• Remote Mounted Unit for easy servicing
• Maximum pressure rating of Unit 10 Bar
• Lid torque pressure 28ib/ft/4Kg/cm2

Casting subjected to batch and individual testing constructed of Aluminum (BS 1490 LM6 (M))

The KLEENOIL Filter Cartridge

Description
The KLEENOIL cartridge is made of densely wound pure coniferous long fibre wood pulp paper. It is held together in a material casing and comes in specified sizes for use in the appropriate filter housing

Action of Cartridge
The filter cartridge acts both by absorption and adsorption in a continuous recycling process. The long fibres of the paper attract the water formed either thought the combustion process and absorb like a sponge, at the same time rejecting the large oil molecules which are forced to pass between the tight windings of the cartridge. As the oil passes thought the cartridge minute carbon, wear metal, and silicon particle are extracted from the oil by adhering to many surfaces of the filter - a process known as adsorption. Thus, the cartridge, by removing water inhibits the production of acids which both degrade the oil and cause excessive wear. The simultaneous removal of minute contaminants as they occur enabled the oil to be extended within its original operating specification.

Important note
While the filter is extracting the water and contaminants it is continuously safeguarding the desirable elements compounded within the actual oil in use. These typically include, dependent on use, dispersants, detergents, oxidation and rust inhibitors, metal de-activators, pour-point depressants, VI improvers, lubricity agents, fungicidal, anti-foaming and gelling additives. These additives are held in suspension and their levels can be critical if the oil is to maintain its beneficial effect.

The KLEENOIL ' High Pressure ' oil filter can be fitted on the ' By-Pass' basis to hydraulic systems, compressors, or any system with oil at pressure up to 3000 PSI

The flow thought the KLEENOIL filter is controlled to approximately four littres per minute at 40 PSI. A flow rate which is low enough to have negligible effect on most ' System Pressures ', Yet high enough to ensure that oil is being kept in ' As New ' condition.

Filtration Level
Particulate contamination in accordance with BS 5540 part 4: 1981 and ISO/DIS 4406 14/9, equivalent to NAS1638 class 6 (Hydraulic Oil Specification)

Water Retention
To < 0.025 %

Total Water Capacity of Cartridges
Code 1878 - 0.56 L.
Code 1888 - 1.20 L.

NAS Grade (national Aerospace Standard 1638)
NAS Grade is widely adopted standard to measure the contamination degree of hydraulic oil.

Level of filtration applying to all units - BS 5540/4, ISO 14/9 and equiv. NAS 1638 class 6, water removal to < 0.05 % up to capacity of cartridges which is 0.26 gall. (1.2 litres) each

Flow Rate
It is impossible to state an exact flow rate because it is dependent upon many factors such as viscosity, temperature and a degree of contamination of fluid and also pump pressure and degree of contamination of cartridges. As an approximate guide the flow of 32 sec. Hydraulic oil at room temperature through new KLEENOIL cartridges will be :

If faster flows are required they can be achieved by specifying alternative pumps

Operation
The system is operated by an isolator switch with an ' on/off ' lever. A starter and red/green indicator lights can be fitted if required.

Changing The Cartridges
The cartridges change frequency will depend on the amount and type of contamination in the fluid being cleaned. Under normal condition the cartridges should be changed every 250 hours, which related to about one month of contamination operation.

To effect the cartridge change switch off the motor, release the inlet ' quick release ' coupling and then run the motor for a few seconds to purge most of the oil in the filter, wait for a few minutes for pressure to subside, and then release the lid retaining bolt. (19mm or 3/4 AF spanner) . To avoid spillage, the polythene bag from the new cartridge should be placed over the filter body, and the cartridge can be removed by grasping the brass eyelet on the top of the cartridge. Replace new cartridge, and tighten lid securing bolt to 28lb/4Kg. Reconnect the ' quick release ' coupling, and the unit is ready for use.

Transfer Pump Facility
The system can be used as a transfer pump by simply removing the ' quick release ' coupling from the filter outlet, and fitting it to the pump outlet, thereby by-passing the filter.

The cleanliness of your Hydraulic Fluid is critical to the trouble free and cost effective operation of your system. Hydraulic components are very expensive and need special consideration when selecting and filtering this fluid.

ISO 4406 code is a standard that is recognized in the industry. Certain recommended fluid cleanliness quantities are necessary to realize the best performance and cost saving operation of your hydraulic system.

Determine the required standard of filtration you require from the chart below:

KLEENOIL Filtration will attain ISO 4406 to standard of less than 14/9

Table of ISO 4406 Particle Counts

In the example: Particle count per 1 Milliliter of oil.
16/14 results in 480 average count of > 5 micron size and average count of > 15 micron size.

To ensure that you achieve the most efficient and relevant results, it is important to establish and maintain an oil analysis program.

Don't change the oil - filter it.
Water or particle contamination rarely necessitates an oil change - unless the contamination has resulted in additive depletion or base oil degradation. These contaminants can be removed from hydraulic fluid by filtration.

Prefill piston pumps and motors to prevent "infant mortality".
When installing a piston pump or motor, always fill the case of the unit with clean hydraulic fluid prior to start-up. Failure to do so almost guarantees dry-start failure. If the unit is mounted in a vertical position and the case drain line is flexible, use
this technique to fill the case:
1- Position the pump or motor horizontally (case drain port up) within reach of the case drain line.
2- Fill the unit with clean hydraulic fluid through the case drain port.
3- Connect the case drain line.
4- Mount the unit in position.

Eliminate particles to reduce breakdowns
Research has shown that maintaining fluid cleanliness at ISO 4406 14/11 will result in a tenfold gain in the average time between breakdowns when compared with a fluid cleanliness level of 22/19. This is based on the findings of a three-year study of
117 mobile and industrial hydraulic machines to determine the correlation between fluid cleanliness and breakdown frequency.

And extend fluid life.
Particle contamination reduces the service life of hydraulic fluid by stripping additives and promoting oxidation. Additives attach to particles, which are then removed by the filters or settle to the bottom of the reservoir. Wear metal caused by particle abrasion is a catalyst for fluid oxidation.

Be aware of the true cost of oil leaks.
Where fluid leaks out, contamination gets in. Given that studies have shown that it costs 10 times more to extract contaminants from hydraulic fluid than it does to exclude them, the immediate rectification of hydraulic system leaks not only minimizes the cost of clean-up, disposal and replacement fluid, it also saves the hidden cost of removing ingested contaminants.

Don't let the reservoir inhale dust or moisture.
Standard filler-cap breathers fitted to the majority of hydraulic reservoirs are not effective in preventing ingression of airborne contaminants. All air entering the reservoir should be adequately filtered. In damp environments (e.g. marine applications, tropical climates) desiccant breathers are essential to prevent the ingression of airborne moisture. Remember, it costs much less to exclude contamination than it does to extract it.

Get your cylinder rods straight.
An important step in the cylinder repair process that is often skipped by DIY repairers, is the checking of rod straightness. Bent rods cause distortion, and ultimately premature failure, of the rod seal(s). Rod straightness should always be checked when a cylinder is being re-sealed or repaired.

Replace pipe threads for leak-free plumbing.
NPT is the least reliable type of connector for high-pressure hydraulic systems because the thread itself provides a leak path. The threads are deformed when tightened and as a result, any subsequent loosening or tightening increases the potential for leaks. Replace pipe thread connections with soft seal connections such as UNO or BSPP for leak-free reliability.

Inspect and protect hoses.
Hydraulic hose manufacturers estimate that 80% of hose failures are attributable to external physical damage through pulling, kinking, crushing or abrasion of the hose. To prevent external damage, ensure all clamps are kept secure, pay careful attention to routing whenever a replacement hose is installed and if necessary, apply inexpensive polyethylene spiral wrap to protect hoses from abrasion.

Don't let cylinders become dirt includers.
Maintain cylinder rods and wiper seals in good condition. Worn or damaged wipers and pitted or gouged rods give dust and other contaminants an easy path into the system. Fitting rod protectors (bellows) to cylinders operating in abrasive or corrosive
environments can extend rod and wiper seal life and provides and extra barrier to the ingression of contaminants via the cylinder rod.

ABOUT THE AUTHOR: Brendan Casey has more than 20 years experience in the maintenance, repair and overhaul of mobile and industrial hydraulic equipment. For more information on reducing the operating cost and increasing the up-time of your hydraulic equipment, visit his web site:
http://www.hydraulicsupermarket.com/