338-0647 rear camshaft CAT engine spare part

338-0647 rear camshaft CAT engine spare part Featured Image
  • 338-0647 rear camshaft CAT engine spare part
  • 338-0647 rear camshaft CAT engine spare part

Short Description:

Part No.338-0647, caterpillar rear engine camshaft, controls valve timing for rear cylinder bank, replacement part for heavy-duty cat diesel engine used on generator sets and mining machines.


Product Detail

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description

This 338-0647 rear camshaft is forged from vacuum refined alloy steel. Its rear cam lift and timing angle are calibrated separately for rear cylinder bank. Deep carburizing and quenching treatment on cam surface improves impact resistance and contact fatigue resistance. On dual-camshaft engines, it works with front camshaft to synchronize valve and fuel injection timing, fixing weak power, exhaust backfire and timing disorder on rear cylinders. It is widely used for overhaul of continuously running heavy-duty power units.

Part No.：338-0647
Name：Rear Engine Camshaft
Material：Vacuum refined alloy forged steel
Process：Integral forging + deep carburizing quenching + precision grinding
Position：For rear cylinder bank
Package：Bare shaft (gear and bushing not included)
Application：Caterpillar mining machinery and stationary diesel generator sets

Product Advantages

• Helps in controlling the valve timing, the camshaft optimizes the engine’s power output, fuel efficiency, and exhaust emissions
• Withstands mechanical stress, without compromising performance or safety

1. Timing curve specially designed for rear cylinder bank, perfect match with front camshaft
2. Adequate hardened layer, resistant to cam lobe pitting under continuous high temperature
3. Strict concentricity control on journals, reduces uneven wear of rear bearings
4. Same locating holes and drive end dimension as oem, no modification required during assembly
5. Runout, hardness and cam profile inspected one by one, suitable for bulk generator maintenance

FAQ 

Q：Can I replace 338-0647 alone without changing the front camshaft?
A：Single replacement is acceptable, but you must record original timing and re-calibrate the whole engine timing after installation.

Q：What typical faults are caused by worn rear camshaft?
A：Reduced power on rear cylinders, high exhaust temperature, rough idle and abnormal injection timing.

Q：How to tell front and rear camshaft apart after delivery?
A：Check cam profile, overall length and drive end structure. This part has unique drive end for rear bank.

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