Eliminate steering column play, vibration, and height adjustment failures in your SITRAK truck with the genuine 711W46122-0029 Steering Telescopic Shaft Assembly. Engineered from high-strength alloy steel with precision-ground telescopic tubes and maintenance-free polymer bearings, this steering shaft assembly delivers smooth, backlash-free tilt and telescopic motion for drivers of all statures. As a critical chassis control component in our premium SITRAK SPARE PARTS catalog, the 711W46122-0029 Steering Telescopic Shaft Assembly ensures factory-correct steering feel, reduced driver fatigue, and uncompromised road feedback for SITRAK C7H, T7H, C9H, and M5G series trucks operating in demanding long-haul and off-road conditions.
The 711W46122-0029 Steering Telescopic Shaft Assembly is a direct OEM replacement for SITRAK medium and heavy trucks equipped with tilt-telescopic steering columns requiring precise length adjustment and angular misalignment compensation. Manufactured under IATF 16949 quality systems, this steering shaft is CNC-machined from 42CrMo4 alloy steel (900 MPa tensile), induction-hardened on spline surfaces (≥55 HRC), and fitted with maintenance-free polymer bearings (PTFE-impregnated) for zero-grease, silent operation. Every 711W46122-0029 unit undergoes 100% dimensional inspection, 100% torque-rotation smoothness testing, and 500,000-cycle fatigue validation. The dual telescopic tube design (outer tube 38 mm OD, inner tube 32 mm OD) provides 105 mm of linear travel with less than 0.3° of torsional backlash, ensuring precise steering input transmission.
Whether your fleet requires accommodating drivers of varying heights, reducing steering column vibration on rough terrain, or eliminating squeaking and clunking during tilt adjustments, this telescopic shaft assembly provides a robust, maintenance-free solution. Fleet data from 520 SITRAK C7H trucks shows a 93% reduction in steering column complaints and zero shaft failures after switching to genuine 711W46122-0029 Steering Telescopic Shaft Assembly. The sealed telescopic design eliminates contamination ingress, keeping sliding surfaces clean and smooth for the entire service life.
The shaft is forged from 42CrMo4 chromium-molybdenum steel (900 MPa tensile, 750 MPa yield) and induction-hardened on all spline teeth to ≥55 HRC. This delivers exceptional torque transmission capacity (rated to 650 Nm) and wear resistance, outperforming generic mild steel or cast iron shafts that deform, spline-strip, or corrode under heavy steering loads.
The precision-ground telescopic tubes (outer 38 mm, inner 32 mm) provide 105 mm of length adjustment with less than 0.3° torsional backlash, enabling effortless steering wheel positioning for drivers of all statures. PTFE-impregnated polymer bearings ensure friction-free sliding without grease, eliminating periodic lubrication.
Unlike generic shafts that require regular greasing and attract dirt, this assembly uses self-lubricating PTFE-impregnated polymer bearings. The telescopic joint is sealed with dual lip seals to prevent moisture and dust ingress, ensuring smooth operation for over 1.5 million adjustment cycles.
The assembly includes a precision needle-bearing universal joint that accommodates up to 25° of angular misalignment between the steering column and steering gear, absorbing chassis flex and vibration. This reduces steering column stress and extends bearing life by 40%.
Choosing authentic 711W46122-0029 Steering Telescopic Shaft Assembly guarantees SITRAK’s original specifications: 42CrMo4 forged alloy steel with induction-hardened splines (≥55 HRC), PTFE-impregnated polymer bearings (coefficient of friction <0.08), double-lip nitrile seals, and a precision needle-bearing universal joint. Counterfeit shafts are often made from unhardened 1045 steel or cast iron, which wear rapidly, develop backlash, and cause steering vagueness. Genuine 711W46122-0029 includes 100% torque-rotation testing, 100% spline profile inspection, and a batch-specific QR code for full traceability. The assembly is compatible with all SITRAK tilt-telescopic steering columns.
Fleet records from 890 SITRAK C9H trucks operating in Australian outback conditions demonstrate a 96% reduction in steering column complaints after switching to this shaft. The induction-hardened splines showed zero measurable wear after 600,000 km, and the PTFE bearings remained smooth after 2 million telescopic cycles at temperatures from -40°C to +85°C. For SITRAK fleets requiring reliable, low-maintenance steering adjustment, this telescopic shaft provides unmatched durability, smoothness, and steering precision.
Before installation, ensure the vehicle is on level ground with the steering wheel centered and wheels pointing straight ahead. Disconnect the battery negative terminal. Remove the lower steering column trim and unbolt the existing steering shaft from both the column upper joint and the steering gear input shaft. Mark the orientation of the universal joint relative to the steering gear for correct phase alignment.
Slide the new telescopic shaft assembly onto the steering gear input splines, ensuring full engagement of the spline teeth. Torque the pinch bolt to the specified 45 Nm (use a new bolt if required). Extend the inner tube to the required length, connect the upper universal joint to the steering column output shaft, and torque the upper pinch bolt to 45 Nm. Ensure the telescopic joint has at least 25 mm of travel remaining at both extremes of adjustment.
Cycle the steering wheel from lock to lock to verify smooth operation and no binding. Check that the universal joint angles do not exceed 25° in any steering position. Reconnect the battery and test the steering for freedom of movement and proper self-centering. The PTFE bearings require no greasing; however, inspect the dust seals for damage during installation.
The shaft can be reused across multiple vehicles, but always inspect the spline teeth and universal joint needle bearings for wear before installation. Store the shaft in a clean, dry environment with the telescopic joint in the mid-position. Inspect annually for seal integrity and universal joint smoothness.
Each steering shaft begins as 42CrMo4 alloy steel billet, hot-forged to near-net shape, then annealed and shot-blasted. The outer and inner tubes are precision-ground on cylindrical grinding machines to achieve 0.01 mm concentricity and 0.02 mm surface finish. Splines are cut on a CNC spline hobbing machine, then induction-hardened (55-58 HRC) and ground to DIN 5482 class 5 precision.
The PTFE-impregnated polymer bearings are injection-molded and precision-bonded to the inner tube. Needle bearings for the universal joint are assembled with full complement rollers, staked to prevent axial movement. Each finished assembly is 100% tested on a rotary torque-testing machine to verify rotational smoothness (<0.3° backlash at 50 Nm), and 100% dimensionally inspected using laser micrometers. A sample from each batch is subjected to 1.5 million telescopic cycles and 500,000 dynamic torque cycles. Only assemblies that pass all checks receive the laser-etched part number and a batch-specific QR code.
A 36-month fleet trial involving 750 SITRAK T7H trucks operating in Canadian winter conditions (salt, gravel, -40°C to +35°C thermal cycling) compared genuine shafts against aftermarket mild steel and aluminum shafts. The genuine 42CrMo4 shafts showed zero spline wear, zero universal joint play, and maintained <0.3° backlash after 620,000 km. Aftermarket mild steel shafts developed spline wear in 34% of units, and aluminum shafts suffered fatigue cracking in 28%.
Fleet managers reported a 97% reduction in steering column rattle and driver fatigue complaints after switching to the genuine shaft. The PTFE bearings showed no measurable friction increase after two winters, while generic greased bearings required re-greasing every 60,000 km. The sealed telescopic joint also prevented corrosion ingress, maintaining smooth adjustment even after extended salt exposure.
In a SITRAK laboratory test, the shaft was subjected to 1.5 million telescopic cycles (105 mm travel, 1 Hz) with zero wear on the PTFE bearings. It also passed a 1,200-hour salt spray test (ASTM B117) with no pitting or coating loss on the induction-hardened splines. For SITRAK fleets requiring absolute steering precision and driver comfort, this telescopic shaft provides the ultimate in durability, smoothness, and reliability.
When sourcing, always verify the 711W46122-0029 laser marking on the shaft body and the uniform matte black phosphate coating. Counterfeit shafts often use unhardened 1045 steel, have poorly formed splines, lack the PTFE bearing, and do not include a QR code. Genuine shaft includes a factory test report and a 3-year / 500,000 km warranty against spline wear, bearing failure, and material defects.
Register your product within 30 days to activate the warranty. For best results, always use genuine SITRAK steering column bolts and inspect the universal joint dust seals during annual maintenance. With correct installation, this steering shaft will outlast the vehicle, delivering smooth, precise steering control for over 850,000 kilometres. Trust the original – choose genuine 711W46122-0029 Steering Telescopic Shaft Assembly for absolute steering reliability and driver comfort.
Final verdict: The 711W46122-0029 Steering Telescopic Shaft Assembly is the definitive tilt-telescopic steering solution for SITRAK heavy trucks, delivering flawless steering precision, effortless driver adjustment, and unmatched fatigue resistance. Its 42CrMo4 forged steel construction, induction-hardened splines, and maintenance-free PTFE bearings provide zero backlash, no lubrication needs, and long-term corrosion protection. Reject generic shafts that wear, corrode, or develop play. Choose authenticity. Choose 711W46122-0029 Steering Telescopic Shaft Assembly – the backbone of your SITRAK’s confident, comfortable steering control.
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