11
Instruction Manual
3.1.2 Start- Up of Pump Containing No Oil
in Casing and Displacement Chamber
The following instructions assume that both the
pump casing and liquid end (displacement chamber)
contain no oil. This condition typically exists when
the pump is subjected to annual maintenance
during which oil may be drained from the pump
casing and oil may escape from the displacement
chamber during diaphragm replacement.
New pumps received from the factory will have
an empty pump casing and a filled displacement
chamber (liquid end). Please refer to the previous
section for start- up of new pumps. After pump
casing is filled to correct oil level (between top two
dashes on oil cap dipstick), perform the following
operations before placing the pump into service.
Numbers refer to item numbers shown in assembly
drawings
(Figures 7-9)
located in the back of this
manual.
1. Remove hydraulic 3- function valve
(refer to
Figure 8)
:
a. Remove relief valve cap piece (850).
b. Make sure relief valve locknut (900) is tight
to maintain previous relief valve setting upon
start- up.
c. Remove purge button and relief valve
adjustment assembly by removing large
adjustment nut (910).
d. Using needle-nose pliers, remove spring
(950).
e. Using same pliers, remove relief valve poppet
by gently gripping the top of the valve body
(960).
2. Make sure pump capacity adjustment is set to
100%.
3. Fill the opening in the displacement chamber
(600) through the port uncovered by removal
of the 3- function valve in step 1 with the same
oil used to fill the pump casing. Fill the chamber
slowly, allowing air bubbles to escape, until
the oil level reaches the level of the drain tube
(640).
4. Reinstall 3- function valve:
a. Gently gripping the top of the relief valve
poppet (960) with needle-nose pliers, drop
the poppet assembly down into the empty
relief valve port.
b. Drop spring (950) back into relief valve port.
c. Make sure washer (935) is in place above
the O-ring (940) on purge stem (930) and
reinstall purge and relief valve adjustment
assembly by screwing large adjustment nut
(910) back into place. Make sure adjustment
nut (910) is tight.
d. Reinstall relief valve cap piece (850).
5. The pump is now properly filled with oil and ready
for service. If the relief valve locking nut (900)
remained tight during the above procedure, the
relief valve setting should remain unchanged.
If not, refer to next section for instructions on
how to set relief valve.
BEFORE SWITCHING ON POWER
TO THE PUMP, TURN THE CAPACITY
ADJUSTMENT KNOB TO ZERO. CHECK THAT ALL SHUT- OFF VALVES
IN THE SUCTION AND DISCHARGE LINES ARE OPEN BEFORE
INCREASING THE CAPACITY ADJUSTMENT FROM ZERO.
6. Make sure that all air has been bled from the
suction piping and pump head. This can be
accomplished by opening all suction line valves
as well as the system drain (Prime/Air Purge)
valve shown in
Figure 4
and allowing fluid to flow
into drain until all air has been purged. If drain
valve not present, with the pump capacity set
to 100%, operate the pump under no discharge
pressure until the entire pumping system has
been filled.
SECTION 3 - OPERATION
