Ensure precise crankshaft end‑play control and protect your engine from costly axial wear with the 612600013917 Upper Thrust Plate. This critical component works in tandem with the lower thrust washer to maintain correct crankshaft position, absorbing axial loads generated by the clutch and torque converter. As a vital part of genuine Howo/Sitrak truck parts, the 612600013917 is engineered to exact OEM standards, guaranteeing a perfect fit and superior wear resistance in HOWO, Sitrak, and compatible heavy‑duty diesel engines. Whether you are performing a bottom‑end overhaul or replacing worn thrust components, this plate delivers the strength and precision necessary to maintain crankshaft alignment, reduce friction, and extend engine service life, minimizing downtime and repair costs.
The 612600013917 is not a simple washer; it is a precision‑machined thrust face engineered to withstand substantial axial loads while maintaining minimal friction. Manufactured from high‑strength alloy steel with a specialized wear‑resistant coating, this plate provides a durable bearing surface for the crankshaft thrust collar. The surface finish is precisely controlled to ensure optimal oil film retention, reducing metal‑to‑metal contact and preventing premature wear. The plate’s geometry—including its thickness, outer diameter, and locating features—is replicated to exact OEM specifications, ensuring correct end‑play clearance and proper engagement with the lower thrust washer.
High Axial Load Capacity – The 612600013917 is designed to absorb the thrust loads generated by clutch engagement and torque converter oil pressure, protecting the crankshaft and main bearings.
Optimized Lubrication – The precision‑ground surface promotes oil film formation, reducing friction and heat generation between the plate and the crankshaft thrust collar.
Wear Resistance – The specialized surface treatment provides exceptional resistance to adhesive and abrasive wear, ensuring long‑term performance even under severe duty cycles.
Precision Thickness – Machined to tight dimensional tolerances, the 612600013917 guarantees correct end‑play adjustment, critical for proper crankshaft operation.
The 612600013917 upper thrust plate is manufactured to the exact dimensions required for the main bearing housings of HOWO, Sitrak, and Shacman heavy‑duty engines. It is specifically compatible with the widely used WP10, WP12, and WP13 series, as well as the earlier WD615 family. Its locating tangs and bolt hole pattern match the engine block precisely, ensuring easy installation and correct orientation. By choosing this OEM‑grade component, you avoid the risks associated with aftermarket plates that may have incorrect thickness or poor surface finish, which can lead to excessive end‑play, crankshaft damage, or bearing failure.
The 612600013917 has been validated through extensive dynamometer and field testing, confirming its ability to maintain consistent crankshaft end‑play over thousands of operating hours. Fleets that have standardized on this plate report fewer thrust bearing failures and reduced clutch‑related issues, translating into lower maintenance costs and improved vehicle uptime. Its robust packaging ensures that the precision surfaces remain protected until installation.
Installing the 612600013917 correctly is essential for achieving the proper crankshaft end‑play and ensuring long engine life. Begin by thoroughly cleaning the upper main bearing saddle and the thrust plate locating recess in the engine block. Inspect the crankshaft thrust collar for any scoring or uneven wear; if defects are found, the crankshaft may need to be repaired or replaced. Lubricate the bearing surface of the thrust plate with clean engine oil or assembly lube. Place the 612600013917 into its recess, ensuring the locating tang engages securely. Install the main bearing cap with the lower thrust washer (if applicable) and torque the cap bolts to the manufacturer’s specified value.
After assembly, measure the crankshaft end‑play using a dial indicator, with the crank pushed fully forward and rearward. The correct end‑play for most HOWO engines is typically between 0.08 and 0.25 mm (0.003–0.010 in). If the end‑play is outside this range, verify that the correct thickness of thrust plate has been installed. The 612600013917 is available in standard and oversize grades to accommodate different block/crankshaft combinations. Always consult the engine service manual for the specific clearance specification. With correct installation, the 612600013917 will provide reliable axial control for the life of the engine.
Each 612600013917 upper thrust plate is manufactured in an IATF 16949‑certified facility, following strict process controls from raw material to finished product. The steel alloy is tested for chemical composition and hardness prior to machining. CNC machining ensures that the plate’s thickness, outer diameter, and tang dimensions are held to micron‑level tolerances. The bearing face is precision‑ground to a controlled surface roughness, and the part is deburred to eliminate any sharp edges that could cause stress risers.
A 100% inspection is performed on critical dimensions, including thickness and flatness. Random samples from each batch are subjected to hardness testing, surface roughness measurement, and visual inspection under magnification. We also conduct a simulated installation check to verify correct fitment in a master block. This rigorous quality regimen ensures that every 612600013917 delivers the same reliable performance as the original OEM component, giving you complete confidence in your engine rebuild.
Engine rebuilders and fleet maintenance teams consistently choose the 612600013917 because it delivers dependable thrust control and eliminates end‑play related failures. The plate’s consistent thickness and high‑quality surface finish reduce the need for selective fitting, saving time during assembly. Many workshops have reported that using this plate eliminates the common problem of rapid thrust wear caused by inferior aftermarket parts, significantly extending the interval between overhauls.
Moreover, the 612600013917 is available in multiple oversize grades to accommodate block reconditioning, providing flexibility for rebuilders. Its sturdy packaging protects the precision surfaces, and the clear part numbering simplifies inventory management. When you choose this thrust plate, you are selecting a component that has been engineered to the highest standards, offering the perfect balance of strength, precision, and reliability.
In summary, the 612600013917 Upper Thrust Plate is a precision‑engineered component that plays a critical role in maintaining crankshaft axial position and protecting your engine from costly thrust‑related failures. Its robust alloy construction, precision machining, and rigorous quality control ensure that it delivers consistent performance over hundreds of thousands of miles. By investing in this genuine OEM‑grade part, you are safeguarding your crankshaft, main bearings, and connecting rods from excessive wear and potential catastrophic damage.
Don’t compromise on bottom‑end integrity – choose the 612600013917 for your next rebuild. With its proven track record in the field and widespread adoption by leading fleets and rebuilders, this thrust plate is the smart choice for anyone who values reliability, durability, and peace of mind. Keep your crankshaft precisely positioned and your engine running smoothly with the 612600013917 – the definitive choice for HOWO and Sitrak professionals.
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