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Foton Piston Connecting Rod Assembly
Foton Piston Connecting Rod Assembly
2025-07-21
Foton Timing Gear Train Assembly
Foton Timing Gear Train Assembly
2025-07-21

Foton Crankshaft Flywheel Assembly

Foton Crankshaft Flywheel Assembly
Foton Crankshaft Flywheel Assembly
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What is the Foton Crankshaft Flywheel Assembly

  • Foton Crankshaft Flywheel Assembly: The Engine’s Rotational Powerhouse
  • The Foton Crankshaft Flywheel Assembly forms the critical rotating core and energy reservoir of compatible Foton diesel engines. This precision-engineered system converts the reciprocating motion of the pistons into usable rotational power, provides inertia for smooth operation, and interfaces with starting and drivetrain components. Key elements include:
  • The Rotating Core:
  • CRANK SHAFT: The forged steel heart of the assembly. Its precisely machined main journals rotate within main BEARINGs in the engine block, while its offset connecting rod journals translate the up/down piston motion into rotation. Engine balance and smooth power delivery depend on its exact construction.
  • Inertia & Power Transfer Hub:
  • FLYWHEEL: A heavy, precisely balanced cast iron or steel disc mounted rigidly to the rear of the crankshaft. It stores rotational energy from the power strokes, smoothing out engine pulses for consistent operation. Its outer rim features the GEAR RING OF FLYWHEEL (Starter Ring Gear), which engages with the starter motor’s pinion during engine cranking.
  • Drivetrain & Accessory Drive Interface:
  • CRANKSHAFT V-BELT PULLEY: Mounted at the front end of the crankshaft (implied by “CRANKSHAFT V-BELT”), this pulley drives engine accessories (alternator, water pump, power steering pump) via one or more V-belts.
  • Key A12x60 (Woodruff Key): A semi-circular key inserted into a keyway on the crankshaft nose and matching slot in the V-belt pulley (or harmonic balancer). It positively locks the pulley to the crankshaft, preventing rotational slippage.
  • Critical Retention & Safety:
  • FLYWHEEL BOLT: High-strength bolts that clamp the flywheel securely to the crankshaft flange, transmitting massive torque. Proper torque is crucial.
  • FLYWHEEL BOLT SAFETY PIECE: A specialized lock plate or tab washer used with the flywheel bolts. After tightening, its tabs are bent against bolt heads or flywheel features to mechanically prevent bolt loosening under vibration – a vital safety measure.
  • FLYWHEEL BEARING RETAINER RING (x2): Circlips or snap rings that axially secure the pilot bearing or bushing (located in the center of the flywheel to support the transmission input shaft) within its bore. Their dual listing emphasizes the critical nature of this retention.
  • STARTING CLAW WASHER: Likely a specialized thrust washer or spacer used within the starter motor engagement mechanism or associated with the flywheel ring gear mounting, ensuring proper clearance and function during starting.
  • Function & Importance:
    This Foton crankshaft and flywheel assembly performs essential roles:
  • Power Conversion: Transforms linear piston force into rotational torque.
  • Energy Storage: The flywheel’s inertia maintains engine momentum between power strokes, ensuring smooth idle and operation.
  • Engine Starting: The flywheel ring gear engages the starter motor.
  • Drivetrain Connection: Transfers engine power to the transmission (via the flywheel/clutch interface).
  • Accessory Drive: Powers essential engine ancillaries via the V-belt pulley.
  • Vibration Damping: Careful balancing of the entire assembly minimizes harmful vibrations.
  • Key Features for Reliability:
  • Precision Forging & Machining: Ensures optimal strength, balance, and bearing surface quality for the crankshaft.
  • Robust Flywheel: Heavy-duty construction handles high torque and thermal stresses.
  • Secure Fastening: Utilizes high-tensile flywheel bolts paired with essential flywheel bolt safety pieces for absolute security.
  • Positive Drive: The Key A12x60 guarantees no slippage at the accessory drive pulley.
  • Protected Interfaces: Flywheel bearing retainer rings secure the pilot bearing, while the starting claw washer ensures reliable starter engagement.
  • Durable Ring Gear: Hardened gear ring of flywheel withstands repeated starter engagement.
  • This Foton Crankshaft Flywheel Assembly is fundamental to engine power delivery, smoothness, starting reliability, and accessory operation. Its robust design, precision components, and critical safety features ensure dependable performance and longevity under the demanding conditions faced by Foton engines.

Product Parameters of Foton Crankshaft Flywheel Assembly

No. Code Description Quantity
1 490B-05008 BOLT 1
10 490B-05001 FLYWHEEL BOLT SAFETY PIECE 3
11 490BT-05120F FLYWHEEL BEARING RETAINER RING 6
12 490BT-05120C FLYWHEEL BEARING RETAINER RING 1
2 490B-05007 STARTING CLAW WASHER 1
3 490BT-05006-1 CRANKSHAFT V-BELT 1
4 GBT1096-1979-A12X60 Key A12x60 1
5 495B-05004A CRANK SHAFT 1
7 GBT278-6204-2Z BEARING 1
8 490B-05102 GEAR RING OF FLYWHEEL 1
9 490BT-05101-2 FLYWHEEL 1

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