OEM STIHL control piston, part number 4950 510 0301, is a precision pump component used in STIHL RE-series pressure washers. This piston coordinates the distributor action within the pump/valve block, enabling consistent pressure generation and reliable cycling for cleaning tasks in both professional and home-use scenarios.

Overview

• Manufacturer: STIHL
• Part name: Control Piston (Piston Distributeur)
• OEM code: 4950 510 0301
• Application: Pump/valve block component for STIHL RE-series high-pressure washers

Key Features

• Part Number: 4950 510 0301
• Type of machine suitable: STIHL RE-series pressure washers, including RE 100, RE 110, RE 100 PLUS, and RE 110 PLUS
• Installation tips:
  • Ensure the unit is powered off and depressurized before service.
  • Access the pump/valve block to remove the existing piston and seals.
  • Install the genuine STIHL control piston with new OEM seals, aligning with the valve block per STIHL service guidance.
  • Reassemble, check for leaks, and perform a controlled test to verify correct operation.

Notes: For precise torque values, seal specifications, and model-specific installation steps, refer to the STIHL service manual and OEM guidelines to ensure proper fit and performance.

Compatibility

• Suitable machine models: RE 100, RE 110, RE 100 PLUS, RE 110 PLUS (pump/valve block assemblies in these RE-series washers)
• Alternative part numbers (cross-reference):
  • 4950 510 0300 (cross-reference for RE 120 / RE 130 series pumps)
  • 4950 510 0305 (related control piston variant for other RE-series configurations)

Sources: OEM listings and cross-reference references for STIHL RE-series parts, including 4950 510 0301 and related piston revisions.