Slew Motor / Swing Motor Repair & Service

Complete loss of function can occur due to insufficient hydraulic flow or electrical problems.

• Solution:
  • Check the hydraulic fluid level and ensure there are no leaks.
  • Inspect and clean hydraulic filters.
  • Verify the electrical connections to the swing motor solenoid.

Low hydraulic pressure or flow can lead to sluggish operation.

• Solution:
  • Inspect the hydraulic pump for damage or wear.
  • Check for blockages in the swing circuit.
  • Replace worn-out hydraulic lines or seals.

Jerking during operation can result from air in the hydraulic system or faulty components.

• Solution:
  • Bleed the hydraulic system to remove air.
  • Inspect and replace a damaged swing bearing or control valve.
  • Check for contamination in the hydraulic fluid.

Overheating can be due to excessive friction or hydraulic inefficiency.

• Solution:
  • Ensure the hydraulic cooler is clean and functional.
  • Replace worn-out bearings or seals in the swing motor.
  • Verify proper hydraulic fluid type and levels.

Leaks may result from damaged seals or connections.

• Solution:
  • Replace worn seals or O-rings.
  • Tighten or replace hydraulic fittings.
  • Inspect the swing motor housing for cracks.

Noise could indicate bearing failure or insufficient lubrication.

• Solution:
  • Inspect and replace worn or damaged bearings.
  • Check the hydraulic fluid level and quality.
  • Look for contamination in the hydraulic system.

Power loss may occur due to a weak hydraulic pump or internal leaks.

• Solution:
  • Test the hydraulic pump pressure and replace if necessary.
  • Inspect the swing motor’s internal components for wear.
  • Check the control valve for sticking or leakage.

A faulty directional control valve or solenoid might be the cause.

• Solution:
  • Test and replace the directional control valve.
  • Inspect electrical solenoids and wiring for faults.

Excessive play might result from a worn swing bearing or loose mounting bolts.

• Solution:
  • Tighten or replace the swing motor mounting bolts.
  • Replace the swing bearing if it shows significant wear.

• Solution:
  • Perform regular maintenance and inspections.
  • Use clean, high-quality hydraulic fluid and replace it as recommended.
  • Monitor for early signs of wear or leaks.
  • Keep hydraulic filters clean and replace them as needed.