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Wiring must comply with applicable electrical standards and include a properly sized fuse
or circuit breaker. IMPROPER WIRING CAN CAUSE A FIRE RESULTING IN INJURY OR DEATH.
OPERATIONS
• Check level of water in tank. Be sure valves are open and strainers and aerators are clean.
• Open all faucets, hot and cold.
• Turn on power to pump.
• Close each faucet when it starts to deliver a steady stream of water (close cold water first).
• Observe the pump. Check to be sure pump stops soon after all faucets are closed.
• Pump is now ready for automatic operation. It will start when a faucet is opened and
stop when the faucet is closed.
• Turn off power to pump and open faucet to relieve system pressure prior to city water
or dockside hook-up and when unattended.
MAINTENANCE
WINTER STORAGE Jabsco pumps, with their unique pulsation dampener, will withstand
frozen water without damage provided the system is not under pressure prior to
freezing. To prevent accidental damage, the entire water system should be protected
from freezing during winter storage. This requires complete draining, using the
following directions and/or vehicle manufacturer's instructions:
1. Open all faucets and drains and allow pump to empty water tanks and intake line.
Run the pump dry for 1 to 2 minutes before turning off.
2. With all drains open, blow air through city water entry. Allow time for water heater to
empty.
3. Disconnect discharge and intake hoses from the pump. Start the pump and allow to
run until all water is expelled from unit. (Running dry will not harm the pump).
4. Reconnect the hoses, close the drains and leave faucets open. The water distribution
system is now dry and ready for winter storage.
An alternate method is to use potable water system anti-freeze solution. Follow
directions of anti-freeze manufacturer.
CAUTION
DO NOT USE AUTOMOTIVE TYPE ANTI-FREEZE. IT IS POISONOUS. USE
OF THIS TYPE OF ANTI-FREEZE WILL CAUSE SERIOUS INTERNAL INJURY OR DEATH.
See Figure 3.
VALVES ASSEMBLY REPLACEMENT - See Figure 3.
1. Remove motor and four jack shaft assembly tie down screws. Lift jack shaft assembly
to expose valves.
2. Lift valves from pockets. Clean all foreign materials from valves and seats. Inspect
rubber flappers for cuts.
3. Reinstall valves into same pockets, being sure rubber valve with small hole is UP on
intake and rubber valve without the small hole is DOWN on discharge.
NOTE: Do not use valve with small hole in rubber on discharge side of pump or pump
will operate incorrectly.
4. Replace motor, do not overtighten belt.
DIAPHRAGM & CONNECTING ROD REPLACEMENT - See Figure 3.
1. Remove motor and four jack shaft assembly tie down screws, then lift jack shaft and
attached diaphragm assembly from pump base.
2. Expose diaphragm by removing two diaphragm retainer screws and detaching
retainer.
3. Remove diaphragm screw to separate diaphragm, plates and washer/spacer from
connecting rod. Inspect diaphragm for cuts and ruptures.
4. Remove locking nut to separate connecting rod from jack shaft.
5. When reassembling, be sure to align diaphragm and connecting rod so that rod slips
straight onto jack shaft and diaphragm rests squarely on diaphragm retainer.
6. Replace motor, do not overtighten belt.
PULSATION DAMPENERS REPLACEMENT - See Figure 3.
1. Remove nine screws from bottom plate and three screws from small bottom plate.
Mark bottom of small plate for proper reassembly.
2. Pull out rubber pulsation dampeners from base. Inspect for excessive deformation,
ruptures and cuts.
3. When installing new large pulsation dampener, check that its metal screw sleeve-guide
is positioned between center hole and screw-way in the base. Make sure that flanges
of both pulsation dampeners are well-seated to effect a proper water and air seal.
SWITCH REPLACEMENT – PROCEDURE A - See Figure 3.
Direct replacement of switch with threaded stem directly into pump body.
1. Disconnect power leads from switch and remove switch from pump.
2. Moisten rubber side of washer with water. Thread washer onto switch threads with
metallic side of washer facing switch. Apply a thin film of sealing compound to the
replacement switch threads. Keep compound clear of passage-way hole.
3. Screw replacement switch into pump base/body until snug.
4. Reconnect switch power leads.
MOTOR REPLACEMENT - See Figure 3.
1. Remove two motor nuts to separate motor.
2. Loosen set screw to remove small pulley from motor shaft.
3. When reassembling, adjust belt tension so belt between pulleys can be depressed
1/4" after motor nuts are tightened.
Do not overtighten belt.
CAUTION
POTENTIAL FOR COMPONENT INCOMPATIBILITY - FOR WATER ONLY.
CAUTION
MOTOR BASE COULD GET HOT DURING EXTENDED OPERATION.
PROLONGED CONTACT WITH SKIN MAY CAUSE BURN,
WARNING
FIRE HAZARD
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