Kubota Hydraulic Filter Cross-Reference: Verified by Model

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Quick Answer

Kubota hydraulic and HST (transmission) filters are model-specific, so the safest path is the genuine Kubota number for your tractor. WIX publishes aftermarket matches only for the older numbers HH660-36060 (WIX 51361 and WL7143) and HH670-37710 (WIX WL10285). We found no manufacturer cross for the current numbers HH6F0-36060, HH6C0-37710, HHK70-14073, HHK20-36994, HHTA0-37710 or HH3A0-82623. Two more things matter: some models have a cleanable strainer, others a replaceable suction filter, and Kubota’s manuals give hand-tightening as an additional 1/2 turn after the filter touches the base.

Orange part numbers are Amazon affiliate links (we may earn a commission at no cost to you). Check that the listing title shows your exact part number before you buy.

Strainer, Magnetic Filter or Filter: Know Which You Have

Kubota’s BX manual has you “disassemble and rinse the transmission strainer with nonflammable solvent” when changing fluid (printed p. 89). Kubota’s L2501 manual has you remove and replace the hydraulic oil filter and, separately, wipe metal filings off the magnetic filter (printed p. 66). Do not treat a replaceable hydraulic filter as a cleanable screen. Dealer catalogs call HH3A0-82623 a hydraulic oil filter (inlet/suction), and the L2501 manual says to replace the hydraulic oil filter.

BX Series (BX1880, BX2380, BX2680)

Part	Number	Notes
HST / transmission filter	HHK20-36990 (older) and HHK20-36994 (current)	Dealer catalogs show HHK20-36994 replacing HHK20-36990. We found no Amazon listing for the new number, so the link goes to the older-number listing.
Transmission strainer	K2581-36520 (listed by Messick’s as “FILTER,OIL”)	The BX manual says to clean its “transmission strainer.” The manual page does not print this part number, so we cannot confirm they are the same part.

B Series (B2301, B2601, B2650)

Part	Number	Notes
HST / transmission filter	HH6F0-36060	Replaces HH660-36060 (B2301, B2601, B2650).
Hydraulic filter	HH6C0-37710	Replaces HH670-37710 and HH670-37712 (B2301, B2601, B2650). We found no Amazon listing for the current number. Listings for the older HH670-37710 are for older B-series tractors.

L Series (L2501, L3301, L3901, L4701, L5740)

Model	HST / transmission filter	Hydraulic filter
L2501, L3301, L3901 (HST)	HHK70-14073, replacing HHK70-14070	HH3A0-82623, listed as a hydraulic oil filter (inlet/suction)
L4701	HHTA0-59900, listed by Coleman as the HST high-pressure filter	HHTA0-37710, listed as the hydraulic oil filter
L5740 (HST)	HHTA0-59900 (return line, replacing TA240-59900)	HHTA0-37710 (inlet line, replacing TA040-37710)

Gear-drive versions of the L2501, L3301 and L3901 have no HST filter, so do not order one by the base model name alone. TC630-93230 and TC630-93220, sometimes listed for the L4701, are engine air-cleaner elements, not hydraulic filters.

M Series (M5040, M6040, M7040, M5-111, M6060, M7060)

Model	Hydraulic filter	Notes
M5040	HHTA0-37710	Some serial ranges (80001 and up) require 2, per Coleman’s catalog.
M6040	HHTA0-37710	M6040HDNB versions also list HH3A0-82623.
M7040	HHTA0-37710 (M7040HD)	M7040HDNB also lists HH3A0-82623.
M5-111	HHTA0-37710	M5-111HDC dealer catalog.
M6060	Not found	Kubota’s manual says to remove 2 oil filters but does not print the part number on the page we checked.
M7060	HHTA0-37710 (M7060HD)

M-series tractors that use two filters need two. A 2-pack of HHTA0-37710 is available. The L4701, L5740 and M-series numbers above come from Messick’s and Coleman dealer catalogs.

Service Intervals From Kubota’s Operator’s Manuals

Model	HST filter	Hydraulic filter	Fluid	Manual page
BX1880, BX2380, BX2680	200 hours	None listed. Strainer cleaned every 400 hours.	400 hours	BX manual, printed p. 69
B2301, B2601	200 hours	400 hours	400 hours	B2301/B2601 manual, schedule starts p. 45
B2650	200 hours	400 hours	400 hours	B2650 manual, printed p. 59
L2501, L3301, L3901	200 hours (HST only)	400 hours	400 hours	From Kubota’s contents; schedule rows not inspected
L4701	200 hours (HST only)	400 hours in the manual	400 hours	L4701 manual, printed p. 91
M5-111, M6060, M7060	No separate row found	500 hours	1,000 hours	M5-111 p. 78; M6060/M7060 p. 77
M5040, M6040, M7040	Not found	Not found	Not found	Not found

For the L4701, Coleman’s catalog says the hydraulic filter is due “after the first 50 hours … then every 200 hours.” Kubota’s operator’s manual says every 400 hours. Follow your own manual, and ask your dealer if you are unsure. We could not verify first-service markings for most models, so we do not state a first-change interval.

Aftermarket Matches We Could Verify

WIX filter	Kubota number it lists	Published specs	Notes
WIX 51361	HH660-36060 (older HST number)	3/4-16 thread, 2.475 in gasket, 104.5 mm tall	Current catalog: “51361 Replacement WL7143.”
WIX WL7143	HH660-36060	3/4-16 UNF thread, 98 mm tall	Successor to 51361. Not the same height. No Amazon listing found.
WIX WL10285	HH670-37710 (older B-series hydraulic number)	Not found	Listed in a WIX 2024 new-number announcement as replacing Kubota HH670-37710.

These matches name the older numbers. Kubota replaced HH660-36060 with HH6F0-36060 and HH670-37710 with HH6C0-37710, and we found no WIX row for the current numbers. A supersession chain is not a manufacturer cross, so compare your old filter with the listing before you buy.

How to Change a Hydraulic or HST Filter

Follow your own operator’s manual for your model. This is what Kubota’s procedures for the B2301/B2601 (p. 63), L2501 (p. 66) and M6060/M7060 (p. 104) have in common:

Stop the engine. Kubota’s safety text says to “release all residual pressure” before disconnecting hydraulic lines.
Drain the transmission case oil, as the manual for your model describes. On these models the filter change and transmission fluid service go together.
Remove the old filter (two on the M6060/M7060) and clean the mounting surface.
Put a film of clean transmission oil on the rubber seal of the new filter.
Tighten the filter quickly until it contacts the mounting surface, then tighten it by hand an additional 1/2 turn only.
Refill to the prescribed level. Run the engine a few minutes, stop it, recheck the level and check for leaks around the filter seal.

Warning

Kubota’s manuals we checked do not tell you to pre-fill a hydraulic or HST filter, so we do not recommend it. Do not substitute a filter you cannot match to your tractor’s part number. A poor seal on the suction side can starve the pump.

Fluid: use the fluid your manual specifies. Kubota’s genuine hydraulic and transmission fluid is Super UDT2 (2.5 gal). See our hydraulic fluid change guide and transmission fluid change guide.

If Something Seems Wrong

A restricted filter or strainer is one possible cause of slow loader lift, a hot system or a noisy pump, but check fluid level and condition first. For metallic glitter or milky fluid, see our hydraulic contamination and flush guide. If a loader drifts down after service, see the loader drift guide.

Where to Buy

Genuine Kubota Hydraulic and HST Filters

Match the part number in the listing title to your row above.

HH6F0-36060 (B2301, B2601, B2650 HST)
B-series HST filter.

Check Price on Amazon

HHK70-14073 (L2501, L3301, L3901 HST)
L-series HST filter.

Check Price on Amazon

HH3A0-82623 (L-series hydraulic)
Hydraulic oil filter (inlet/suction).

Check Price on Amazon

HHTA0-59900 (L4701, L5740 HST)
HST high-pressure filter.

Check Price on Amazon

HHTA0-37710 (L4701, L5740, M-series hydraulic)
Single filter.

Check Price on Amazon

HHTA0-37710, 2-pack
For models that use two filters.

Check Price on Amazon

HHK20-36990 (BX HST, older number)
Dealer catalogs now show HHK20-36994.

Check Price on Amazon

WIX Filters Listed for Older Kubota Numbers

These name HH660-36060 and HH670-37710, not the current numbers. Compare before you buy.

WIX 51361
Listed for HH660-36060.

Check Price on Amazon

WIX WL10285
Listed as replacing HH670-37710.

Check Price on Amazon

What We Could Not Verify

Amazon listings for HH6C0-37710, HHK20-36994 and WIX WL7143.
The hydraulic filter part number for the M6060.
Operator-manual service schedules for the M5040, M6040 and M7040, and filter-specific first-service intervals for most models.
That K2581-36520 is the strainer the BX manual says to clean. The manual page does not print the number.
Any manufacturer cross for HH6F0-36060, HH6C0-37710, HHK70-14073, HHK20-36994, HHTA0-37710, HHTA0-59900 or HH3A0-82623.
A Kubota statement that every HST tractor shares one fluid reservoir. The L2501 manual says “Hydraulic oil serves as transmission fluid” (p. 16), and we verified that for that model only.
Whether the L4701 hydraulic filter interval is 400 hours (manual) or 200 hours after the first 50 (Coleman).

How We Verified This Page

Part numbers come from Messick’s and Coleman Equipment dealer catalogs. Service intervals, strainer and magnetic filter wording, tightening and fluid statements come from Kubota-authored operator’s manuals for the BX, B2301/B2601, B2650, L2501, L3301/L3901, L4701, M5-111 and M6060/M7060, hosted by third parties (ManualsLib and Scribd), with printed page numbers where verified. WIX matches come from WIX catalog pages and a WIX announcement. Confirm your number with your Kubota dealer using your serial number before ordering.

❓Frequently Asked Questions

QAre Kubota hydraulic and HST filters the same as the engine oil filter?

No. Dealer catalogs and kits list them as different parts with different numbers, and Kubota’s manuals list them as separate services. See our Kubota Filter Cross-Reference Chart for the oil filter too.

QIs there an aftermarket cross-reference for Kubota hydraulic filters?

Only for older numbers. WIX lists 51361 and WL7143 for HH660-36060, and WL10285 as replacing HH670-37710. We found no manufacturer cross for the current numbers, so compare dimensions and thread before using one.

QCan I clean a Kubota hydraulic suction filter instead of replacing it?

It depends on the part. Kubota’s BX manual says to disassemble and rinse the transmission strainer when changing fluid. Its L2501 manual says to replace the hydraulic oil filter and wipe the separate magnetic filter clean. Follow the procedure for your model.

QHow often do I change the hydraulic filter?

Kubota’s manuals list 400 hours for the B-series and L-series hydraulic filter and 500 hours for the M5-111, M6060 and M7060. The HST filter is 200 hours on the B-series, L-series HST models and BX. See the interval table above.

QHow tight should I make a hydraulic filter?

Kubota’s B2301/B2601, L2501 and M6060/M7060 procedures say to tighten the filter until it contacts the mounting surface, then an additional 1/2 turn by hand only.

QMy model isn’t listed. What should I do?

Check your operator’s manual or a dealer parts diagram for your exact model and serial number. Do not assume a similar model uses the same number.

Related Guides

Kubota Filter Cross-Reference Chart →

Oil, HST and hydraulic filter numbers

Oil Filter Cross-Reference →

Engine oil filter numbers and WIX matches

Hydraulic Fluid Change →

Step-by-step fluid change

Transmission Fluid Change →

Drain, filter and refill

Hydraulic Contamination Flush →

Flushing contaminated fluid

Loader Drift Down →

Common causes

🔧 Own a Kubota ZD zero-turn? See our Kubota ZD Blade Cross-Reference Guide — verified OEM part number, genuine Oregon cross-reference, torque specs and troubleshooting.

🔧 Not sure what’s wrong with your Kubota diesel? See our Kubota Diesel Engine Problems Guide — hard starting, loss of power, smoke diagnosis, overheating and unusual noises in one troubleshooting hub.

🔧 Need the right filter? Use our Kubota Filter Cross-Reference Chart to find the verified oil, HST and hydraulic filter numbers for your model, with supersessions and aftermarket matches.

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Kubota Hydraulic Filter Cross-Reference: Verified by Model

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