The Sutphen tech support team is available for direct assistance from 7 a.m. until 5 p.m. Monday through Friday.

Our experienced technicians are specifically trained to troubleshoot and diagnose issues over the phone or via email. However, we do suggest that before calling, you review the top 10 most frequently asked question below. They may help guide you through a process or understand an issue before calling or emailing.

Tech Support FAQs

Issue: Fuel Gauges Malfunction

Check: Perform updated ground procedure and/or set the fuel gauge parameters in the speedometer.

Issue: Pressure Governor Not Operating Correctly

Check: Inspect the park brake interlock for proper function

Issue: Class 1 Aerial Switches (Bucket Controls) are Cycling

Check: Disconnect each switch, one at a time. If the network returns to normal when a switch is unplugged, the unplugged switch will need to be replaced.

NOTE: New switches must be programmed by the Sutphen Service and Technical Division before installing on the apparatus.

Issue: Auto-Leveling Issue on Bucket

Check: Ensure the wiring to the leveling switch is reading 12V, that the ground is functioning properly and that there are no lose connections. Also, be sure to check that the leveling valve is not leaking or broken, typically caused from overtightening. The leveling valve should only be hand tight.

Issue: Accelerator Pedal Fault Codes

Check: Inspect the accelerator pedal for a 5V reference signal. If you cannot find a signal there, check the coolant temperature sensor and/or look for the C-8 red wire 5V reference.

Issue: Aerial PTO Circuit not Engaging

Check: If the aerial PTO light is not illuminating, look for wear and tear with the pressure switch; investigate the park brake interlock module and/or inspect the PTO solenoid circuit.

Issue: No High Idle or Two Speed Functions at the Pump Panel

Check: First, see if the throttle pedal is locked out. If it is not locked out, inspect the throttle interlock box. If you cannot find the solution, contact your local, certified Sutphen service center or the Sutphen Service and Technical Division directly.

Issue: Compartment Switches are Setting Off False Warnings

Check: There may be a bad connection at the connectors at the rear of body. Be sure to check both sides at different times and inspect the 8B yellow wire. You can also inspect the switches themselves for issues.

Issue: Loss of Power Steering While Idling

Check: Inspect the pressures at the power steering pump and confirm the readings with your local, certified Sutphen service center or the Sutphen Service and Technical Division directly.

Issue: Air Conditioner is Not Blowing Cool Air

Check: Check the condenser fan relay and/or the ground to the condenser fan.

The information above contains general suggestions and troubleshooting information. We recommend that you contact your local, certified Sutphen service center or the Sutphen Service and Technical Division directly with questions or uncertainties.

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