Yamada 770570 Gasket
The Yamada 770570 is the genuine replacement gasket specified for Yamada air operated double diaphragm pumps using this gasket. It goes between two machined faces and keeps the air passages behind them separate from each other.
Gaskets take a set in the shape of the joint and stick to one face, so they almost always tear on disassembly. Replacing rather than reusing is not a preference, it is the practical reality of opening the joint. Clean both faces back to bare metal before fitting the new one and check for scoring while the joint is open.
Key Features
- Genuine Yamada replacement gasket
- Fits Yamada air operated double diaphragm pumps using this gasket
- One per pump
- Cut to the factory port pattern so air passages line up
- Restores a positive seal between machined faces
- Inexpensive part that prevents erratic running and stalling
Applications
- Yamada air operated double diaphragm pumps using this gasket
- Air valve and pilot valve overhauls
- Chasing erratic cycling or a pump that stalls
- Reassembly after any joint in the air motor is opened
- Scheduled air motor service
- Marine, industrial and transfer duty
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 770570
- Part Type: Gasket
- Fits: Yamada air operated double diaphragm pumps using this gasket
- Quantity Used: One per pump
- Condition: New
Frequently Asked Questions
Q: Does it matter which way round the gasket goes?
Yes. The holes match the port pattern of that joint and are often not symmetrical. Fitting one reversed blocks a passage and the pump will not cycle.
Q: Should I use sealant as well?
No. The joint is designed to seal on the gasket alone, and sealant squeezed into an air passage is a good way to create a fault that is very hard to find.
Q: How should the faces be prepared?
Clean both back to bare metal with a plastic scraper, then check for scoring across the joint. Do not use an abrasive disc, which dishes the face and creates the leak you are trying to cure.
Q: How often should gaskets be replaced?
Every time the joint is opened, and as a matter of course whenever the air valve or pilot valve is being serviced for a running fault.
Not sure this is the right part? Send us a picture of your Pump Plate to https://www.clrmarine.com/Contact-Us and the CLR Marine team will confirm the correct gasket.
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