Hydraulic pump does not develop pressure. Low or zero pressure with screeching noise.
To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
- Check dipstick to ensure that hydraulic reservoir is properly filled.
- Make sure the hydraulic pump inlet fitting is fully tight, to ensure no air is leaking into the hydraulic pump inlet.
- To prime pump:
- Run unit at lowest pressure setting and slowly increase pressure.
- In some cases it may be necessary to remove cover shroud, belt guard, and drive belt to allow for manual (counterclockwise) rotation of hydraulic pump.
- Turn fan pulley by hand. Verify oil flow by removing oil filter to see flow into filter manifold.
- Reinstall oil filter.
- Do NOT operate unit without a properly installed oil filter.
- If noise continues longer than 30 seconds, turn off main power disconnect to shut off the motor.
- Check that the hydraulic pump inlet fittings are tight and that the pump has not lost its prime.
- Ensure that the reservoir is properly serviced.
- Improve ventilation to allow more efficient heat dissipation.
- Check drive belt condition.
- Replace if broken.