452-8184 rear camshaft CAT engine spare part

452-8184 rear camshaft CAT engine spare part Featured Image
  • 452-8184 rear camshaft CAT engine spare part

Short Description:

Part No.452-8184, caterpillar rear camshaft for large excavator main engine, controls rear cylinder valve timing under digging shock load, different from paver 450-6634 and compressor 450-6633, shaft only without gear.


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description

This 452-8184 rear camshaft is forged from vacuum refined fine-grain alloy steel. Its cam profile improves exhaust scavenging for rear cylinders to reduce carbon buildup during digging load. Torque is transmitted through spline joint, with integrated thrust shoulder. Gear and spacer are sold separately. It fixes weak rear-bank power, high exhaust temperature and coupling noise under digging load. Excavator load changes sharply, its timing and heat treatment are not interchangeable with road or compressor camshafts, and must be matched with front camshaft.

Part No.：452-8184
Name：Rear Camshaft
Material：Vacuum refined fine-grain alloy steel
Process：Integral forging, carburizing quenching, segmented precision grinding, cam profile inspection, spline tolerance check
Package：Camshaft only, gear, thrust washer and spacer sold separately
Application：Cat large excavator main engine, earthmoving and mining digging power unit

Advantages

1. Digging-specific cam profile, extended exhaust duration to expel exhaust gas and reduce carbon deposit on rear cylinders
2. Integrated spline thrust shoulder, small transmission clearance and stable timing under impact
3. Balanced tough hardened journal surface, resistant to uneven wear and pitting under cyclic digging shock
4. Split single shaft design, replace rear segment only instead of full timing assembly to cut overhaul cost
5. Spline runout, cam lift and concentricity inspected individually, convenient for excavator service stock

FAQ 

Q：Can 452-8184 excavator rear camshaft replace paver 450-6634?
A：Not interchangeable. Different cam profile and spline design will cause binding and valve collision.

Q：Can the camshaft be reused after light journal scratches polished?
A：It can be used temporarily within tolerance. Deep grooves require replacement to avoid seizure during digging.

Q：How to store this rear camshaft?
A：Rest horizontally on multi-point supports, coat cams, journals and splines with anti-rust grease and cover with dust shield.

Q：Is oil and filter change recommended after installation?
A：Recommended, to prevent hard particles from scratching new cam lobes.

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