Apr 06, 2020
In the equipment use management specification, the operator is required to perform preheating and warming up before the hammer is officially broken, especially in winter construction, the requirements for this link are more stringent. However, many construction workers think that this step is very cumbersome and wastes time, and can be used without being carried out, and it is often because of the neglect of this work that the hammer tool has suffered serious losses or even failures. In this regard, let us look at the necessity of warming up before use.
This is determined by the characteristics of the equipment itself. The breaking hammer has a large impact force and a fast frequency, which is much faster than other hammers to wear the sealing components. Pre-heating warms up the machine to slowly and evenly heat up all parts of the machine body to reach the normal working temperature, which can slow down the process of oil seal wear.
When the hydraulic oil is at rest, a solid oil film adheres between the piston and the oil seal. The hammer warmer is to let the wet hydraulic oil wash out the relatively solid hydraulic oil film, and establish a new hydraulic oil film to support the oil seal to ensure Pistons and oil seals will not cause damage in the early stage.
When starting work, it is in the state of cold machine, and suddenly come over hot oil, thermal expansion and contraction will cause considerable damage to the oil seal, coupled with fast frequency movement, it will be easier to produce oil leakage and frequent oil seal replacement, etc. . Therefore, warming up the machine with a hammer will do more harm than good to customers and us.
Warm-up procedure: lift the breaker vertically from the ground, step on the foot valve for about 1∕3 stroke, and see a slight jitter in the main inlet pipe (close to the oil pipe on the side of the cab), keep the foot stroke for about 20-40 minutes .