Yamada 630807 Retaining Ring for DP-10 and DP-15
The Yamada 630807 is the genuine retaining ring for DP-10 and DP-15 Series pumps and AD Series dampeners. It looks like ordinary hardware and is not: the grade, the length and the thread are chosen for a joint that is clamping an elastomer bead and being shaken several hundred times a minute.
Substituting hardware store hardware is a false economy here. Wrong grade bolts stretch, wrong length bolts bottom out before they clamp, and plated fasteners in a marine environment seize into the casting so the next rebuild starts with drilling. Keeping a few spares with the seal kit avoids all of it.
Key Features
- Genuine Yamada replacement retaining ring
- Fits DP-10 and DP-15 Series pumps and AD Series dampeners
- One per pump in the assembly that uses it
- Correct grade, length and thread for the joint
- Keeps clamping load even around elastomer sealed faces
- Direct replacement for corroded, stretched or missing hardware
Applications
- DP-10 and DP-15 Series pumps and AD Series dampeners
- Pump rebuilds and scheduled overhauls
- Replacing corroded or seized hardware
- Making up a complete set after a strip down
- Marine installations where corrosion takes fasteners first
- Industrial and transfer pump service
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Manufacturer Part Number: 630807
- Part Type: Retaining Ring
- Fits: DP-10 and DP-15 Series pumps and AD Series dampeners
- Quantity Used: One per pump
- Series Port Size: 3/8 in on the DP-10 Series
- Condition: New
Frequently Asked Questions
Q: Can I use a standard bolt from a hardware store?
It is not advisable. Grade, length and thread are chosen for the joint, and a substitute that stretches or bottoms out changes the clamping load on a face that is sealed by an elastomer bead.
Q: Why did the original corrode so badly?
Salt air and washdown get into the threads and stay there. On marine installations the fasteners are usually the first part of the pump to need attention, well before anything internal.
Q: What torque should I use?
The factory figure for that joint, applied in sequence across the joint rather than around it. Even clamping is what keeps the sealed faces sealed.
Q: Do I need to replace all of them at once?
If several are corroded, replace the set. A mix of new and tired fasteners gives uneven clamping, and the old ones will need doing at the next service anyway.
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 retaining ring.
CLRMarine
