Yamada 771239 Cushion for NDP-5

Basic Info

Warranty Info

Literature

Rebate Info

Video

Brand
Yamada

Manufacturer
Yamada America

Manufacturer Part Number
771239

Country of Origin
Japan

Special Order
No

Exportable
Yes

HTS Code
8413.91.9096

Truck Freight
No

Quantity In Stock
2

On Order
0

Your Price
$8.64

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Yamada 771239 Cushion for NDP-5

The Yamada 771239 is the genuine replacement cushion specified for NDP-5 Series pumps. It cushions the end of travel and quietens the pump as it does so.

Fragments from a disintegrating cushion do not stay put. They find their way into air passages and under valve faces, where they cause exactly the kind of intermittent running fault that takes a long time to trace.

Key Features

Genuine Yamada replacement cushion
Fits NDP-5 Series pumps
Two per pump
Absorbs end of stroke impact in the air motor
Reduces noise and mechanical shock at high cycle rates
Inexpensive part worth replacing at every rebuild

Applications

NDP-5 Series pumps
Air motor overhauls and scheduled service
Quietening a pump that has become harsh at the end of stroke
Replacing hardened or crumbling cushions
Reducing shock loading on rods and diaphragms
Marine, industrial and transfer duty

Specifications

Brand: Yamada
Manufacturer: Yamada America
Manufacturer Part Number: 771239
Part Type: Cushion
Fits: NDP-5 Series pumps
Quantity Used: Two per pump
Series Port Size: 1/4 in on the NDP-5 Series
Condition: New

Frequently Asked Questions

Q: Where do the fragments go when one breaks up?
Into the air passages and under valve faces, which is why a pump that has run on with a failed cushion often needs the air motor cleaned out rather than just a new cushion.

Q: What does a worn cushion sound like?
The pump develops a distinct knock at each end of the stroke and generally sounds harder than it used to. The change is gradual, so it is often only obvious next to a pump that has been serviced.

Q: Does a hard cushion damage anything else?
Yes. The shock it is supposed to absorb is passed into the center rod, the center disks and the diaphragm clamp, all of which are far more expensive than the cushion.

Q: Are they worth replacing at every service?
They are among the cheapest parts in the pump and reaching them is most of the work, so yes - replace them whenever the assembly is open.

Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct cushion.

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