LT3-00032-2-A - DDKS Industries, hydraulic components distributor

TEST PROCEDURE
GENERAL REQUIREMENTS
Maximum runout between pump shaft and electric motor shaft .003”, .076 mm total
indicator reading.
Electric motor speed - 1800 rpm.
Inlet temperature - 120 0 -140 0 F, 500-580C.
Inlet condition - main pump
24 series 150 psi min., 10,3 bar min.
30 series 225 psi min., 15,5 bar min.
internal vane pump- 10” Hg to 5 psi, 254 mm Hg to .34 bar (except “S” version)
Case pressure 55-75 psi, 3,81-5,19 bar.
Fluid - 200 SSU at 100 0 F, 46 cSt at 40°C
BASIC PUMP TEST
Mount pump on test stand. Connect system lines and internal (externial with auxiliary
drive) vane pump inlet to pump. Fill pump case with clean oil. Dry all oil from pump to
permit checking for external leaks.
Start electric motor. Jog several times before continuous running.
Rotate pump input control shaft. The servo control should control pump displacement
through its full range. Set pump displacement for full volume, and adjust system pressure
for 1000 psi, 69 bar. Check and record system flow and case drain flow with cam
above and below center. Monitor loop temperature.
Maximum system flow
Maximum case drain flow
24 series 194 gpm, 734 Lpm
30 series 241 gpm, 912 Lpm
24 series 4.5 gpm, 17 Lpm
30 series 5.5 gpm, 21 Lpm
Back out compensator adjusting screw until unit is fully compensated count number
of turns. Observe volume indicator and stroke rotary servo input shaft from full to full
position on each side of center. Indicator should remain on or very near zero position
“0”. If compensator functions normally, return compensator adjusting screw to its
original position and proceed with next step.
Caution: Do not over tighten cap screw.
Cycle pump at 10 second intervals - full volume above center to full volume below
center* - as follows:
10 minutes at 1000 psi, 69 bar
10 minutes at 2500 psi, 172 bar
10 minutes at 5000 psi, 345 bar
*Pumps with screw adjustment controls do not need to be cycled.
Adjust system pressure to 5000 psi, 345 bar and set pump displacement for full
volume. Check and record system flow and case drain flow above and below center.
Minimum system flow
Maximum case drain flow
24 series 160 gpm, 606 Lpm
30 series 220.69 gpm, 385 Lpm
24 series 12 gpm, 45,4 Lpm
30 series 13 gpm, 49 Lpm
Set pump to compensate at 5000 psi, 345 bar. Servo pressure should be at least 600
psi, 34,5 bar. Check and record internal vane pump flow.
Model: P**P-xxxx-xxx-x-xx-xx-_
0 1 2 3 4 5 6
Vane pump disp. in./rev. 2.81 1.61 1.05 3.56 4.84 5.42 6.10
cc/rev. 46,1 26,4 17,2 58,3 79,3 88,8 100,0
Min. flow at 1800 rpm gpm 21.3 11.8 7.4 27.0 37.0 41.5 46.8
Lpm 80,6 44,7 28,0 102,2 140 157,1 177,3
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