Liner Assembly 3" RD Piston Complete/Extension Rod/Locknut/Chrome Liner/Gasket
This is a complete 3" RD piston liner assembly for the pump fluid end, supplied with the piston, extension rod, locknut, chrome liner and gasket as one ready-to-install package. The piston transmits force from the power end to the pumped fluid and reciprocates within the chrome liner bore on every stroke. It is an aftermarket replacement for Kerr KP-285-300CH-RD-A, fits the JT40 and KP-3300PT pumps, and weighs about 9 lb.
What it is
A pump piston transmits force from the power end to the pumped fluid inside the cylinder liner. It carries the sealing element and reciprocates within the liner bore on every stroke.
Pump compatibility
- JT40
- KP-3300PT
Specifications
| Property | Value |
|---|---|
| Weight | 9.00 lb (≈ 4.08 kg, converted) |
| Width | （无） |
| Height | （无） |
| Depth | （无） |
Manufacturer technical notes
3"RD Liner Assembly (SKU KP-285-300CH-RD-A). 4340 steel + 0.2mm hard chrome. 12,000PSI rated, Ra0.04μm finish, includes preload nut/metal gasket for KP-series pumps.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing Kerr KP-285-300CH-RD-A.
FAQ
- What is included in this 3" RD liner assembly?
- As described in its name, it comes complete with the piston, extension rod, locknut, chrome liner and gasket.
- Which pumps does this assembly fit?
- It is listed to fit the JT40 and KP-3300PT pumps.
- What reference part number does it replace?
- It is an aftermarket replacement for Kerr part KP-285-300CH-RD-A; the brand and number are for identification only and do not imply OEM manufacture.
Related parts
All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.
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