Service Manual 73
Page 23 of 32
B. Pumps with single seal behind the rotor (In-Board location)
See Figure 9.
O-Ring
Seal
Bracket Access Hole
Inner Gland
Lip Seal
Figure 9 – Single Seal in In-Board Location
It is always recommended to replace the rotor if scoring is present on the shaft. If the
old one is being reused, lightly polish the shaft, in order to remove minor defects.
Place the seal head on the rotor shaft. A light lubricant will assist. Proper location of
the seal is with the back portion against the rotor head. If the seal head has
setscrews, tighten them once the seal head is properly located.
!
CAUTION
The highly polished seal faces should not be touched during the assembly process as any minor
scratch could result in leakage once in service.
Insert a new o-ring on the OD of the in-board seal gland. Lightly lubricate the o-ring.
Insert the seal seat into the in-board seal gland bore. If the seal needs an anti-
rotation pin, make sure the pin is aligned with the slot in the seal seat. Install the in-
board seal gland into the bracket making sure the pin is aligned with the hole in the
bracket.
A lip seal is used to keep dirt and contamination away from the bracket bushing
grease. If this seal is damaged, it must be replaced. Always position the lip seal with
the lip facing outward. This will allow old grease to be displaced through the lip seal
during re-greasing.
C. Pumps with single seal behind the bushing (Out-Board location) See Figure 10.
NOTE: This must be done after the bracket is mounted onto the housing and
the rotor/shaft assembly has been installed.
