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D10-991-2400 5/1/04
D/G-10 Service (Fluid End)
4. Flush Contaminant from
Hydraulic End
(only if a diaphragm has ruptured)
a. Remove the oil drain cap (34) and allow all oil and
contaminate to drain out.
b. Fill the reservoir with kerosene or solvent, manually turn
the pump shaft to circulate the kerosene, and drain.
CAUTION: If you have EPDM diaphragms, or if food
grade oil is in the reservoir, do not use kerosene or
solvents. Instead, flush with the same lubricant that is
in the reservoir. Pumps with EPDM diaphragms have
an “E” as the 7th digit of the Model No.
c. Repeat the flushing procedure (step b).
d. Fill the reservoir with fresh oil, manually turn the pump shaft
to circulate the oil, and drain once again.
e. Refill the reservoir. If the oil appears milky, there is still
contaminate in the reservoir. Repeat the flushing procedure
until the oil appears clean.
5A. Prime the Hydraulic Cells on
Standard Pumps
a. With the pump horizontal, and the fluid-end head removed,
fill the reservoir with the appropriate Hydra-oil for the
application. Have a catch basin for oil that leaks from behind
the diaphragms when priming. Catch the oil and dispose of
it properly; do not reuse it.
b. All air in the oil within the hydraulic cell (behind the
diaphragms) must be forced out by turning the shaft (and
thus pumping the piston). A shaft rotator is included in the
Wanner Tool Kit. Turn the shaft until a bubble-free flow of oil
comes from behind all the diaphragms. Watch the oil level
in the reservoir; if it gets too low during priming, air will be
drawn into the pistons (inside the hydraulic end) and will
cause the pump to run rough.
c. Wipe excess oil from the cylinder casting (24) and
diaphragms (20).
d. Ensure that the oil is 1 inch (25 mm) from the top of the fill port.
e. Replace oil fill cap (27).
5B. Priming the Hydraulic Cells
for Kel-Cell Pumps
NOTE: Providing oil prime to Kel-Cell fitted pumps requires
pressure be applied to the diaphragms. This can be done
manually, with the system head pressure, or with
pressurized air if available. Review all methods below to
determine the procedure most suitable.
Method #1 (system head pressure
less than 2 psi)
a. Install the valve plate (16) but without the outlet valves
installed (or else remove the outlet valves; leave the seats
installed) onto the cylinder housing. Tighten the two socket-
head screws (41).
b. Fill the reservoir with appropriate Hydra-oil to the fill port.
c. With a blunt pointer (eraser end of pencil), reach in through
each outlet valve port and push the follower-diaphragm
backwards. Note the air bubbles coming out at the oil fill
port. Now turn the shaft about 1/2 turn.
d. Repeat depressing diaphragms and rotating shaft (approx.
4-6 times) until no more air bubbles escape and the oil has
dropped about 1 inch (25 mm) from the top of the fill port.
The hydraulic cells are now primed. Replace the oil fill cap.
e. Install outlet valve assemblies in each outlet valve port. See
Parts Manual for correct assembly order. You may have to
tip pump (head upward) in order to keep the valve centered
on the seat and allow the retainer to fit all the way into port
flush.
f.
Install manifold (6) and complete installation.
Alternative Method #1:
With the pump horizontal, and the fluid-end head removed, fill
the reservoir with the appropriate Hydra-oil for the application.
Have a catch basin for oil that leaks from behind the diaphragms
when priming. Catch the oil and dispose of it properly; do not
reuse it.
a. All air in the oil within the hydraulic piston behind the
diaphragms must be forced out by turning the shaft (and
thus pumping the piston). A shaft rotator is included in the
Hydra-Cell Tool Kit. Keep pressure on the diaphragms while
turning the shaft until a bubble-free flow of oil comes from
behind all the diaphragms. Maintain the oil level in the
reservoir. Do not allow oil level to be lower than the reservoir.
b. Quickly attach the loaded valve plate (16) (before the oil
runs out past the diaphragms) with socket head screws (41),
but do not tighten completely. Leave a gap between the valve
plate and the cylinder housing. Turn the shaft 2-3 turns to
finish forcing out air behind the diaphragms. The hydraulic
cells are now primed. Now finish tightening the valve plate
with the two socket head screws and add pump manifold.
c. Wipe excess oil from around the pump head.
d. Check that the oil level is 1 inch (25 mm) from the top of the
fill port.
e. Replace the oil fill cap and complete installation.
