6D125 Used Camshaft 6150 - 41 - 1120 For Excavator PC400 - 5 PC 450
- 7 - 8
Specification
| Item name | Engine Camshaft |
| Geer quantity | 44 |
| Application | Engineering Machinery Engine |
| Camshaft code | 6151 - 41 - 1112 |
| Car model | PC400 - 7 PC400 - 8 |
| Engine type | Diesel |
| Injection | Direct injection |
Description
Camshaft Types
Roller LiftersThere are two major types of camshafts: Flat Tappet
and Roller Cams.
Lifters are not actually flat on the contact surface. They do have
a slight curve, but it's hard to see. Roller Cams use a lifter with
a roller on it. The roller cam looks like the flat tappet cam, but
the cam lobes are very different. Roller cams have fatter lobes
because of the way the cam lobe contacts the lifter. Roller lifters
reduce friction, increase RPM potential and allow higher valve
spring pressures to be used. Flat tappet camshafts can only
withstand so much valve spring pressure pushing the lifter against
the cam lobe.
Cam Lobe Profilesm as you increase valve spring pressure on a flat
tappet cam, you increase wear on the cam lobe and the cam contact
face of the lifter. This is a limiting factor when compared to a
roller setup. To build big horsepower you need to have a cam with a
lot of lift to open those valves wide. A lot of cam lift will
require a higher pressure valve spring, giving the roller
cam/lifter the advantage over flat tappet cams for building higher
horsepower engines.
What are performance camshafts?
Camshafts are the most critical part of your engine's performance.
Camshafts use a combination of separation angles, lift, duration
and lobe acceleration/ramp rates to create what is called a cam
profile . The profile you choose determines where your maximum
horsepower and torque will occur.
What does duration of camshaft mean?
Camshaft duration is the period of time, measured in degrees of
crankshaft rotation, that a valve is open. “Advertised duration”
measures duration from the point where the cam manufacturer
believes the lobe starts raising the lifter. This is called the
checking height and it varies from manufacturer to manufacturer.
