REASSEMBLY AND TESTING
Page 13 of 13
Reassembling the pump is basically the reverse of disassemb‐
ly. The following guidelines will help in reassembly.
1.
Check the engine crankshaft for any corrosion deposits
that will interfere with seating and sealing of the shaft
sleeve.
2.
Lubricate all O-rings when installing.
3.
The shaft sleeve should seat down tight against the shoul‐
der of the engine crankshaft. It may ”pop” back slightly on
initial installation, but will seat down tight when the impel‐
ler or drive gear is tightened onto the shaft.
4.
When installing mechanical seal seat ring, be careful not
to scratch the sealing surface that contacts the mechani‐
cal seal primary ring.
5.
When installing new wear rings, press them into the bores
carefully so they seat down square at the bottom of the
bore.
Direct Mounted Pump
1.
Lubricate the crank shaft with light oil. Carefully install O- ‐
ring followed by the shaft sleeve. Be sure there are no burrs
on the end of the sleeve.
2.
Install the mechanical seal stationary ring in the pump
adapter, being careful to not scratch the sealing surface.
Clean sealing surface with soft cloth and denatured alco‐
hol.
3.
Install new wear ring if required in pump adapter and vo‐
lute body.
4.
Mount pump adapter to engine. Replace the copper seal‐
ing washers under the socket head cap screws that se‐
cure the pump adapter to the engine, if they show signs
of being badly bowed, cracked or corroded.
5.
Clean crank shaft. Lubricate shaft and inside diameter of
mechanical seal bellows assembly with water based lu‐
bricant. Be sure sealing surface of primary ring is clean.
Wipe with soft cloth and denatured alcohol before installa‐
tion.
6.
Install bellows assembly onto crank shaft with sealing sur‐
face facing the stationary ring. Push bellows assembly
until primary ring contacts stationary ring.
7.
Install the impeller key and impeller. Make sure it is seat‐
ing tight against the shaft sleeve by checking for any gap
where the sleeve seats against the engine crankshaft
shoulder. These surfaces should be tight together with no
gap.
8.
Press new wear ring (if required) into the volute. Coat out‐
side diameter with never seize product.
9.
Place the volute over the lubricated O- ring of the adapter and
replace the 4 bolts, nuts and lock washers.
10. Complete reassembly of the pump and any fittings pre‐
viously removed.
Geared Pump
1.
Install O- ring and shaft sleeve on engine crank shaft oil
seals into gear case. Lubricate the crank shaft with light oil.
Carefully install O- ring followed by the shaft sleeve. Be sure
there are no burrs on the end of the sleeve.
2.
Before installing an oil seal in a housing, apply a thin
coat of sealant to housing oil seal seat. (Waterous
recommends Loctite Ultra Blue RTV Silicon Sealant to
Permatex Super 300).
Be sure that the seal, shaft and
gear case are clean. Always install a seal with the seal lip
facing in. Apply force to the outer edge of the seal and
press in evenly.
3.
Position the gear case over the shaft sleeve on the engine
and replace the four socket head cap screws and washers.
Inspect and replace washers as necessary.
4.
Insert the key, gear, hex head and washers on the engine
crankshaft. Tighten screw securely.
5.
Install the mechanical seal stationary ring and oil seal in
the gear case cover adapter, being careful not to scratch
the sealing surfaces. Clean sealing surface with soft cloth
and denatured alcohol.
6.
Install new wear ring if required in gear case cover.
7.
Insert the impeller shaft assembly in the gear case cover.
8.
Using a new gasket, place the gear case cover on the
gear case and replace the ten hex head screws and lock
washers.
9.
Clean impeller hub. Lubricate hub and inside diameter of
mechanical seal bellows assembly with water based lu‐
bricant. Install bellows onto impeller hub with primary ring
facing the stationary ring. Push bellows assembly on until
it contacts shoulder on impeller hub. Clean sealing sur‐
face of primary ring with a soft cloth and denatured alco‐
hol.
10. Install the key and then the impeller on the shaft.
11. Install the impeller washer and self locking nut. Coat shaft
threads and nut with Locktite 242 or equivalent. Tighten
nut.
12. Press new wear ring (if required) into the volute.
13. Place the volute over the lubricated O- ring of the adapter and
replace the 4 bolts, nuts and lock washers.
14. Complete reassembly of the pump and any fittings pre‐
viously removed.
Testing
1.
Before testing the pump, rotate the engine crankshaft with
the engine starter or rope. The spark plug wire should be
disconnected. Be sure there are no abnormal rubbing
noises.
2.
The mechanical seal may leak when the pump is first run
after it has been repaired. This leakage should stop after
the seal faces run-in.
3.
With the pump running, check for unusual noises or leaks
at volute joints, adapter/gear case engine screws, or shaft
sleeve. These should be corrected before the pump is re‐
turned to service.
Summary of Contents for PB13 Series
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