What is the reason for the Caterpillar 336D excavator engine not starting?
Common causes of engine failure to start on CAT 336D excavator:
1. The fuel injector is damaged.
2. The fuel injection pump coupling is damaged.
3. The flywheel ring gear is damaged.
4. The timing gear or timing belt is damaged.
Detailed analysis of the cause of the failure of the Caterpillar 336D used excavator engine to start:
1. The fuel injector is damaged.
The function of the fuel injector is to automatically advance the fuel injection angle as the engine speed increases, in order to meet the optimal fuel injection time requirements of the combustion system. Therefore, if this component is damaged, it may cause the engine to completely fail to start.
2. The fuel injection pump coupling is damaged.
The coupling or timing gear of the fuel injection pump is damaged, and everything is normal when the engine is started, but there is no oil in the high-pressure fuel pipe of the fuel injection pump. This type of fault is very easy to diagnose for engines with external fuel injection pumps, but it is relatively difficult to diagnose such faults for engines with relatively concealed high-pressure pump installations such as V-type engines.
3. The flywheel ring gear is damaged.
If the flywheel ring gear is damaged, there will be movement and idle noise from the starter when the engine starts, and the engine crankshaft will not move.
4. The timing gear or timing belt is damaged.
If the timing gear of the engine experiences faults such as tooth loss or broken fastening bolts, which disrupt the original operating rules, it is natural for the engine to fail to start.
Excavator engine failure to start Other reasons:
1. Factors related to batteries include insufficient power, virtual or disconnected starting circuits.
2. Starter motor malfunction, specifically including: damaged starter motor and damaged starter gear.
3. The ambient temperature is too low.
4. Equipment factors.
5. Factors related to electronic control (ECU or sensor) systems.
