7C-9997 damper hub CAT motor grader spare part

7C-9997 damper hub CAT motor grader spare part Featured Image
  • 7C-9997 damper hub CAT motor grader spare part
  • 7C-9997 damper hub CAT motor grader spare part

Short Description:

Part No.243-2249, CAT new rubber torsional crankshaft damper pulley, integrated damper and multi-groove pulley. It fits C18 heavy-duty diesel engine, reduces crankshaft torsional vibration for large mining trucks, wheel loaders and generator sets.


Product Detail

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description

This 7C-9997 is alloy steel hub for CAT 3306 damper. It serves as the core base of torsional damper. Bore fits crankshaft nose, outer surface bonds with rubber layer and inertia ring. Torque transfers from crankshaft to hub, while rubber absorbs vibration. Each hub is quenched and tempered, crack inspected, precision machined to control runout. It is matched with 7E-6200 damper group, widely used on 12H,140H,160H grader and 3306 engine overhaul.

Part No.：7C-9997
Name：CAT Crankshaft Damper Hub
Material：Gray (Flake) Iron
Fit engine：3306
Matching assembly：7E-6200 damper group
Process：Brand new OEM, heat treatment, MPI inspection, precision machining, runout test
Mounting position：Front crankshaft, inner core of damper

Advantages

1. OEM forged blank, precise bore tolerance for stable fit on crank nose
2. Heat treated alloy steel, high torsion fatigue resistance under cyclic heavy load
3. Optimized surface texture for rubber bonding, reduce delamination risk
4. Dedicated dimension for 7E-6200, direct replacement without modification

FAQ 

Q1：Can 7C-9997 interchange with other damper hubs?
A：No. Bore size, bolt pattern and outer bonding profile are dedicated for 3306 and 7E-6200.
Q2：Is this a Reman part?
A：No. It is brand new forged steel OEM hub.
Q3：What faults will be caused by damaged hub?
A：Rubber delamination and slip, damper failure, engine shake and premature crank nose wear.
Q4：Can I reuse the hub if rubber is aged but hub looks intact?
A：Reuse is allowed after MPI inspection. Re-sulfurization is acceptable if no crack or scoring.

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