The 804000620 Hood Lift Cylinder is a genuine XCMG gas spring cylinder designed for motor grader engine hoods. This cylinder provides controlled lifting and smooth holding of the heavy hood, allowing safe access to the engine compartment. The 804000620 hood lift cylinder is manufactured from high-strength steel tubing with a durable chrome-plated piston rod. It ensures reliable operation even after thousands of cycles, preventing sudden hood drops that could cause injury or damage.
The 804000620 Hood Lift Cylinder features a sealed nitrogen gas charge that provides consistent lift force throughout its travel range. The cylinder has a force of 600N (135 lbf) at full extension, which is perfectly matched to the weight of XCMG GR series hoods. The ends are fitted with precision-machined ball studs for easy attachment to the hood brackets. As a genuine OEM component, it replaces worn or weak gas springs that no longer hold the hood open safely.
Engineered for durability, the 804000620 Hood Lift Cylinder has a corrosion-resistant black e-coat finish on the body and a zinc-plated ball stud. The internal seals are made of low-temperature rubber that remains flexible down to -40°C. The cylinder is filled with high-purity nitrogen and tested for leakage at 1.5x working pressure. Using genuine XCMG cylinders ensures that the hood stays open in windy conditions and closes smoothly without slamming.
| Parameter | Specification |
|---|---|
| OEM Number | 804000620 |
| Product Name | Hood Lift Cylinder (Gas Spring) |
| Brand | XCMG (Genuine OEM) |
| Cylinder Type | Nitrogen gas-charged, double-acting lockable |
| Body Material | Seamless steel tube, e-coat finish |
| Piston Rod | Hard chrome-plated steel, 10mm diameter |
| Extended Length (center to center) | 520 mm (±2 mm) |
| Compressed Length (center to center) | 330 mm (±2 mm) |
| Stroke | 190 mm |
| Lift Force (at full extension) | 600 N ±10% (135 lbf) |
| Locking Feature | Internal mechanical lock at full extension |
| End Fittings | 10mm ball studs with retaining clips (both ends) |
| Temperature Range | -40°C to +80°C |
| Gas Fill | High-purity nitrogen, pressure 150 bar |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited cycles |
Aftermarket gas springs often use lower-quality seals and lose pressure quickly. The genuine 804000620 Hood Lift Cylinder from XCMG is manufactured to ISO 21943 standards, with an expected service life of 50,000 cycles. The internal lock mechanism is precision-machined to hold the hood securely even in strong winds. Independent tests show that OEM cylinders retain 95% of their original force after 5 years of use, compared to 60% for generic units.
Each 804000620 Hood Lift Cylinder is 100% tested for force, stroke, and leak rate before packaging. The cylinder body is stamped with the XCMG logo and date code for traceability. XCMG’s quality management system includes random destructive testing to verify the weld integrity of the ball studs. This ensures that the cylinder will not fail suddenly, protecting technicians working under the hood.
Installing the 804000620 Hood Lift Cylinder is straightforward. Support the hood with a prop rod before removing the old cylinder. Use a flat screwdriver to pry off the retaining clips on the ball studs. Install the new cylinder by snapping the ball studs into the brackets and securing with new retaining clips. Test the hood by lifting it fully; it should stay open without sagging. Close the hood to check for smooth damping near the end of travel.
Inspect the 804000620 Hood Lift Cylinder every 1,000 hours for signs of oil leakage or reduced lifting force. If the hood feels heavy to lift or drifts down slowly, replace the cylinder immediately. Do not attempt to recharge or repair gas springs; they are sealed units under high pressure. Keep a spare cylinder in your parts locker, as sudden failure can make engine access difficult and unsafe.
A failing hood lift cylinder forces mechanics to prop the hood with makeshift supports, creating safety hazards. Replacing with the genuine 804000620 Hood Lift Cylinder restores one-hand operation and ensures the hood stays fully open during service. This improves maintenance efficiency and reduces the risk of head injuries. Operators also appreciate the smooth closing action that prevents slamming and paint damage.
In a survey of XCMG GR215 owners, those who used genuine 804000620 Hood Lift Cylinders reported 80% fewer hood-related service interruptions. The consistent lift force also prevents hood misalignment, which can cause gaps that allow dust into the engine bay. For contractors who value technician safety and machine uptime, OEM hood cylinders are a small investment with big returns.
XCMG’s gas spring production line uses automated filling stations that control nitrogen pressure to within ±2%. The 804000620 Hood Lift Cylinder body is welded by robotic arms, ensuring consistent penetration without burn-through. After assembly, each cylinder undergoes a 24-hour pressure decay test to verify seal integrity. The final step is a force-displacement curve test to confirm smooth operation throughout the stroke.
All 804000620 Hood Lift Cylinders are packed in individual foam-lined boxes to prevent rod damage. Bulk orders of 10 or more come in a master carton with dividers. XCMG’s global warehouse network ensures fast shipping to dealers and fleet operators worldwide. For emergency replacements, expedited air freight is available.
The 804000620 Hood Lift Cylinder directly replaces original part numbers 804000619 and 804000621. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This cylinder is used on both left and right sides of the hood (two cylinders per machine). For older GR models (pre-2010), verify the mounting bracket spacing before ordering. For GR550 models, use part 804000622.
When replacing hood lift cylinders, always replace both units as a set to ensure balanced lift. Order two 804000620 cylinders plus the retaining clip kit (part 804000623). XCMG recommends lubricating the ball studs with silicone grease annually to prevent squeaking. Store spare cylinders horizontally in a cool environment; avoid exposing them to welding splatter or extreme heat.
For custom force requirements (e.g., heavier hoods with insulation or auxiliary lights), use the buttons above to contact our engineering support team. We can supply cylinders with 700N or 500N force as special orders. Always provide your grader’s serial number when ordering the 804000620 Hood Lift Cylinder to ensure correct fitment.
