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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.


Stub for Boart Longyear W11 (18183)
18183 Stub..
Connecting rod upper head bushing for Boart Longyear W11 (75032)
75032 Connecting rod upper head bushing..
Liner cover gasket (copper) for Boart Longyear W11 (75071)
75071 liner cover gasket (copper)..
Valve cover seal (copper) for Boart Longyear W11 (75069)
Seal provides a tight seal and prevents leakage of working fluids in the pump. Seals play a key role in maintaining pressure, prot..
Valve cover for Boart Longyear L09 (75009)
75009 Valve cover..
Flush pump valve ball for Boart Longyear L09 (25307)
25307 Flush pump valve ball..
Piston Cuff holder for Boart Longyear L09 (75028)
75028 Piston Cuff holder..
Piston Locking washer for Boart Longyear L09 (75059)
75059 Piston Locking washer..
(75004) Flushing pump piston FMC for Boart Longyear L09 (79607)
79607 (75004) Flushing pump piston FMC L09..
Liner support gasket for Boart Longyear L09 (75066)
75066 liner support gasket..
Valve cover seal for Boart Longyear L09 (75067)
Seal provides a tight seal and prevents leakage of working fluids in the pump. Seals play a key role in maintaining pressure, prot..
Liner cap lock for Boart Longyear L09 (79060)
Built for resilience, this liner maintains reliable performance in HDD and oilfield applications.Mud pump cylinder liners are crit..
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Boart Longyear (W11, L09) | Page 8