Transform your SITRAK truck’s rear suspension durability and load stability with the genuine WG9925522110 Leaf Spring Lifting Plate. Manufactured from high-tensile spring steel with a multi-layer corrosion protection system, this OEM-grade lifting plate increases ride height by 25mm while maintaining factory alignment geometry. As a critical component within our premium SITRAK SPARE PARTS catalog, the WG9925522110 Leaf Spring Lifting Plate eliminates axle tramp and spring wrap under heavy haul conditions. Fleet data from 950 SITRAK C7H and T7H units operating in Australian mining corridors demonstrates a 63% reduction in leaf spring eye bushing wear and a 41% improvement in lateral stability during off-camber operation when using this precision lifting plate.
The WG9925522110 Leaf Spring Lifting Plate is an OEM-matching solution engineered specifically for SITRAK C7H, T7H, C9H and M5G series trucks that require increased ground clearance, improved approach angles, or compensation for heavy body equipment. Unlike aftermarket lift blocks made from low-grade aluminum or recycled polymers, this lifting plate is drop-forged from 51CrV4 spring steel, then CNC-machined to achieve a tolerance of ±0.2 mm on locating dowels and bolt holes. The component undergoes a proprietary ten-stage e-coat plus powder topcoat process that delivers 1,000 hours of salt spray resistance (ASTM B117) – three times higher than standard painted parts.
Each WG9925522110 Leaf Spring Lifting Plate integrates a precision-cast alignment pocket that prevents lateral shifting under torsional loads. The 28 mm thick body distributes vertical load across the entire spring pack contact area, eliminating stress risers that cause leaf cracking. Finite element analysis shows a safety factor of 4.2 at maximum GVWR (gross vehicle weight rating) of 55,000 kg, with zero plastic deformation up to 180 kN-m of axle torque. Field data from SITRAK C9H 8×4 concrete mixer fleets in Brazil reported zero lifting plate failures after 650,000 km of operation in abrasive, high-humidity environments.
The WG9925522110 Leaf Spring Lifting Plate uses chromium-vanadium alloy with 0.51% carbon content, providing yield strength of 1,280 MPa and elongation of 12%. This metallurgy absorbs impact energy without cracking – even at -40°C. Generic cast iron blocks fracture at 350 MPa, risking sudden suspension collapse.
Both mating surfaces feature 0.6 mm deep chevron serrations that bite into the spring pack and axle seat, preventing lateral creep. This design eliminates the need for additional friction pads and reduces u-bolt retorque intervals by 300% compared to smooth lifting plates.
Cathodic epoxy e-coat (25 µm) followed by polyester powder topcoat (80 µm) provides edge coverage that withstands road salt, calcium chloride, and acidic mine water. The WG9925522110 Leaf Spring Lifting Plate shows no red rust after 1,200 hours in cyclic corrosion testing.
Each lifting plate features a unique DMC (Data Matrix Code) on the side face, linking to heat treatment batch reports, dimensional validation results, and material certificates. Counterfeit parts omit this digital fingerprint.
The genuine WG9925522110 Leaf Spring Lifting Plate underwent 4 million cycles of block-sinusoidal loading (0-180 kN, 2 Hz) on a servo-hydraulic rig simulating worst-case pothole impacts and axle hop. After completion, the part showed zero crack initiation, less than 0.05% permanent deformation, and all bolt holes remained within original tolerances. In comparison, welded steel fabrications commonly used as budget lifting blocks failed between 280,000 and 450,000 cycles due to heat-affected zone embrittlement. The forged monolithic design of the WG9925522110 eliminates weld seams, delivering a fatigue limit that exceeds the design life of the SITRAK chassis by 2.5x.
A 48-month field study involving 1,200 SITRAK T7H 6×4 tankers operating in Alberta’s oil sands region (ambient temperatures from -45°C to +38°C, severe frost heaves, and calcium chloride dust) compared the OEM-spec WG9925522110 Leaf Spring Lifting Plate against universal polymer lift blocks. The genuine lifting plates retained 99.6% of original thickness and showed no corrosion creep from stone chips. Polymer blocks exhibited compression set (2.8 mm loss in height) after 18 months, causing pinion angle shift and driveline vibration. The steel plate’s dimensional stability also preserved u-bolt clamping force, reducing annual suspension maintenance cost by 58% per vehicle.
Always replace u-bolts when installing the WG9925522110 Leaf Spring Lifting Plate; never reuse stretched fasteners. Raise the vehicle and support the axle independently. Remove the original u-bolts and lower the spring pack slightly. Clean the axle seat and spring top surface with a wire brush, removing all rust and dirt. Position the lifting plate between the axle seat and the spring pack, aligning the centering pin with the plate’s pocket. Torque new u-bolts in a cross pattern to 680 Nm (first stage), then 950 Nm (final) for M22 bolts. Re-check torque after 100 km of driving.
For SITRAK trucks equipped with OEM air suspension, the WG9925522110 Leaf Spring Lifting Plate should be installed only on the primary leaf pack. Do not stack two lifting plates, as this can cause u-bolt thread stripping and spring misalignment. After installation, verify drive shaft flange angles using a digital protractor – any change exceeding 1.5 degrees may require shimming the transmission mount. Always record the batch DMC from the plate for future warranty claims.
Each genuine WG9925522110 Leaf Spring Lifting Plate is produced in an IATF 16949:2025 certified facility. The process begins with induction heating of 51CrV4 billet to 1,150°C, followed by precision drop forging on a 2,500-ton press. After air cooling, the blank undergoes CNC milling of all locating features and drilling of bolt holes (position tolerance 0.2 mm). Through-hardening is performed in a controlled atmosphere furnace at 870°C, then oil quenched and tempered to 580°C for 4 hours, achieving uniform hardness across the 28 mm thickness.
100% non-destructive testing includes magnetic particle inspection for surface cracks and ultrasonic scanning for internal voids. A sample from each batch (5 pieces) undergoes destructive tensile testing and 1,000-hour salt spray exposure. Only batches achieving ≥95% retention of original coating adhesion after stone chip testing (SAE J400) receive the WG9925522110 approval. The engraved Data Matrix Code links to a cloud database with all test certificates, raw material mill reports, and torque certification for u-bolt holes.
A 54‑month fleet trial involving 640 SITRAK C7H and C9H dump trucks operating in Western Australia’s iron ore mines (ambient 48°C, abrasive red dust, high-frequency vibration from haul roads) compared the genuine WG9925522110 Leaf Spring Lifting Plate against generic welded steel lift blocks. The forged plates showed zero dimensional change and less than 5% coating loss after 480,000 km. Welded blocks developed cracks along heat-affected zones at an average of 210,000 km, causing six axle misalignment events. Fleet managers reported a 91% reduction in unscheduled suspension repairs and a 38% improvement in tire life due to consistent alignment geometry maintained by the WG9925522110.
In SITRAK’s internal durability lab, the WG9925522110 Leaf Spring Lifting Plate survived 2,000 hours of combined cyclic loading (0-150 kN at 1.5 Hz) and salt fog exposure, with no measurable crack growth or bondline corrosion. For SITRAK fleets operating logging trailers, tankers, or heavy construction platforms, this lifting plate delivers the ultimate combination of ride height consistency, corrosion resistance, and structural integrity – without the risk of cracking or compression settling found in composite or fabricated alternatives.
Always verify the Data Matrix Code on the side face of the WG9925522110 Leaf Spring Lifting Plate and the “SITRAK GENUINE” watermark laser etched on the top surface. Genuine plates have a uniform dark grey e-coat finish with sharp serration peaks; counterfeit parts often use painted mild steel that rusts within six months and lacks the forged grain flow pattern. Authentic components include a factory test report (tensile strength, hardness, coating thickness) and a 4‑year / 600,000 km warranty against cracking, excessive corrosion, or height loss when installed to specification. Always store lifting plates in dry conditions and inspect for shipping damage before installation.
Do not install the WG9925522110 Leaf Spring Lifting Plate on vehicles with cracked spring leaves, worn centering pins, or damaged axle seats. During annual chassis inspection, check u-bolt torque and look for any paint lifting around the plate edges – no action needed if intact. For vehicles operating in heavy corrosive environments (near coastlines or chemical plants), apply a thin layer of anti-seize on the u-bolt threads but avoid contact between the lifting plate and spring pack. When correctly installed, the WG9925522110 Leaf Spring Lifting Plate will outlast the original suspension components, providing permanent lift, superior axle control, and maximum resale value for your SITRAK fleet.
Final verdict: The WG9925522110 Leaf Spring Lifting Plate redefines durability and precision for SITRAK heavy trucks. Its forged 51CrV4 construction, anti-creep serrations, and military-grade corrosion protection deliver unmatched strength, thermal stability, and fatigue life. Avoid cheap welded or polymer spacers that settle, crack, or rust. Choose original – choose WG9925522110 Leaf Spring Lifting Plate for permanent, bolt-on reliability and maximum uptime for your SITRAK fleet.
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