PTO - Preset Mode (Factory Default Setting): Notes
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The PTO preset mode is used for stationary applications. PTO will remain engaged while mobile in the preset mode however PTO Preset 1 and PTO Preset 2 speed controls will be inoperative. The engine RPM will also return to normal. This mode provides a default standby speed of 800 or 850 RPM depending on the engine and transmission combination. This mode also provides 2 default PTO control speeds: PTO Preset 1 of 1250 RPM and PTO Preset 2 of 1700 RPM. Please note that the standby speed is not to be used as a PTO control speed. Vehicles not equipped with cruise control will not have the resume speed capability.
Power Take-Off (PTO) Description and Operation
| Programmable Parameters | Factory Setting (RPM) | Minimum Value (RPM) | Maximum Value (RPM) |
|---|---|---|---|
| PTO Max Engine Speed | 2200 | L18-2100 LB7-950 |
L18-4200 LB7-3100 |
| PTO Standby RPM | Auto/Manual L18-800/850 LB7-800/800 |
Normal engine idle will override if higher than requested PTO base idle | 1300 |
| PTO Preset 1 | 1250 | PTO Preset 1 cannot be set below PTO Standby speed | PTO Max Engine Speed |
| PTO Preset 2 | 1700 | PTO Preset 1 | PTO Max Engine Speed |
| PTO Max Engage Speed | 1000 | 950 | PTO Max Engine Speed |
PTO Preset Mode Function Chart
| Present PTO State | Pressing | Resulting PTO State |
|---|---|---|
| DEFINITION: This chart shows how to toggle between the 2 PTO speeds through the SET and RES switches. | ||
| PTO Standby Speed | SET | PTO Preset 1 |
| PTO Standby Speed | RES | PTO Preset 2 |
| PTO Preset 1 | SET | PTO Standby Speed |
| PTO Preset 1 | RES | PTO Preset 2 |
| PTO Preset 2 | SET | PTO Preset 1 |
| PTO Preset 2 | RES | PTO Standby Speed |