JUKI LK-1900B series, Руководство инженера

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Adjustment procedures Results of Improper adjustment
1. Loosen the two setscrews
❺
and increase the backlash of the
lower shaft gear ❸ .
(Caution) If the lower shaft gear
❸
has insufficient backlash,
the oscillator ❷ does not swing correctly. In such a
case, refer to "3.-(5) Lower shaft backlash adjustment
and connection/disconnection" and provide a suffi -
cient backlash.
2. The two setscrews ❶ and the two setscrews ❼ should have
been loosened in advance. In this case, the second screw of the
setscrews ❶ and ❼ should be loosened first. Then, the first one
can be loosened.
3. Adjust the clearance to 8.5 to 9.0 mm between the oscillator ❷
and the frame, and decide the positioning of the oscillator
❷
.
4. Tighten the two setscrews ❼ and then fix them so that the oscil -
lator
❷
is not displaced.
(Tighten the first screw first so that it comes in contact flatly with
the oscillator shaft
❹
. Then, tighten the second one.)
5. Tighten the two setscrews ❶ and fix the oscillator arm ❻ .
(Tighten the first screw first so that it comes in contact flatly with
the oscillator shaft ❹ . Then, tighten the second one.)
6. Refer to "3.-(3) Crank connecting rod connection/disconnection"
and decide the positioning of the crank rod.
7. Make backlash adjustment for the lower shaft gear
❸
, according
to "3.-(5) Lower shaft backlash adjustment and connection/dis -
connection".
(Caution) 1. In the case of disassembly and adjustment, grease
up treatment is always needed for the specified
places (2 positions) and the gear area A of the os-
cillator
❷
.
2. When the crank rod (under-cam) is removed, ac -
tions for oscillator gear positioning must be taken,
without fail.
Refer to "3.-(3) Crank connecting rod connection/
disconnection".
o
If the position for fixing the oscil -
lator ❷ is inadequate, this can
also be a cause of the frictional
wear or lock-up of the oscillator
pin, crank rod lid, under cam,
and the crank rod.
Adjustment procedures Results of Improper adjustment
1. Loosen the setscrew ❶ and remove it.
2. When the adjusting screw
❷
is tightened, the quantity of oil can
be regulated for the lubrication pipe left ❹ .
3. After adjustments, tighten the setscrew
❶
to fix it.
(Caution) 1. In the state of standard shipping, the hook lubri -
cation reducer
❸
is positioned so that it is lightly
tightened and then return-loosened by 4 turns.
2. When reducing the oil amount, the screw should
not be tightened up fully. Tighten the hook lubrica-
tion reducer
❸
and then return it by two turns. In
this position, wait for half a day to see how it goes.
Too much reduction can be a cause of hook wear.
o
If the amount of hook lubricant
is reduced too much, this can be
a cause of frictional wear of the
hook race plane or lock-up.