Tuesday, September 6, 2011
express: Daily checklist and maintenance on a diesel genera...
express: Daily checklist and maintenance on a diesel genera...: Drain water sediment from fuel tank/fuel filter Check the fuel level in the service tank Clean air filter Check the lube oil level Check the...
Daily checklist and maintenance on a diesel generator set
Drain water sediment from fuel tank/fuel filter
Check the fuel level in the service tank
Clean air filter
Check the lube oil level
Check the battery terminal
Check the water level
Check the tension of the belt/unusual noise
Check for leakages[oil,water,coolant]
Check exhaust gas
General physical inspection for work loose parts.
WITH THESE ABOVE DAILY CHECKLISTS,PROBLEMS,MAINTENANCE COSTS,WILL BE MINIMISED,AND THE SYSTEM RELIABILITY WILL INCREASE.
THANKS FOR READING.
Sunday, September 4, 2011
MAINTENANCE OF AIR COMPRESSORS
Air compressors are a common piece of equipment found in most pumping plants and maintenance shops.There are a number of different types of compressors available,but the two most common types which are the reciprocating and the rotary screw compressors.
RECIPROCATING COMPRESSOR.
A reciprocating compressor compresses air in a cylinder,against a cylinder head,by a reciprocating piston.
MAINTENANCE SCHEDULING
LUBRICATION
WEEKLY- Check that oil or grease cups are full and that crank case oil is at proper level.Replace or add the correct lubricant to bring to proper levels in crankcase or oil reservoir.
ANNUAL- Clean oil or grease cups and piping.Check condition of lubricant and change if required.
PACKING GLAND.
WEEKLY- Check for excessive leakage and scoring on piston rod.Adjust packing as necessary.
ANNUAL- Replace packing as necessary.
CYLINDER
Not scheduled- Check cylinder walls for wear and scoring.
PISTON
Not scheduled-Check piston for wear. Check clearance with micrometer.Examine rings for tightness and fits.
CONNECTING ROD
Not scheduled- Check for distortion or bending.Check bearing bolts and nuts for damage and replace as required.
Thursday, September 1, 2011
express: MAINTENANCE OF HYDRAULIC SYSTEMS
express: MAINTENANCE OF HYDRAULIC SYSTEMS: The right way to perform maintenance on a hydraulic system utilizing the Maintenance Best Practices
Most companies spend a lot of money t...
Most companies spend a lot of money t...
MAINTENANCE OF HYDRAULIC SYSTEMS
The right way to perform maintenance on a hydraulic system utilizing the Maintenance Best Practices
Most companies spend a lot of money training their maintenance personnel to troubleshoot a hydraulic system. If we focused on preventing system failure then we could spend less time and money on troubleshooting a hydraulic system. We normally accept hydraulic system failure rather than deciding not to accept hydraulic failure as the norm. Let’s spend the time and money to eliminate hydraulic failure rather than preparing for failure. I worked for Kendall Company in the 1980’s and we changed our focus from reactive to proactive maintenance on our hydraulic systems and thus eliminating unscheduled hydraulic failure. We will talk about the right way to perform maintenance on a hydraulic system utilizing the Maintenance Best Practices.
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.
Oil Pump
Preventive Maintenance
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?
2nd: What requirements does the Equipment Manufacturer state for Preventive Maintenance on the hydraulic system?
3rd: What requirements and operating parameters does the component manufacturer state concerning the hydraulic fluid ISO particulate?
4th: What requirements and operating parameters does the filter company state concerning their filters ability to meet this requirement?
5th: What equipment history is available to verify the above procedures for the hydraulic system?
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 procedures must be a part of the PM Job Plan which includes:
* Tools or special equipment required performing the task.
* Parts or material required performing the procedure with store room number.
* Safety precautions for this procedure.
* Environmental concerns or potential hazards.
PM Procedures for Hydraulic Systems
A list of Preventive Maintenance Task for a Hydraulic System could be:
1. Change the (could be the return or pressure filter) hydraulic filter.
2. Obtain a hydraulic fluid sample.
3. Filter hydraulic fluid.
4. Check hydraulic actuators.
5. Clean the inside of a hydraulic reservoir.
6. Clean the outside of a hydraulic reservoir.
7. Check and record hydraulic pressures.
8. Check and record pump flow.
9. Check hydraulic hoses, tubing and fittings.
10. Check and record voltage reading to proportional or servo valves.
11. Check and record vacuum on the suction side of the pump.
12. Check and record amperage on the main pump motor.
13. Check machine cycle time and record.
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.
Wednesday, August 31, 2011
express: TYPES OF MAINTAINENANCE FOR EFFECTIVE EQUIPMENT RE...
express: TYPES OF MAINTAINENANCE FOR EFFECTIVE EQUIPMENT RE...: PREVENTIVE MAINTENANCE: I s the practice of maintaining equipment on a regular schedule based on elapsed time or meter readings. Its aim is ...
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