0070133020 GL 20 STOPPER is a specific part for a Koshin pump (likely from the GL series, which are high-performance gear pumps).

The part number 0070133020 corresponds to a Stopper (often aspecialisedd bolt or pin) used in the pump assembly.

Function of the Stopper in Koshin GL Pumps.

In the context of Koshin gear pumps (like the GL-13, GL-20, or GL-25), the stopper serves a critical structural and safety role:

1. Gear Alignment & Spacing: It acts as a mechanical limit to ensure the internal gears or the bypass valve components remain within their designated track.

2. Pressure Regulation (Bypass Valve): On many GL models, a stopper is used within the bypass valve assembly. It prevents the spring and valve from over-extending, ensuring that when pressure builds up, the fluid is recirculated safely without damaging the pump casing.

3. Vibration Dampening: It prevents "creeping" of internal components during high-RPM operation, which maintains the vacuum seal necessary for self-priming pumps.

Technical Details for Part #0070133020Compatibility:

1. This specific stopper is most commonly used in the GL-20-5 and GL-25-5 models.

2. Material: Usually hardened steel or a corrosion-resistant alloy to withstand the fluids being pumped (often oil or heavy fuel).

Maintenance Tip:

If you are replacing this due to a leak or pressure drop, check the O-ring associated with the stopper/plug. Often, the stopper itself is fine, but the seal has perished. Do not overtighten: Since these pumps are often made of cast iron or aluminium, overtightening the stopper can crack the pump body.

Technical Spec

Koshin Genuine Parts only from the KOSHIN official distributor!