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AEC/Appllcatlon Engineering
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5. Carefully remove the rotor and shaft to avoid damaging the bracket bushing.
6. Remove the rotary member of the seal from the shaft and the stationary seal seat from the
bracket.
7. Loosen the setscrews. Using a spanner wrench, remove both end caps and lip seals.
Remove the ball bearing and spacer collars.
8. Examine the seal chamber lip seal and remove if you note wear or damage. You must
remove the lip seal if you must replace the bracket bushing.
9. Clean all parts thoroughly and examine for wear or damage. Check lip seals, the ball
bearing, the bushing, and the idler pin; replace if necessary. Check all other parts for nicks,
burrs, and excessive wear; replace if necessary.
Wash bearings in clean solvent. Blow out bearings with compressed air. Do not allow
bearings to spin; tum them slowly by hand. If you spin the bearings, you will damage the
race and balls. Make sure bearings are clean, then lubricate with a non-detergent SAE 30-
weight oil and check for roughness. You can determine roughness by turning the outer race
by hand.
Make sure that the shaft is free from nicks, burrs, and foreign particles that might damage
the bracket bushing. Scratches on the shaft in the seal area provide leakage paths under the
mechanical seal.
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I 0. Check the casing for wear or damage while it is still mounted on the bracket.
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Assembly
Standard Mechanical Seal, Synthetic Rubber Bellows Type
The seal used in this pump is simple to install. If you take care during installation, good
performance will result.
The principle of the mechanical seal is to make contact between the rotary and stationary
members. These parts are lapped to a high finish, and their sealing effectiveness depends on
complete contact. When requesting special seal information, make sure that you give the pump
model number and serial number.
I. Install the bracket bushing. If the bracket
bushing has a lubrication groove, install
the bushing with the groove at the six
o'clock position in the bracket.
2. Install the lip seal in the bracket. Refer
to the following figure.
BAA Cl< ET
BUSHING
TOH True Temp"" Serles Hot 011 Temperature Control Units
LIP SEAL FOR SEAL CHAMBER
SHAFT
BRACKET
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