Hydraulic Filters

Spin-On Hydraulic Filter - Replacement for Ditch Witch 418 - PartsOnline
In-Line Hydraulic Filter - Replaces John Deere KV13414 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces John Deere AM102723 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0743 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Toro 1085194 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Toro 751330 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Toro 751320 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces New Holland 89821388 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 1081153 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces John Deere T175002 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Ford F0NN6714CA12H - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Ford F0NN6714CA - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces McCormick D120594 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I1761 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0610 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0548 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Ford 818637990 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Volvo 110366077 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces New Holland 9821388 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Ford 81863799 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Hitachi 73131887 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Ford 18637992 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Volvo 16563975 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces New Holland 9821387 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Clark C4328079 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Clark 4328079 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0554 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces CAT 1919784 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Toro 1271220 - PartsOnline
Spin-On Duramax Hydraulic Filter - Replaces Hyster 398706 - PartsOnline

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Hydraulic Filter Fitment and Compatibility

Hydraulic filters match to the machine's circuit rather than its engine, which is the opposite of how oil and fuel filters work, so the OEM number from the machine's parts diagram is the reliable identifier. Common replacements include the hydraulic oil filters replacing Bobcat OEM 6661248 and 6677652, the hydraulic case drain filter element replacing Bobcat OEM 6661807, the spin-on hydraulic filter replacing Kubota OEM 3270137950, and the spin-on Duramax filter replacing New Holland OEM 81863799.

Most machines carry more than one hydraulic filter, and this is where owners get caught. A skid steer typically runs a main hydraulic or hydrostatic filter plus one or two case drain filters, and some designs add an in-tank suction screen. Changing the main filter and leaving the case drains is a common and expensive miss, since a blocked case drain builds pressure where the drive motors least tolerate it.

Types of Replacement Hydraulic Filters

Spin-on filters thread onto a filter head and are the most straightforward change. Cartridge and in-tank elements drop into a housing inside or on the reservoir. Case drain filters sit in the low-pressure return from the drive motors and are usually smaller and easier to overlook. Suction strainers and screens sit before the pump and often need cleaning rather than replacing.

Hydraulic fluid is the machine's most expensive consumable, and filters are what protect it and the pumps it feeds. Change intervals commonly run 500 to 1,000 hours depending on the circuit, with the first change after a rebuild much earlier because assembly debris finds its way in.