Which pumps does this tapered pony rod fit?

It is listed to fit the KT-3400PT, T-35 and T-40 pumps.

What does a pony rod do?

It is the intermediate rod between the crosshead and the piston rod, passing through the oil-seal housing that divides the power end from the fluid end and carrying the reciprocating motion across that boundary.

What reference part number does it replace?

It is an aftermarket replacement for Kerr part KF275-400; the brand and number are for identification only and do not imply OEM manufacture.

KT - PONY ROD PISTON PUMP TYPE TAPERED

KT - PONY ROD PISTON PUMP TYPE TAPERED — Pump, Piston (Unit) aftermarket replacement part

This is a tapered-type pony rod for piston pumps. The pony rod (intermediate rod) extends between the crosshead and the piston rod, passing through the oil-seal housing that separates the power end from the fluid end and transmitting the reciprocating motion of the drive train. It is an aftermarket replacement for Kerr KF275-400 and fits the KT-3400PT, T-35 and T-40 pumps. Unit weight is about 5 lb.

What it is

This is a complete reciprocating piston pump unit; the listed rating describes its published flow and pressure capacity.

Pump compatibility

KT-3400PT
T-35
T-40

Specifications

Property	Value
Weight	5.00 lb (≈ 2.27 kg, converted)
Width	（无）
Height	（无）
Depth	（无）

Manufacturer technical notes

KT Pony Rod for Tapered Piston Pump (SKU: KF275-400) API 7K-certified 42CrMo4 alloy steel forging (tensile strength ≥980MPa) with quenching+tempering (hardness HRC52-58), hard chrome plating thickness 25μm (ASTM B117 salt spray tested 72hrs corrosion-free), compatible with high-pressure mud pumps (pressure differential capacity ≥45MPa), CNC-machined tolerance ±0.001"。

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing Kerr KF275-400.

FAQ

Which pumps does this tapered pony rod fit?: It is listed to fit the KT-3400PT, T-35 and T-40 pumps.
What does a pony rod do?: It is the intermediate rod between the crosshead and the piston rod, passing through the oil-seal housing that divides the power end from the fluid end and carrying the reciprocating motion across that boundary.
What reference part number does it replace?: It is an aftermarket replacement for Kerr part KF275-400; the brand and number are for identification only and do not imply OEM manufacture.

Related parts

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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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