425-6613 left bank camshaft assembly CAT engine spare part

Maintenance & Replacement Tips

1. When lifting, support the shaft body to distribute the load; do not lift by the gears, as this may cause gear displacement or bending of the long shaft.
2. Strictly distinguish between the left and right cylinder banks; do not substitute a camshaft from the right bank for this left-bank component.
3. Gas-fueled engines require high timing precision; mark the timing settings before disassembly and ensure precise alignment during reassembly.
4. Inspect the tappets, pushrods, valve springs, and camshaft bearings associated with the left cylinder bank; replace any worn components.
5. During the break-in period, apply load gradually while continuously monitoring gas pressure, exhaust temperature, and unit vibration to prevent engine knocking (detonation).

FAQ 

Q：Can 425-6613 left bank camshaft assembly replace 425-6612 right bank unit?
A：Not interchangeable. Different phase and lift will cause valve collision, engine knock and power imbalance.

Q：Can the camshaft be reused after light journal scratches are polished and measured?
A：It can be used temporarily if dimension stays within tolerance. Deep grooves require replacement to avoid bearing seizure.

Q：How to store this gas engine camshaft assembly properly?
A：Hang vertically, apply anti-rust oil on gear teeth and cam lobes, cover with moisture-proof film.

Q：Is oil and filter change recommended while replacing this left bank camshaft assembly?
A：New engine oil and filter are recommended to protect new cam lobes from oil impurities.