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CAUTION
Mechanical seal primary and stationary rings are made
of brittle material. Material can be cracked or chipped.
Extra care must be taken when handling these rings.
COMPONENT INSPECTION
After the pump has been disassembled, check the following before reassembly:
Impeller Wear
1.
Check the wear hubs on the impeller for excessive
wear, or clearance with the wear rings. If the clear-
ance exceeds 0.020/0.025in., or if the impeller hubs
are badly scored or grooved, replace the impeller and
wear ring.
2.
Check all O-rings for cuts,nicks, or other damage.
Mechanical Seal
1.
When a pump is disassembled, it is advisable to in-
stall a new mechanical seal during reassembly, espe-
cially if the pump had been in service for a long period
of time.
REASSEMBLY
2. Check the shaft surface in the area under the me-
chanical seal bellows to be sure it is free of severe
scratches or other damage. Also check the impeller
hub in the area under the mechanical seal to be sure
it is free from scratches or other damage.
Oil Seals
Check the impeller shaft and drive shaft for signs of severe wear
from the oil seal.
Ball Bearing, Gears and Needle Bearings
Check for severe wear and replace as necessary.
General Overhaul Information
Reassembling the pump is basically the reverse of disas-
sembly. The following guidelines will help in reassembly.
a.
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.
b.
Lubricate all O-rings when installing.
c.
When installing mechanical seal stationary ring, be
careful not to scratch the sealing surface that contacts
the polished primary ring.
d.
If replacing a needle bearing, be sure the inner race
matches the bearing (the two pieces should be flush
when assembled).
Gear Case and Impeller Shaft
1.
Reassemble new drive plate to the flywheel (if neces-
sary) and fasten engine adapter to the engine.
E501-C Oil Seal and Stationary Ring Installation
2.
Position the gear case on the engine adapter and re-
place the four socket head cap screws and washers.
Inspect and replace washers as necessary.
3.
Insert the key, gear (with press) and self locking nut
on the drive shaft.
4.
Place the needle bearing inner race on the end of the
drive shaft (tapered end facing out) if it was removed.
5.
Slide the splined end of the drive shaft assembly (with
Texacor 1912 Coupling Grease applied) into the drive
plate. Be sure the pilot diameter on the shaft goes into
the pilot bore in the flywheel.
Stationary Ring
Oil Seal
E511-C Oil Seal and Stationary Ring Installation
Stationary Ring
Oil Seal
6.
Install the mechanical seal stationary ring, oil seal and
wear ring in the gear case cover. Install stationary ring
with chamfered edge facing gear case (E501-C
Models) or O-ring facing gear case cover (E511-C
Models), being careful not to scratch the sealing sur-
face.
•
Clean stationary ring sealing surface with a soft
cloth and denatured alcohol
NOTE: See Mechanical Seal Lubrication Details on
Pages 14 and 15 for proper mechanical seal lubrica-
tion.
Summary of Contents for E500 Series
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