Xylem JABSCO 31800 Serie Manual De Instrucciones página 5

SERVICE INSTRUCTIONS
Before servicing pump, turn off electrical power and open dis-
charge valve to relieve pressure in pump. Neutralize any chemicals
prior to disassembly.
PUMP DISASSEMBLY
1. Remove power from pump. Push port clips back and disconnect
plumbing from pump.
2. Remove the four (4) pumphead screws.
3. Rotate pumphead until cam/bearing set screw is visible
through drain notch.
4. Loosen cam/bearing set screw and slide pump off motor shaft.
5. Separate upper housing, lower housing, and check valve as-
sembly as required.
PUMP ASSEMBLY
1. Install new outer piston in lower housing with piston tops
pointing away from motor.
2. Install new diaphragm in lower housing with the molded o-ring
seals facing away from motor.
3. Insert each inner piston through the diaphragm into outer
piston.
4. Turn each piston until fully seated.
5. Secure cam/bearing assembly to outer piston using 18 in-Ib (21
kg-cm) torque.
6. Slide lower housing on motor shaft. Align set screw with motor
shaft indentation.
DIMENSIONAL DRAWING
DESSIN DIMENSIONNEL Pouces (Millimètres) / MAßZEICHNUNG Zoll (Millimeter) / DISEGNO DIMENSIONALE Pollici (millimetri)
MAATTEKENING Inches (Millimeters) / DIMENSIONELL RITNING Tum (millimeter) / DIBUJO DIMENSIONAL Pulgadas (Milímetros)
Inches (Millimeters)
31800
5
7. Set screw MUST be positioned over shaft indentation and se-
cured tightly.
8. Check that ferrules are installed in upper housing and O-ring
is properly seated.
9. Install check valve assembly in upper housing and fit upper and
lower housings together.
10. Align pumphead with motor and tighten four (4) screws evenly
using 25 in-Ib (29 kg-cm) of torque.
SWITCH REPLACEMENT
1. Remove power from pump. Relieve system pressure. Discon-
nect inlet and outlet hoses.
2. Remove pressure switch cover and disconnect power leads from
switch.
3. Remove switch and switch diaphragm from pump by removing
two (2) switch mounting screws.
4. Replace switch diaphragm and switch. Reassemble in reverse
order.
5. Do not over tighten switch mounting screws.
CAUTION
Pumps have thermal overload protected motors.
The motor will automatically shut off as tempera-
ture rises due to an overload condition.
If the motor shuts off in this manner, close all noz-
zles, faucets or valves. After a cooling off period, the
pump will automatically re-start.
31801