The genuine XCMG 273100564 Worm Gear is a high‑precision power transmission component engineered for motor grader circle rotation systems, steering gearboxes, and blade pitch mechanisms. This OEM 273100564 worm gear is manufactured from case‑hardened alloy steel with ground tooth profiles, ensuring smooth, backlash‑free motion control and excellent wear resistance under heavy grading loads.
The 273100564 worm gear pairs with a matching worm shaft to convert rotational motion into precise angular positioning. In XCMG GR series graders, this component enables accurate blade circle rotation, articulation steering, and moldboard tilt adjustments. Constructed to exact factory tolerances, the XCMG 273100564 worm gear eliminates play in the circle drive, reducing vibration and improving grade quality.
Worn or pitted worm gears cause erratic circle movement, steering free play, and accelerated wear of mating components. Replacing a damaged gear with genuine XCMG 273100564 restores original control precision and extends the service life of your grader’s critical adjustment systems.
| Parameter | Specification |
|---|---|
| OEM Number | 273100564 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Worm Gear – Circle Drive / Steering Gearbox |
| Module (Metric) | 4.0 |
| Number of Teeth | 39 |
| Outer Diameter | 164 mm ±0.1 mm |
| Root Diameter | 144 mm ±0.1 mm |
| Face Width | 42 mm |
| Hub Bore Diameter | 55 mm (with keyway 14×9 mm) |
| Material | Case‑hardened alloy steel (20MnCr5 / SAE 8620) |
| Heat Treatment | Carburizing + quenching + tempering |
| Surface Hardness | 58‑62 HRC (case depth 0.8‑1.2 mm) |
| Core Hardness | 28‑35 HRC |
| Tooth Profile Accuracy | DIN 3974 Grade 6 (ground finish) |
| Lead Angle (Worm Gear) | 21°48′ (matching worm shaft multi‑start) |
| Maximum Torque Capacity | 1800 Nm (continuous) / 2800 Nm (peak) |
| Operating Temperature | -30°C to +110°C (with EP lubricant) |
| Lubrication | SAE 80W‑90 or XCMG worm drive oil |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 273100401, 273100511, 273100678 |
The XCMG 273100564 worm gear is the heart of the grader’s circle drive mechanism. It transmits torque from the hydraulic motor or manual adjustment crank to the circle drawbar, enabling 360° blade rotation with high holding torque.
In steering systems, the worm gear provides smooth, progressive steering feel without backlash. A worn 273100564 gear creates excessive play, causing the blade to drift during grading and reducing operator control.
This worm gear also appears in moldboard tilt actuators and articulation joint locks. When clearances exceed factory limits, replace with genuine 273100564 to eliminate slack and restore predictable machine response.
Each 273100564 worm gear starts as a forged alloy steel blank. The gear is rough‑cut using CNC hobbling, then case‑hardened in a carburizing furnace to achieve a wear‑resistant outer layer while retaining a tough ductile core.
After heat treatment, the teeth are precision ground using Reishauer gear grinding technology, achieving DIN 3974 Grade 6 accuracy. This eliminates transmission error and noise. The bore is finish‑honed to a tolerance of H7 for a perfect fit on the shaft.
Magnetic particle inspection verifies crack‑free tooth roots. Each batch of 273100564 gears is tested on a double‑flank gear roll checker to ensure consistent tooth thickness and runout below 0.03 mm.
Before removing the worn worm gear, drain the lubricant and remove the circle drive housing or steering gearbox cover. Use a hydraulic puller to extract the gear from its tapered or straight‑bore shaft. Inspect the mating worm shaft for pitting or wear.
Clean the shaft and bore with solvent. Apply a light film of assembly oil to the new 273100564 worm gear bore. Press the gear onto the shaft using a shop press, ensuring the key aligns with the keyway. Do not hammer the gear into place.
Adjust worm endplay and gear mesh according to the service manual. Typical backlash should be between 0.10 and 0.20 mm. Fill the housing with fresh XCMG worm drive oil and cycle the circle rotation several times to distribute lubricant.
Common indicators include: excessive free play in blade circle rotation (more than 10 mm measured at the blade tip), clunking or ratcheting noise when turning the steering wheel, and metal particles in the gearbox oil.
Another symptom is “self‑steering” where blade angle drifts under load. If you detect uneven tooth wear or deep pitting on the gear face, immediate replacement with genuine 273100564 is critical to avoid damage to the worm shaft and bearings.
XCMG recommends inspecting the circle drive worm gear every 2,000 operating hours or whenever blade positioning becomes imprecise. The 273100564 worm gear should be replaced at 6,000‑hour intervals for standard road grading applications.
For graders used in heavy ripping or continuous cross‑slope work, shorter replacement cycles (4,000‑5,000 hours) are advised. Always replace the matching worm shaft simultaneously to ensure proper tooth contact and load distribution.
Use only XCMG‑approved EP gear oil with extreme pressure additives. Change the oil every 1,000 hours or annually. Contaminated oil accelerates wear on the 273100564 worm gear teeth. Keep vent plugs clean to prevent moisture ingress.
Every genuine XCMG 273100564 worm gear is backed by a 12‑month warranty against material and manufacturing defects. Regional parts warehouses in Houston, Rotterdam, Dubai, and Shanghai maintain deep stocks of this critical wear component.
Standard air freight delivers the 273100564 gear to most global destinations within 3‑5 business days. Emergency express shipping (24‑48 hours) is available for mission‑critical repairs. Bulk orders receive discounted pricing and sea freight options.
Do not compromise with generic aftermarket worm gears that use inferior materials and unground teeth. Only the genuine XCMG 273100564 ensures proper hardness, accurate geometry, and long‑term reliability. Order the original part today and keep your motor grader’s circle drive and steering systems operating with factory precision.
The XCMG 273100564 worm gear is a small component with a massive impact on grade accuracy, steering response, and uptime. Invest in genuine OEM quality to avoid premature failure and costly field repairs. Keep a spare 273100564 gear in your parts inventory and replace proactively. Experience the difference of true XCMG engineering – smooth, quiet, and built to last thousands of hours under the most demanding conditions.
Upgrade your motor grader’s circle drive and steering reliability with the genuine XCMG 273100564 worm gear. Precision ground, case‑hardened, and 100% factory tested – order now and maintain the performance that keeps your grader productive on every job site.
