Alfa Laval Toftejorg TZ-79, Instruction Manual, Page: 26 / 48

Maintenance and Repair
(continued)
Hub Subassembly
Disassembly
1. Remove Nozzles (pos. 22). Nozzles are untightened with a wrench on the faces of the nozzles.
2. Remove Screws (pos. 34) from Hub cover (pos. 21).
3. Draw out Hub (pos. 23) together with Hub cover (pos. 21), Ball race (pos. 26), Hub gasket (pos.
24), Ball retainer with balls (pos. 27) and Bevel gear (pos. 20). If Hub cover (pos. 21) clings into
Body, knock carefully with plastic hammer on outer diameter to loosen.
If Ball races (pos. 20.1 and 21.1) in Hub cover and in Bevel gear are extremely worn, they should be
replaced as well as the Ball retainer with balls (pos. 27). How to replace Ball races see page 32.
If blue liners on Stem are extremely worn, they can be replaced. This part requires that a precise
procedure is followed to accomplish installation. It is highly recommended that an authorized Alfa Laval
Tank Equipment Service Center perform the replacement when necessary.
Reassembly
1. Slide on Hub (pos. 23).
2. Mount Bevel gear with race (pos. 20), Ball retainer with balls (pos. 27), Hub gasket (pos. 24) and
Hub cover (pos. 21) and set with Screw (pos. 34).
3. Screw on Nozzles (pos. 22) and tighten with wrench. If desired, secure with liquid threadlocker
Loctite No. 243 or equivalent, see page 12-13.
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