hydraulic cone crusher maintenance

cone crusher - tips of operation and regular maintenance | hxjq

cone crusher - tips of operation and regular maintenance | hxjq

During the using process, if the worker operates and maintains the crusher according to correct standards, it will have great significance in normal production, output, quality, service life, working efficiency and the prevention of accidents, etc.

At present, the common cone crushers are mainly the single toggle cone crusher and compound cone crusher (Symons cone crusher). Although both types of cone crushers are totally different, they have the same operation procedure.

The operation procedure of cone crusher can be divided into four stages: before the start, at start-up, at run time and turning-off time. All conditions should be paid attention in each stage, and the potential problems can be found and solved timely and the service time can be prolonged.

Turn on the lubricating oil pump to run for three to five minutes. After everything runs well, turn on the crusher as required. After the crusher idles for one to two minutes, confirm that all things are well, and feed the rocks or stones.

During the crushing process, there is a great impact on the concave which makes the filled zinc layer be out of shape. Therefore, the U-type bolt should be tightened frequently to make the concave fix and avoid concave from deformation.

The mantle is fixed by the upper bolt of the main shaft. The looseness of the bolt can make the mantle unstable, even the filled layer may fall off to cause downtime. Hence, the bolts should be often checked and fixed to avoid looseness.

The spherical bearing should be installed in the borehole of crusher closely. After a long period of working, the tightness of crusher' parts can be broken. The tightness of spherical bearing must be checked frequently, and the oil gallery of the spherical bearing should be kept clean.

Water seal is the equipment for preventing crusher from dust, which is very important to the normal operation of cone crusher. Therefore, daily maintenance and checking its integrality are very necessary.

Through the study of this article, you must have a deeper understanding of the operation and maintenance of the cone crusher. In the case of the above-mentioned failure of the crusher, the problem is analyzed and solved by referring to the method given in this article.

crusher routine maintenance inspection

crusher routine maintenance inspection

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maintenance of hydraulic systems - reliabilityweb: a culture of reliability

maintenance of hydraulic systems - reliabilityweb: a culture of reliability

Lack of maintenance of hydraulic systems is the leading cause of component and system failure yet most maintenance personnel don't understand proper maintenance techniques of a hydraulic system. The basic foundation to perform proper maintenance on a hydraulic system has two areas of concern. The first area is Preventive Maintenance which is key to the success of any maintenance program whether in hydraulics or any equipment which we need reliability. The second area is corrective maintenance, which in many cases can cause additional hydraulic component failure when it is not performed to standard.

Preventive Maintenance of a hydraulic system is very basic and simple and if followed properly can eliminate most hydraulic component failure. Preventive Maintenance is a discipline and must be followed as such in order to obtain results. We must view a PM program as a performance oriented and not activity oriented. Many organizations have good PM procedures but do not require maintenance personnel to follow them or hold them accountable for the proper execution of these procedures. In order to develop a preventive maintenance program for your system you must follow these steps:

1st: Identify the system operating condition.a. Does the system operate 24 hours a day, 7 days a week?b. Does the system operate at maximum flow and pressure 70% or better during operation?c. Is the system located in a dirty or hot environment?

As in all Preventive Maintenance Programs we must write procedures required for each PM Task. Steps or procedures must be written for each task and they must be accurate and understandable by all maintenance personnel from entry level to master.

Preventive Maintenance is the core support that a hydraulic system must have in order to maximize component and life and reduce system failure. Preventive Maintenance procedures that are properly written and followed properly will allow equipment to operate to its full potential and life cycle. Preventive Maintenance allows a maintenance department to control a hydraulic system rather than the system controlling the maintenance department. We must control a hydraulic system by telling it when we will perform maintenance on it and how much money we will spend on the maintenance for the system. Most companies allow the hydraulic system to control the maintenance on them, at a much higher cost.

In order to validate your preventive maintenance procedures you must have a good understanding and knowledge of "Best Maintenance Practices" for hydraulic systems. We will convey these practices to you.

Hydraulic KnowledgePeople say knowledge is power. Well this is also true in hydraulic maintenance. Many maintenance organizations do not know what their maintenance personnel should know. I believe in an industrial maintenance organization that we should divide the hydraulic skill necessary into two groups. One is the hydraulic troubleshooter, they must be your experts in maintenance and this should be as a rule of thumb 10% or less of your maintenance workforce. The other 90% + would be your general hydraulic maintenance personnel. They are the personnel that provide the preventive maintenance expertise. The percentages I gave you are based on a company developing a true Preventive / Proactive maintenance approach to their hydraulic systems. Let's talk about what the hydraulic troubleshooter knowledge and skills.Hydraulic Troubleshooter:Knowledge - Mechanical Principles / force, work, rate, simple machines. Math / basic math, complex math equations. Hydraulic Components / application and function of all hydraulic system components. Hydraulic Schematic Symbols / understanding all symbols and their relationship to a hydraulic system. Calculate flow, pressure, and speed. Calculate the system filtration necessary to achieve the system's proper ISO particulate code. Skill - Trace a hydraulic circuit to 100% proficiency. Set the pressure on a pressure compensated pump. Tune the voltage on an amplifier card. Null a servo valve. Troubleshoot a hydraulic system and utilize "Root Cause Failure Analysis". Replace any system component to manufacturer's specification. Develop a PM Program for a hydraulic system. Flush a hydraulic system after a major component failure. General Hydraulic: Knowledge - Filters / function, application, installation techniques Reservoirs / function, application Basic hydraulic system operation Cleaning of hydraulic systems Hydraulic lubrication principles Proper PM techniques for hydraulics Skills - Change a hydraulic filter and other system components. Clean a hydraulic reservoir. Perform PM on a hydraulic system. Change a strainer on a hydraulic pump. Add filtered fluid to a hydraulic system. Identify potential problems on a hydraulic system. Change a hydraulic hose, fitting or tubing.

Measuring SuccessIn any program we must track success in order to have support from management and maintenance personnel. We must also understand that any action will have a reaction, negative or possible. We know successful maintenance programs will provide success but we must have a checks and balances system to ensure we are on track. In order to measure success of a hydraulic maintenance program we must have a way of tracking success but first we need to establish a benchmark. A benchmark is method by which we will establish certain key measurement tools that will tell you the current status of your hydraulic system and then tell you if you are succeeding in your maintenance program. Before you begin the implementation of your new hydraulic maintenance program it would be helpful to identify and track the following information.1. Track all downtime (in minutes) on the hydraulic system with these questions answered. / Tracked daily / What component failed? Cause of failure? Was the problem resolved? Could this failure have been prevented?2. Track all cost associated with the downtime. / tracked daily / Parts and material cost? Labor cost? Production downtime cost? Any other cost you may know that can be associate with a hydraulic system failure.3. Track hydraulic system fluid analysis. Track the following from the results. / take samples once a month / Copper content Silicon content H2O Iron content ISO particulate count Fluid condition (Viscosity, additives, and oxidation).

Many organizations do no know where to find the method for tracking and trending the information you need accurately. A good Computerized Maintenance Management System can track and trend most of this information for you.

Modifications to an existing hydraulic system need to be accomplished professionally. A modification to a hydraulic system in order to improve the maintenance efficiency is important to a company's goal of maximum equipment reliability and reduced maintenance cost.

Objective: The objective of this pump and modification is to reduce contamination that is introduced into an existing hydraulic system through the addition of new fluid and the device used to add oil to the system.

Additional Information: Hydraulic fluid from the distributor is usually not filtered to the requirements of an operating hydraulic system. Typically this oil is strained to a mesh rating and not a micron rating. How clean is clean? Typically hydraulic fluid must be filtered to 10 microns absolute or less for most hydraulic system, 25 microns is the size of a white blood cell, and 40 microns is the lower limit of visibility with the unaided eye.

Many maintenance organizations add hydraulic fluid to a system through a contaminated funnel and may even used a bucket that has had other types of fluids and lubricants in them previously, without cleaning them.

Recommended equipment and parts: Portable Filter Pump with a filter rating of 3 microns absolute. Quick disconnects that meet or exceeds the flow rating of the Portable Filter Pump. A " pipe long enough to reach the bottom of a hydraulic container your fluids are delivered in from the distributor. A 2" reducer bushing to "npt to fit into the 55 gallon drum, if you receive your fluid by the drum. Otherwise, mount the filter buggy to the double wall "tote" tank supports, if you receive larger quantities. Reservoir vent screens should be replaced with 3/10 micron filters, an openings around piping entering the reservoir sealed.Show a double wall tote tank of about 300 gallons mounted on a frame for fork truck handling, with the pump mounted on the frame work.

2nd. Modify the Hydraulic ReservoirObjective: The objective is to eliminate the introduction of contamination through oil being added to the system or contaminates being added through the air intake of the reservoir. A valve needs to be installed for oil sampling.

Additional Information: The air breather strainer should be replaced with a 10-micron filter if the hydraulic reservoir cycles. A quick disconnect should be installed on the bottom of the hydraulic unit and at the level point on the reservoir with valves to isolate the quick disconnects in case of failure. This allows the oil to added from a filter pump as previously discussed and would allow for external filtering of the hydraulic reservoir oil if needed. Install a petcock valve on the front of the reservoir that will be used for consistent oil sampling.

Equipment and parts needed: Quick disconnects that meet or exceeds the flow rating of the Portable Filter Pump. Two gate valves with pipe nipples. One 10 micron filter breather.WARNING: Do not weld on a hydraulic a reservoir to install the quick disconnects or air filter.

As in any proactive maintenance organization you must perform Root Cause Failure Analysis in order to eliminate future component failures. Most maintenance problems or failures will repeat themselves without someone identifying what caused the failure and proactively eliminate it.

A preferred method is to inspect and analyze all component failures. Identify the following: Component Name and model number. Location of component at the time of failure. Sequence or activity the system was operating at when the failure occurred. What caused the failure? How will the failure be prevented from happening again?

Failures are not caused by an unknown factor like "bad luck" or "it just happened" or "the manufacturer made a bad part". We have found most failures can be analyzed and prevention taken to prevent their reoccurrence. Establishing teams to review each failure can pay off in major ways.To summarize, maintenance of a hydraulic system is the first line of defense to prevent component failure and thus improve equipment reliability. As spoken about earlier, discipline is the key to the success of any proactive maintenance program.

home - mccloskey international

home - mccloskey international

Our Head Office and manufacturing facility in Ontario, Canada is an advanced and highly capable 410,000 square foot production plant, while our secondary facility in Co. Tyrone, Ireland houses the worlds premier crusher and screener engineering office. Since 2019, we are part of Metso Outotec, a world-leading industrial company offering equipment and services in the mining, aggregates, recycling and process industries.

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