THE PRODUCTS DESCRIBED HEREIN ARE SUBJECT
TO THE JABSCO ONE YEAR LIMITED WARRANTY, WHICH
IS AVAILABLE FOR YOUR INSPECTION UPON REQUEST.
SERVICE AND MAINTENANCE
Use only genuine Jabsco replacement parts. Insure power is
removed from pump before service. Drain supply tank and/
or pump system dry before disconnecting liquid fittings.
Periodically clean PUMPGUARD strainers. Keep spare part
kits on hand. Adhere to a preventive maintenance schedule
and replace ‘ware’ parts before the end of their service life.
DISSASSEMBLY
Refer to exploded view.
PRESSURE SENSOR OR PRESSURE SWITCH Remove
cover in item 1. On VSD models, remove clip and unplug pres-
sure sensor. On demand models, disconnect wire leads from
terminals. Remove two mounting screws to release sensor/
switch housing and diaphragm in figure 1.
UPPER HOUSING Remove four pumphead screws to release
upper housing, item 1. Inspect backflow valve in sensor port
for debris. Clean if necessary. Install new sealing ferrules in
upper housing before re-assembly.
CHECK VALVE ASSEMBLY Remove o-ring and check valve
assembly item 2 from pumphead. Valves should be clean and
resilient. Replace if necessary. Always replace o-ring seal.
LOWER HOUSING ASSEMBLY Remove set screw item 4 in
cam bearing assembly from motor shaft using an 1/8” Allen
wrench. To access set screw, remove rubber plug from access
hole in lower housing and rotate the lower housing until the
access hole and set screw are in alignment. Always replace
complete lower housing assembly including diaphragm, pis-
tons, and cam bearing assembly.
RE-ASSEMBLY Re-assemble in reverse order. Rotate each
screw counter clockwise and then clockwise during assembly
to insure that self-tapping screws engage into original threads.
Note: cutting new threads will diminish the strength of the
thread engagement. Insure the set screw in item 3 is aligned
with indentation on motor shaft. Tighten set screw to 35 in-lbs
of torque. Tighten four piston screws to 18 in-lbs of torque.
Tighten four pumphead screws to 30 in-lbs of torque. Sensor/
switch screws should be hand tight. Do not over tighten.
TROUBLESHOOTING CHART
PROBLEM/CAUSE SOLUTION
FAILURE TO PRIME OR PUMP
• Debris in check valve assembly
Clean check valve assembly
• Air leak in suction line
Tighten all fittings and clamps
• Restricted suction line
Clean strainer or remove kink in suction tube
• Supply tank is empty
Fill supply tank
• Ruptured diaphragm
Replace lower housing assembly
MOTOR FAILS TO RUN
• Pump circuit has no power
Check main switch, wire, fuse or breaker
• Loose or corroded wire connection
Fix or replace wire connections
• Blown fuse or open circuit breaker
Determine cause, reset breaker or replace fuse
• Open thermal protector in motor
Turn power switch off, allow motor to cool
• Defective motor, drive, or sensor
Replace defective component
PUMP FAILS TO TURN OFF
• Supply tank is empty
Fill supply tank
• Debris in check valve assembly
Clean or replace check valve assembly
• No battery in circuit
Install battery, replace VSD motor
• Leaking discharge line
Tighten or replace leaking fitting or pipe
• Leaking diaphragm or pumphead
Replace lower housing assembly
LOW FLOW OR PRESSURE
• Blocked inlet strainer
Clean strainer
• Blocked water filter
Replace filter element
• Undersized plumbing or very long runs
Increase plumbing to 3/4” inside diameter
• Defective motor, drive, or sensor
Replace defective component
Jabsco is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem, Inc. 43000-0869 Rev C 6/12
www.xylemflowcontrol.com
Jabsco, 1 Kondelin Road, Cape Ann Industrial Park, Gloucester, MA 01930
Tel: +1 978 281 0440 Fax: +1 978 283 2619
Jabsco, Bingley Road, Hoddesdon, Hertfordshire, EN11 0BU
Tel: +44 (0) 1992 450 145 Fax: +44 (0) 1992 467 132
NHK Jabsco Co Ltd, 3-21-10, Shin - Yokohama Kohoku-ku, Yokohama 222
Tel: +81 (0) 45 475 8906 Fax: +81 (0) 45 475 8908
Jabsco GmbH, Oststraße 28, 22844 Norderstedt
Tel: +49 (0) 40 53 53 73 0 Fax: +49 (0) 49 53 53 73 11
Jabsco Italia, s.r.l., Via Tommaseo, 6, 20059 Vimercate, Milano
Tel: +39 039 685 2323 Fax: +39 039 666 307
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