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6

EATON CORPORATION Fluid Power

Test Procedure to Evaluate Fluids in Piston Pumps Technical Data V-PUPI-TS022-E March 2009

The type of fluid being tested
will determine pressure, speed,
and temperature. See Table 1.
Run for 50 to 55 hours at rated
pressure (pressure compensator
cut-off), rated speed, and rated
temperature.

Repeat the pump performance
check and record the results on

the Pump Performance Check
Record (page 11).

After completion of the 50-hour
cut-off test, inspect valve plate
and photograph the running
surface.

Fail criteria is material transfer,
or cavitation and/or erosion

damage. Slight cavitation/
erosion may be observed at the
output metering groove area of
the valve plate (Figure 5).

Re-assemble the pump and
repeat the pump performance
check. Record the results on the
Pump Performance Check
Record (page 11).

Fifty-Hour Pressure
Cutoff Test

Two Hundred-Hour
Cyclic Test

Re-Assembly

Re-assemble the pump per
Vickers Overhaul Manual M-
2210-S while lubricating all parts
with the fluid to be tested.

Test Pump Re-Installation

Install the test pump back into
the test circuit per Figure 1 and
fill the pump case with pre-
filtered test fluid.

Follow NFPA T2.13.1 R3 - 1998
procedure when changing from
one hydraulic fluid to another in
the test stand, or consult the
fluid supplier for any other
specific recommendations.

Test Fluid Filling

Measure the following on the
test fluid as received from the
drum. Record the results on the
Test Fluid Record (page 13).
• Viscosity cSt @ 40°C
• Water content wt % (0.03%

max. – only for non-water
containing hydraulic fluids)

• Cleanliness level ISO Code
• Spectrographic analysis for at

least the following elements
(ppm): P, Zn, Ca, K, Ba, B, Si,
Fe, Cu, Pb, Sn

• Total Acid Number (TAN)

mg/KOH (Report only for
vegetable and synthetic
environmentally acceptable
hydraulic fluids, and poly-

olester fire resistant hydraulic
fluids.)

After transferring the test fluid
from the drum to the reservoir
using a filter cart to assure fluid
cleanliness, report the following:
• Water content wt %
• Cleanliness level ISO Code

(maintain 18/16/14 or cleaner.)

Baseline Performance Check

The type of fluid being tested
will determine pressure, speed,
and temperature. See Table 1.
Repeat the pump performance
check and record the results on
the Pump Performance Check
Record (page 11).

Test Fluid

Sequence of Operations

1 Energize 16 and 15 – puts

pump at full displacement and
some pressure set by 17.
Time: 0.75 sec.

2 De-energize 16 – puts pump

into P.C. cut-off. Relief valve
14 is used to limit peak pres-
sure. Time: 0.5 sec.

3 De-energize 15 – puts pump

at L.S. standby. Time: 0.5
sec.

4 Repeat above sequence.

Cyclic Test Procedure

Continue running the cyclic test
for at least 200 hours. The pump
must run for a minimum of 200
hours (411,400 cycles) to a
maximum of 210 hours (431,970
cycles).

Perform the pump performance
check once per day throughout
the test. Record results on the
Pump Performance Check
Record (pages 11 and 12).

Cycle/Pressure Parameters:
• 0.75 sec full flow at 90%

rated pressure.

• 0.5 sec @ cut-off (rated

pressure).

• 0.5 sec @ load sense stand-

by.

• Load sense pressure decay

rate of 6.9 to 10.3 kbar/sec
(100,000 to 150,000 psi/sec)

Total cycle time of 1.75 seconds
(2057 cycles/hr).

Figure 7 represents a typical
cycle plot.

Control Pressure
Hysteresis Check

Perform a control pressure
hysteresis check (Appendix B)
before running the two hundred-
hour cyclic test, at 100 hours
and after completion of the 200
hours.

Pay special attention to the inlet
condition. Inlet pressure must
be maintained at 1 bar absolute
(0 psig) at full flow.

Record actual hydraulic testing
cycle plot.

If a 5% or greater flow loss is
found at rated conditions during
the test, stop the test and disas-
semble the pump for inspection.

Inspect valve plate and photo-
graph the running surface. Fail
criteria is material transfer, or
cavitation and/or erosion dam-
age. Slight cavitation/erosion
may be observed at the output
metering groove area (Figure 5).

Re-assemble the pump if parts
appear acceptable.

Pump Inspection

After completion of the 200-hour
cyclic test, disassemble test
pump and inspect as follows:
• Valve plate running face –

inspect surface finish visually
and photograph. (Figure 5)

• Cylinder barrel running face –

inspect surface finish visually.
(Figure 5)

• Swashplate running face –

inspect surface finish visually.
(Figure 5)

• Swashplate (yoke) bearing

journals – inspect visually.

• Cradle (saddle) bearings –

inspect visually. (Figure 5)

• Bias and control piston/rod –

inspect visually. (Figure 6)

• Hold-down arms and shoe

face – inspect visually.

• Shaft seal and mating shaft

surface – inspect visually.

• Measure land diameters and

width on both control spools
of the compensator. (Figure 6)

• Measure piston/shoe endplay

and piston diameter and cylin-
der barrel bores at top, middle
and bottom of piston. Record
results on the blank Piston/
Bore Record (page 15).

• Shoe cage – inspect visually.
• Shaft and shaft bearings –

inspect visually.

• Photograph any worn parts.

Содержание Vickers PVH57C-RF-2S-11-C25V-31

Страница 1: ...ump whichever is lower Inlet fluid temperature must be maintained per fluid pump rating throughout the complete test The pump to be used is a PVH57 with a pressure compensator and load sensing control...

Страница 2: ...getable Base 1800 250 3625 65 149 Environmentally Friendly Synthetic Base 2400 250 3625 95 203 Figure 1 Component 1 Vented reservoir approx 102 gallons 2 Heater 3 Strainer optional 4 Thermometer 5 2 g...

Страница 3: ...the compensator at rated pressure adjust speed and temperature per the ratings for the test fluid Perform the pump performance check procedure Sequence of Operations 1 Energize 15 while 16 is de ener...

Страница 4: ...igure 3 Identify the pistons and respective bores in the cylinder barrel per Figure 4 for re assembly into the same location NOTE In millimeters measure cylinder barrel bores and piston OD to three de...

Страница 5: ...ally Figure 5 5 Cradle saddle bearings inspect visually Figure 5 6 Bias and control piston rod inspect visually Figure 6 7 Hold down arms and shoe face inspect visually 8 Shaft and shaft bearings insp...

Страница 6: ...ump at full displacement and some pressure set by 17 Time 0 75 sec 2 De energize 16 puts pump into P C cut off Relief valve 14 is used to limit peak pres sure Time 0 5 sec 3 De energize 15 puts pump a...

Страница 7: ...s for at least the following elements ppm P Zn Ca K Ba B Si Fe Cu Pb Sn Total Acid Number TAN mg KOH Report only for vegetable and synthetic environmentally acceptable hydraulic fluids and poly oleste...

Страница 8: ...ng it the minimum displacement to maintain the de stroked position The load sense signal line is at zero pressure Valve Plate The plate between the cylinder barrel and end cover on which the cylinder...

Страница 9: ...utput Pressure psig Output Power HP 1714 Input Torque in lb X Speed rpm Input Power HP 63025 Output HP Overall Efficiency X 100 Input HP Output Flow lpm X Output Pressure bar Output Power kW 600 Input...

Страница 10: ...block needs to be assembled between the control and the end cover valve block to pick up control piston pressure Use a variable orifice valve to vary the pump s outlet pressure refer to page 3 for pr...

Страница 11: ...ssure ___________________________________ Speed rpm __________________________________ INPUT OUTPUT OUTPUT CASE CASE CASE INLET TORQUE PRESSURE FLOW FLOW TEMP PRESSURE TEMP EFFICIENCY Performance Chec...

Страница 12: ...__________________ Speed rpm __________________________________ INPUT OUTPUT OUTPUT CASE CASE CASE INLET TORQUE PRESSURE FLOW FLOW TEMP PRESSURE TEMP EFFICIENCY Performance Check During 200 Hour Test...

Страница 13: ...for vegetable and syn thetic environmentally accept able hydraulic fluids and poly olester fire resistant hydraulic fluids Test Fluid Record At Test Fluid Filling Viscosity cSt 40 C ________ Water con...

Страница 14: ...Data V PUPI TS022 E March 2009 Piston Bore Record Cylinder Block Bores NO TOP MIDDLE BOTTOM 1 2 3 4 5 6 7 8 9 Piston OD Dimensions NO TOP MIDDLE BOTTOM 1 2 3 4 5 6 7 8 9 MAX MIN PISTON PISTON TO SHOE...

Страница 15: ...UPI TS022 E March 2009 Piston Bore Record Cylinder Block Bores NO TOP MIDDLE BOTTOM 1 2 3 4 5 6 7 8 9 Piston OD Dimensions NO TOP MIDDLE BOTTOM 1 2 3 4 5 6 7 8 9 MAX MIN PISTON PISTON TO SHOE NO TO BO...

Страница 16: ...Prairie MN 55344 USA Tel 952 937 9800 Fax 952 294 7722 www eaton com hydraulics Eaton Fluid Power Group Hydraulics Business Europe Route de la Longeraie 7 1110 Morges Switzerland Tel 41 0 21 811 4600...

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