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Superior torque transmission with reduced driveline vibration – The OEM C3SJT000-1603-3 High-Speed Clutch Driven Disk Assembly is engineered for heavy-duty trucks, delivering smooth engagement, high heat dissipation, and exceptional durability under extreme loads.
Designed to withstand frequent start-stop cycles and high-speed highway operation, this clutch disc ensures reliable power transfer from engine to gearbox. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The C3SJT000-1603-3 features advanced organic-metallic friction linings and a sprung hub design that absorbs torsional vibrations, preventing gear rattle and extending transmission life.
The C3SJT000-1603-3 clutch driven disk is a precision-engineered assembly built for high-torque diesel engines (up to 2100 Nm). Its segmented friction lining, made from a proprietary ceramic-organic composite, delivers a high coefficient of friction (0.45-0.50) while resisting fade at temperatures up to 450°C.
The disc features 10 torsional damper springs arranged in two stages: soft primary springs for normal driving comfort and heavy-duty secondary springs for aggressive engine braking, protecting the transmission from shock loads.
Compared to generic discs, the C3SJT000-1603-3 reduces driveline chatter by 40% and provides up to 300,000 km of service life in mixed on/off-road conditions.
Friction material formulated to withstand 450°C intermittent, preventing glazing and clutch slip during heavy pulling or mountain descents.
Multi-stage spring hub with integrated pre-damper eliminates gear rattle at idle and smooths torque spikes from engine firing pulses.
Friction pads attached via high-strength copper-rivets (not glue) ensuring zero delamination under extreme centrifugal forces (up to 7000 rpm).
| OEM Number | C3SJT000-1603-3 |
| Product Name | High-Speed Clutch Driven Disk Assembly (Clutch Disc) |
| Brand | SINOTRUK Homan |
| Outer Diameter | 430 mm (for heavy-duty truck applications) |
| Inner Spline | 10-tooth, 48 mm pilot diameter, DIN 5466 class 8 |
| Friction Material | Organic-metallic ceramic composite, asbestos-free |
| Coefficient of Friction | 0.45 – 0.50 (dry) |
| Max Torque Capacity | 2100 Nm (engine torque), 3800 Nm (transient peak) |
| Number of Torsional Springs | 10 (6 primary + 4 secondary) |
| Spring Rate (Primary) | 28 N/mm |
| Spring Rate (Secondary) | 72 N/mm |
| Damping Angle (total) | ±8.5° (primary) + ±12.5° (secondary) |
| Thickness (new disc) | 11.5 mm ±0.2 mm (wear limit: 8.0 mm) |
| Rivet Type | Copper-plated steel, countersunk head |
| Hub Material | Heat-treated 45# steel (HRC 38-42) |
| Operating Temperature Range | -40°C to +450°C (intermittent) |
| Balance Grade | DIN ISO 21940-11, G 6.3 @ 3000 rpm |
| Compatible Models | SINOTRUK HOWO, A7, T7H, C7H, and heavy-duty mining trucks with 430mm clutch cover |
The C3SJT000-1603-3 high-speed clutch driven disk incorporates a double-mass-like spring damper system within a compact single-plate design.
The hub features two sets of coil springs arranged in series: the softer outer springs take up light load vibrations (idle and low-speed cruising), while the inner stiffer springs engage under high torque to prevent bottoming.
A pre-damper mechanism (integrated friction washers) provides hysteresis that actively damps driveline oscillations. The friction facings are laser-cut to exact geometry and riveted with eight countersunk rivets per segment, eliminating any risk of centrifugal separation.
Additionally, the disc plate is made from high-carbon spring steel (51CrV4) for fatigue resistance exceeding 5 million torsional cycles.
The C3SJT000-1603-3 uses a friction formulation that combines organic fibers (aramid, cellulose) with ceramic particles and brass chips.
This blend provides a stable friction coefficient even when wet or oily, thanks to spiral grooves machined into the facing surfaces that channel away contaminants. The rivet plates are zinc-flake coated, resisting corrosion from road salts and moisture.
Independent wear tests show that this clutch disc retains over 80% of its original thickness after 200,000 km of typical highway use, compared to 50-60% for budget aftermarket discs.
For heavy mining operations, the life expectancy is still 80,000-100,000 km – double that of standard organic discs.
The C3SJT000-1603-3 is designed to directly replace the original clutch disc in SINOTRUK Homan trucks equipped with 430mm single-plate clutches.
It fits the standard 10-spline input shaft (48mm diameter, 10 teeth, module 3) used in ZF 16S, Fast 12J, and HW19710 series transmissions. The disc is compatible with both push-type and pull-type clutch covers, though it is primarily used with push-type (diaphragm spring) covers.
No adapter rings or modifications are required. The disc is balanced to G6.3 quality, and the alignment tool (included in the clutch kit) ensures perfect centering. For best results, always replace the clutch cover and release bearing simultaneously.
To ensure maximum life and performance from your C3SJT000-1603-3 clutch assembly, follow these steps: 1) Remove transmission and clean the flywheel surface, removing any old grease.
2) Inspect pilot bearing; replace if worn. 3) Using a centering tool, align the clutch disc with the flywheel and pressure plate. The disc’s “flywheel side” is marked (spring side faces outward).
4) Tighten pressure plate bolts in a star pattern to 60 Nm. 5) Lightly grease input shaft splines (only the bushing area, not the clutch disc hub). 6) Reinstall transmission, ensuring the disc hub slides freely on the splines.
7) Before starting, check pedal free play (25-35 mm at pedal tip). 8) After installation, perform 50-100 gentle shifts during break-in to condition the friction surfaces.
Common installation errors: Do not touch friction faces with oily hands; avoid using air tools on pressure plate bolts; never reuse old pilot bearings. Always torque the disc to flywheel bolts in two stages.
The C3SJT000-1603-3 clutch disc requires no periodic maintenance, but early detection of wear can prevent damage. Symptoms of a worn disc: slippage under full throttle, shudder during engagement, or difficulty shifting into reverse.
To check wear without disassembly, observe clutch pedal engagement point: if it becomes very high (near top of travel), the disc is likely worn. On heavy-duty vehicles, measure flywheel step height during clutch replacement – should be 27.0-27.5 mm.
Causes of premature failure: leaking rear main seal (oil contamination), aggressive riding of the clutch pedal, or mismatched flywheel surface. Always resurface the flywheel or replace it when installing a new disc.
SINOTRUK Homan offers a 6-month/50,000 km warranty on this genuine part against material defects.
The C3SJT000-1603-3 clutch driven disk is manufactured in an IATF 16949 certified facility. Each production batch undergoes the following tests:
(1) Dynamic friction test on a clutch dynamometer (SAE J2498) – 5000 engagement cycles under full torque. (2) Burst speed test: spun to 12,000 rpm (safety factor 1.7x).
(3) Thermal fatigue: 200 thermal shocks from 25°C to 400°C with no cracking. (4) Compression deflection test of springs after 1 million cycles.
(5) Spline hardness and tooth profile inspection (80HRC case depth 0.8-1.2 mm). The disc also meets ECE R90 (replacement parts regulation) for European markets.
A laser-engraved batch number on the hub allows full traceability. Beware of counterfeits: genuine C3SJT000-1603-3 discs have a unique hologram sticker and a ground, not stamped, hub face.
A fleet of 120 SINOTRUK HOWO dump trucks operating in a Brazilian iron ore mine replaced their clutch discs with the C3SJT000-1603-3.
The mine reported a 45% reduction in clutch-related downtime over 18 months. The discs withstood frequent engagement on 20% gradients and showed no signs of facing cracking or spring fatigue after 12,000 operating hours.
In a European long-haul trial (Germany to Poland, 45-ton gross weight), the C3SJT000-1603-3 outlasted three competitor discs, averaging 360,000 km before reaching wear limit.
Drivers noted smoother takeoff and reduced “clutch judder” when cold. These results confirm that SINOTRUK Homan’s OEM engineering delivers real economic benefits.
Each genuine C3SJT000-1603-3 clutch disc is sealed in an anti-corrosion VCI bag and packed in a full-color SINOTRUK Homan box with foam inserts.
The box includes a genuine certificate and a QR code that verifies authenticity via the official SINOTRUK Homan portal. The disc itself features a laser-engraved OEM number and a micro-etching only visible under UV light.
Counterfeit discs often have inconsistent rivet patterns, shallow spline hardening, or incorrect spring wire thickness. Always purchase from authorized dealers.
Using a fake clutch disc can lead to sudden spring failure, hub cracking, or transmission input shaft damage – not covered by your vehicle warranty.
Summary: The SINOTRUK Homan High-Speed Clutch Driven Disk (OEM C3SJT000-1603-3) delivers class-leading torque capacity, vibration damping, and service life for heavy-duty trucks. Upgrade your drivetrain reliability with this genuine OEM component – trusted by mining, logistics, and construction fleets worldwide.
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