35
(3) BLOCSTOP BS/BSO secondary brake function.
I
At ground level or on a safe surface push con-
trol lever/valve in DOWN position to get slack
in the primary wire rope: release lever (e3) tilts
to the side to close BS/BSO secondary brake
on the secondary wire rope (Fig. 63).
With gloved hands try to pull the secondary
wire rope upwards: it must be impossible.
II At ground level first close BSO secundary brake.
Then push control lever/valve in DOWN posi-
tion and make the wire rope form a loop between
TIRAK
®
casing and BS/BSO secondary brake
(Fig. 63). Open the BSO brake again (e1).
Push release lever (e3) in its upright position
and with gloved hands sharply pull primary
wire rope in arrow direction (Fig. 63) – the
BS/BSO secondary brake should close imme-
diately (Fig. 64).
Reset BS/BSO secondary brake by pushing
down control lever (e1) until it locks in the open
position.
III Lift platform 3 ft. (1 m) above ground or safe
surface, and push EMERGENCY STOP button
(e2) of the BS/BSO secondary brake (Fig. 65).
Lower the platform to check that the BS/BSO
secondary brake holds the load: A loop should
form as shown in Fig. 64, which means the
BS/BSO is supporting the load.
Raise platform until the hoist supports the load.
Reset (e1) to the open position.
IV During operation regularly check through the
window (e5) that the centrifugal weights are
rotating (Fig. 65).
(4) Wire rope: free of kinks, cuts, broken wires, bird-
cages, heat damage, contamination etc.
(5) Wire rope corrosion due to acid or caustics. Re-
place wire rope if exposed to these contaminants.
(6) Wire rope lubrication: The wire rope has to be
clean and lightly lubricated.
(7) Rigging
Wire rope termination, connection to the suspen-
sion system. It must be aligned and secure.
(8) Check for parts damage
WARNING! If there is any:
STOP working, unless the dam-
aged part(s) is (are) replaced.
(9) Safety harness(es), lifeline(s), fall arrester(s)
and lanyard(s) must be used at all times in
accordance with the requirements of OSHA regu-
lations and state, provincial or local codes.
Fig. 63
BS/BSO
Secondary
Brake
Check I
Fig. 65
BS/BSO Secondary Brake
Check III / IV
Fig. 64
BS/BSO Secondary
Brake
Check II
Primary wire
rope loop
(e1) Closed
(e1) OPEN
Primary
wire rope
(e3)
(Secondary
wire rope)
(e1) Open
(e1) CLOSED
(e2) EMERGENCY
STOP
(e4) Window
Secondary
wire rope
Slack primary
wire rope
(e3)
(e1)
(e2) EMERGENCY
STOP
(e2) EMERGENCY
STOP
