Piston bellows and sleeve
Pump Bellows, Piston and Sleeve.
The pump piston and shaft assembly is made of stainless steel, whereas the pump sleeve is made of a type of cast iron. Debris logging between the piston and sleeve will cause premature and severe wear and dramatically shorten the pumps live.
Water, when entering the pump will cause the sleeve to rust. This in turn causes the piston to get stuck in the sleeve and render the HPDI pump useless.
Keep in mind that none of the parts are available for purchase from either Yamaha or in the aftermarket. Damage to any one of these parts will render the HPDI pump worthless.
Yamaha HPDI Service.
To keep your Yamaha HPDI pump in good working order and extend the lifespan of the pump considerably send it to us for maintenance.
We don’t just remove and replace the “mystery filters”. We disassemble the pump completely. Thoroughly inspect the internals, component by component . Then clean the pump body and all relevant components ultrasonically. We hand-lap those components that does require so. If all components are clean and meet specification we reassemble and when assembly is complete we test to make sure that your Yamaha High Pressure Direct Injection Pump is working as it is supposed to do.
Since 2006 we have maintained a 24 – 48 hr turnaround time. In the unusual event that your pump may take longer to complete we will contact you to discuss.
If you have any questions, do not hesitate call us from 8 am – 6 pm Central Time at 1.800.381.2065.
Try us, we do not take your business for granted and we are more than willing to earn it!
Want to send your HPDI pump to us for service?