Fleetguard ST1801, direct aftermarket replacement. This filter is a direct replacement hydraulic filter element for Hydac hydraulic systems, built to the original dimensions and ratings. It uses inorganic microfibre media with a 5 µm absolute filtration rating, capturing fine contaminants that cause wear in pumps, valves and actuators. The element handles a collapse pressure of 10 bar, ensuring reliable performance in demanding applications. Choosing this aftermarket alternative maintains high fluid cleanliness without the premium cost of branded elements. It installs directly into compatible filter housings, offering consistent quality and inventory simplicity for your maintenance programme.
Technical properties & cross references
Specifications
| Element Collapse pressure |
10 bar (145 PSI) |
| Filtration Media |
Inorganic Microfibers 5 µm |
| Media type |
Inorganic Microfibers |
| Filtration Rating |
5 µm |
| Flow direction |
Out-In |
| Body Height |
100 mm (3 15/16") |
| Total Height |
100 mm (3 15/16") |
| Largest Inner Diameter |
32.2 mm (1 9/32") |
| Largest Outer Diameter |
58 mm (2 9/32") |
| Stat. HS-Code |
84149000 |
| Country of Manufacture |
China |
Price beat guarantee
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller |
Price |
Checked |
| Oxfil |
USD 40.35 |
16 Oct 2026 |
| Cardinal Filters |
USD 58.78 |
12 Oct 2026 |
| Filtration Point |
USD 62.18 |
12 Oct 2026 |
| Hydrafil |
USD 92.95 |
12 Oct 2026 |
| Spare Part Mart |
USD 32.28 |
Today |
Our price of USD 32.28 is 20% to 65% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Use cases & applications
High-Pressure Hydraulic Circuits
The robust 10-bar collapse pressure rating allows this element to perform reliably in systems with high differential pressures. This safeguards sensitive components against unexpected bypass situations, extending the service life of pumps and valves.
Dusty and Abrasive Work Environments
In quarries, mines or construction sites, airborne dust can enter hydraulic reservoirs. The inorganic microfibre media traps particles as small as 5 µm, preventing abrasive wear and keeping oil clean between scheduled changes.
Round-the-Clock Production Machinery
For hydraulic power units running 24/7, consistent filtration is critical. This element’s high dirt-holding capacity supports longer service intervals, reducing downtime and maintenance labour costs.
Fleet and Multi-Machine Maintenance
Standardising on this filter across your Hydac-equipped fleet simplifies parts inventory. Its direct-fit design and dependable quality eliminate guesswork, making bulk purchasing economical without compromising performance.
Frequently asked questions
Will this filter fit my hydraulic system?
It is designed as a direct replacement for Hydac filter elements using housings that accept dimensions: body height 100 mm, outer diameter 58 mm, inner diameter 32.2 mm. Always check your equipment manual or measure your current element before ordering to confirm compatibility.
What level of filtration does this element provide?
The inorganic microfibre media achieves an absolute filtration rating of 5 microns, effectively removing fine particulates that can damage hydraulic components. This high efficiency helps maintain system cleanliness and fluid life.
What are the exact dimensions and flow path of this filter?
Total height and body height are both 100 mm. The largest outer diameter is 58 mm and largest inner diameter is 32.2 mm. Flow direction is from the outer surface to the inner core (out-to-in). Check your housing for compatible sealing arrangements.
Is this a genuine OEM filter?
No, this is a high-quality aftermarket replacement manufactured to the original dimensions and ratings for Hydac and other brands’ elements. It is not a genuine OEM part, but it provides comparable performance at a more competitive price point.
How do I install this replacement element?
Replacement follows standard hydraulic filter service procedures. Depressurise the system, remove the old element, clean the housing and install this filter ensuring proper alignment. Refer to your machinery service manual for specific torque and safety instructions.
What are the delivery and guarantee terms?
All Spare Part Mart products include a 30-day money-back guarantee and our price-beat guarantee. We offer worldwide shipping with tracking, so you can order with confidence regardless of your location.