The Kubota ZD21 tractor primary engine air filter part number found is 94310. Service guidance is to check the air filter every 100 hours.
Primary air filter94310
Engine power21 hp
Service intervalCheck every 100 hours
Kubota ZD21 Air Filter Specs
Primary air filter part number
94310
Secondary / safety air filter
K1211-82320
Replacement interval
Check every 100 hours
Number of air filter elements
2 elements (primary, secondary)
Engine horsepower
21 hp
Engine displacement
47.5 cu in (0.78 L)
Kubota ZD21 Air Filter Charts
Engine horsepower
This model
21 hp
Average
23 hp
Low
12 hp
High
40 hp
Engine displacement
This model
47.5 cu in
Average
48 cu in
Low
25 cu in
High
80 cu in
Air filter service interval
This model
100 hr
Average
50 hr
Low
25 hr
High
100 hr
Kubota ZD21 Air Filter FAQ
What air filter does the Kubota ZD21 use?
The primary engine air filter part number found for the Kubota ZD21 is 94310.
How often should the Kubota ZD21 air filter be checked or replaced?
The service guidance found for the Kubota ZD21 is to check the air filter every 100 hours. That is longer than the reference average of 50 hours for this class, so still shorten the interval when the machine is used in heavy dust.
How many air filter elements are listed for the Kubota ZD21?
This page lists 2 elements (primary, secondary). That means the safety element should be treated separately from the outer primary air filter.
Why include engine specs on a Kubota ZD21 air filter page?
For the Kubota ZD21, the engine specs found are 21 hp, 47.5 cu in (0.78 L). This is useful context when comparing similar models, but not a substitute for checking the filter number 94310.
Should I order the Kubota ZD21 air filter by size or part number?
The important buying value for the Kubota ZD21 is 94310. Use the parts manual or dealer lookup if your machine has a different engine or air-cleaner housing.
What should I confirm before buying a Kubota ZD21 air filter?
For the Kubota ZD21, confirm 94310 against the parts manual or official Kubota lookup because air-cleaner parts can change by serial range.
Official information note
Air filter fit can change by engine, serial number, production year and air-cleaner housing. Check the operator manual, parts manual and official kubotausa.com website before buying or fitting an air filter.
