IE A092TEST-BENCH TRIAL REPORT, NII GIDROPRIVOD JSC
Hydraulic motor 410.56: less friction and leakage with no machine teardown
Pressure differential dropped, working fluid leakage decreased, scoring marks on the valve disappeared. 3.4× — pressure drop across the hydraulic motor, 12 → 3.5 kgf/cm²; 26 % — external leakage of the working fluid, 500 → 370 cm³/min (2001).
of NII Gidroprivod JSCfive signatories, stamps of the institute and of XADO LLC
Key results
| TEST OBJECT | CONDITION BEFORE TREATMENT | WHAT WAS MEASURED |
|---|---|---|
| Hydraulic motor 410.56, displacement 56 cm³ | Run in before the compound was added, readings stable; scuffing marks and scratches on the distributor surface | Pressure drop between inlet and outlet, external leakage of the working fluid |
Pressure drop between hydraulic motor inlet and outlet — by operating time
| OPERATING TIME | DATE OF MEASUREMENT | INLET PRESSURE P1 | PRESSURE DROP ΔP |
|---|---|---|---|
| 0 h | 23.05.2001 | 62 kgf/cm² | 12 kgf/cm² |
| 4.6 h | 24.05.2001 | 58 kgf/cm² | 8 kgf/cm² |
| 11.1 h | 25.05.2001 | 55 kgf/cm² | 5 kgf/cm² |
| 16.2 h | 28.05.2001 | 54 kgf/cm² | 4 kgf/cm² |
| 22.4 h | 29.05.2001 | 53.5 kgf/cm² | 3.5 kgf/cm² |
| 28.2 h | 30.05.2001 | 53.5 kgf/cm² | 3.5 kgf/cm² |
Outlet pressure P2 was 50 kgf/cm² in every measurement, rotation speed 110–118 rpm, readings taken at the morning start-up; pressure gauges of accuracy class 1.6.
External leakage of the working fluid at 60 °C
| MEASUREMENT | DATE AND TIME | LEAKAGE Q |
|---|---|---|
| First | 23.05.2001, 11:23 | 500 cm³/min |
| Last | 28.05.2001, 9:55 | 370 cm³/min |
18 measurements over the working days of 23.05-28.05.2001 at a fixed working-fluid temperature of 60 °C.
Conclusion of the institute
Current equivalent
Revitalizant gel for hydraulic systems →
Hydraulic systems of industrial and special equipment, pumps, motors and valves; gearboxes with oil filtration.
How such units are treated:
About this result:
Limits of this report: The results relate to the axial-piston hydraulic motor 410.56 with a displacement of 56 cm³ on the test bench of NII Gidroprivod JSC; with other machines and operating modes the figures may differ. The trials were carried out by a joint engineering team of the institute and XADO LLC.