Kohler KD477-2® Engine

Shared across brands: Durapac, Kohler

How to read your Kohler engine serial & model number →

• Noisy operation
  Cause: Air trapped in system
  Fix: Check all points where air may leak into the system; Refer to 6.2 – Bleeding Air from the System
• Power unit runs but will not pump oil
  Cause: Power unit is not primed
  Fix: Run power unit a few minutes tipping from side to side
• Application responds to pressurised fluid, but system does not maintain pressure
  Cause: Leaky connection
  Fix: Clean, reseal with thread sealant, and tighten connection
• Application responds slower than normal
  Cause: Loose connection or coupler
  Fix: Tighten couplers
• Application does not extend, move or respond to pressurised fluid
  Cause: Overload condition
  Fix: Remedy overload condition
• Application does not fully extend (cylinder or spreader)
  Cause: Reservoir overfilled
  Fix: Secure load by other means; Depressurise power unit and hose, remove application, then drain fluid to proper level
• Power unit does not reach rated capacity
  Cause: Low fluid level in reservoir
  Fix: Secure load by other means; Depressurise power unit and hose, remove application, then fill and bleed the system
• Poor performance
  Cause: Fluid level in power unit is low
  Fix: Secure load by other means; Depressurise power unit and hose, remove application, then fill and bleed the system
• Application does not return fluid to power unit (i.e. cylinder will not retract)
  Cause: Closed release valve
  Fix: Secure load by other means

Compiled from service & troubleshooting documentation across every generator set that uses the Kohler KD477-2®.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.