216-7921 Caterpillar camshaft assembly for engine spare part

216-7921 Caterpillar camshaft assembly for engine spare part Featured Image
  • 216-7921 Caterpillar camshaft assembly for engine spare part

Short Description:

216-7921 Caterpillar camshaft assembly, fits 3126B inline six-cylinder engine, synchronizes intake, exhaust valve and fuel injection timing, widely used on 322C excavators, D6N dozers and truck power units.


Product Detail

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description

The 216-7921 is integrated camshaft assembly for 3126B engine with factory flange design. It drives both valve train and fuel pump. This mid-duty engine is fitted on trucks, dozers and excavators with frequent load changes. Lobe pitting, spalling or journal scoring leads to slow acceleration, rough idle, high fuel consumption and smoke. Severe damage causes valve-to-piston contact. Its flange and timing profile are exclusive for 3126B and cannot be interchanged with other camshafts.

Part No.：216-7921
Name：Camshaft Assembly
Fit Models：CAT 3126B
Equipment：322C excavator, D6N dozer, medium truck engine
Material：Forged alloy steel with induction hardened cam lobes
Matching Components：Roller lifters, cam bearings, thrust plate, oil seal

Product Advantages

1. OEM timing profile matched to 3126B fuel system, synchronized fuel delivery and valve movement for good throttle response
2. One-piece forging with integrated flange, stable concentricity and strong fatigue resistance under cyclic loads
3. Uniform hardened layer on lobes and journals reduces abrasive wear from contaminated engine oil
4. Built-in mounting flange simplifies positioning and cuts overhaul setup time

FAQ 

1. Does 216-7921 fit 3116 engine?
No. 3116 and 3126B differ in cam lift, flange dimension and fuel timing reference, non-interchangeable.

2. Can the camshaft stay in service with minor scattered pitting and no cracks?
Load fluctuates heavily on construction machines. Pitting spreads fast and replacement is recommended.

3. What risk if I install new camshaft and reuse old lifters?
Mismatched contact surfaces accelerate lobe spalling during break-in and lead to early failure.

4. Is this camshaft interchangeable with non-B version 3126 camshaft?
No. 3126B has revised fuel calibration and flange design, direct swap is not allowed.

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