7.2.1 SLIDE REMOVAL (FIGURE 17)
Step 1: Start from the closed position.
Step 2: Remove bolts and nuts (items 3 and 4) that are used to join
the stem (item 5) and slide (item 2). For the non-rising stem
configuration, the stem nut shall be detached from the slide.
Step 3: Remove bolts and nuts (item 9 and 10) with caution, as
major components of the penstock (yoke, operator and
stem) are no longer secured.
Remove the stem (item 5), yoke (item 8) and the operator
(item 11) as one item.
Step 4: Remove bolts and nuts (items 6 and 7) in order to be able to
remove the slide.
Step 5: Remove the slide (item 2).
7.2.2 SIDE SEALS REPLACEMENT (FIGURE 18)
Step 6: Remove bolts, washers and nuts (items 3, 4 and 7) from
the
slide and remove retainers (items 2), lateral HMWPE
guides (items 4) and front HMWPE guides (items 5).
Step 7: Remove side seals (item 8) and replace it by the new seal.
Note 1: Apply glue where the bottom seal and side seals join.
Note 2: After installing the new seal, apply grease on it to
ease operation.
7.2.3 BOTTOM SEAL REPLACEMENT (FIGURE 18)
Step 8: Remove bolts and nuts (items 10 and 12) and remove
bottom retainer (item 9).
Step 9: Remove bottom seal (item 13) and replace it by
the new seal.
Note 1: Apply glue where the bottom seal and side seals join.
7.2.4 REASSEMBLY
Follow steps 9 to 1.
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK CHANNEL PENSTOCKS
SERIES 772/71
Page 11/12
MI ChannelPenstock772 rev AB August 2014 GB
1
2
5
7
6
4
3
8
9
11
10
Figure 17: Slide removal
6
7
4
3
2
8
9
10
13
12
1
5
Figure 18: Side seal and bottom seal replacement
