Alfa Laval Toftejorg TZ-79, Instruction Manual, Page: 30 / 48

Maintenance and Repair
(continued)
Gear Subassembly
Disassembly
1. Hold Turbine shaft (pos. 7) against 1st stage Worm wheel (pos. 14) with one hand and loosen
Screws (pos. 17) in Pinion (pos. 11) and Horizontal shaft (pos. 29) with the other hand.
2. Draw out Turbine shaft (pos. 7) after Screw (pos. 17), Spring Washer (pos. 16) and Washer (pos.
18) has been removed. Use faces on Turbine shaft to hold against rotation.
Warning : Do not damage driver faces on Turbine shaft. Use only proper tools providing a firm
grip such as a wrench or a vice.
3.
Draw out Horizontal shaft (pos. 29) and 1st stage Worm wheel (pos. 14) after removal of Screw
(pos. 17), Spring washers (pos. 16) and Washer (pos. 18).
4. Draw out Pinion (pos. 11) and 2nd stage Worm wheel (pos. 13), also freeing Journal (pos. 15) after
removal of Screw (pos. 17), Spring washer (pos. 16) and Washer (pos. 18).
5. Remove Bearing covers (pos. 32) and Slide bearings (pos. 30) after removal of Screw (pos. 17).
How to replace Collar bushes (pos. 12), see page 30.
Reassembly
1. Push Slide bearing (pos. 30) into Gear frame (pos. 31) and fix Bearing covers (pos. 32) with
Screws (pos. 17). Tighten crosswise.
2. Insert 2nd stage Worm wheel (pos. 13), Pinion (pos. 11) and Journal (pos. 15). Mount Washer
(pos. 18), Spring washer (pos. 16) and fix with Screw (pos. 17). Check rotation.
Note : It is important that the Screw holding the Pinion is fastened to a torque moment of 5 Nm,
to secure it from loosening.
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