Logan self-adjusting Bell Housing PTO clutches have been standard equipment on all Oshkosh H-Series Blowers manufactured since 2005. Hundreds of Logan units are in the field, operating at a high level of excellence and readiness for major U.S. Airports such as Chicago OHare, Boston Logan, Cleveland-Hopkins, Buffalo Airport, and more.
The Logan Advantage: The advantage of the Logan clutch is its ability to engage the snow blower drivetrain hydraulically (for factory blower trucks), and pneumatically (for pre-2005 H-Series field retrofits). This eliminates the use of a mechanical hand lever or yoke type clutch engagement system, which requires frequent mechanical adjustments many times during snow removal conditions, which leads to downtime and inconsistent operation. For example, mechanical clutches that were improperly adjusted, often led to disc wear and eventual clutch failure requiring the truck to be taken out of commission, requiring many hours to pull the blower trucks drivetrain
A major harbor tug operator in the US had a need to up-grade some of its old Detroit Diesel driven Gensets. This operator has the hydraulic requirements for the boat and deck winches provided by two hydraulic pumps mounted on the front of two redundant Gensets. (This is an alternate solution to main engine mounted hydraulic pumps and allows for the hydraulic systems to be run at the dock and without the mains being operated.)
In normal operation, one genset provided all of the ships power. The second genset provided all of the ships hydraulic requirements. In an emergency where additional electricity or additional hydraulic pump flow was required, the second unit could be used to provide additional resources. In the event of a failure, one genset could provide enough electricity and hydraulic flow for the boat to still operate until the first unit could be repaired, keeping a valuable piece of equipment operating and providing revenue. The clutch allowed the pump not being used to be
Logan was the partner with LightningHybrids of Loveland CO on a recently brought to market round-town delivery truck. The system is particularly well suited to heavy stop start duty trucks saving up to 40% of the fuel.
LightningHybrids had the unique idea of a hydraulic hybrid. Energy is stored in a hydraulic accumulator and used during acceleration. LightningHybrids demanded a long and reliable duty cycle with performance that didnt change over time. Additionally they need a part that would offer all the value at a price that could be sold to a price sensitive fleet owner for retrofit into existing equipment.
In the prototype stage LightningHybrids found that the Logan Units could work as required. Ever demanding they, investigated competitors but in the end returned to the Logan product because of Engineering support, manufacturing capacity and proven performance at a value price point.
The Logan S35 was heavily modified to fit into the existing envelope. Logan Engineers worked
Water blasting trucks quickly and completely remove all types of durable traffic markings from asphalt and concrete applications on roadways, airports, parking lots, with up to 40,000 psi. (2700 bar) of water pressure. The simultaneous jetting and vacuuming of the remnant material, minimizes damage to surfaces and eliminates secondary clean-up. Logan flywheel mounted, hydraulically actuated, Bell Housing PTO clutches are an ideal option, and available in No. 00 No. 5 size flywheel; fitting engines with HP ranges from 50 1000 HP. Self-adjusting, smooth engagement and disengagement, as well as remote activation, make the Bell Housing PTO ideal for diesel and spark ignited engines for mobile applications.
OEM Manufacturer of Construction Equipment Works Together with Logan Application Team
The Challenge: Before
OEM contacts Logan to solve system issues which are causing hydraulic pump failure
Most OEM manufacturers of mobile equipment use hydraulic piston pumps to control machine movements and attachments. In many cases these hydraulic piston pumps are driven remotely from the engines auxiliary PTO drive via a slip yoke shaft. Machine Operators must be able to turn these pumps on and off when the vehicle is driven from job site to job site - in order to prevent over speeding the pump when the engine is running faster than the pumps normal hydraulic work speed. There is also the potential for all the pumps to engage at once, which would cause the input torque rating to be above the engine specifications causing hydraulic system and pump failure. In this situation, customers were going beyond the limits of the machine and pump specs the OEM had to do something quickly -they contacted
Standard Logan Bell Housing PTOs are available in No. 00 to No.7 size SAE Bells. This application required a Logan LC-314 (No. 01 Size Bell), Clutch for main propulsion and a Logan SAE Direct Drive PTO (1000 series) to drive an auxiliary pump with an SAE C spline off the front of the engine.
In this example, the customer has developed a skid mounted drive system, with a Heavy-duty side load requirement. Logan Engineers specified a Generation II LC-314 due to its spread bearing design. The Logan Gen. II handles 50% more side load than a standard Gen. I 314 Design. Also, the Gen II does not require a pilot bearing, which is prone to failure in heavy duty side-load applications.
The Logan Gen. II LC-314 transmits a maximum 4420 lb. ft. of torque (5993 Nm) @ 435 psi. (30 bar), providing ample safety factor in this application which only requires 3094 lb. ft. (4195 Nm).