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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.


Mud pump stem oil seal for Boart Longyear L09 (79316)
Ideal for sealing rotating shafts in mud pumps, oil seals play a key role in preventing lubricant leaks and protecting internal co..
Drive shaft for Boart Longyear L09 (79086)
Used in heavy-duty pump systems, this part ensures optimal power delivery and mechanical integrity. Transfers torque from the powe..
Piston Pin Mounting screw for Boart Longyear L09,W11 (79090)
Screw (screw/bolt) provides strong fixation, resistance to vibration and stable operation under heavy loads. Key advantages: Made..
Connecting rod inserts (pair) of the flushing pump for Boart Longyear L09 (75079)
75079 Connecting rod inserts (pair) of the flushing pump..
Bearing Cup Gasket for Boart Longyear L09 (79083)
79083 Bearing Cup Gasket..
Flange mounting Bolts for Boart Longyear L09 (44511)
Fastener component used in heavy-duty mud pump joints for reliable performance. Key advantages: Corrosion-resistant for harsh con..
Liner Cover for Boart Longyear L09 (75008)
75008 liner Cover..
Rear cover mounting bolt for Boart Longyear L09 (44538)
Rear cover mounting bolt for Boart Longyear L09 (44538)..
Connecting Rod Pin for Boart Longyear W11 (75076)
75076 Connecting Rod Pin W11..
Drive shaft front flange for Boart Longyear L09 (79074)
Used in heavy-duty pump systems, this part ensures optimal power delivery and mechanical integrity. Transfers torque from the powe..
Oil seal holder support gasket for Boart Longyear W11 (79748)
Essential for fluid retention in drilling systems, oil seals play a key role in preventing lubricant leaks and protecting internal..
Sealing nut for Boart Longyear W11 (79320)
Provides structural integrity in fluid end assemblies, Hex nut is a robust fastening element commonly used in mud pump connections..
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Boart Longyear (W11, L09) | Page 4