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Product Advantage
Product Description
This factory‑equivalent tension pulley assembly is installed on the harvester’s header feeding transmission system. Its core function is to maintain constant, proper tension for the feeder drive belt while the machine works in the field. It absorbs vibration caused by uneven load, prevents belt slackening, slipping, jumping off and premature burning, ensuring steady crop delivery from the header into the threshing unit.
The wheel body is made of high‑strength ductile cast iron, cast as one piece and stress‑relieved to resist deformation under heavy shock and continuous vibration. The integrated heavy‑duty sealed bearing assembly is pre‑lubricated and tightly sealed against dust, chaff, mud and moisture from farm fields, greatly extending service life under harsh harvesting conditions. All mounting holes and shaft dimensions strictly match OEM specifications. Direct bolt‑on replacement, no cutting, welding or modification required.
When your old tension pulley suffers from worn‑out bearings, wobbling wheel, cracked rim or seized rotation, the drive belt will slip, lose power, heat up rapidly and wear fast. Worse still, unstable feeding may cause crop blockages inside the harvester. Replacing this tension pulley assy before harvest is a cost‑effective way to protect your whole feeding system and maximize your working hours in peak season.
Suitable for farm maintenance workshops, agricultural machinery dealers, large grain farms and rental fleets stocking WORLD harvester spare parts. Bulk wholesale is available for distributors.
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Maintain appropriate tension on the drive belt or chain to prevent the belt from slipping, jumping, or loosening. | Ensure the stable operation of the crop, straw, cutting piece conveyor chain or belt during the operation of the cutting/feeding components. | Reduce vibration, extend the lifespan of transmission components, and prevent downtime due to malfunctions. | In the working environment (dust, mud, debris, strong vibration), the reliability of the tensioning wheel component affects the overall equipment efficiency. |
Technical Parameters
| ITEMS | DESCRIPTION |
| Name | Tension pulley assy |
| Code | W5.0-03X-27-00 |
| Weight | 9KGS |
| Size(mm) | Φ:280 φ:70 |
✅ OEM Part Number: W5.0-03X-27-00
✅ Exact fit for WORLD Ruilong 4LZ‑6.0P (102HP) combine harvester
✅ One‑piece ductile cast iron wheel body, shock‑resistant & anti‑deformation
✅ Pre‑installed sealed heavy‑load bearing unit, dustproof & mud‑resistant
✅ Maintains stable belt tension, stops slipping, jumping and belt burning
✅ Reduces feeding blockage risk, protects expensive drive belts
✅ Direct replacement, simple bolt‑on installation
✅ Strict dimension inspection before shipment
Product Uses
This W5.0-03X-27-00 tension pulley assembly serves the header feeding transmission of WORLD combine harvesters.
Wheat, rice, barley harvesting: Keeps feeder belt tension stable under variable crop loads, guarantees continuous crop feeding into threshing drum.
Long‑hour continuous field operation: Works under dusty environment, straw debris, mud bumps and strong vibration during peak harvest.
Routine preventive maintenance: Replace worn pulleys pre‑season to avoid mid‑harvest breakdowns.
Emergency field repair: Quick swap when old pulley bearing fails or the wheel cracks.
Spare‑part inventory: Ideal stock item for agri‑parts dealers, repair shops and harvester rental companies.
Product Operate Guide
Before installing the tension pulley assy, inspect the component for any signs of damage, such as cracks, worn bearings, or deformed rims. Check the mounting surface on the harvester to ensure it is flat and free of debris. Verify that all bolts and fasteners are in good condition and compatible with the assembly.
Align the tension pulley assy with the mounting points on the harvester’s header or feeding system. Secure the assembly using the recommended bolts, tightening them to the specified torque to ensure a stable fit. Adjust the tension arm to the correct position, ensuring the pulley maintains appropriate tension on the belt or chain without over-tightening.
Regularly clean the area surrounding the tension pulley to remove soil, dust, and crop residues. Use a soft brush or compressed air to clear debris from the bearing and wheel surface, preventing buildup that can cause friction or jamming. Inspect the pulley for signs of wear during each maintenance cycle, paying attention to the wheel surface and bearing performance.
Replace the tension pulley assy when bearings are severely worn, the wheel surface shows deep grooves, or belts frequently slip. If the adjustment arm has reached its limit and cannot maintain proper tension, a replacement is necessary to avoid damage to the harvester’s transmission system. Always use genuine FM WORLD harvester parts for replacements to ensure compatibility and performance.
Q1: Which harvester models does this tension pulley fit?
A1: Designed for WORLD Ruilong PLUS 4LZ‑6.0P /102HP combine harvester, part number W5.0-03X-27-00. Please double‑check your original part number before ordering for compatibility.
Q2: Is it original OEM part?
A2: High‑quality aftermarket replacement assembly. Dimensions, material and bearing specifications match OEM standard. Ready to install directly without modification.
Q3: What are the typical failure signs of a bad tension pulley?
A3: Visible pulley wobble, noisy bearing, rough rotation, cracked cast rim, belt slipping, hot or burnt belt, frequent feeding blockages. Replace it immediately once these symptoms show.
Q4: Can I replace only the bearing instead of the whole assembly?
A4: You may try bearing replacement, but if the cast wheel has wear, out‑of‑round deformation or cracks, you still need the full assembly. Buying the complete pre‑assembled unit saves your field repair time.
Q5: How long will this tension pulley last?
A5: Service life depends on working conditions and cleaning/maintenance frequency. Frequent work in muddy, high‑chaff fields accelerates wear. Regularly clear wrapped straw around the pulley for longer service life.
Q6: Do you support bulk wholesale for dealers?
A6: Yes, we offer competitive bulk pricing for agricultural machinery distributors. Contact us to get wholesale quotation and lead time.
Q7: Any installation tips?
A7: After mounting, adjust belt tension to the manufacturer’s recommended range. Check belt alignment. If your drive belt is already heavily worn, replace the belt together with the tension pulley for best performance.
Product Video
