The genuine XCMG 800370326 Output Shaft is a precision‑engineered drivetrain component manufactured for XCMG GR series motor graders. This OEM output shaft transfers rotational power from the transmission to the final drive, ultimately driving the tandem axles and wheels. Made from high‑strength alloy steel (42CrMo4) with induction‑hardened bearing journals and precision‑ground splines, the 800370326 output shaft withstands high torsional loads and shock impacts encountered during heavy grading operations.
The 800370326 shaft features multiple splined ends (for mating with transmission internal gears and pinion flange) and precision ground bearing seats. Dynamic balancing to ISO 1940 G6.3 ensures vibration‑free operation up to 2,500 rpm. The material is through‑hardened to 38–42 HRC, with induction hardening on splines and journals reaching 55–60 HRC. This dual‑hardness design provides torsional toughness while offering excellent wear resistance.
Applications on XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders include the main transmission output area, transfer case output, and differential input connections. A twisted or cracked output shaft causes loss of drive, abnormal vibration, and catastrophic drivetrain failure. Replacing a damaged shaft with genuine XCMG 800370326 restores original power flow and ensures reliable machine operation.
| Parameter | Specification |
|---|---|
| OEM Number | 800370326 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Transmission Output Shaft / Final Drive Input Shaft |
| Overall Length | 385 mm (±0.3 mm) |
| Shaft Diameter (main body) | 45.00 mm h6 tolerance |
| Spline Type – Transmission Side | Involute spline, 22 teeth, module 2.0, 30° pressure angle |
| Spline Type – Final Drive Side | Involute spline, 28 teeth, module 2.0, 30° pressure angle |
| Bearing Journal Diameters | 40.00 mm and 35.00 mm, both P6 tolerance |
| Material | Alloy steel (42CrMo4 / AISI 4140), forged blank |
| Core Hardness | 38–42 HRC (through‑hardened & tempered) |
| Surface Hardness (journals & splines) | 55–60 HRC (induction hardened, case depth 1.2–1.8 mm) |
| Dynamic Balance Grade | ISO 1940 G6.3 @ 2,500 rpm |
| Maximum Torque Capacity | 3,200 Nm (2,360 lb‑ft) continuous |
| Maximum Rotational Speed | 2,800 rpm |
| Surface Finish (journals) | Ra ≤0.4 μm (ground & superfinished) |
| Lubrication | Pressurized oil (transmission fluid) |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1138-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 800369001, 800370100, 800370225, 800370310 |
The 800370326 output shaft is the final link in the grader’s transmission before power reaches the wheels. It receives torque from the transmission’s output planetary or gear set and transmits it to the pinion shaft of the final drive. Any failure of this shaft results in complete loss of motion and immediate downtime.
On XCMG GR graders, this shaft is subjected to extreme shock loads when the blade hits rocks or during ripping operations. The induction‑hardened splines are designed to resist fretting wear, while the ground journals support heavy‑duty tapered roller bearings that absorb radial and thrust forces. Proper lubrication and alignment are critical for long life.
Common failure modes include torsional fatigue cracks starting at the spline root, journal scoring due to lubrication loss, and spline wear from misalignment. Replacing a damaged shaft with genuine XCMG 800370326 restores original clearances and ensures reliable power transfer. Always keep a spare output shaft for rapid transmission overhaul.
XCMG selects 42CrMo4 chromium‑molybdenum steel for its outstanding hardenability and toughness. The blank is hot‑forged to refine grain flow lines, then normalized to relieve internal stresses. CNC turning and spline hobbing follow DIN 5480 standards, ensuring perfect spline engagement with original gears.
Through‑hardening at 850°C oil quenching followed by tempering at 560°C produces a uniform core hardness of 38–42 HRC. Induction hardening then selectively heats the splines and journal zones to 900°C, followed by rapid quenching, achieving surface hardness of 55–60 HRC to a depth of 1.5 mm.
This combination provides a tough core that absorbs shock loads without fracture and a hard, wear‑resistant surface that maintains spline dimensions under high torque. After hardening, the journals are centerless ground to h6 tolerance and superfinished to Ra 0.2 μm. Each shaft is 100% magnaflux inspected for surface cracks.
Before installing a new 800370326 output shaft, drain the transmission oil and remove the PTO cover. Disconnect the final drive coupling and support the housing. Use a puller to extract the old shaft – never hammer it out. Inspect the housing bore for scoring and replace bearings if worn.
Lubricate the splines and journals with clean transmission fluid. Carefully insert the new shaft, aligning the splines with the internal gear. Rotate the shaft slightly to engage. Install new snap rings and thrust washers. Torque the retaining bolt (if present) to 180 Nm (133 lb‑ft).
Check end‑play with a dial gauge – acceptable range is 0.05–0.15 mm. Adjust shims if needed. After reassembly, fill with approved oil, run the engine at idle, and inspect for leaks or noise. Keep spare 800370326 shafts in your central parts store to support emergency field repairs.
Aftermarket output shafts often use lower‑grade 1045 steel without induction hardening, causing spline wear within 1,000 hours. Many have incorrect spline geometry, leading to premature gear and coupler failure. Genuine XCMG 800370326 uses induction‑hardened 42CrMo4 for long spline life and precise fit.
Counterfeit shafts may lack dynamic balancing, causing vibration that destroys bearings and seals in the transmission and final drive. Some have journal diameters out of tolerance (oversized or undersized), resulting in either loose fit (shaft whip) or interference fit that seizes bearings. Genuine parts are precision ground and balanced to factory specifications.
XCMG provides a 12‑month unlimited‑hour warranty. Each genuine shaft is laser‑etched with the 800370326 part number and production lot code. Using OEM components protects your grader’s transmission and final drive – the cost of an aftermarket failure far exceeds the price of a genuine shaft.
Common symptoms of a failing output shaft: vibration that increases with ground speed, metallic grinding noise from the transmission or final drive, metal particles in the magnetic drain plug, and intermittent loss of drive under load. Also, oil leaks from the shaft seal area indicate bearing wear, which may precede shaft damage.
Preventive replacement is recommended every 5,000 operating hours or during any major transmission rebuild. The cost of a genuine shaft is negligible compared to the damage caused by a snapped shaft – which can destroy the transmission housing and final drive (over USD 15,000). During every 1,000‑hour service, inspect the output area for leaks and unusual noise.
Keep a stock of 800370326 shafts in your fleet warehouse. When replacing bearings or seals in the output housing, always install a new shaft – the old one may have micro‑cracks from torsional fatigue even if visually acceptable. A proactive replacement strategy minimizes unplanned downtime and extends grader life.
The XCMG 800370326 Output Shaft is stocked in strategic regional hubs: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days to most international destinations. Express courier (DHL/FedEx) provides 1–2 day delivery for urgent repairs.
Bulk orders of 3+ shafts receive volume discounts and can be shipped via sea freight. Each shaft is individually wrapped in VCI paper and foam‑lined heavy‑duty cartons to prevent rust and damage. For large fleets and mining contractors, consignment stock programs ensure immediate availability at your workshop.
Don’t let a broken output shaft shut down your grader. Order the genuine XCMG 800370326 Output Shaft today and ensure reliable power delivery to the wheels. This component is the heart of your grader’s drivetrain – only OEM quality guarantees dependable performance.
Upgrade your grader’s powertrain reliability with XCMG genuine output shafts. Engineered for torsional strength, precise spline geometry, and vibration‑free operation. Use the buttons above to request a quote or email our parts specialists. Choose 800370326 OEM for lasting durability.
