The genuine XCMG 800106923 Gear is a precision‑cut, high‑strength transmission gear manufactured for XCMG GR series motor graders. This OEM gear is used in the main transmission, final drive, and circle rotation drive systems, where it transmits power efficiently while withstanding extreme shock loads and continuous operation. Manufactured from case‑hardened alloy steel (SAE 8620) with carburized and ground teeth, the 800106923 gear delivers exceptional wear resistance, fatigue life, and dimensional stability under the high torque and abrasive conditions typical of road grading, ripping, and snow removal.
The 800106923 gear features precision‑generated involute teeth with a nominal module of 4.0, pressure angle of 20°, and an overall diameter of 180 mm. The gear is hobbed and then profile‑ground to AGMA Q10 quality, ensuring quiet operation and uniform load distribution. The tooth flanks are induction‑hardened to 55–60 HRC, while the core remains tough at 35–40 HRC to absorb impact loads. The gear includes a precision‑broached internal spline for mounting onto the shaft. This component is a direct replacement for worn or broken gears on GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders.
A worn, chipped, or pitted gear causes increased noise, vibration, irregular motion, and eventual drivetrain failure. Replacing a damaged gear with genuine XCMG 800106923 restores original tooth geometry, eliminates backlash, and ensures smooth, reliable power transmission. Keep this gear in your parts inventory for transmission or final drive overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 800106923 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Spur / Helical Drive Gear – Transmission / Final Drive |
| Number of Teeth | 45 teeth (±0.5 modified) |
| Module (Metric) | 4.0 mm (DIN 780) |
| Pressure Angle | 20° (full depth involute) |
| Pitch Diameter | 180.00 mm (±0.03 mm) |
| Face Width | 45.0 mm (±0.1 mm) |
| Overall Diameter (tip) | 196.0 mm (±0.15 mm) |
| Material | Case‑carburizing steel (SAE 8620 / 20CrMoH) |
| Heat Treatment | Carburize + harden + temper; effective case depth 1.0–1.4 mm |
| Surface Hardness (teeth) | 55–60 HRC |
| Core Hardness | 35–40 HRC |
| Gear Quality Grade | AGMA Q10 / DIN 3962 class 6 |
| Tooth Profile Grinding | Profile and lead ground (Ra ≤0.4 μm) |
| Internal Spline | Involute, 20 teeth, module 1.5, 30° pressure angle |
| Max Torque Capacity | 3,800 Nm (2,800 lb‑ft) continuous |
| Operating Temperature Range | -40°C to +140°C (-40°F to +284°F) |
| Lubrication | Pressurized oil splash (ATF or gear oil) |
| Standards Compliance | ISO 9001, AGMA 2000, XCMG Q/XCMG 1132-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 800106800, 800106900, 800106922 |
The 800106923 gear is a key component in the grader’s powershift transmission or final drive. It meshes with a mating pinion or gear to transfer torque from the engine to the wheels, enabling the selection of different speed ranges.
In the circle rotation drive, this gear (or a similar one) turns the blade circle, allowing the operator to adjust blade angle precisely. A worn gear tooth will cause chatter, uneven motion, and accelerated wear of the mating gear.
The carburized case and hardened tooth flanks provide high resistance to pitting and scuffing, essential for long life in oil‑bath environments. The ground tooth profile ensures quiet operation and high efficiency.
Replacing a damaged gear with genuine XCMG 800106923 restores original gear mesh, reduces noise, and prevents further damage to the bearing and housing.
XCMG selects SAE 8620 low‑alloy steel for its excellent case‑hardenability and toughness. The gear blank is forged to refine the grain structure, then normalized to relieve stress.
The teeth are hobbed on a CNC gear hobbing machine, then gas‑carburized at 925°C, followed by direct hardening and tempering. This produces a hard, wear‑resistant case and a tough, ductile core.
After heat treatment, the gear teeth are profile‑ground on a Reishauer grinder to AGMA Q10 quality, removing the inevitable distortion from hardening. The finish grinding results in a mirror‑like surface (Ra ≤0.4 μm) that reduces friction and noise.
Each gear is 100% inspected for tooth flank geometry, lead, and pitch error on a CNC gear measuring center. Random samples are also tested for hardness and case depth. Genuine XCMG gears consistently exceed AGMA quality requirements.
When replacing the 800106923 gear, inspect the mating gear and bearings. If the mating gear is worn or chipped, replace it together with the new gear – mismatched worn gears will cause noise and short life.
Clean the shaft and gear bore thoroughly. Heat the gear in an oil bath to 80–100°C before mounting to avoid scoring the shaft. Use a press to install the gear, ensuring it seats squarely against the shoulder.
Measure the backlash between the new gear and its mating gear using a dial indicator. The recommended backlash is 0.15–0.30 mm. If out of specification, adjust by moving the gear axially or by using adjustable shims.
After assembly, run the transmission at low speed and listen for abnormal noise. If the gear whines excessively, the backlash or alignment may need correction. Keep spare 800106923 gears in your shop for transmission or circle drive overhauls.
Aftermarket gears are often made from lower‑grade steel (e.g., 1045) with only superficial hardening, causing rapid tooth wear and pitting within 1,000 hours. Many have poor tooth geometry, generating excessive noise and vibration.
Counterfeit gears may have incorrect spline dimensions, leading to a loose fit that causes fretting and shaft damage. Some are not ground after hardening, leaving rough tooth flanks that accelerate wear of the mating gear.
Genuine XCMG gears are 100% inspected for tooth quality and hardness. XCMG provides a 12‑month warranty against manufacturing defects. Using OEM gears ensures correct backlash, quiet operation, and extended transmission life. The cost of a genuine gear is a fraction of the cost of a failed transmission rebuild.
Audible signs: whining or howling noise that changes with speed, clunking during gear shifts, or a constant grinding sound. Visual signs: chipped or missing teeth, pitting on tooth flanks, and visible wear step on the tooth profile.
Preventive replacement is recommended every 5,000 operating hours or during any major transmission or final drive overhaul. Even if the gear looks intact, the case may have micro‑cracks from fatigue, and the tooth flanks may have lost their hardened layer.
Keep a stock of 800106923 gears in your fleet warehouse. When rebuilding a transmission, always replace all gears in the affected cluster – mixing old gears with new ones can cause uneven load distribution and premature failure. Proactive replacement prevents sudden transmission failure and expensive downtime.
The XCMG 800106923 Gear is stocked in regional hubs: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide.
Expedited courier (DHL/FedEx) provides 1–2 day shipping for urgent transmission repairs. Bulk orders of 5+ gears receive volume discounts and can be shipped by sea freight. Each gear is individually packed in a foam‑lined crate with rust‑inhibiting paper.
For large fleets, consignment stock programs ensure immediate availability. Our parts specialists can provide gear installation instructions and backlash specifications. Technical datasheets and mounting videos are available upon request.
Don’t let a worn gear ruin your grader’s transmission or circle drive. Order the genuine XCMG 800106923 Gear today and restore smooth, quiet, and reliable power transfer in your motor grader.
Upgrade your grader’s drivetrain reliability with XCMG genuine gears. Engineered for high hardness, precision tooth geometry, and long service life. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader transmitting power with confidence – choose 800106923 OEM gear.
