Durst pump pads do not contain bearing cups. The advantage of this approach is that pump pads can be removed without disrupting the internal workings and alignment of the bearings and gears inside the gearbox.

 

 

 

Durst pump drives now use a four-disk drive plate. By using four thin disks, the drive plate becomes slightly wider and increases the rating. Thin disks are much more flexible. When put together, multiple disks absorb more engine vibrations than a single thick disk. The drive plate is no longer captured on the input shaft; instead, it is able to automatically adjust if any engine flywheel misalignment occurs, resulting in smoother operation and longer gearbox life.

 

Splines

Durst pump drives have a 29T-12/24 internal spline on the gears, allowing a spline adapter to be used on any SAE pump shaft. Since the pump shaft mating spline is not integral to the output gear, the mating pump shaft spline adapter can be replaced without the need to remove or replace the output gear. Plus the 29T-12/24 spline significantly reduces wear on both gears and spline adapters.

 

 

 

Durst pump drives feature special oil port locations and oil directing ribs that cause the oil to flow into the pump pad area, lubricating the spline adapters and bearings without the need for external pumps. Oil flows into the pump pad area, and then our patented cast-in recesses causes the oil to flow across the spline for wet spline operation.

 

The Durst pump drive input shaft engages the input gear through a 29T-12/24 spline. The input shaft is retained within the gearbox and allows the drive plate or torsional coupling hub to ride free on the input shaft, reducing misalignment stresses from the engine flywheel and the gearbox. It can be removed or replaced without disturbing the internal workings of the gearbox.

 

 

 

The heavy-duty ball bearings placed directly in the housing halves don’t require shimming, which drastically simplifies assembly. Any adapter can be easily attached without disturbing the gears or bearings in the gearbox. The gearbox can easily be split for servicing without removing the adapters.

 

Zero Offset Direct Drive

595

1,250

P

2,3,4,5,6

N/A (direct)

A,B,C,D,E

N/A

N/A

N/A

1751D

595

1,250

P

1,2,3,4,5

N/A (direct)

A,B,C,D,E

N/A

N/A

N/A

1PD06

495

1,040

P,C,S

0,1,2,3,4

1:1, 1.06, 1.18, 1.25, 1.32, 1.40, 1.48, 1.57, 1.67

A,B,C,D,E,F

6.00

 

1PD09

815

1,710

P,C,S

0,1,2,3,4

1:1, 1.12, 1.20, 1.30, 1.40, 1.70, 2.00

A,B,C,D,E,F

9.00