- 20 -
(7) Remove the drum cover from the drum (Refer to Figure 20 on page 19).
・
Move t he drum co v er upw ard about 15m m and chec k t he i nt ernal spri ng
does n ot po p out , t hen rem ove t he drum cover.
(8) Follow the disassemble and reassembly procedures depending on the spring structure.
13 -2. Di sasse mbl y an d r easse mbl y acc or di n g t o spr i n g st r uct ur e
・
The spri ng i s da ng erous due t o i t s t ensi onal energy .
If i ncorrect l y handl e d, t he s pri ng w i l l exp and e xpl osi vel y an d c ausi ng pers onal
i nj ury.
・
Never rem ove t he s pri ng, w hi ch i s not i n st al l ed i n t he case , f rom t he drum
w i t hout w el di ng t he s t eel pl at es t o t he spri ng.
Never use gas w el di ng, onl y use arc w eldi ng.
・
Never rem ove t he s pri ng f rom t he spri ng case.
If i t i s rem oved f rom t he spri ng c ase, t he s pri ng w i l l expand e xp l osi vel y and
causi ng pers onal i nj u ry.
・
Never rem ove t he band f rom t he new spri ng bef ore repl acem ent .
・
H ol d t he cent er of t he new spri ng, w hi ch i s bou nd w i t h t he b and, by h and t o
prevent f rom f al li ng w hen handl i ng.
If t he cent er f al l s, t he spri ng w i l l expan d expl osi vel y an d causi ng perso nal
i nj ury.
・
Never t urn t he spri ng case upsi de dow n.
If t urned upsi de dow n, t he s pri ng ce nt er w i l l f al l and t he spri ng w i l l burst out
f rom t he spri ng case, causi ng personal i nj ury.
■
For spring structure A (1 spring)
(1) Weld steel plates to the spring in order to
prevent the spring from expansion.
Use steel plates with enough length to cover the
periphery of the spring, and weld along the
whole length.
NOTE: Wipe off all grease from the spring
surface to avoid grease combustion.
(2) Remove the welded spring from the drum.
NOTE: When removing the spring, the notch
key and two notch springs will drop
out from the spindle.
Take care not to lose them.
(3) Remove the bush from the spring.
(4) Before reassembly, clean and inspect all the
disassembled parts.
Replace worn, cracked, damaged or deformed
parts.
Ｓｐｒｉｎｇ
Ｎｏｔｃｈ ｋｅｙ
Ｎｏｔｃｈ ｓｐｒｉｎｇ
Ｗｅｌｄ ｂｏｔｈ ｓｉｄｅｓ．
Ｂｕｓｈ
（ｗｉｔｈ ｎｏｎ－ｃｉｒｃｕｌａｒ ｈｏｌｅ）
Ｓｔｅｅｌ ｐｌａｔｅ
Figure 22
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