Optional Warning and Indicator Lamps
A description of some commonly used optional warning and indicator lamps are listed below.
Air Filter Warning
The air filter warning indicator (AIR FILTER legend) illuminates when the air cleaner filter element is clogged, restricting the intake air flow. See Table..
If the air filter indicator light is steadily illuminated for any period of time, check the air intake restriction gauge. If needed, replace the air filter, and reset the air intake restriction gauge.
Table 1, Air Intake Maximum Restriction Values (inH 2O)
|
Air Intake Maximum Restriction Values (inH 2O) |
||
|---|---|---|
|
Engine |
Pre-EPA07 Engines |
EPA07 and Newer Engines |
|
Cummins |
25 |
25 |
|
Mercedes-Benz |
22 |
22 |
Table 1, Air Intake Maximum Restriction Values (inH 2O)
Important: Never attempt to clean the air filter.
Alternator No Charge Indicator
The alternator no charge indicator lamp (NO CHARGE legend) illuminates when the alternator is not charging properly.
Check Transmission Warning (diesel engine only)
Note: Although it appears in the row of optional indicators, the check transmission indicator is a standard indicator.
The check transmission indicator, shown in Fig., notifies the driver of three things. Any of the following items could be the cause for activating the indicator:
-
the oil needs to be changed
-
the filter(s) need to be changed
-
clutch maintenance is required
Fig. 1, Check Transmission Indicator
When the check transmission indicator illuminates, refer to the Allison Operator's Manual or contact customer support at Allison Transmission to determine the specific cause activating the indicator.