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Got it! You're looking for damper details for the Caterpillar Cat 120H Motor Grader. The damper (often called the engine damper or torsional vibration damper) is a key component in reducing vibrations from the engine, protecting crankshaft and connected systems.

🛠️ Caterpillar 120H Motor Grader – Damper Details 🔧 1. Part Name

• Torsional Vibration Damper
  Also referred to as: Crankshaft Damper, Harmonic Balancer

📋 2. Function

• Absorbs and dampens vibrations caused by engine combustion cycles.

• Protects the crankshaft, bearings, and engine accessories from torsional stress.

• Helps maintain engine smoothness and extends component life.

⚙️ 3. Location

• Mounted on the front of the crankshaft (engine timing gear area)

• Bolted directly to the crankshaft nose, often integrated with the pulley assembly

🔍 4. Compatible Engine Model

• Caterpillar 3304 Turbocharged Diesel Engine
  This is the stock engine used in the Cat 120H.

🔢 5. Common Part Numbers

(Note: Always verify via serial number or engine arrangement number.)

🧰 6. Signs of a Faulty Damper

• Unusual engine vibration

• Noisy front-end (rattling or humming)

• Visible cracks or rubber separation on the damper

• Engine belt issues or misalignment

📦 7. Packaging & Handling

• Usually shipped in a foam-padded box or anti-vibration crate

• Requires handling with care — avoid dropping or exposing to heat

• Sealed in plastic or rust-inhibitor wrap for export

🧾 8. Replacement Notes

• Must be torqued to spec using a calibrated torque wrench

• Always replace with new bolts if specified by the manual

• Inspect crankshaft nose and keyway for wear before reinstallation

 

The Grader Circle Pinion with OEM part number 4583868 is a critical component in the final drive system of Caterpillar motor graders, including models such as the 120K, 120M, 12M, 140K, 140M, and 160M series. This pinion gear facilitates the rotation of the blade, allowing precise grading and leveling operations

🔧 Specifications

• Part Number: 4583868

• Description: Pinion-Circle Drive

• Material: Special alloy steel

• Dimensions:

  • Height: 90 mm

  • Outer Diameter: 175 mm

  • Number of Teeth: 6

• Weight: Approximately 5.8 kg

• Applications: Caterpillar motor graders including 120K, 120M, 12M, 140K, 140M, 160M series

• OEM Manufacturer: Caterpillar

The travel motor is essentially the hydraulic motor interfaces with the final drive, providing the power that the final drive transforms into torque. ... By this definition, the final drive is primarily the planetary gear system that converts power to torqu

The final drive (also called final reduction drive or travel drive) is a critical component in the undercarriage of tracked machines like bulldozers. It transmits power from the travel motor to the sprockets, driving the tracks and enabling the machine’s movement.

Role and Importance

• Power Transmission: Converts hydraulic motor torque into rotational force to drive tracks.

• Torque Multiplication: Reduces speed and increases torque to the track sprockets.

• Load Bearing: Supports part of the machine's weight and absorbs shocks.

• Sealing: Keeps lubricant inside and contaminants out to ensure longevity.

Final Drive Specifications for CAT D9T & D9R