Piston pin – Hahn & Sohn HDE20SS3-DW

The piston pin is a hollow steel rod that passes through the bore in the piston and the small end of the connecting rod, creating a pivoting joint between the two components. It transfers all combustion forces to the connecting rod and crankshaft, so it must be precisely manufactured and hardened to withstand repeated mechanical stress without deformation or wear.

• The part is designed for the four-cylinder diesel engine WEICHAI WP2.3D25E200 (Hahn & Sohn HDE20SS3-DW generator, 20 kW / 25 kVA). During a complete engine overhaul, the piston pin is usually replaced together with the piston and piston rings.

WHY CUSTOMERS CHOOSE IT

• Exact match for the WEICHAI WP2.3D25E200 engine
• Essential part for a complete engine overhaul

PRACTICAL TIP

Before installing the piston pin, check the bore in the piston and connecting rod for wear or ovality — a worn bore will cause undesirable play and engine knocking even with a new pin. Do not forget the retaining rings that secure the pin axially in the piston.

KEY FEATURES

• Type: piston pin (hollow steel rod)
• Material: hardened steel
• Connects the piston to the connecting rod
• Designed for engine: WEICHAI WP2.3D25E200
• Compatible generator: Hahn & Sohn HDE20SS3-DW (20 kW / 25 kVA)

USE / INSTALLATION / OPERATION

1. Remove the piston with the connecting rod according to the service procedure.
2. Remove the retaining rings from both sides of the piston pin.
3. Press the old pin out of the piston and connecting rod bore.
4. Lightly lubricate the new pin with oil and insert it into the piston and connecting rod bore.
5. Secure it with new retaining rings on both sides.

Installation requires experience with complete engine overhauls and suitable tools.