Tractor Hydraulic Pump PTO Drives

T55

T55 HYDRAULIC PUMP DRIVE FOR AGRICULTURAL TRACTOR P.T.O.

MACHINED STEEL CASES – Just like the T33 pump drive or T55 has been designed with a heavy duty gear case construction. Some of our competitors pump drives with Aluminium cases fail at high temperatures due to expansion and the outer bearing ring spinning displacing particles of aluminium which destroy the bearings.

MODEL T55 – The new model T55 builds on our years of engineering experience with PTO pump drives. The T55 was developed for use where a pump drive larger than our T33 is required. Using similar design as our popular T33 the pump drive is a directly driven hydraulic pump speed increaser for 1000 RPM tractor PTO shafts.
The T55 Model is built with a 1 3/8” 21T spline hollow shaft. Internally, oil direction vanes are fitted for improved bearing lubrication. There are external fins in the lower section for additional cooling. Shafts are splined internally for full length for through drive. Normal practice is to utilise a torque arm to restrain the drive from rotation.

Maximum power is 75kW (100HP) at 1000 RPM input. The T55 is available to accept most SAE “B”, SAE “C” or SAE “D” hydraulic pumps. Pump adaptors on the T55 may be changed in the field.

For more information download the page from our catalogue.
T55 PTO pump drive.pdf
DYNAGEAR PT5 Catalogue

T33

T33 HYDRAULIC PUMP DRIVES FOR AGRICULTURAL TRACTOR P.T.O.

CAST IRON CASES – Unlike our competitors, we utilise cast iron gear case construction. Cast iron expansion at the high temperatures encountered with this application is near equal to the expansion of the bearings and the outer bearing rings are retained in the case. Aluminium cases with high heat expansion often fail due to the outer bearing ring spinning and displacing particles of aluminium which destroy the bearings.

MODEL T33 – These models embody over 20 years of engineering experience with PTO pump drives. They were developed for use as directly driven hydraulic pump speed increasers for 540 or 1000 RPM tractor PTO shafts. Models for 540 RPM PTO’s are provided with a 1 3/8″ 6T spline hollow shaft and for 1000 RPM PTO’s, a 1 3/8″ 21T spline hollow shaft. Shafts are splined internally for full length for through drive. Normal practice is to utilise a torque arm to restrain the drive from rotation.
Maximum power is 50 horsepower with the 1:3.31 ratio models at 540 RPM input and 65 Horsepower in the 2.04 ratio models at 1000 RPM input. The T33 is available to accept most SAE “A”, SAE “B” or SAE “C” hydraulic pumps. Pump adaptors on the T33 may be changed in the field.

MODEL T33I – This model was developed for use as an implement mounted hydraulic pump speed increaser for 1000 or 540 rpm tractor PTOs where thrust loads from PTO shafts are encountered. Tapped mounting holes are provided or a factory fitted base mounting bracket can be supplied.
Maximum power is 50 horsepower with the 1:3.31 ratio models at 540 rpm input and 65 Horsepower with the 1:2.04 ratio models at 1000 rpm input. The T33I male shaft input model is available to accept most SAE “A”, SAE “B” or SAE “C” hydraulic pumps. Pump adaptors on the T33I may be changed in the field. The T33I male shaft input & output model is supplied with a 1 1/2″ x 3/8″ keyed output shaft.

For more information download the page from our catalogue.
T33 PTO pump drive.pdf
DYNAGEAR PT5 Catalogue

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