The Shacman X5000 Flywheel with OEM number 611600020027 is a precision-machined cast iron component that stores rotational energy, dampens engine torsional vibrations, and provides a friction surface for the clutch assembly. This genuine flywheel is engineered for heavy-duty diesel engines, ensuring smooth power delivery and reliable clutch engagement. The 611600020027 flywheel is manufactured from high-grade nodular cast iron (GGG60) with induction-hardened friction surfaces, offering exceptional wear resistance and thermal stability under extreme loads.
Designed specifically for Shacman X5000 trucks (WP12, WP13, and ISM engines), the OEM flywheel features a 430 mm friction diameter, a pre-installed induction-hardened starter ring gear (53–58 HRC), and a precision-ground pilot bearing bore. The 611600020027 flywheel is dynamically balanced to ISO 1940 G2.5, eliminating driveline vibrations and reducing clutch wear. Its optimized mass provides sufficient inertia for smooth idling while allowing quick throttle response.
Aftermarket flywheels often suffer from poor balance, incorrect ring gear hardness, or friction surface runout exceeding 0.08 mm, leading to clutch chatter and premature throw-out bearing failure. Genuine 611600020027 is 100% inspected for flatness (≤0.03 mm), surface finish (Ra 0.8–1.2 µm), and hardness. The flywheel also includes accurately positioned dowel holes and bolt circles, ensuring perfect alignment with the crankshaft flange.
Choosing OEM 611600020027 guarantees long service life, reduced noise, and compliance with Shacman factory specifications. This flywheel is a critical component for any clutch replacement or engine overhaul, providing the rotational stability that Shacman X5000 heavy-duty trucks demand.
The flywheel is subjected to extreme centrifugal forces and thermal cycling. A cracked or warped flywheel can shatter, causing catastrophic damage to the bell housing and clutch. OEM 611600020027 is cast from nodular iron with spheroidal graphite, providing high tensile strength (600 MPa min) and excellent fatigue resistance. The friction surface is hardened to prevent heat checking under heavy clutch slipping.
Aftermarket flywheels often use gray cast iron (low strength) or have poor casting quality, leading to cracks emanating from the bolt holes. Genuine 611600020027 is X-ray inspected for internal porosity and stress-relieved before machining. The ring gear is induction-welded and hardened, eliminating the risk of teeth stripping during cold starts. This flywheel also features a corrosion-resistant phosphate coating.
Before installation, clean the crankshaft flange and flywheel mounting surface. Remove any oil or old Loctite. Inspect the pilot bearing bore for damage. Install a new pilot bearing using a press. Align the flywheel dowel pins and install new flywheel bolts (grade 12.9) with thread locker. Torque bolts in three stages: 80 Nm, then 150 Nm, then final 200 Nm + 90° angle.
After bolting, measure friction surface runout using a dial indicator. Maximum allowable is 0.10 mm. If exceeded, inspect the crankshaft flange. For Shacman X5000, always replace the flywheel when replacing the clutch to avoid uneven wear. Do not resurface a flywheel beyond the minimum thickness of 42 mm.
Each 611600020027 flywheel casting is produced via automated disamatic molding. After shakeout, it is normalized to relieve residual stresses. CNC turning and grinding achieve tight tolerances. The ring gear is induction-welded, then surface hardening is verified by eddy current. Dynamic balancing is performed on a Schenck machine, with correction holes drilled as needed.
100% of flywheels undergo magnetic particle inspection for cracks, especially around bolt holes and the ring gear joint. A sample from each batch is burst-tested to 5,500 rpm. The genuine 611600020027 has no recorded failures in over 1 million units produced.
OEM 611600020027 replaces Shacman part numbers 611600020026, 612600010076, and DZ13241808014. It is fully compatible with Shacman X5000 trucks equipped with WP12, WP13, and ISM engines, as well as X3000 and X6000 series with manual transmissions. This flywheel works with 430 mm single-plate clutches (e.g., Shacman 430D, 430S).
For trucks with automatic transmissions, a flexplate adapter is required. When replacing, always use new bolts and pilot bearing. Never mix flywheel bolts from different batches. For fleets, stocking the 611600020027 flywheel ensures rapid clutch replacement without waiting for part delivery.
Shacman’s durability testing includes 1,000 hours of engine dyno cycling (full load to overrun) with a temperature range of -30°C to +120°C. The flywheel shows no measurable runout increase. A separate thermal shock test involves heating the friction surface to 400°C then cooling with water – repeated 100 times – with no cracking.
In fleet trials across 300 trucks, the 611600020027 flywheel achieved an average life of 1,200,000 km before requiring replacement due to ring gear wear or friction surface glazing. This is twice the life of typical aftermarket flywheels. By choosing OEM, you reduce total cost of ownership and maximize vehicle uptime.
