Yamada 711901 Center Rod for NDP-80

Basic Info

Warranty Info

Literature

Rebate Info

Video

Brand
Yamada

Manufacturer
Yamada America

Manufacturer Part Number
711901

Country of Origin
Japan

Special Order
No

Exportable
Yes

HTS Code
8413.91.9096

Truck Freight
No

Quantity In Stock
4

On Order
0

Your Price
$145.60

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Yamada 711901 Center Rod for NDP-80

The Yamada 711901 is a factory center rod used in NDP-80 Series pumps. It runs through the throat bearing in the center block and carries every bit of the load the air motor produces.

Always fit the rod with the specified grease on the bearing area. It is a small detail that the factory calls out specifically, and a dry assembly wears the bearing and the packing far faster than the duty alone would.

Key Features

Genuine Yamada replacement center rod
Fits NDP-80 Series pumps
One per pump
Ties both diaphragm assemblies into one reciprocating unit
Ground bearing surface for correct sealing against the packing
Direct replacement, no modification required

Applications

NDP-80 Series pumps
Air motor and center block overhauls
Replacing a scored, pitted or bent rod
Service after product contamination of the air side
Rebuilds following a diaphragm failure
Marine, industrial and transfer duty

Specifications

Brand: Yamada
Manufacturer: Yamada America
Manufacturer Part Number: 711901
Part Type: Center Rod
Fits: NDP-80 Series pumps
Quantity Used: One per pump
Series Port Size: 3 in on the NDP-80 Series
Condition: New

Frequently Asked Questions

Q: The pump stalls part way through a stroke. Is the rod the cause?
It can be. A worn rod lets air leak past the packing so the air motor never builds enough pressure to complete the stroke. Check the air valve and pilot valve too, since they produce the same symptom.

Q: Does the rod need lubrication on assembly?
Yes. Yamada specifies grease on the rod where it passes through the bearing. Assembling dry accelerates wear on both the bearing and the packing.

Q: Can I reuse the old packing with a new rod?
No. The packing has bedded to the old rod profile and will leak against a new one. Fit new packing and, if it is worn, a new throat bearing at the same time.

Q: Why is the rod for PTFE diaphragm pumps different?
PTFE diaphragms have a different stroke geometry and clamping arrangement, so the rod length and thread detail differ. Match the rod to the diaphragm type the pump is built with.

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 center rod.

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