REPTO

REPTO Application Requirements
The Rear Engine Power Takeoff (REPTO) is well suited for use in mixer, fire pump, refuse, and other specialty vehicles that have power takeoff requirements.

Using a REPTO can eliminate the need for a front mounted or transmission mounted power takeoff. REPTO simplifies charge air cooler and radiator design requirements.

Gear rattle and noise must be evaluated on each new configuration to determine if a torsional coupling is required. Noise is usually worse at light loads and low speeds.

The REPTO is best suited for driving hydraulic pumps. Vane and gear pumps have inherent low inertia, damping and low noise. Piston type pumps may be marginal and should be checked for gear rattle and noise. 

Centrifugal pumps, pulleys, electric clutches and other driven components with inertias above 2.50 lb/ft² often require one of the following torsional couplings to reduce rattle and noise:

  • Dana Spicer Vibradamp Drive Shaft
  • Stahl Dampers
  • Morflex Coupling
  • Centaflex Coupling

X12 REPTO
The X12 REPTO drive is structured as a customer selectable flywheel housing (FH) option and a selectable REPTO accessory drive (DR) option. Power is transmitted to the output shaft through the base engine rear geartrain. The output shaft assembly has a rear facing four bolt flange connection that is designed for common Spicer driveshaft assemblies. The flange rotation is opposite the engine crankshaft direction and has a ratio of 1.18 times engine speed. The REPTO option adds approximately 38.5 kg (85 lb) to the engine base weight.

The REPTO option actual intermittent and continuous torque values appear in the FH/DR options notes (typical limits are 700 Nm (516 lb ft) of intermittent torque and 632 Nm (466 lb ft) of continuous torque). Maximum ratings may be used for intermittent load applications where the average load does not exceed the continuous rating and where full throttle operation does not exceed 60 minutes without interruption.

The PTO is designed for remote mounted pumps or similar, low inertia driven devices.
If the driven pump has rotating inertia above 0.038 kg-m2 (0.34 in-lb-s2) a torsional coupling must be selected for the PTO driveline. In this case, the coupling supplier or OEM must submit torsional system analysis, historic application data and/or test results for approval of the REPTO drive as part of the IQA documentation.

L9/L9N REPTO
The REPTO is integrated into the engine flywheel housing, which is about 3 inches longer than a non-REPTO flywheel housing. The output flange faces rearward and is mated to the desired accessory drive via a four-bolt flange connection (1350/1410 Spicer type flange) or optionally for the C/L engines, a SAE C size pump flange.

The output rotation is the same direction as the engine. The gear drive ratio is 1.15:1 (REPTO speed is 1.15 times engine speed). The design is capable to 435 lb-ft of continuous torque and a maximum rating 520 lb-ft of torque intermittently. Maximum ratings may be used for intermittent load applications where the average load does not exceed the continuous rating and where full throttle operation does not exceed 60 minutes without interruption. The total weight of complete assembly of REPTO is 150 lb.

ISX12N REPTO
The REPTO Drive is integrated into the rear gear train with the drive unit bolted directly to the gear housing. The output flange faces rearward and is mated to the desired accessory drive via a four-bolt flange connection. The output of rotation is the same direction as the engine for all mounting options. The gear drive ratio is 1:1.32. The design is capable to 466 lb-ft of continuous torque and a maximum rating 520 lb-ft of torque intermittently.

Maximum ratings may be used for intermittent load applications where the average load does not exceed the continuous rating and where full throttle operation does not exceed 60 minutes without interruption. The total weight of complete assembly of REPTO is 185 lb.