1.
Install gages on system pressure and on compensator vent port “V”.
2.
Turn compensator adjustment screw out to remove spring load, then 1/2 turn in.
3.
Turn differential adjustment screw out to remove spring load, then 1/2 turn in.
4.
Back out maximum volume stop to full volume.
5.
For setting and testing compensator override function, disable torque limiter in this
manner: Back out primary adjusting screw (15) figure 8, to remove all load. Turn in outer
adjusting screw (8) to go solid. Caution! do not apply over 10 in-lb, 1,2 Nm torque to avoid
damage to internal parts!
6.
Start prime mover with system relief set at 500 psi, 35 bar.
7.
Stroke pump to full displacement. Apply a load to the pump.
8.
Increase system relief valve until compensator de-strokes pump to zero displace-
ment. Set compensator to 1500 psi, 103 bar.
9. Adjust compensator differential spool pressure to 200 psi, 13,8 bar. This is accom-
plished by adjusting the differential screw until the difference in pressure readings
between the system pressure and compensator vent gages installed in the compensator
cap is 200 psi, 13,8 bar. (It may be necessary to change differential to gain stability. Use
caution when exceeding 250 psi, 17 bar to avoid spring going solid, preventing compen-
sator action.) When correct, lock in place and install cap on differential adjustment.
10. Set the compensator to 1500 psi, 3000 psi, and 6000 psi, (207 bar, 414 bar, and 500
bar). At each condition, increase the system pressure until the pump fully de-strokes. At
no time should the system pressure vary more than 150 psi, 10,3 bar from the compen-
sator setting. The control should be steady and stable at all conditions.
11. Reduce pressure to 150 psi, 10,3 bar below the compensator setting. Pump should
return to full stroke. Repeat two or more times. Compensator setting should be repeat-
able.
12. Set compensator adjustment to at least 500 psi, 34,5 bar above the required setting,
or 7000 psi, 483 bar.
Set the torque limiter by using the formula:
HP =P• Q/(Eff. • 1714)
where P = pressure in psi
Q = flow in gpm
kW = P• Q/(Eff. • 600)
where P = pressure in Bar
Q = flow in l/m
calculate these two values:
a.
System pressure at full pump flow.
b.
Pump flow at full system pressure.
13. Set system relief valve to pressure (a) calculated above. Back out primary adjusting
screw to remove all load. Set outer adjusting screw (8) so that pump just commences to
de-stroke.
14. Set the system relief valve to the required maximum system pressure. Set primary
adjusting screw (15) to obtain the calculated flow (b) at full system pressure.
15. Set compensator adjustment to the required setting, or 6000 psi, 414 bar if not oth-
erwise noted.
Note: Electric motor current may be used instead of calculated flows to set power. In step
13, set the outer adjusting screw (8) to achieve the rated motor current. In step 14, set
the adjustment (15) to achieve the rated motor current.
TORQUE LIMITER OVERRIDE
TORQUE LIMITER OVERRIDE
TEST AND ADJUSTMENT
19
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Summary of Contents for P05
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