High pressure gear pumps with side and rear ports wich gives ample mounting. Bi-directional, pressure plates in bronze and nodular cast iron body for high working pressures. Flow from 11cc to 150 cc. Those pumps can be mounted directly in most of PTOs in the world.
In case of doubts during or before assembly, please contact to Bezares After Sales Service
Both, clock wise and counter clock wise with internal drainage
Units subjected to axial or radial loads must be fitted on a external coupling
with bearings which support axial and radial loads.
Torque tightness setting for fixing bolts
M10 – 50±5Nm
M12 – 85±5Nm
1/2″ – 85±5Nm
Torque tightness setting for hydraulics fittings
1/2” BSP – 60±5Nm
3/4” BSP – 90±5Nm
1 1/4” BSP – 200±5Nm
1 1/2” BSP – 250±5Nm
The shaft spline of the pump must be lubricated with heat-resistant grease
when the PTO is assembled with a built-in shaft seal. (See example in drawing)
Use exclusive good quality hydraulic oil with anti-foan and anti-wear additives. The specification of the fluid must conform to DIN 51524 / 51525 (type HLP)
Please, use the following guidelines to choose the correct oil grade:
Permissible: 8 – 800 cSt
Recommended:
10 cSt Very cold climate
32 cSt Cold climate
46 cSt Temperate climate
68 cSt Hot climate
Temperature:
Min -15ºC / Max 80ºC
Cold Start: -25ºC to -15ºC
Clockwise rotation
Counter Clockwise rotation
Filtration
Suction line: Not recommended
Return line: 10 to 25 µm
A contamination level according to ISO 4406 is recommended to maintain in the filtration system.
Find out and eliminate the source of trouble (wear accuring in normal operation, dirty fluid, load applied to drive shaft, operating conditions not observed)
BE Troubleshoot table
| wdt_ID | Source of trouble | No fluid delivery | Insufficient pressure and / or volumetric flow | Strong or adnormal noise | Foaming in hydraulic tank | Fluid leakage at drive shaft | Fluid temperature too high |
|---|---|---|---|---|---|---|---|
| 1 | Insufficient fluid level | X | X | X | |||
| 2 | Low input pressure | X | X | ||||
| 3 | Suction line leaky | X | X | X | X | ||
| 4 | Faulty shaft seal ring | X | X | ||||
| 5 | Gear pump faulty | X | X | X | |||
| 6 | Coupling faulty | X | X | ||||
| 7 | Wrong direction of rotation | X | |||||
| 8 | Relief valve incorrectly set | X | X | ||||
| 9 | Vibrations | X | |||||
| 10 | Piping faulty, wrong control position | X | |||||
| 11 | Operating conditions (Fluid Temp, viscosity, pressure duration of load) and / or input power not in compliance | X | X |