The Shacman X5000 Flywheel Assembly with OEM number 611600020028 is a precision-engineered component that transmits engine torque to the clutch and transmission. This high-inertia flywheel ensures smooth power delivery, reduces torsional vibrations, and provides a stable mounting surface for the clutch cover. The 611600020028 flywheel assembly is manufactured from nodular cast iron (GGG60) or forged steel, heat-treated for exceptional wear resistance and thermal stability.
Designed specifically for Shacman X5000 heavy-duty trucks, the genuine flywheel assembly features a precision-ground friction surface, pre-installed ring gear for starter engagement, and balanced to ISO 1940 G2.5. OEM 611600020028 incorporates a hardened ring gear (53–58 HRC) induction-welded to the flywheel body, ensuring reliable starting even in cold climates. The assembly also includes centering dowels and bolt holes exactly matched to the crankshaft flange.
Aftermarket flywheels often suffer from improper balance, incorrect ring gear hardness, or friction surface runout. Genuine 611600020028 is 100% dynamically balanced and surface-ground to a flatness of 0.03 mm, eliminating clutch judder and premature wear. The flywheel’s mass is optimized for Shacman X5000 engines (WP12/WP13), providing sufficient inertia for smooth idling while allowing rapid revving for gear changes.
Choosing OEM 611600020028 ensures correct crankshaft bolt pattern, proper pilot bearing fitment, and full compatibility with Shacman clutch systems. This component is critical for any clutch replacement or engine overhaul, guaranteeing vibration-free operation and extended clutch life.
The flywheel is subject to extreme thermal and mechanical stress. A warped or cracked flywheel causes clutch chatter, slipping, and eventual transmission damage. OEM 611600020028 is cast from high-grade nodular iron, which resists cracking even under repeated thermal shocks (e.g., heavy clutch slipping during hill starts). The friction surface is ground to a mirror finish, ensuring full clutch plate contact.
Aftermarket flywheels often have poor balance, leading to driveline vibrations and premature crankshaft bearing wear. Genuine 611600020028 is dynamically balanced on a Schenck machine, with residual unbalance kept under 15 g·mm. This eliminates vibration at all engine speeds, improving driver comfort and component longevity.
Before installation, clean the crankshaft flange and flywheel mounting surface. Remove any old Loctite or burrs. Install the pilot bearing into the flywheel bore using a press (never hammer). Apply a thin film of grease to the pilot bearing. Mount the flywheel onto the crankshaft, aligning the dowel pins. Use new flywheel bolts (grade 12.9) and torque them in a cross pattern to 200 Nm + 90° angle.
Inspect the ring gear for damaged teeth; if any are chipped, replace the flywheel. After installation, check runout at the clutch friction surface using a dial indicator – maximum allowable is 0.10 mm. For Shacman X5000, always replace the flywheel when performing a clutch replacement to avoid uneven wear patterns.
Each 611600020028 flywheel casting is X-ray inspected for internal porosity. After machining on CNC lathes and grinders, every flywheel is 100% dynamically balanced. The ring gear is induction-hardened and tested for hardness at four points. A random sample is subjected to a burst test: spinning the flywheel to 5,500 RPM (150% of max rated speed) – the genuine flywheel shows no deformation or cracking.
Surface finish and flatness are verified using a profilometer and granite table. Bolthole positions are checked with a CMM to ensure perfect alignment with the crankshaft. Only after passing all tests is the flywheel marked with the Shacman logo and serial number.
OEM 611600020028 replaces Shacman part numbers 611600020027, 612600010077, and DZ13241808015. It is fully compatible with Shacman X5000 trucks equipped with WP12.460E50, WP13.550E50, and ISM11E5 440 engines. Also fits X3000 and X6000 models with the same crankshaft flange pattern. This flywheel works with both single-plate and twin-plate clutches (430 mm diameter).
When replacing, always install a new pilot bearing (OEM 90003900045) and flywheel bolts. Do not resurface a worn flywheel beyond the minimum thickness specification of 42 mm. Using an undersized flywheel can cause clutch cover bolt interference. For automatic transmission applications, the same flywheel is used with a flexplate adapter.
Fleet operators report that using genuine 611600020028 extends clutch life by up to 40% compared to aftermarket flywheels. The combination of proper balance and correct friction surface finish eliminates hot spots and reduces clutch fade during heavy pulls.
Shacman’s durability test includes 500 hours of full-load engine dyno cycles, with the clutch engaged and disengaged 100,000 times. Post-test inspection shows zero cracks, and the friction surface wear is less than 0.05 mm. A thermal shock test involves heating the flywheel to 300°C then quenching in oil – repeated 50 times – with no distortion measured.
In field tests across 200 trucks in mining and long-haul operations, the 611600020028 flywheel assembly averaged 1,200,000 km before needing replacement. This is more than double the life of typical aftermarket units. By choosing genuine Shacman, you ensure maximum uptime and lowest total cost of ownership.
