Marley® Geareducer®: M Series
Lower Maintenance Costs
Marley® M Series Geareducers® require fewer oil changes compared to others that require oil changes multiple times each year.
Long Life Bearings are Standard
All Marley bearings have 100,000 hours minimum L10A service life.
Thicker Housings
Marley M Series housings are 40% thicker.*
Greater Surface Area
Marley M Series Geareducers have 25% greater external surface area than other manufacturers**
Larger Oil Passageways
Marley M Series have 3x larger oil passageways than other manufacturers.***
Integral Pinion Shaft
Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength, while other manufacturers may use multiple piece pinion arrangements.
Premium Oil Seal
Marley M Series utilize a premium Inpro seal on input shaft to eliminate grooving and promote long life.
Premium Shims
Marley M Series use steel shims at all necessary casting connection points to maintain bearing settings as the unit ages.
Lower Installation Costs
Marley does not require external vent lines, while others do.
Superior Reliability
Marley M Series are designed to be simple, without the need for oil pumps, filters, or other options that add complexity, additional maintenance and potential for failure.
*Marley M1712 castings are no less than 7/8” thickness while Amarillo 1712 castings are no less than 5/8” thickness.
**Amarillo 1712 vs. Marley M1712; Amarillo surface area based on actual measurements of case with estimations given to account for curved faces. Result is 4,086 sq. in. surface area for Amarillo 1712 vs. 5,108 sq. in. for Marley M1712.
***Marley M Series oil passageways are no less than ¾” diameter while Amarillo passageways can be as small as ¼” diameter.
Head-to-Head Comparison
| Marley | Amarillo* | ||
|---|---|---|---|
| Oil should be replaced every 3,000 hours | OIL CHANGES | Original oil should be replaced after just 500 hours or 4 weeks of operation. Afterwards, intervals of 2 or 3 months may be required for a very moist atmosphere**, resulting in up to $1,419 more in annual oil change costs | |
| Marley Geareducers use double row interstage shaft bearings that yield 3x the bearing life of single row bearings*** | BEARING LIFE |  |
Amarillo uses single row interstage shaft bearings**** |
| Marley M1712 has 40% thicker housing for robust lower bearing support and reduced sound/vibration | HOUSING THICKNESS |  |
Amarillo 1712 has thinner housings |
| Marley M1712 has 25% more surface area and 3x larger oil passageways than the Amarillo 1712 | TEMPERATURE |  |
Amarillo 1712 has less surface area than Marley M1712, along with smaller oil passageways |
| Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength | INTEGRAL PINION |  |
Amarillo 1712 may use a keyed gear for connection to the pinion shaft, resulting in multiple components and increased stress concentrations |
| Marley M Series utilize a premium Inpro seal on input shaft to eliminate grooving and promote long life | OIL SEAL |  |
Amarillo standard lip type seals wear against the input shaft which can cause grooving over time that may require complete shaft replacement |
| Marley M Series use steel shims at all necessary casting connection points to maintain gear settings as the unit ages | SHIMS |  |
Amarillo uses plastic shims that are more susceptible to fatigue and may lead to bearing setting changes over time, which can impact sound, vibration, wear, and life of unit |
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Reference: |
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| * | Amarillo is a registered trademark of Amarillo Gear Company. | |
| ** | Per Operation and Maintenance Instructions for Amarillo Cooling Tower Drives OMC 8/15. | |
| *** | Based on current Timken bearing rating method for Marley Series 4000 vs. Amarillo 1712. | |
| **** | Marley M1712 castings are no less than 7/8” thickness while Amarillo 1712 castings are no less than 5/8” thickness. |
Marley® Geareducer®: New
Lower Maintenance Costs
Marley® System 5™ Geareducers® require only one oil change every 5 years compared to others that require oil changes multiple times each year.
Long Life Bearings are Standard
All Marley bearings have 100,000 hours minimum L10A service life.
Lower Sound
Third party* verification of 5 to 7 dBA reduction compared to other gearbox manufacturers. A 7 dBA reduction translates to 80% lower overall sound.**
Cooler Operating Temperatures
Marley Geareducers have up to 47% greater surface area than other manufacturers, along with larger oil passageways to ensure maximum service life.***
Integral Pinion Shaft
Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength, while other manufucturers will use multiple piece pinion arrangements.
Lower Installation Costs
Marley does not require external vent lines, while others do.
Excellent Availability
Marley stocks over 75 models with over 200 assembled Geareducers ready to ship.
Value Added Options
Low level oil indicator switches, anti-reversing devices, oil seal options.
*National Technical systems (NTS) in 1998. Concurrent testing was conducted on Marley and Amarillo gear speed reducers in accordance with SAE J2101 at various speeds and loads.
**Lw = 10 log 10 (W/10^-12) dB)
***Amarillo A36 vs. Marley 36; Amarillo surface area based on actual measurements of case with estimations given to account for curved faces. Result is 5,173 sq. in. surface area for Amarillo A36 vs. 7,586 sq. in. for Marley 36.
Head-to-Head Comparison
| Marley | Amarillo® | |
|---|---|---|
| Marley System 5 Geareducers allow you to operate 5 years before changing the synthetic oil. | SINGLE REDUCTION OIL CHANGES | Original oil should be replaced after just 500 hours or 4 weeks of operation. Afterwards, intervals of 2 or 3 months may be required for a very moist atmosphere*, resulting in up to $3,636 more in annual oil change costs |
| Oil should be replaced every 3,000 hours | DOUBLE REDUCTION OIL CHANGES | Original oil should be replaced after just 500 hours or 4 weeks of operation. Afterwards, intervals of 2 or 3 months may be required for a very moist atmosphere*, resulting in up to $1,419 more in annual oil change costs |
| Marley Geareducers use double row interstage shaft bearings that yield 3x the bearing life of single row bearings** | DOUBLE REDUCTION BEARING LIFE | Amarillo uses single row interstage shaft bearings ** |
| Marley 32.2 is 87 dBA (7 dBA less than the Amarillo A32, which translates to 80% lower sound) | GEAR SOUND (BASED ON THIRD PARTY TEST RESULTS) | Amarillo A32 is 94 dBA |
| Marley 36 has 47% more surface area and larger oil passageways than the Amarillo A36, to ensure maximum service life | TEMPERATURE | Amarillo A36 has less surface area than Marley 36 along with smaller oil passageways |
| Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength | INTEGRAL PINION | Amarillo A36 has a keyed gear for connection to the pinion shaft, resulting in multiple components and increased stress concentrations |
| Geareducers do not require an external vent line | VENT LINE | An external vent line is required in “wet towers”* |
**Based on current Timken bearing rating method for Marley Series 4000 vs. Amarillo A36.
Marley® Geareducer®: Rebuild
OEM Rebuild Facility
Marley® System 5™ Geareducers® require only one oil change every 5 years compared to others that require oil changes multiple times each year.
OEM Components
Only the same long life, low sound components such as seals, bearings and gear sets found in new Marley Geareducers are used in the repair process.*
Factory Testing
All units are factory dyno-tested under load to simulate operating capacity required in the cooling tower.
Lead Time
By stocking components and cores, Marley provides flexibility to meet your specific needs with short lead times.
Core Credit
Customers will receive a credit for each Geareducer core returned to Marley, with purchase of New or Rebuilt unit.
Cost Optimization
May provide the lowest cost option that will still deliver Marley OEM performance.
Warranty
Marley provides a one-year factory warranty, covering all components of the gearbox, including seals, bearings and gears.
Head-to-Head Comparison
| Marley Rebuild/Repair | Local/non-Marley repair shop | |
|---|---|---|
| All critical wear components are replaced, including seals, gaskets, bearings and gear sets | COMPONENTS | May re-use one or more critical wear components which could reduce operating life |
| The same long-life, low sound OEM components will be used in all rebuilt and repaired units* | OEM PERFORMANCE | May be replaced with 3rd party non-OEM components |
| All rebuilt and repaired Geareducers are factory dynotested under load prior to shipment** | QUALITY ASSURANCE | No OEM factory dyno-testing performed |
| Work is performed by experienced Marley technicians, supported by the Marley Geareducer engineering team | EXPERIENCE | Work performed by noncertified technicians with no Geareducer design or engineering experience |
| Units will be painted with the Marley specified primer paint, followed by two coats of Marley specified epoxy-polyamide paint | SURFACE CORROSION | Paint applied would be void of Marley OEM specifications |
| Marley provides a one-year factory warranty, covering all components of the gearbox, including seals, bearings and gears | WARRANTY | No OEM warranty provided |
*See the Marley advantages in the “Head-To-Head” comparisons, shown in the New Geareducer section of Proof In Performance
**The factory dyno-tested under full load ensures the gearbox has been re-assembled properly and is capable of running at the rated torque and horsepower
Marley® Geareducer®: Repair
OEM Repair Facility
Quality Marley® technicians will use the factory-designed tools, gauges, and
fixtures to meet all Marley OEM performance specifications.
Inspection Reports
For repaired units, a thorough analysis by Marley technicians will provide you with the information you need to make an educated decision on the future of your valuable Geareducer asset.
Factory Testing
All units are factory dyno-tested under load to simulate operating capacity required in the cooling tower.
OEM Components
Only the same long life, low sound components such as seals, bearings and gear sets found in new Marley Geareducers are used in the repair process.*
Cost Optimization
Gears and shafts will be replaced only if deemed necessary during the inspection.
Peace Of Mind
After installing a new Marley Geareducer, allow Marley to repair the old unit so you can maintain a spare Geareducer on site.
Shipping Costs
Freight costs for delivery and return covered by Marley.
Warranty
Marley provides a one-year factory warranty, covering all components of the gearbox, including seals, bearings and gears.
Value Added Options
Triple epoxy paint, oil seal options, anti-reversing devices. Repair units with existing value added options will be replaced in kind.
Head-to-Head Comparison
| Marley Rebuild/Repair | Local/non-Marley repair shop | |
|---|---|---|
| All critical wear components are replaced, including seals, gaskets, bearings and gear sets | COMPONENTS | May re-use one or more critical wear components which could reduce operating life |
| The same long-life, low sound OEM components will be used in all rebuilt and repaired units* | OEM PERFORMANCE | May be replaced with 3rd party non-OEM components |
| All rebuilt and repaired Geareducers are factory dynotested under load prior to shipment** | QUALITY ASSURANCE | No OEM factory dyno-testing performed |
| Work is performed by experienced Marley technicians, supported by the Marley Geareducer engineering team | EXPERIENCE | Work performed by noncertified technicians with no Geareducer design or engineering experience |
| Units will be painted with the Marley specified primer paint, followed by two coats of Marley specified epoxy-polyamide paint | SURFACE CORROSION | Paint applied would be void of Marley OEM specifications |
| Marley provides a one-year factory warranty, covering all components of the gearbox, including seals, bearings and gears | WARRANTY | No OEM warranty provided |
*See the Marley advantages in the “Head-To-Head” comparisons, shown in the New Geareducer section of Proof In Performance
**The factory dyno-tested under full load ensures the gearbox has been re-assembled properly and is capable of running at the rated torque and horsepower