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Buyers Products · Engine
BC40
In stock · ships from Knoxville
This is a chrome filler-strainer breather cap for hydraulic oil reservoirs on trucks, trailers, and equipment.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
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All confirmed applications for this part number.
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Designed for hydraulic reservoirs on heavy-duty trucks and trailers. Fits standard filler necks; verify thread pattern and diameter match your reservoir before ordering.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It threads into the reservoir fill neck and allows the tank to 'breathe' so air can enter or escape as the fluid level and temperature change, preventing a damaging vacuum or pressure buildup. Inside, a bayonet-style strainer basket catches larger debris when you're pouring fluid, while the cap itself houses a 40-micron filter to keep airborne dust and dirt out. The cap is also a convenient service point: when it's cracked, the seal is worn, or the filter is clogged, replacing the whole assembly restores proper venting and protection.
Part Number: BC40
BREATHER CAP
Unit: ea
Dealer: Post Onsite
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