Destination:
The gearbox belongs to the mechanical transmission from the chassis truck drive engine to the duplex pistons pump.
This gearbox permits the achievement of 3 speeds for the duplex pistons pump and is provided with one additional output shaft with 2 speeds for water pump drive.
Constructive characteristics:
The gearbox shafts are mounted in the separating plane of the housings, on the oscillating-radial bearings which do not require later adjustment.
The gears are cylindrical with inclined teeth, tempered on the flankes and grounded.
The free gears are on bronze bushings.
The gearbox is provided with two coupling devices:
For safety in operation, the coupling devices are provided with locking systems for all the working positions.
Technical characteristics
Gear ratio
| Speed | For triplex pump | For water pump | |||
| I | II | III | I | I | |
| Ratio | 10,069 | 5,357 | 2,964 | 1,763 | 0,857 |