Typical Applications

Logan PTO Clutches When Used With Shaft Adapter Option

Logan PTOs provide live engine power for auxiliary pump drives - through a separate PTO drive shaft. The Logan direct drive PTO clutch bolts directly to the OEM's Cardan Shaft (using a Logan shaft adapter), providing onn-off engagement of auxiliary drives or pumps in this example.

Mobile Equipment

Logan PTOs are designed to mount between the power take-off pad of the engine and attachment or pumpdrive

Logan Advantages

• PTO is powered directly from the crankshaft, behind the engine's flywheel.
• Does not require extended front frames, modified bumpers, brackets, radiatiors, and drive couplings associated with front PTOs
• Eliminates exposure of the PTO and pump to front-end collision damage.

Power Take-Off Mounting Options - Industrial/Mobile Equipment

Logan SAE PTO Clutches can be directly mounted to a diesel / gasoline / combustion engine flywheel using a flexible coupling and mounting plate configuration. Standard sizes include SAE No. 3 to No. 7 Bells wqith input torque ratings from 159 lb. ft. (216 Nm) to 3000 lb. ft. (4068 Nm). Clutch actuation pressures range from 100 psi (6,9 bar) to 320 psi (22,1 bar) for standard models. Applications include: Main and Auxiliary drives and gensets, hydraulic drive systems, blowers, vacuums, fans, winches, reels, and hoists.

Cummins QSB7 6.7 liter Diesel Engine (up to 282 HP)

Logan Direct Drive Power Take-Off (PTO) Clutches for Oil and Gas Applications

In this Oil & Gas vehicle application, the Logan SAE 600 series Direct Drive PTO is mounted on a typical  2-pad live PTO pump pad, sandwiched between a CAT 3412 Diesel Engine and an Allison 8900 Series Transmission. The Logan 600 series Direct Drive Power Take-off (PTO) clutch will connect or disconnect the single and tandem pumps mounted to the live PTO pump pad. The pumps are used only on the job site, and remain disconnected (via the Logan PTO) when the vehicle is idle and not in use, or when driving to and from the job site. This option to clutch-in and clutch out the pumps minimizes wear and tear on the pumps, reduces unnecessary fuel consumption, and the chances of over speeding the pumps (since they are disconnected from the drivetrain) when the vehicle is at highway speeds during transport. 

OEM Manufacturer of Construction Equipment works together with Logan Application Team

The Challenge

OEM contacts Logan to solve systemic issues which are causing hydraulic pump failure

Most OEM manufactureers of mobile equipment use hydraulic poston pumps to control machine movements and attachements. In many cases these hydraulic piston pumps are driven remotely from the engine's 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 prvent overspeeding the pump with the engine is running faster than the pump's 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 Logan.

Before :

Customer experienced pump over-speeding between job sites, causing system failure, warranty claims and downtime.

The Solution

Logan adapts off the shelf SAE PTO Clutch to meet specific OEM customer need

In most cases the pumps are already defined by the customer, which requires Logan to fit with small envelopes, sandwiching the Logan Clutch in between the pump and engine, requiring a Logan shaft adapter to support the cardan/drive shaft connection. After considering all of the options with Logan application engineers, the OEM selected an SAE PTO 1200 Series Clutch. In less than a week, extensive lab and field tests were conducted. Results were positive. The OEM quickly created space to sandwich the Logan Clutch between the driveline and the piston pump - thereby eliminating the possibility of over speeding the pumps. This solution enabled the OEM to keep its customer base happy by eliminating unnecessary machine downtime.

Logan Direct Drive Power Take-off (PTO) Clutches

How They Work:  

Direct Drive PTO’s are self-contained, fluid or air activated clutches, positioned between a live PTO pad and hydraulic pump.

PTO Clutch Advantages:

• Reduces fuel consumption and CO2 emissions by engaging drives and pumps only when required
• Better Engine Starts: Reduces horsepower draw and cranking power required during machine start-up by disconnecting the hydraulic system from the engine
• Reduced ambient noise through intermittent use of pumps and equipment
• Cooler running hydraulic systems: Heat is generated whenever oil dumps from high to low pressure without producing work. Disconnecting the PTO Clutch reduces the destructive effects of heat – lowering maintenance costs and hydraulic
• oil service requirements
• Extends the life of drive systems and components
• Standard PTO clutches available in B, B-B, C, C-C, and other popular sizes

FlexaDrive^TM 2-position Pump Drive System For Engines up to 730 HP (554 kw)

The Logan 2-Position Pump Drive is outfitted with up to four (4) PTI / PTO pads, and can accommodate up to 730H (544 kW) Engines, with maximum Speeds up to 2600 RPM, and a maximum of 160 HP (120kW) per tower under continuous duty.

• Input Housing SAE No. 1 – No. 3
• Output Housing SAE No. 3
• Pump Pads SAE A – SAE C
• Continuously Rated – Total 300 Hp (225Kw)
• Continuously Rated – Per Tower 160 Hp (120Kw)
• Integrated Reservoir
• SAE J1939 Compatible

Logan FlexaDrive^TM Multiple Pump Drive Systems

Logan FlexaDrive^TM Systems: 

The Logan FlexaDrive: is a multiple pump drive system, sandwiched between your engine and clutch, or transmission, allowing up to ten (10) live PTO / PTI pumps pads for a wide range of requirements such as drive shafts, pumps, pulleys, and clutchable power take-offs.

Logan FlexaDrive^TM Systems:

The Logan FlexaDrive: is a multiple pump drive system, sandwiched between your engine and clutch, or transmission, allowing up to ten (10) live PTO / PTI pumps pads for a wide range of requirements such as drive shafts, pumps, pulleys, and clutchable power take-offs.

Logan FlexaDrive^TM Advantages:

• Significantly reduces diesel engine operating hours, emissions, fuel consumption and engine maintenance
• Hybrid ready feature allows for variable speed motor generator(s) to provide low power propulsion during standby or transit
• Variable speed motor generator can act as a Genset or increase Bollard Pull during ship assists
• Up to ten (10) live PTO / PTI positions 
• Up to five (5) cartridge style pump drive towers (up to 200 HP / 150 kW for each tower – 600 HP total) for current requirements and future scalability 
• Flexible couplings in SAE 11.5”, 14”,18” and 21” flywheel sizes
• For engine capacities from  200 HP (150 kW) up to 5000 HP (3700 kW) @ 2600 RPM
• Short axial length – Full torque transmission