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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.


Oil Seal Holder Retainer for Boart Longyear W11 (79326)
Essential for fluid retention in drilling systems, oil seals play a key role in preventing lubricant leaks and protecting internal..
Oil filling hole cover for Boart Longyear L09,W11 (79081)
79081 Oil filling hole cover..
Crankcase oil drain plug for Boart Longyear W11 (79112)
Used for reliable closure of drain, suction, or inspection ports in drilling pump assemblies. Key advantages: Protects internal s..
Liner Cap Stud for Boart Longyear W11 (75041)
Designed to maintain structural integrity in high-pressure mud pump environments. It is a threaded component used to fasten the cy..
Oil Level check valve for Boart Longyear L09,W11 (79098)
79098 Oil Level check valve..
Rear cover gasket for Boart Longyear W11 (75045)
75045 Rear cover gasket..
Drive shaft flange (rear) for Boart Longyear W11 (79108)
Engineered for high-load environments, this component enhances the reliability and performance of the transmission system. Connect..
Liner Cover Retainer Nut for Boart Longyear W11 (44526)
Designed to maintain critical fastening in drilling systems, Hex nut is a robust fastening element commonly used in mud pump conne..
Drive shaft flange for Boart Longyear W11 (79109)
Used in heavy-duty pump systems, this part ensures optimal power delivery and mechanical integrity. Connects the drive shaft to th..
Piston Lock for Boart Longyear W11 (75062)
75062 Pump piston Lock W11..
Drive shaft flange gasket for Boart Longyear W11 (75043)
Engineered for high-load environments, this component enhances the reliability and performance of the transmission system. Provide..
Piston rod hex nut for Boart Longyear L09,W11 (75027)
Used to secure threaded connections in mud pump assemblies, Hex nut is a standard fastening component, easily tightened with a wre..
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Boart Longyear (W11, L09) | Page 5