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Spare Parts Range for W11 and L09

W11 and L09 are among the most widely used drilling pumps globally, which is why we maintain a large inventory of spare parts for their maintenance and repair.

Original and OEM Spare Parts

We supply bimetallic and zirconia liners, ball and disc valves, XNBR and Kevlar pistons, as well as other critical components required for fast and reliable repairs.

Order Placement and Invoice

You can place orders via our website using the convenient shopping cart, or by sending a request to our email. Once all items are confirmed, we will send you an invoice. If the parts are in stock at our warehouse in Germany, we can dispatch them to you without delay.

Popular Boart Longyear diamond core drilling rigs — LF90, LF-70, and LM-75 — are equipped with W11 and L09 mud pumps, known for their simplicity and durability.


Crankshaft bearing Holder for Boart Longyear W11 (79120)
Used in high-load drilling pumps, the bearing holder maintains bearing stability and provides structural support to prevent misali..
Crankshaft Bearing for Boart Longyear W11 (79121)
79121 Crankshaft Bearing W11..
Valve cover seal for Boart Longyear W11 (79334)
Seal provides a tight seal and prevents leakage of working fluids in the pump. Seals play a key role in maintaining pressure, prot..
O-ring for Boart Longyear L09,W11 (79327)
Designed to ensure fluid containment under pressure in harsh environments. O-rings are used to create a reliable seal, preventing ..
Valve cover for Boart Longyear W11 (79882)
79882 Valve cover..
Valve cover retainer for Boart Longyear W11 (78541)
78541 Valve cover retainer..
Piston Pin Mounting screw for Boart Longyear W11 (79904)
Screw (screw/bolt) provides strong fixation, resistance to vibration and stable operation under heavy loads. Key advantages: Made..
Valve Cover Stud for Boart Longyear W11 (75022)
Essential for cylinder head positioning, this component enhances sealing performance. It is a threaded component used to fasten th..
Valve cover retainer mounting nut for Boart Longyear L09,W11 (44525)
Designed to maintain critical fastening in drilling systems, Hex nut is a robust fastening element commonly used in mud pump conne..
Lock Nut for Boart Longyear W11 (60899)
Ensures tight sealing of components under vibration and pressure, Lock nut prevents unintentional loosening caused by vibration an..
Suction threaded hole plug for Boart Longyear W11 (28097)
Plug component designed for sealing ports and maintaining system integrity in mud pumps. Key advantages: Protects internal system..
Connecting Rod Bolt for Boart Longyear W11 (78547)
Mounting bolt engineered for secure fastening in high-vibration pump environments. Key advantages: Provides reliable clamping for..
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Boart Longyear (W11, L09) | Page 7