SPP Pumps Auto Prime Hydraulic Submersibles - S4VHL - Manual (Page 9)

Operators Instructions for
HYDRAFLOW S4VHL Hydraulic Submersible Pump
Manual No/Rev
W79-003E / 4
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 9 of 12
Hose Connections
7. TROUBLESHOOTING
7.1 Preliminary Check List
7.1.1. Check the hydraulic power source to be
sure the oil flow volume and available
pressure is within the range of the
submersible pump. If the power source is
capable of supplying oil in excess of the
required flow, damage will result to the
hydraulic motor and/or pump components
due to over speeding.
7.1.2. Be sure the submersible pump is connected
to a single direction open centre power
source. The submersible pump is not bi-
directional and operating in reverse rotation
can cause seal failure in the hydraulic
motor. The system must be open centre
at all times (return flow from the
submersible pump motor must be allowed
to flow freely to the system oil reservoir).
Do not use hydraulic directional valves that
block the return flow when in the centre
position of the valve. This type of valve is
for hydraulic cylinder operation only and will
cause the submersible pump to stop
abruptly when moved to the centre position
of the valve. This will cause excessive
pressure on the return side of the motor
causing seal failure and possible shaft
damage.
7.1.3. Be sure that the hydraulic hose connections
are clean and properly connected. When
using quick released hose couplers, you
muse be sure that they are completely
connected. A partly connected coupler will
result in seal damage to the hydraulic motor
and pump seal.
7.1.4. Be sure that the pump is submerged
adequately. This is especially important for
vortex impeller pumps since the impeller is
recessed up into the top of the volute.
7.2 Troubleshooting Guide
Hydraulic Pressure High
(above 70 BAR - 1000PSI)
Submersible Pump
Spins
Submersible Pump
NOT Spinning
Hydraulic Motor or
Pump Bearings Seized
Discharge Head Too
High for Pump
Impeller
Jammed
Discharge Hose
Kinked or Plugged
Hydraulic Pressure Low
(below 70 BAR - 1000PSI)
Lack of Water in Pump
Pump Inlet Obstructed
Pump not Properly
Submerged
Air Trapped in Volute
Hydraulic Motor Worn
Excessive Wear
on Impeller
Clear debris from
Inlet or Strainer
Replace Hydraulic Motor
or Pump Bearings
Check Hydraulic Power
Unit with Submersible
Pump disconnected to be
sure it is functioning
properly
Remove Top Cover
and free Impeller
Clear Hose of obstruction
Replace Layflat
Discharge Hose with
Rigid Hose or Pipe
Be sure Pump is
submerged initially to
Oil Filler Plug on
Bearing Housing
Replace Motor
Replace Worn Parts
Check Vent Screw
(on some models) to
be sure it is not plugged
Lower Pump into liquid
while operating
Lay Pump on it’s side with
the discharge in 12 o’clock
position to allow air
to escape
Remove Layflat discharge
hose that may trap air
PUMP NOT PUMPING
INLET
PRESSURE
PORT
INLET
‘FEMALE’
HOSE
CONNECTION
OUTLET
RETURN
PORT
OUTLET
‘MALE’
HOSE
CONNECTION
OVERHUNG
SIDE OF MOTOR
OVERHUNG
SIDE OF
MOTOR