Alfa Laval Toftejorg TJ20G, Instruction Manual

Page: 15 / 34

Maintenance and Repair
(continued)
Turbine and Carrier Assembly
Disassembly
1. Remove M5 Screws (Pos. 8). Loosen and unscrew with a socket wrench (tool No. TE462A).
2. Lift off Cone (Pos. 1).
3. Withdraw Turbine shaft (Pos. 2) with Impeller. If necessary, turn Turbine shaft left and right.
4. Remove Circlip (Pos. 4) and pull off Impeller (Pos. 5).
5. Withdraw Carrier assembly (Pos. 15) while turning/rocking carrier left and right.
6. Remove Cotter pins (Pos. 15.7), pull out Shafts (Pos. 15.2) and remove Planet wheels (Pos. 15.4
and 15.5). If necessary, push out Carrier bearing (Pos. 15.3)
7. If necessary, push out Bearing for Turbine shaft top (Pos. 24) from Cone (Pos.1).
Reassembly
Before reassembly, make sure that all parts are clean without deposits or build-up of foreign matter.
1.
Insert Bearing for Turbine shaft top (Pos. 24) in top of Cone (Pos. 1).
2. Insert Carrier bearing (Pos. 15.3) and push with thumb. Insert Planet wheels (Pos. 15.4 and 15.5)
and Shafts (Pos. 15.2) and secure with Cotter pins (Pos. 15.7). Check free rotation of Planet
wheels.
Note: The two Planet wheels are different: on Planet wheel 1, teeth of upper an lower gearing
are aligned, while they are displaced ½ tooth on Planet wheel 2.
3.
Insert Carrier Assembly (Pos. 15), into Body: Insert through Stem (Pos. 16, page 17). Hold Body in
one hand and use the other to turn Hub Cover (Pos. 19) left and right with small rocking
movements until carrier falls through Internal gear (Pos. 13, page 17). Check that carrier is fully
home on Bearing for Turbine shaft top (Pos. 24) in Body: Rotate Carrier Assembly by hand a few
rotations to check correct position and function.
4. Mount Impeller (Pos. 5) on Turbine shaft (Pos. 2) and secure with Circlip (Pos. 4).
5. Insert Turbine shaft with Impeller through Carrier Assembly. Rotate Impeller to ensure correct
insertion into Bearing for Turbine shaft (Pos. 3) in Body. Check unrestricted rotation.
6. Mount Cone (Pos. 1) over Turbine shaft and Retaining ring. Mount and tighten Screws (Pos. 8)
with Socket wrench (tool No. TE462A).
Page 14 Instruction Manual, Toftejorg TJ20G
IM-TE91A600-EN2
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