SPX FLOW Infinity Series Operating Instructions Manual page 16

Troubleshooting Guide Continued
Problem
Pump is not delivering fluid
or delivers only enough
fluid to advance wrench(s)
partially or erratically.
Pump delivers excess fluid
pressure.
© SPX FLOW, Inc.
Cause
1. Fluid level too low.
2. Loose-fitting coupler to wrench.
3. Air in system.
4. Air leak in suction line.
5. Debris in pump or filter plugged.
6. Hydraulic fluid is bypassing
through the double-acting wrench.
7. Cold hydraulic fluid or hydraulic
fluid too heavy (Hydraulic fluid is of
a higher viscosity than necessary).
8. Relief valve or low pressure
unloading valve out of adjustment.
9. Reservoir capacity is too small for
the size of the wrench(s) used.
10. Defective directional valve.
11. Motor rotating in wrong direction.
12. Vacuum in reservoir.
1. Faulty pressure gauge.
2. Relief valve not properly set.
15
Solution
1. Fill reservoir to 44.5–50.8 mm
(1.75–2.00 in.) from top of filler hole
with wrench retracted.
2. Check quick-disconnect couplings to
wrench. Inspect couplers to ensure
that they are completely coupled.
Occasionally couplers have to be
replaced because the ball check
does not stay open due to wear.
3. Bleed the system.
4. Check and tighten suction line.
5. Pump filter should be cleaned and,
if necessary, pump cartridges
should be dismantled and all parts
inspected and cleaned.
6. By removing the wrench and capping
the hoses, the pump and valve can
be checked. Observe if pump holds
pressure.
7. Change to a lighter hydraulic fluid.
8. Adjust as needed.
9. Use smaller wrench(s) or larger
reservoir.
10. Inspect all parts carefully and
replace if necessary.
11. Air motor: Air line connected into
wrong port.
12. Check for plugged vent in filler plug.
1. Calibrate or replace gauge.
2. Adjust the relief valve.
Form No. 1000577
Rev. 2 Jun. 02, 2022