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TM 5-4210-220-34
2-13.
FIRE PUMP - Continued
2-13.7
Water Ring Primer - Continued
(16) Carefully tap impeller end of primer shaft (19) until the primer shaft and bearings are clear of primer bearing
housing (37). Make sure to use a soft faced hammer.
(17) Inspect ball bearings (14 and 17) as detailed in para. 2-7.
To prevent personal injury or premature bearing failure when removing or installing bearing races, always
exert force on the tight ring of the bearing.
(18) Press bearings (14, 17) from primer shaft (19) if evidence of damage or wear is noticed.
(19) Push the seal (25) and back-up washer (24) towards the impeller cavity and remove from the bearing housing
(37).
(20) Remove all gasket material or corrosion from all mating surfaces.
(21) Install back-up washer (24), and primer shaft seal (25) into primer bearing housing (37) from the impeller
cavity side. Ensure the lip on the back-up washer and the open end of seal face are mounted toward the
impeller.
To prevent personal injury or premature bearing failure when removing or installing bearing races, always
exert force on the tight ring of the bearing.
2-106
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