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HF28850 Heavy-Duty Hydraulic Spin-On Filter
Reliable Protection for Construction and Agricultural Machinery
Rated at 12-micron efficiency, removing microscopic particulates that cause pump wear.
Direct replacement for Fleetguard HF28850, Donaldson P556005, and Baldwin BT334.
Features 1 1/8-16 UN-2B thread and reinforced housing to handle hydraulic surges.
Optimized for Bobcat mini-excavators to Hitachi Zaxis mining series.
Detailed Product Description
Protecting Critical Hydraulic Components
A hydraulic filter is designed to remove contaminants from the hydraulic fluid, ensuring the longevity of sensitive components such as high-pressure pumps and directional control valves. The HF28850 acts as a critical barrier against metal shavings, silica, and elastomer degradation particles. By maintaining fluid cleanliness, this filter prevents unplanned downtime caused by hydraulic system sluggishness or component failure.
The AYREST Engineering Advantage
Standard aftermarket filters often suffer from media pleat bunching or bypass leakage. Our HF28850 uses high-grade synthetic-cellulose blended media that maintains its structural integrity under the high-vacuum conditions of cold starts. The heavy-duty canister is manufactured to resist fatigue from pressure pulsations, a common issue in hydraulic circuits of Hitachi ZX and Hyundai R-series machines.
Reliable Performance vs. OEM
While original equipment filters carry a high brand premium, the HF28850 offers an identical micron rating and flow capacity at a lower total cost of ownership. We prioritize Beta Ratio consistency, ensuring that the filter performs as effectively at the end of its service life as it does on day one.
Industrial Application Context
This filter is the primary hydraulic protection for compact equipment (like Bobcat 320/331) and large-scale mining excavators (like the Hitachi ZX870). Its wide application range makes it an essential SKU for parts distributors and rental fleet maintenance centers.
Technical Specifications
| Parameter | Specification Detail |
|---|---|
| Model Number | HF28850 |
| Filter Type | Hydraulic Spin-On Filter |
| Outer Diameter | 93.2 mm |
| Overall Length | 131.8 mm |
| Thread Size | 1 1/8-16 UN-2B |
| Filtration Efficiency | 12 Micron |
| Seal Material | High-Grade Nitrile (Buna-N) |
Cross Reference
Fleetguard: HF28850 | Donaldson: P556005 | Mann Filter: W 935/1 | CASE/CASE IH：H311654
Baldwin: BT334 | HiFi Filter: SH 60134 | Sakura: HC-7940
SF Filter: SPH 9608 | Inline: FH50349
Application Industry Fitment
Hitachi ZX series (up to ZX870 mining excavators) and Hyundai R/HX series machinery.
Bobcat 320/331 E-series; Mahindra and Massey Ferguson tractors; Ausa and JCB machinery.
Dynapac VD series rollers and various road compaction equipment fleets.
Quality and Certification
- ISO 4548-12 Tested: Verified for flow-fatigue and particulate retention efficiency.
- Leak Detection: 100% of units undergo pressure-hold testing to ensure gasket and canister integrity.
- Contamination Control: Manufactured in a clean-room environment to prevent initial system contamination.
Technical FAQ
Q: How do I choose the right hydraulic filter for my excavator?
A: Match the OEM part number and thread size (for HF28850, it is 1 1/8-16 UN-2B) to ensure pump safety.
Q: Is the HF28850 compatible with Bobcat 325 and 331 models?
A: Yes, the HF28850 is the standard replacement for Bobcat 325, 328, 331, and 334 mini-excavators.
Q: What happens if hydraulic filter efficiency is low?
A: Microscopic particles circulate, leading to "sandblasting" of surfaces and eventual pump seizure.
Q: What is the recommended replacement interval?
A: Typically every 500 to 1,000 operating hours, or immediately if the restriction indicator is triggered.
Customization
"Global Supply Partner for High-Performance Hydraulic Solutions"
- 📦 Bulk Orders: We support large-scale wholesale for parts distributors and fleet owners worldwide.
- 🎨 Customization: Private labeling (OEM/ODM) is available upon request for our industrial partners.
- 💰 Get a Quote: Contact us today for tiered pricing, MOQ details, and current export lead times.
WhatsApp / Wechat: +86 13328990097
Email: Sales@enginegensetparts.com
Official Website: www.enginegensetparts.com
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