Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Donaldson · Filtration
P550388
In stock · ships from Knoxville
The Donaldson P550388 is a spin-on hydraulic filter designed to remove contaminants from hydraulic fluid in heavy-duty equipment.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 5 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Caterpillar
Other applications
Caterpillar
Other applications
Fits a wide range of hydraulic systems when matched to the correct housing. The cross‑reference list includes many OEM part numbers; verify compatibility with your equipment's filter specifications before ordering.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 8 of 8.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It helps protect hydraulic pumps, valves, and actuators from abrasive particles, extending component life and maintaining system performance. This filter is commonly used on construction, agricultural, and material handling machinery. Replace it at regular service intervals or when a restriction indicator shows excessive pressure drop to avoid damage.
Part Number: P550388
SPIN ON FILTER CUMMINS = 51740 WIX
Vendor: Donaldson
Dealer: KP Services Crossville
Compatibility, alternatives, and more
