1. Breakdown characteristics of the forklift in its initial stage
In the initial use period (equivalent to the run-in period) of the forklift, its failure is from high to low (declining curve). The initial failure rate is related to the quality of manufacturing or maintenance and the use during the run-in period.
If the forklift is manufactured or repaired with high quality, and can be used and maintained correctly. Then, the initial failure rate is low. Otherwise, the early failure rate will be high. Early failures are often caused by loose or loose connection bolts; loose or loose pipe joints: residual metal shavings or foundry sand can easily block the oil passage or be caught in the relative motion friction and damage the machine parts (such as the actuator cylinder in the hydraulic system) It causes oil leakage, the adjusted gap or pressure changes, so that the machine parts cannot perform the specified capacity, and some joints leak water, oil, and air due to the bolts being not tight.
2. Fault characteristics of the forklift during normal use
After the forklift break-in period ends, it enters the normal use stage. The forklift operates in this stage, as long as it is maintained and used correctly according to the regulations, generally no failures will occur, even if the failure occurs, it is also a random failure (this kind of failure is hidden and difficult to find during maintenance or inspection), so the failure rate is very high Low, the curve rises slightly.
If the forklift fails during the normal use period, it is mostly accidental or caused by improper use and maintenance.
3. The fault characteristics of the forklift used near the stage of overhaul
When the forklift is approaching the period of overhaul, the loss of various components increases and the technical condition deteriorates.
The characteristics of failures at this stage are high failure rates, and they are common. Most of them are caused by excessive wear and aging of parts. Blockages, leaks, and damages in the oil circuit occur frequently.
4. Breakdown characteristics of forklifts in different seasons
Forklift failure rate is related to the season. When using machinery at low temperatures in winter, the failure rate is higher than in summer. For example, fuel supply is often poorly atomized in winter due to low temperatures.
The fuel is easy to solidify and the oil path is blocked, which is not easy to start or the engine is turned off when the engine is running; the lubricating oil has poor fluidity, which accelerates the wear of the machine parts; the battery leakage causes the engine to be difficult to start, unreliable braking, and abnormal liquid transmission.
