Liberty Mechanical Seals

Liberty Pumps Unitized Shaft Seals

Direct-fit unitized shaft seals for Liberty Pumps, built to OEM-equivalent standards or higher. Unitized construction means the seal head and the mating ring arrive as one pre-assembled unit — there is no separate seat to press into the housing. Select your shaft size above.

Which one do I need?

• 1/2″ — PS-4064. Seal head OD 1.125″, operating height .344″, mating ring OD .950″. Replaces Liberty 50980A0

• 5/8″ — PS-4065. Seal head OD 1.440″, operating height .760″, mating ring OD 1.110″. Replaces Liberty 5120000, the seal supplied in Liberty kit K001717

• 3/4″ — PS-4066. Seal head OD 1.575″, operating height .437″, mating ring OD 1.334″. Replaces Liberty 5633000

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Fits

5/8″ — PS-4065 / Liberty 5120000: Series FL50, FL60, FL70, FL100, LE70, LE100, LEH100. Models FL61A-B10, FL61A-B61, FL61A-2-B10, FL61A-2-B61, FL61M-B10, FL61M-B61, FL61M-2-B10, FL61M-2-B61, FL62A-B10, FL62A-B61, FL62A-B78

3/4″ — PS-4066 / Liberty 5633000: Series LSG200, LSGX200, XLSGX200, XFL50, XFL70, XFL100, XFL150, XLE50, XLE100, XLE150, FL50, FL200, LE100, LEH100, LEH150, LEH200, PRG. Models LSG202A-B15, LSG202A-B27, LSG202A-B28, LSG202A-B29, LSG202A-B48, LSG202A-B52, LSG202ALC-B52

1/2″ — PS-4064 / Liberty 50980A0 

Applications

Liberty pumps handle effluent, sewage, grinder and sump duty in residential and light commercial systems — basement and crawlspace dewatering, septic effluent transfer, grinder installations and packaged lift stations. The shaft seal is what ends the pump’s life when it goes: once it lets water past, the motor follows.

Need Help Matching?

Confirm your pump model before ordering. Not sure? Send a photo of the pump label and the old seal to info@sealhouseusa.com, or call or text 561-414-1046 — our seal specialists will match it. No purchase required.