In this post, you will learn how to change the transmission fluid (HT-1000) in Parker's HTG hydrostatic transmission in...
In this post, you will learn how to change the transmission fluid (HT-1000) in Parker's HTG hydrostatic transmission in your mower. The HT-1000 Service Kit includes all the replacement parts needed for a smooth fluid change.
The transmission fluid in your mower should be changed at regular intervals to maintain the life of the mower. The HT-1000 transmission fluid only needs to be changed once every 1000 hours, as opposed to as early as 500 hours with other brands. Our Hydrostatic Transmission Fluid HT-1000™ is a synthetic transmission oil engineered to provide maximum durability and long life for heavy-duty hydrostatic drive systems.
Making oil changes simple and efficient
Our transmissions for off-road vehicles are designed to make oil changes very quick and simple, and the new service kit makes the process even easier by providing all the necessary oil change components. Contact your local dealer for more information!
Each transmission includes a low-speed, high torque motor (Torqmotor) integrated with a hydraulic pump to provide an all-in-one transmission package. the transmissions are ideal for zero-turn mowers, golf course maintenance equipment, and light-duty utility vehicles.
Each HTG service kit includes:
(2) gallons of HT-1000
(2) replacement filters
(2) plugs w/ washers
Watch how to change your transmission oil in this video:
How to Change Your HT-1000 Using a Parker Hydrostatic Transmission Service Kit step-by-step:
1) Remove Plug from the Transmission Bottom Cover
2) Remove Vent Plug from the Top of Transmission
3) Remove Filter from Transmission
4) After Oil is Drained, Insert New Filter
5) Install New Transmission Plugs
6) Lower the Mower
7) Raise the Seat
8) Remove Expansion Tank Cap
9) Add HT-1000 Fluid to Tank
10) Re-install Cap and the Vent Plug
11) Close the Seat
That's it! After completing these simple steps, you will have successfully changed your HT-1000 transmission fluid.
Our Pump & Motor Division (PMD) is a market leader in gear pump and low speed-high torque gerotor motors. PMD continues to blaze a trail by developing new technologies while maintaining a high level of service synonymous with Parker. Between the two divisions in North Carolina and Tennessee, the PMD team members have decades of industry experience to better serve you and your application.
Article contributed by CT Lefler, marketing product manager, Pump, and Motor Division.
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This article will teach you to how to change the transmission fluid (HT-1000) in the Parker HTE and HTJ hydrostatic transmissions on your mower. The HT-1000 Service Kit includes all the replacement parts needed for a smooth fluid change.
The transmission fluid in a mower should be changed at regular intervals to maintain the life of the mower. Parker’s HT-1000 only needs to be changed once every 1000 hours, as opposed to as early as 500 hours with other brands. Parker’s Hydrostatic Transmission Fluid HT-1000™ is a synthetic transmission oil engineered to provide maximum durability and long life for heavy-duty hydrostatic drive systems.
Meet the quick and simple oil change
Parker’s transmissions are designed to make oil changes very quick and simple, and the new Service Kit makes the process even easier by providing all the necessary oil change components. Contact your local dealer for more information.
Each transmission includes a low-speed, high torque motor (Torqmotor) integrated with a hydraulic pump to provide an all-in-one transmission package. The transmissions are ideal for zero-turn mowers, golf course maintenance equipment, and light-duty utility vehicles.
Each HTE/HTJ Service Kit includes:
Watch how to change your oil:
How to change your HT-1000 fluid using a Hydrostatic Transmission Service Kit - step by step:
1) Remove Filter Cap
2) Twist off Breather Cap / Dipstick
3) Remove Magnetic Plugs
4) Remove Filter Plug and Allow Oil to Drain
5) Install New Magnetic Plugs
6) Install New Filter
7) Re-install Filter Plug
8) Lower Mower and Raise Seat
9) Locate Tank and Insert Funnel
10) Add HT-1000 to Tank
11) Replace Breather Cap / Dipstick
12) Raise Mower and Place on Supports
13) Engage Wheels in Both Directions
That's it! After completing these simple steps, you will have successfully changed your HT-1000 transmission fluid.
Our Pump & Motor Division (PMD) is a market leader in gear pump and low speed-high torque gerotor motors. PMD continues to blaze a trail by developing new technologies while maintaining a high level of service synonymous with Parker. Between the two divisions in North Carolina and Tennessee, the PMD team members have decades of industry experience to better serve you and your application.
Article contributed by CT Lefler, marketing product manager, Pump, and Motor Division.
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How to Change Your Engine and Machine Oil Faster, Cleaner and Safer
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Salt is one of the most troublesome contaminants for gas turbine operators. In the offshore/coastal environment or indeed anywhere close to bodies of saltwater, corrosion of turbines can be swift and severe if airborne salts are not adequately understood and properly filtered. Salt removal is one of the areas that needs to be understood and defined.
The enormous amount of air a gas turbine consumes means even the smallest percentage of salt can have serious consequences. Over time, advanced filtration systems have moved from offering 95% salt removal efficiency to today, greater than 99.9%. This 5% difference seems small but is very significant in terms of the reliability and performance of the turbine.
Salt is perilous to gas turbines for two main reasons;
To rub further salt into the wounds, the hygroscopic/sticky nature (has an affinity for water and absorbs moisture from the surrounding air) of salt when in moisture-rich environments means it easily adheres to the compressor and turbine blades; increasing the rate at which contaminants build up on the surfaces and so more quickly impacting the aerodynamic performance of the turbine and its overall thermal efficiency. Below 40% relative humidity (RH), salt appears in dry form. Above 75% RH, it is in a liquid form. In between these states, salt exists in a particularly problematic, damaging wet and sticky form.
A bit of history on measurementHow much salt is in the air was defined by the National Gas Turbine Establishment (NGTE) 30 knot aerosol standard back in the 1970s? Based on the amount of salt present in a series of air samples collected by the UK Royal Navy in the North Atlantic, this figure was set at 3.6 ppm (parts per million). Unfortunately, 3.6 ppm is very high and not a realistic appraisal of the true offshore environment. This was recognised by the NGTE at the time and was only ever meant to be an interim measure until more detailed test information became available. Less salt in the air is of course a good thing, however, it is also key that GT operators have a realistic view of how much salt is in the air in order that they may correctly specify filtration systems that limit the amount reaching the inside of the machine. This anomaly prompted Parker Hannifin, to carry out an ASME paper research project back in 2004, resulting in a new ppm figure for ambient air salt concentration and size distribution in the marine environment. This revised figure, now known as the McGuigan Marine Boundary Layer (MMBL), provides a conservative, realistic figure for the average salt levels in the lower marine boundary layer (MBL) throughout the world. Still a realistic measure today, it puts the salt level at 0.1067 ppm.
Each percentage point counts
The more contaminants that are allowed through to the turbine, the quicker its aerodynamic efficiency will reduce and the greater the risk of damage to the machine. Ultimately this reduction in performance will result in reduced power output, lower system availability and reliability, and higher maintenance costs.
Unlike contaminants that cause compressor fouling (and can be cleaned away by water washing), one of the major problems with salt corrosion is that its effects are often not perceived in turbine performance data until something actually breaks. Unscheduled maintenance can be significant but, in many mechanical drive applications, the cost of lost productivity can also be huge.
If a turbine consumes 350,000 kg of air per hour (typical 30MW GT) and there is 0.1607 ppm of salt by weight in the air to start with (1ppm(w) = 1mg/kg), this equates to an unfiltered gas turbine exposure of nearly 300 kg of salt per year for an 8000hr operating year!. This means each 0.1% improvement in filtration efficiency protects the turbine from an extra 0.3 kg of salt exposure per year.
Designing a filter for salt removal
Salt can exist in a solid, a liquid or a sticky in-between state. Changes in relative humidity affect the state of solidity of the salt. As a liquid salt droplet is transformed through drying to a solid particle, it will also contract to about 25% of its original size. To handle salt effectively, a filtration solution needs to allow for input concentration, aerosol size distribution and aerosol physical state; whether droplet, dry particle or any in-between/sticky state.
A filter system also needs to provide this protection without getting easily blocked itself. The right solution for a given application therefore also has to consider the impact of increased pressure drop from multiple filtration stages with the Gas Turbine salt protection needs and must be designed to handle and remove both salt phases in order to properly protect the turbine. Dust filters will capture solid dry salt particles. Liquid removal stages and hydrophobic filters prevent salt from attacking the turbine internals in liquid form.
One of the vital elements in handling salt corrosion in offshore and coastal environments is to effectively handle the moisture in the air. Filter media with high dry particulate efficiency ratings may not necessarily be effective at handling liquid droplets. Coalescers can manage free moisture and salt in liquid form (brine) by agglomerating droplets to make them larger and heavier so they will fall out of the airstream. Although traditionally associated with large maintenance overheads, coalescers are now available that will run for extended periods without sudden pressure spikes and in configurations that can be easily cleaned with a water or air hose.
Dry salt particles can be dealt with by high efficiency (HEPA/EPA) filters but care needs to be taken with media selection to ensure these filters are not quickly blocked by moisture or sticky salt particles. Tests in real-world applications have shown that thicker glass fibre media is less prone to blockage in such environments than ePTFE membranes, which are 10 times thinner. Glass fibre media with effective hydrophobic coatings have been shown to prevent virtually all liquid salt and/or sticky salt particles from entering the turbine.
How offshore installations are different
For an offshore oil and gas installation, a multi-stage filtration system is required to handle the various, harsh environmental challenges faced. As space offshore is at a premium, it often makes sense to install a more compact, high velocity filter system with a multi-stage Vane Coalescer Vane (VCV) salt removal system. Stage one is an inertial vane separator that removes bulk water including rain, sea spray and coarse aerosols. This is followed by a coalescer that coalesces fine salt aerosols into larger droplets (>20 µm). This stage also captures fine dust and dry salt. The final inertial vane separator stage stops and removes the re-entrained larger salt droplets.
A traditional M6 (EN779) VCV inlet filtration system is a popular choice for offshore turbines and offers excellent wet salt and bulk water removal capability. However, at high air velocities (as the units are designed to be compact) these systems are typically limited to an F7 (EN779) dry particulate removal efficiency rating. If the environment is considered dusty then this configuration can have a limited filter life, produce high operating pressure losses and have reduced effectiveness against dry salts. As well as a need to replace filters on a regular basis, maintenance of the drain system on these units is also critical to operation, so overheads can be higher than desired. These VCV systems are therefore typically employed when salt is the main concern rather than a combination of salt and high dust levels.
To address issues that result from a combination of high concentrations of salt as well as high concentrations of dust, the latest high-velocity filtration systems are designed with extra filtration stages that provide very high small particulate removal efficiency with hydrophobic properties; meaning they prevent liquid penetration while still capturing fine (< 3µm) dust and dry salt particles. These F8 (EN779) to H13 (EN1822) rated high-velocity filters can also be configured with deeper glass fibre filtration cells (24” deep) which means that although turbine inlet air velocity is high, the air velocity at the media is similar to low and medium velocity systems. This increases filtration efficiency and reduces pressure loss across the system. The thicker filter media has the added benefit of being less prone to blockage than thinner, high-efficiency alternatives.
Testing salt efficiency removal
Ultimately, whatever the ppm of salt in the air inlet, the more that is removed the better the turbine is protected from deteriorating performance and catastrophic failure. However, salt leaching rates are not covered in standard efficiency tests (EN779, ASHRAE 52.2, EN1822, JIS Z8122). The only real test of the effectiveness of an inlet filtration system is the performance of the turbine over time in the variety of environmental conditions it faces. To simulate the real world, Parker (CLARCOR) created a hydrophobic salt test protocol to help determine salt removal efficiency and in order to correctly and realistically evaluate new filter system designs when they are subject to variations in salt concentration, dust concentration and relative humidity. Specifically designed to test for phenomena such as salt leaching, the test takes the filter through a total of nine wet/dry cycles in a ten-day testing protocol.
The test requires that the filter(s) are clamped and installed as they would be on site. This ensures that the seal and clamping system are not weak points in the unit where liquid and contaminants can bypass the filtering media itself. Salt is first introduced into the test as an aerosol. Repeated tests are then completed (10 days’ worth) when the filter is loaded with dust. This adds back pressure to the system while the dust coats the fibres within the media as it gets captured, simulating real-world particulate build up. This combination of salt aerosol and loaded filter is very important to analyze as captured dust often acts as an alternative flow path for wet salt transfer downstream, in effect acting as a shortcut for wet salt transmittal downstream, bypassing the media!
Testing a filter system in this way provides comprehensive data about performance over time including the amount of water and salt that passes through the filter during various test stages and highlights any pressure loss increase that occurs. There are two widely used filter tests with accepted ratings used in the filtration industry – the EN779 standard and the EN1822 standard. The EN779 test standard has a set of criteria that a filter must meet to achieve a certain rating. Depending on the filter, a rating of G1-G4, M5-M6 or F7-F9 will be given. The higher the rating, the more effective (typically) the filter. The EN1822 standard is used to test higher efficiency filters, in the EPA/HEPA range, and produces a ratings scale of E10-E12, and H13-H17. When the multi-stage hydrophobic high-velocity system was tested against this salt test protocol, it showed salt removal efficiency to be improved by a factor of 10,000 compared with traditional M6 (EN779) units, giving an E11 (EN1822) efficiency rating with similar pressure loss to a standard M6 (EN779) efficiency system. Such units have also been proven to reduce the frequency of offline turbine water washes by up to a factor of 6 (from around four weeks to six months) without creating sudden pressure spikes.
No single filtration solution is right for all installations
Understanding the nature and impact of salt is a vital consideration in designing a filtration system for use in offshore or coastal environments. Systems need to be tested and evaluated for their performance in handling wet, dry and sticky salt to protect turbines from serious damage without sudden pressure spikes. If filters are selected solely on efficiency rating, operators may be left with systems that are difficult to maintain and, although higher rated, may not protect assets as well as lower efficiency solutions. With a careful assessment of conditions and selection of filter configuration, modern filtration solutions have been shown to virtually negate corrosion of turbine blades over 20,000 fired hours in real-world conditions.
About Parker Gas Turbine Filtration Division
Parker Hannifin supplies a full range of inlet systems and filters engineered to meet your operating goals, including:
We are the choice for advanced filtration for new units and replacement filters. Our inlet system designs include self-cleaning (pulse) and static inlet systems for all gas turbine OEMs. We supply a full range of filter types at all efficiency levels. The predictable and reliable performance of our air filters significantly reduces compressor contamination and the need for unplanned maintenance.
This article was contributed by Peter McGuigan, global LNG market manager, Parker Gas Turbine Filtration Division. It was originally published in Gas Turbine World, September 2017.
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How to Avoid Gas Turbine Shutdowns in LNG Processing Facilities
The Importance of Using the Right Filtration in LNG Production
Floating liquefied natural gas (FLNG) vessels are processing facilities that float above offshore gas fields. They treat and process natural gas using marine versions of the same technologies found on a land-based LNG plant -- only much more compact – floating LNGs are approximately 1/4 the size for the same LNG output. They offer operators the ability to process gas at or very close to the source field. The value of FLNGs is that they can tap into smaller and more remote fields. When a resource is exhausted, they can be unmoored and reconfigured for a new feed gas composition range and/or consumer non methane component specification and can be moved to another location to continue operations.
Offshore operation underscores the importance of maintaining the reliability of equipment on these vessels for extended periods. Operational shutdown of a key piece of equipment, such as a gas turbine (GT), can cost millions of dollars per day in lost production. Limited personnel and access to spare parts could mean further delays. Continue reading to learn more about the benefits and challenges of FNLGs as well as recommendations to ensure dependable GT operation.
The benefits
The benefits of operating and processing gas offshore, at source, using a nonpermanent structure are clear.
The challenges
Space is the biggest challenge facing FLNG engineers. LNG production requires a large amount of specialized equipment, including pretreatment systems, gas turbines, compressors, expanders, head exchangers, etc. Storage space for the LNG in its super cooled stage and natural gas liquids (NGLs) is also necessary. On top of that, all the systems and facilities needed for the ship and crew must be considered.
In contrast to land-based sites where designs may be considered as field proven, layout optimizations, design experiences, and engineering best practices with regards to implementing FLNG production are still relatively new and are evolving. To date, only a handful of FLNG production vessels have been commissioned - Petronas’ FLNG Satu and Dua, Golar’s Hilli Episeyo, Exmar’s Tango FLNG, and Shell’s Prelude. Projects currently under construction include Golar’s Gimi and ENl’s Coral South.
The importance of maintaining equipment
The refrigerant compressors hold the key to maximizing production. In most cases, refrigerant compressors are mechanically driven (rotated) by gas turbines. That said, the reliability of the GT becomes equally critical to production. Aeroderivative GTs are preferred as refrigerant compressor drivers over frame engines because they are smaller and lighter and have components that are quick and easy to interchange, making maintenance easier. They are also designed to offer high reliability, and can be quickly ramped up and down, allowing for any forced interruptions caused by adverse weather conditions to not have a prolonged effect on
production.
Gas turbine air intake system
One key piece of GT equipment is the GT combustion air intake system. GTs take in huge amounts of air as part of their combustion process. Air that is left untreated contains several destructive contaminants, which can cause serious damage, erosion, corrosion, and fouling of the precision engineered GT internals. The harsh weather conditions found in offshore environments are particularly brutal on any piece of equipment, let alone one that needs to run continuously.
Gas turbine filtration requirements
Issues relating to the ingestion of ambient air particulate, salts and hydrocarbons account
for 60 - 80% of overall gas turbine losses. Controlling these contaminants with the right air intake filtration is a huge step in assuring reliable plant operations and maximizing LNG output for extended intervals.
Salt
Salt is particularly damaging to the GTs on FLNGs because there is such a large quantity of it churned up from the sea. While the filterhouse and internals are typically manufactured from 304 or 316 grade stainless steel, sodium from sea salt (NaCl), if allowed to get downstream of the filters, will combine with sulfur in the fuel to create sodium sulfate (Na2SO4). This chemical reacts with the base metal of the turbine blades in the high temperatures of the hot gas path, causing rapid corrosion and component failures. This is a common effect known as hot corrosion or sulfidation. Chlorine in the salt also acts as a pitting corrosion initiator in colder parts of the turbine, potentially leading to catastrophic damage.
Because of its hygroscopic nature, salt can be difficult to control. It readily absorbs water and can easily move from solid to liquid form with changes in ambient relative humidity.
Filtration recommendations to defend against salt contamination:
Sand and dust
Sand and dust can cause numerous issues for an installation in terms of both damage to machinery and degradation of turbine performance. Large dust particles greater than 2μm in size can cause erosion and affect turbine efficiency. If the erosion causes parts in the front end of the equipment to fail, contaminants may travel through and cause severe machine damage.
Finer dust can stick to parts of the machine and change the operating aerodynamics. This, in turn, reduces turbine efficiency, requires online and eventually offline water washing, reduces availability, and increases operational costs. Moisture in the inlet air stream can combine with dust to form mud which can block a filter.
Filtration best practices for sand and dust:
Turbine air inlet filtration system design considerations
There are several factors that should be considered in the design of an FLNG turbine air inlet system:
Conclusion
To ensure profitability, the reliability of the systems used to liquefy gas onboard an FLNG vessel is critical and, although GT filtration systems may seem like a smaller part of the overall puzzle, they are vital to ensuring ongoing smooth operations. GT air intake systems need to be designed for the real-world environment in which they will be used.
They must also be able to effectively and efficiently handle a diverse range of seasonally varying contaminants such as salt, dust, oily hydrocarbons, and moisture. For FLNG vessels, it is essential that these systems are physically compact and flexible enough to allow operators to easily change filter types depending on location. Designing GT air intake solutions for the offshore environment requires a thorough understanding of the very specific challenges such systems will face, but when undertaken correctly offers operators a rapid return on investment.
This post was contributed by Pete McGuigan, global LNG market manager, Parker Gas Turbine Filtration Division, Parker Hannifin Ltd, UK.
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For more information on filtration requirements for FLNG gas turbine air intake systems, read the white paper “Fine-Tuning Filtration for FLNG”
