Hydraulic Oil Care in the Offline Circuit, Winch | Tug Bot
Customer Case
Hydraulic system, winch
Ship: Tugboat “BEAUFORT”, built in 2010 by Damen Shipyards in the Netherlands
Hydraulic oil: Shell Tellus 46
Oil volume: 1.200 Litres
Challenge
High temperatures put extreme strain on the hydraulic oil of the winch and accelerate oil ageing processes with immense consequences for the entire hydraulic system. To value the oil more precisely, an oil sample was taken and analysed by an independent laboratory. Result of the analysis: high Varnish and particle content, the oil was so contaminated that exact particle counting was not possible, black membrane filter. The hydraulic system was extremely dirty. At that point, the Dublin Port Company had already installed a CJC® Hydraulic Filter 27/108 in the offline circuit on their RoRo Ferry ramp hydraulic system. Due to the excellent results there, the operator decided to test such a CJC® Filter for the tractor’s winch as well.
Tug boat “BEAUFORT”
Solution
A CJC® Hydraulic Filter 27/27 was installed. Installation in the bypass flow ensures continuous fine and depth filtration, drying and maintenance of the hydraulic oil.
Filter material: 100% natural fibers
Filtration degree: 3 µm absolute, retention rate 1 µm
Dirt holding capacity: up to 10 kg
Water holding capacity: approx. 0.9 liters
CJC® Hydraulic Filter 27/27 installed at the hydraulic winch system of the tug boat.
Result with CJC® Hydraulic Filter
The sample that confirmed the poor oil condition was taken in December – the cleanliness class according to ISO 4407 was approximately 22/20/14. The oil was so contaminated and dark that an exact particle number was not countable and impeded the ISO Code’s classification. The CJC® Hydraulik Filter was installed shortly after the report of the laboratory. Already after the first filter pass, a second oil sample was taken – the oil cleanliness level improved to 15/14/11 (acc. to ISO 4407). Four months after the installation of the CJC® Hydraulic Filter, a further analyses was taken and documented the ISO Code 13/12/7 – perfect condition for optimum system reliability. No problems were seen on the winch system anymore. According to Noria Corporation, this means that the hydraulic components can be expected to last 10 times longer.
Oil samples
BEFOREwithout care
With CJC® after 1st filter pass
With CJC® after 4 months
Savings & Benefits for our Customer
By installing the CJC® Hydraulic Filter, our customer has achieved the following benefits:
- Risk of losing charter reduced (coming off-hire)
- reliable, functional winch due to a consistently clean hydraulic system — pumps, valves and pistons optimally protected
- 10-times longer lifetime for hydraulic components possible
- Oil change avoided, and 1,200 Litres of hydraulic oil saved
- CO2 emissions reduced – 5,760 kg of CO2 are saved per avoided oil change *)
*) The thermal disposal of waste oil produces approx. 4.8 kg of CO2 per 1 liter.
Development of the particle content in the hydraulic system
Oil analyses by Filtrex Services, particle content in 100 ml
| Zero test BEFORE | With CJC® hydraulic filter after 1st filter run | With CJC® hydraulic filter after 4 months | |
| Particles > 2 µm | not exactly measurable | 16.780 | 7.804 |
| Particles > 5 µm | not exactly measurable | 10.995 | 2.496 |
| Particles > 15 µm | not exactly measurable | 1.950 | 77 |
| ISO code 4407 *) | 22/20/14 | 15/14/11 | 13/12/7 |
*) Information on the determination of cleanliness classes and oil analyses available on request.
Customer comment
“I highly recommend talking to CJC®! Especially if the oil condition on board your vessels presents you with challenges. These systems work!”
Technical Supervisor, Dublin Port Company
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