14
4.4 De-Rigging
(1) Before de-rigging each tirak
™
hoist must be
unloaded by bringing down the platform to a safe and
stable support.
(2) Remove the loop at the free wire rope end.
(3) Press DOWN button to let the wire rope run out.
(4) With gloved hands slowly pull the wire rope through
BSO secondary brake.
(5) Clean the wire rope,
reel
it (Fig. 22), and store it in
a clean and dry place.
Figure 22 Wire Rope Handling
5. Operating Instructions
Figure 23
BSO Secondary Brake
Check I
Wire rope loop
(d1) OPEN
(d1) Closed
Reset (d1) to the open position.
III
During operation regularly check through the win-
dow (d3) that the centrifugal weights are rotating
(Fig. 24).
WARNING:
IF DURING ONE OF THE CHECKS THE
BSO SECONDARY BRAKE MALFUNC-
TIONS, IT MUST BE REPLACED.
EMERGENCY
STOP (d2)
Figure 24
BSO Secondary Brake
Checks II + III
EMERGENCY
STOP (d2)
(d1) Open
(d1) CLOSED
(d3) Window
5.1 GENERAL
(1) BE FAMILIAR with the equipment and its proper
care.
DO NOT operate hoist, if adjustment or repairs are
necessary, if any warning, operating or capacity
label normally attached to the hoist is obscured, dam-
aged, or missing. (See labels’ list on page 35).
REPORT same promptly to your supervisor and
also notify next operator, when changing shifts.
( 2 )
WA R N I N G : S A F E T Y D E M A N D S
THAT YOU TEST THE SYSTEM
BEFORE GOING ALOFT:
a) CHECK
PLATFORM
fully rigged and loaded by
cycling UP and DOWN several times near ground
level or safe surface.
b) CHECK
PRIMARY BRAKE
for mechanical func-
tion: When stopping the hoist the load must be
held immediately.
c) CHECK
BSO SECONDARY BRAKE
:
I
At ground level
fi
rst close the BSO secondary
brake by pushing EMERGENCY STOP button
(d2). Then push control lever (d1) in DOWN-
position and make the wire rope form a loop
between tirak
™
casing and BSO secondary brake
(Fig. 23). Open BSO secondary brake by pulling
down control lever (d1) until it locks in the open
position.
With gloved hands sharply pull wire rope in arrow
direction (Fig. 23) – the BSO secondary brake
should close immediately (Fig. 24). Reset BSO
secondary brake by pushing down control lever
(d1) until it locks in the open position.
II
Lift platform 3 ft. (1 m) above ground or safe sur-
face, and push EMERGENCY STOP button (d2)
of the BSO secondary brake (Fig. 24).
Lower the platform to check that the BSO second-
ary brake holds the load. A loop should form as
shown in Fig. 23, which means the BSO secondary
brake is supporting the load.
Raise platform until the hoist supports the load.
