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If additional valves are needed, to plumb the system to a max-
imum of five oil reservoirs, they can be added by removing the
pipe plug(s) in either end of the manifold and attaching additional
valves at these locations. If it is desirable to orient the additional
valves in the same orientation as the three factory supplied valves,
to ensure maximum performance, it is recommended that a
Close Nipple and standard 90° Elbow be fitted to the manifold
rather than a Street Elbow. The I.D. of a standard Elbow and Close
Nipple is larger and less restrictive than a 90° Street Elbow. Apply
a couple wraps of sealing tape to each pipe joint when installing
additional valves.
When the system is plumbed to all oil reservoirs, each valve can
be identified with its respective connection point utilizing the
assorted labels provided. Select the label(s) that best identifies the
device to which each valve is plumbed then peal it off the sheet of
labels and apply it to the top of the system cover over the valve.
Model Number
Volts
17820-0012
12
17820-0024
24
* The length of run is the total length of both positive and negative conductors measured from the positive power source to the pump and back to negative.
SERVICE
The Jabsco Oil Change System should provide many years of
reliable service without the need for regular or scheduled main-
tenance. However, if sludge should become lodged anywhere
in the system, it can cause excessive vacuum or pressure on the
pump that may damage the flexible impeller. If this occurs pump
performance will be reduced and it will become necessary to
change the pump's impeller.
Before performing any service work, ensure all the system valves
are closed and the power to the pump is turned off and labeled
"Do Not Turn On" to guard against it being accidentally turned
back on while service work is being performed.
IMPELLER REPLACEMENT
To change the impeller, the system's cover assembly must be re-
moved. To do this, remove the cover to base attachment fasteners
(one on each of three sides of the fixed cover and two under the
hinged cover over the manifold) and lift the cover assembly from
the base. Remove the pump end cover screws, end cover and gas-
ket. Grasp the impeller's hub with a pair of pliers and pull the old
impeller from the impeller bore. Ensure the old gasket material is
cleaned from the pump body surface and the end cover.
With a rotary motion (to flex the blades of the new impeller under
the cam silhouette in the pump body) push the new impeller into
the body until the flat of the impeller insert aligns with the flat of
the shaft. When the two flats align, push the impeller firmly into
the impeller bore until it bottoms in the bore. Align a new gasket
with the profile of the pump body and position the end cover
against it and the body. Secure both with the end cover screws.
Position the system cover over the pump and manifold and secure
it to the base at its five attachment points.
ELECTRICAL SPECIFICATIONS AND MINIMUM WIRE SIZE
Fuse /
Amp Draw
Breaker
10
15
5
8
WIRING
Connect the unit to an overload protected electrical distribution
panel (circuit breaker or fuse panel) with marine grade copper
stranded wire, sized to match the recommendation in the
Electrical Specifications chart. The electrical circuit breaker (or fuse)
must also be sized to match the Electrical Specifications recom-
mendation. The positive and negative wire connections should
be secured in place on the electrical terminal block located near
the end of the valve manifold. The positive (Pos.) and negative
(Neg.) terminals of the terminal block are clearly identified. Once
the wiring is completed, the electrical wires should be secured to
a solid surface every 18" (46cm) along the length of their run to
prevent movement and abrasion.
Wire size AWG (mm²) per foot (meter) of length*
0-10 (0-3)
10-20 (3-6)
#16 (1.5mm²)
#14 (2.5mm²)
#16 (1.5mm²)
#16 (1.5mm²)
SEAL REPLACEMENT
Under normal circumstances, the shaft seal should function
properly for several hundred hours of operation. If the seal should
ever develop a leak and need to be replaced, begin the procedure
by following the above instructions for changing an impeller.
Once the impeller has been removed, remove the two screws
that secure the pump head to the motor. Detach the Oil Change
System from the surface it is mounted to, so the base can be raised
high enough to access the nuts on the underside of it that secure
the motor to the base and remove the motor attachment fasteners.
When the motor is detached from the base, slide the motor
straight back and away from the pump housing. With the pump
housing still attached to the molded manifold nipple, support the
back side of the pump housing with one hand (keeping it clear
of the immediate seal area) and insert a dowel into the impeller
end of the pump housing and against the lip side of the seal.
With a firm push, the seal should be able to be pushed out of
the seal bore toward the motor side of the pump housing. If the
seal cannot be easily pushed out of the pump housing, it may be
necessary to unscrew the pump housing from the molded nipple
of the manifold and remove it to a work bench surface where it can
be better supported as the seal is pressed from it. When the seal is
removed, ensure the seal bore is clean of all debris. From the back
side of the pump housing, place the new seal in the seal bore,
ensuring the lip of the seal is pointing toward the impeller bore.
If the pump housing is attached to the manifold's molded nipple,
support the pump housing with one hand, while pressing the seal
into the seal bore until it is firmly seated in the bottom of it. If the
pump housing was removed from the manifold, press the seal into
the seal bore, wrap the manifold's nipple with some sealing tape
and reattach the pump housing to the manifold. Guide the motor
shaft through the lip seal and slide it forward until the motor end
bell is properly seated into the counter-bore on the back side
of the pump housing. Ensure the motor remains firmly seated
against the pump housing while securing it to the Oil Change
System base. With this complete, the base can be re-secured to
its mounting.
3
20-30 (6-9)
30-50 (9-15)
#12 (4mm²)
#10 (6mm²)
#16 (1.5mm²)
#16 (1.5mm²)
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