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| Illustration 1 | g00528721 |
Air starting system (1) Relay Valve (2) Air Starter (3) Air Tank (4) Solenoid Valve | |
When the operator turns the keyswitch to the START position the power train ECM activates solenoid valve (4) . When solenoid valve (4) is activated, air enters air starter (2) from air tank (3) . The air that is entering the air starter forces a drive gear into the flywheel. Air then travels from air starter (2) to relay valve (1) . The air pressure from the air starter activates relay valve (1) . Relay valve (1) opens a passage from air tank (3) to air starter (2) .
The transmission must be in the NEUTRAL position before the keyswitch is turned to the START position. If the transmission is not in neutral the power train electronic control module (ECM) will not allow the engine to start. Once the transmission is placed in neutral, the power train ECM signals the engine to start.
If the machine is equipped with prelube the engine control will perform a series of checks on the engine. The engine control checks the following criteria: engine temperature, last engine operation and engine oil pressure. The engine control will check the criteria of the prelube. Then, the engine control will cycle the prelube system or the engine control will signal the power train ECM to start the engine.
Note: The operator can bypass the prelube system. After the keyswitch is turned to the START position return the keyswitch to the ON position. Then turn the key switch back to the START position.
For additional information on the air starter, refer to the Service Manual, RENR2211.