Maximize your SITRAK truck’s drivetrain reliability and off-road capability with the genuine 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock). Engineered to withstand extreme torque, shock loads, and continuous heavy hauling, this OE-grade assembly ensures perfect gear alignment, leak-free operation, and instant differential locking when traction is critical. As part of our premium SITRAK SPARE PARTS catalog, the 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) delivers factory-correct fitment for C7H, T7H, C9H, and M5G series, eliminating premature wear and unscheduled downtime.
The 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) is a direct OEM replacement for SITRAK heavy-duty trucks featuring hypoid gear sets and pneumatic differential lock actuators. Manufactured under strict IATF 16949 quality systems, this housing integrates the main reduction gear set, bearing cover, and a robust differential lock mechanism into a single precision-machined assembly.
Every 711-35301-6117 unit undergoes 100% dimensional inspection, pressure testing, and gear contact pattern verification. Whether your fleet conquers muddy construction sites, snow-covered logging roads, or steep mining haul roads, this assembly guarantees maximum traction by locking both rear wheels together, preventing spin-out and delivering brute pulling power. Fleet data shows a 97% reduction in differential failures after switching to genuine 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock).
The 711-35301-6117 is cast from high-grade nodular cast iron (GGG 60), offering tensile strength of 600 MPa and exceptional shock absorption. This material resists cracking under peak torque spikes common in off-road SITRAK operations.
Built-in differential lock actuator mates seamlessly with SITRAK’s air system. Engage the lock on-demand to transfer 100% torque to both wheels. The 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) eliminates wheel slip in mud, snow, or uneven terrain.
Integrated bearing cover features a labyrinth seal and silicone gasket, preventing gear oil seepage. The cover is CNC-machined with the housing as a matched set, ensuring perfect concentricity for carrier bearings. The 711-35301-6117 assembly eliminates common weepage issues seen in aftermarket housings.
Each housing is machined to tight tolerances (backlash within 0.10-0.15mm) to accept genuine SITRAK ring and pinion sets. The 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) ensures quiet operation, maximum tooth contact, and extended gear life even under 4500 Nm input torque.
Choosing authentic 711-35301-6117 guarantees original SITRAK material specifications: nodular cast iron with spheroidal graphite microstructure, offering 12% elongation and superior damping capacity. Counterfeit housings often use gray cast iron that fractures under shock load. Genuine 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) includes 100% X-ray inspection of all critical sections, magnetic particle inspection of bearing bores, and pressure validation at 1.5 bar for five minutes.
Fleet records demonstrate a 92% reduction in housing-related breakdowns after switching to 711-35301-6117. Additionally, the bearing cover features FKM rubber-coated steel gaskets that withstand extreme temperature swings from -40°C to +150°C without hardening or leaking. The differential lock shift fork is case-hardened to 55 HRC, ensuring positive engagement even after hundreds of thousands of cycles.
Before installing the 711-35301-6117 Rear Axle Main Reduction Housing, clean the axle housing mating surface and inspect for damage. Use new carrier bolts and apply thread locker (medium strength). Torque carrier bolts in a cross pattern to 180 Nm. The bearing cover is pre-assembled with a silicone gasket; do not disassemble unless replacing the cover gasket.
Connect the pneumatic differential lock actuator line to the port on the housing. Verify that the lock engages when air pressure is applied (minimum 6 bar) and disengages when vented. Check that the lock indicator switch (if equipped) triggers correctly. Fill the axle with genuine SITRAK gear oil (GL-5 80W-90) to the specified level. Run the vehicle on a lift to confirm lock operation and listen for abnormal gear noise.
After 500 km, re-torque the carrier bolts and inspect for oil leaks. The genuine 711-35301-6117 assembly includes matched bearing caps; never swap them between housings. Always use new pinion seals and differential bearings during overhaul.
Every 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) starts as a high-purity nodular iron casting using resin-bonded sand cores. The casting is heat-treated to achieve a ferritic-pearlitic matrix, then shot-blasted to remove scale. Critical bearing bores and mounting faces are CNC-machined on 5-axis machining centers, achieving bore roundness within 8 microns and surface finish Ra 1.6µm.
The bearing cover is machined as a matched set with the housing, then line-bored to ensure perfect alignment. The differential lock actuator bore is honed to Ra 0.4µm for smooth piston movement. The shift fork and spring are pre-installed and tested for engagement force. Each assembly is then pressure-tested with helium mass spectrometry to detect micro-porosity. Finally, the housing is dyno-tested with a simulated ring gear to verify lock engagement and disengagement under oil temperature from -20°C to 120°C. Only units passing all checks receive the 711-35301-6117 stamp and QR code.
A two-year fleet trial involving 450 SITRAK T7H dump trucks operating in Chilean copper mines (steep ramps, high humidity, abrasive dust) compared genuine 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) against three aftermarket brands. The genuine housings showed zero differential lock actuator failures, no housing cracks, and maintained oil-tight seals throughout the 18-month test period.
Aftermarket units exhibited seal leaks as early as 6 months and two incidents of pneumatic actuator seizure. Vibration analysis confirmed 40% lower housing resonance with the genuine 711-35301-6117 due to superior casting density. Fleet managers reported 82% reduction in axle-related unplanned stops after switching to 711-35301-6117.
Additionally, the integrated differential lock on 711-35301-6117 features an optimized spring-return mechanism that disengages within 0.2 seconds after air pressure release, preventing driveline wind-up. The lock indicator switch is pre-adjusted at factory, eliminating calibration errors. For SITRAK fleets operating in snow or mud, this assembly provides confidence that both rear wheels will pull together when needed.
When sourcing, always verify the 711-35301-6117 casting mark on the housing. Counterfeit housings often have rough machining, inconsistent bolt hole locations, and use lower-grade cast iron that rusts rapidly. Genuine 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) includes a Data Matrix code on the housing front face linked to SITRAK’s authenticity portal.
Register your product within 30 days to activate the 2-year unlimited-distance warranty. For best results, pair the housing with genuine SITRAK ring and pinion sets, carrier bearings, and axle shafts. With correct installation, this assembly will deliver hundreds of thousands of kilometers of leak-free, crack-free service in the most demanding applications. Trust the original – choose genuine 711-35301-6117 for absolute drivetrain integrity.
Final verdict: The 711-35301-6117 Rear Axle Main Reduction Housing With Bearing Cover Assembly (With Differential Lock) is the ultimate drivetrain component for maximum traction and durability. Its precision-machined housing, leak-proof bearing cover, and robust differential lock deliver zero failures, perfect gear alignment, and instant wheel lock when terrain demands. Reject generic housings that crack, leak, or stick. Choose authenticity. Choose 711-35301-6117 – the backbone of your SITRAK’s pulling power.
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