Iseki TK filter set & filters: the complete overview per model

The Iseki TK filter set and all individual filters at a glance: in this blog you'll see exactly which filters are fitted on the Iseki TK series, when to replace them, and how to arrange the complete maintenance in a single order. The filters are largely the same across the whole series — from TK21 to TK538 — which keeps your stock on the shelf nice and manageable.

Suitable for the whole series: Iseki TK21, TK25, TK29, TK33 (Japanese) and Iseki TK527, TK532, TK538 (European).

Iseki TK filter set: everything in one box

For the complete series we supply one maintenance set with the engine oil filter, the air filter element, and the fuel filter: the Filter set Iseki TK21 – TK33 | TK527 – TK538 (SKU-10081). This lets you carry out the minor service in one go according to the maintenance schedule. Below we explain each filter in detail.

Iseki TK engine oil filter

A screw-on cartridge on the engine block. Replace: after the first 50 hours, then according to schedule together with the oil change. Don't pre-fill the new filter; lightly oil the rubber gasket, tighten by hand plus half a turn, and check for leaks after a test run. Available separately as Engine oil filter Iseki (SKU-002/6).

Iseki TK air filter

Dry paper element in a cylindrical housing. The Japanese manual states: blow out every 100 hours (from inside to outside, max. low pressure), and replace after five cleaning cycles, if damaged, or after 600 hours at the latest. Never tap the element against a wheel — a dent in the paper lets unfiltered air through, and that costs the engine its cylinder walls. A clogged air filter shows up as black smoke and loss of power; a damaged element as dust in the intake. Available separately as Air filter Iseki TA | TK (SKU-20008).

Iseki TK fuel filter

The fuel filter sits with a sediment bowl between the tank and the lift pump. Maintenance according to the manual: clean the bowl every 100 hours (close the tap, remove the bowl, rinse with clean diesel), replace the element every 300 hours, and then bleed the system. Water or sediment in the bowl? Drain it immediately — water is disastrous for the fuel pump and injectors. Available separately as Fuel filter Iseki (SKU-150003).

Iseki TK hydraulic filter and suction filter

The transmission/hydraulics have two filters: a screw-on oil filter cartridge (replace: after the first 50 hours, then every 200–300 hours, see schedule) and a suction strainer in the housing that you clean during the oil change. This duo is directly responsible for a healthy lift function: in practice, a clogged suction filter is the classic cause of a slow or unresponsive lift. See also Troubleshooting Iseki TK faults.

Iseki TK power steering filter

The power steering circuit has its own small filter that you replace every 300 hours together with the steering fluid. A neglected steering filter shows up as heavy or jerky steering at low RPM.

Iseki TK original filter numbers (for reference)

For those who want to cross-reference by number: these are the original Iseki numbers from the Japanese manual. For reference only — always verify against your serial number, especially with grey imports.

Other wear parts from the same list: fan belt (HM profile, circumference 966 mm), battery 80D-26R (12V 55Ah), headlights 12V 45/45W. Belt and battery are supplied locally to size; if in doubt, note the size of the old part.