M
AINTENANCE
d) Coat the vanes lightly with high-
performance grease and insert into the
rotor slots with the starting aids.
e) Coat the entire braking piston surface, in-
cluding the brake piston seal, lightly with
high-performance lubricant and push
the brake piston into the internal cylinder
with the braking surface first. Note the
position of the eccentric bore.
f) Insert the brake springs into the bores of
the brake piston.
g) Loosen adjustment bolts
(14)
and lock
nuts
(15)
. Screw back adjusting bolts
sufficiently.
h) Apply high-performance grease lightly to
rotor bearing (needle bush) in the motor
cover and install motor cover. Ensure
correct seating of the brake springs and
the locating pins to the motor housing
and to the brake piston.
i) Do not tighten the four adjusting bolts
after bolting the motor cover in place,
only screw them in loosely by hand to the
stop in the cover. Screw back the lock
nuts sufficiently beforehand.
j) Then screw back the adjusting bolts
45
◦
from the stop, hold and lock with
the nuts. For lifting heights of 10 metres
(33 feet) and more, a setting of up to 60
◦
may be required. For operation in areas
with ambient temperatures exceeding
30
◦
C (86
◦
F), the adjustment must be
carried out with the device warmed up
accordingly.
k) Tighten the nameplate
(1)
.
5. Check the braking action under nominal load
(run in the brake by performing several hoist-
ing cycles, then assess) prior to initial opera-
tion. Check the motor power. In the event of
low motor power, regulate the adjusting bolts
again.
8.20. Replace chain
WARNING
Danger from chain fracture
The chain is subjected to impermissible stresses if
the chain is twisted.
I
Do not twist the chain!
NOTICE
JDN chains are matched in close tolerances to
the sprocket. In order to ensure an optimum func-
tion of the chain and in order to prevent dangers,
only genuine JDN chains may be installed.
NOTICE
If the chain end link of the load chain is positioned
incorrectly, it must be removed. The following
chain link will then be positioned correctly.
The spare parts list contains information about
torques and other representations of the indi-
vidual components.
1. Loosen the chain from the dead end chain
mount
(9)
.
2. Remove components on the idle chain
(1)-(3)
:
a) Loosen the screw connection or drive out
the dowel pin.
b) Pull the buffer disc with edge
(3)
(edge
encloses the buffer), buffer
(2)
and buffer
disc without edge from chain.
3. Remove the load sleeve and buffer
(4)-(8)
:
a) Drive the dowel pin
(5)
out of the load
sleeve.
b) Remove the chain end link from the
chain pocket.
c) Remove the buffer
(6)
and buffer discs
(7)
from the chain.
4. Attach the new chain to the end link of the
load section of the old chain after aligning the
welds by means of an open chain link. The
welds on the upright chain links must face out-
wards when running over the chain sprockets.
5. Switch
PROFI 3 TI
to Lifting and run the new
chain through the drive chain sprocket. After
Doc.-No.: VA053957-40-OM-EN-0720-60-2
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