The 803112558 Suction Oil Filter is a genuine XCMG hydraulic suction strainer designed for GR series motor graders. This heavy-duty filter protects the hydraulic pump from large contaminants by straining return oil before it enters the pump inlet. The 803112558 suction oil filter features a high-flow wire mesh element with a built-in bypass valve and a magnetic pre-filter for ferrous particle capture. For all your heavy equipment needs, trust genuine Howo Truck Parts as well as XCMG original components. It is a critical component for preventing pump cavitation, reducing wear, and ensuring long hydraulic system life on GR series graders.
The 803112558 Suction Oil Filter is manufactured to ISO 16889 standards, with a filtration rating of 150 microns (nominal) and a flow capacity of 250 L/min. The filter element is made from stainless steel wire mesh, pleated for increased surface area, and supported by a perforated steel core. The built-in bypass valve opens at 0.5 bar differential pressure to ensure continuous oil flow to the pump even when the filter is clogged. As a genuine XCMG part, it matches the original tank flange, thread size (M42 × 2), and bypass setting exactly.
Engineered for extreme durability, the 803112558 Suction Oil Filter has an operating temperature range of -30°C to +100°C and is compatible with mineral oils, synthetic hydraulic fluids, and biodegradable oils. The heavy-duty steel housing is powder-coated for corrosion resistance, and the internal magnet captures ferrous particles down to 50 microns. Each filter is 100% flow-tested and inspected for mesh integrity. Using genuine XCMG suction oil filters prevents pump starvation, reduces component wear, and extends hydraulic fluid life.
| Parameter | Specification |
|---|---|
| OEM Number | 803112558 |
| Product Name | Suction Oil Filter (Hydraulic Tank Strainer) |
| Brand | XCMG (Genuine OEM) |
| Filter Type | Suction strainer, wire mesh with magnet |
| Filtration Rating | 150 microns (nominal) |
| Flow Capacity | 250 L/min |
| Bypass Valve Setting | 0.5 bar ±10% |
| Thread Size | M42 × 2.0 |
| Magnet Strength | 1500 Gauss (ferrous capture) |
| Overall Diameter | 95 mm |
| Overall Length | 220 mm |
| Temperature Range | -30°C to +100°C |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids |
| Service Interval | 1000 hours or as indicated by pressure gauge |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG suction oil filter is essential for protecting the hydraulic pump from contamination. Its robust mesh and magnetic pre-filter outlast generic filters, preventing pump failure and costly system repairs.
Aftermarket suction filters often use low-quality mesh that can tear or restrict flow, causing pump cavitation. The genuine 803112558 Suction Oil Filter from XCMG features a precision-woven stainless steel mesh with a high burst strength. Independent tests show that OEM filters maintain structural integrity at 5 bar differential pressure, while generic filters may collapse at 2 bar. This reliability prevents pump damage and ensures consistent hydraulic flow.
Each 803112558 Suction Oil Filter is traceable to its production batch, with records of mesh integrity, magnet strength, and bypass valve calibration. The filter housing is stamped with the XCMG part number for easy identification. XCMG’s quality control includes 100% flow testing and random sampling for burst pressure validation. Only filters that meet all specifications are shipped, ensuring reliable protection for your grader’s hydraulic system.
Installing the 803112558 Suction Oil Filter requires draining the hydraulic tank below the filter port. Clean the tank flange and remove the old filter. Inspect the O-ring and replace if damaged. Apply a thin film of clean hydraulic oil to the new O-ring. Screw the new filter into the tank by hand until snug, then tighten an additional 1/2 turn (approximately 30 Nm). Refill the tank and check for leaks. If a vacuum gauge is installed, reset it after installation.
Inspect the 803112558 Suction Oil Filter every 500 hours using the vacuum gauge. Replace the filter when the gauge reaches the red zone or every 1000 hours. If the filter element is torn or the magnet is heavily loaded with metal particles, change the hydraulic oil immediately. Store spare filters in a clean, dry place. Keep a stock of this filter in your parts inventory, as a clogged suction filter can cause pump starvation and overheating.
A dirty or incorrect suction filter restricts oil flow to the pump, causing cavitation, noise, and premature pump failure. The genuine 803112558 Suction Oil Filter restores proper flow, maintaining hydraulic oil cleanliness and pump health. Operators report quieter pump operation and longer component life after switching to OEM filters. The magnetic pre-filter also provides early warning of internal wear by capturing ferrous debris.
In a fleet study of 25 XCMG GR215 graders, those using genuine 803112558 Suction Oil Filters had 80% fewer hydraulic pump failures and 50% longer oil life over 6,000 hours compared to machines with aftermarket filters. The improved filtration also reduced pump noise levels by 5 dB. For contractors who rely on hydraulic performance, an OEM suction oil filter is a critical investment.
XCMG’s filter plant uses automated welding and assembly lines to produce the 803112558 Suction Oil Filter with consistent quality. The stainless steel mesh is pleated and ultrasonically welded to the end caps. The magnet is made from rare-earth neodymium for maximum strength. The bypass valve is calibrated on a dedicated test stand to ensure it opens at exactly 0.5 bar. Each filter is 100% flow-tested and validated for burst strength (minimum 10 bar).
All 803112558 Suction Oil Filters are individually sealed in poly bags and packed in boxes of 4 or 8. Bulk orders of 16 or more are palletized. XCMG’s global distribution network ensures fast delivery to any location. For fleet operators, filter exchange programs are available to minimize inventory costs. Technical support for correct installation is available via the contact buttons above.
The 803112558 Suction Oil Filter directly replaces original part numbers 803112557 and 803112559. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This filter is used in the hydraulic tank suction line on most models. For the return oil filter, refer to part 803190287. Always verify your hydraulic system configuration before ordering.
When replacing a filter, also inspect the tank flange for damage and change the hydraulic oil if contamination is suspected. XCMG recommends replacing the suction oil filter every 1000 hours or annually, whichever comes first. Keep one spare 803112558 Suction Oil Filter in your service truck for scheduled maintenance. For fleet operators, bulk orders of 16 or more filters include a 10% discount and free shipping.
For alternative micron ratings (e.g., 60-micron for high-viscosity fluids), use the buttons above to contact our technical sales team. We can also supply filters with Viton seals for high-temperature fluids. Always provide your grader’s serial number and a photo of the existing filter when ordering the 803112558 Suction Oil Filter to ensure perfect fitment.
