SPP Pumps Auto Prime Hydraulic Submersibles - S4T - Manual (Page 8)

Manual No/Rev
W79-008E / 4
Operators Instructions for
HYDRAFLOW S4T Hydraulic Submersible Pump
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 8 of 12
13. Check lower ring seal (#14) and replace if
necessary.
14. To remove shaft and bearing assembly,
remove internal snap ring (#13) and press
shaft assembly out of bearing housing.
15. Visually check bearings (#8 and #12). If
replacement is necessary, use adequate
bearing puller or press. Do NOT use heat
to remove bearings.
6.5 Pump Reassembly:
Assembly is performed in the reverse
order of disassembly with care taken to
be sure that:
1. After shaft and bearing assembly are
installed in housing, snap ring (#13) is
secured and shaft rotates freely.
2. Shaft seal (#23) is kept extremely clean at
all times. Be careful not to scratch surface.
Install on shaft with slight amount of
lubricant.
3. Shaft seal stationary seat is installed
smooth side (lapped side) toward rotary
seal face. Lightly lubricate rubber surface
of stationary seat and carefully slide into
cavity on seal plate (#15). Lightly lubricate
inside rubber surface of rotary seal and
carefully slide onto shaft. Be sure these
parts are kept perfectly clean during
assembly or premature seal failure could
result!
4. "O" rings are properly installed in grooves.
5. Motor slides properly into pump shaft.
6. Impeller is threaded on pump shaft and
secured properly by locking screw (#22)
and retaining washer (#21) (40 lbs. ft
torque).
7. Drive assembly rotates freely before
installing into volute. The hydraulic motor
will create some drag. Be sure hose ports
are open on the motor so as not to get
hydraulic binding.
8. Bearing housing is refilled with oil to the
bottom of the 1/4" plug (#14) hole (spill
point with pump standing upright).
9. Before submersing pump, test run on dry
land. Check for proper rotation of impeller
(counter-clockwise looking into volute inlet).
The pump will run backwards and PUMP
WATER although at noticeably lower
volumes.
6.6 Pump Hose Connection:
NOTE – When the pump hose connections have
been disconnected from the hydraulic motor
it is IMPORTANT to ensure that they are
refitted correctly. The inlet port on the
motor is normally fitted with the Female
quick release hose coupling.
7. TROUBLESHOOTING
7.1 Preliminary Check List
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.
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.
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.
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.