or replacement |
| Inoperative | A | Require repair or replacement |
|
NOTE:
Inoperative includes intermittent operation.
|
||
| Internal leak | A | Require repair or replacement |
| Missing | C | Require replacement |
| Terminal burned, affecting performance | A | Require repair or replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Terminal burned, not affecting performance | 2 | Suggest repair or replacement |
| Terminal corroded, affecting performance | A | Require repair or replacement |
| Terminal corroded, not affecting performance | 2 | Suggest repair or replacement |
| Terminal loose, affecting performance | B | Require repair or replacement |
| Terminal loose, not affecting performance | 1 | Suggest repair or replacement |
| Threads damaged | A | Require repair or replacement |
| Threads stripped (threads missing) | A | Require replacement |
| Valve stuck | A | Require repair or replacement |
| Wire lead burned | A | Require repair or replacement |
| Wire lead conductors exposed | B | Require repair or replacement |
| Wire lead open | A | Require repair or replacement |
| Wire lead shorted | A | Require repair or replacement |