Gorman-Rupp Pumps HSV6B31-HYD All serial numbers - Manual (Page 12)

HS AND HSV SERIES OM−03984
OPERATION PAGE C − 2
Failure to tighten connections can cause
excessive hydraulic system pressure,
resulting in damage to the hydraulic motor
and/or other components.
6. De-energize the hydraulic system. Connect the
discharge hose and install the pump as de-
scribed in INSTALLATION, Section B. Energize
the hydraulic system again and adjust the en-
gine speed to achieve the desired pump out-
put.
7. If full volume is not required, the engine speed
may be slowed down as necessary to conserve
fuel. Do not increase engine speed once the
factory-set system operating pressure is
achieved.
NOTE
Some pump models are equipped with a vented
screw (see the Parts Identification List in the
MAIN-
TENANCE AND REPAIR MANUAL) which is de-
signed to relieve trapped air in the pump casing.
The pump will not operate if this trapped air is not
removed. If the pump does not produce flow, de-
energize the hydraulic system, remove the pump
from the wet well or sump, and check to ensure that
the hole in the vented screw is not clogged.
OPERATIONAL CHECKS
Hydraulic Oil Level/Temperature
1. Maintain the hydraulic oil level to the top of the
sight glass on the side of the hydraulic reservoir.
2. After initial startup, check the hydraulic oil level
in the reservoir. Filling the hydraulic hoses ini-
tially will cause the level to drop.
3. During operation, check to be sure the hydrau-
lic oil operating temperature never exceeds
170
_F (77_C). If the temperature becomes ex-
cessive, shut down the system and allow the oil
to cool. Check for insufficient oil in the reservoir,
kinked hydraulic hoses, inadequate ventilation
of the reservoir or oil cooler, a clogged return
line filter (on models equipped with a 45 gallon
[170 liter] hydraulic tank, the gauge on the filter
will read in the red or above 40 PSI), or the sub-
mersible pump may be running dry for ex-
tended periods of time.
Low Oil Shutdown
1. The low oil shutdown switch is mounted on the
front of the hydraulic oil reservoir (on units
equipped with emergency shutdown pack-
ages). It will shut down the engine in the event
of loss of hydraulic oil to protect against dam-
age to the system.
Oil Cooler
1. If your hydraulic power unit is equipped with an
engine-mounted air/oil cooler to cool the hy-
draulic oil, be sure the cooling fins are kept
clean so air can circulate freely through it.
System Leaks
1. Check all system components regularly for
leaks. When checking the relief valve, check the
control valve and tubing. Replace the valve,
and repair or replace tubing, fittings, oil cooler
or any other components at the first sign of leak-
age.
STOPPING
1. To stop the pump, de-energize the system (turn
the control valve counter-clockwise).
2. Reduce the engine speed slowly before stop-
ping to prevent possible system damage.