12
3.3.3 Connection to the air supply
1)
Attach air hoses and air preparation unit to the
work platform. It is important that all air line con-
nections are locked and supported by a strain
relief device. The weight of the air line must not be
carried by the TIRAK
®
hoist power inlet connec-
tion.
2)
Before connecting the hoist :
a) Start the compressor and slowly apply air pres-
sure to the hoses.
b) Blow through the air supply hose leading from
the air preparation unit to the hoist to avoid
impurities entering the motor.
c) Shut off the compressor and let all air pressure
be bled from the supply lines.
d) Pour a small amount of oil into the air hose.
e) Connect air hoses to the hoist.
3)
After all connections are made :
a) Start the compressor and slowly apply air pres-
sure to the hoses.
b) Inspect all air hoses to ensure that they are in
good condition and that connections are not
leaking.
c) By means of regulator, adjust the supply sys-
tem to the required 85 psi
d) Run the motor for approx. 2 seconds to let the
oil completely distribute in the air motor. This
means higher performance and an increase in
service life.
4. Wire Rope
4.1
Wire rope specification
Use only wire ropes specified by the manufacturer:
(1) Classification/Construction:
5x19, 4x26, 5x26, with fiber core, or 6x19 (min.
17 wires/strand), galvanized or black, lubricated,
preformed IPS or XIPS.
Figure 19
Checking Wire Rope Diameter “d”
Incorrect
CORRECT
Figure 20 Wire Rope Handling
d
(2) Diameter:
CAUTION: Correct wire rope diameter within the
allowable diameter range is very impor-
tant for the TIRAK
®
function!
UNDERSIZED wire rope may cause slip-
page in the hoisting mechanism and in
the BSO secondary brake.
OVERSIZED wire rope may cause dam-
age to the guide band and other internal
parts or jam in the hoist causing damage
to the wire rope itself!
It also may cause the BSO secondary
brake to malfunction.
NOTE: How to measure wire rope diameter:
The correct diameter of the wire rope is
the largest cross-sectional measurement
across the strands (and not the valleys).
The measurement should be made care-
fully with calipers as shown in Fig. 19.
1) Allowable diameter range of NEW wire rope:
5/16 in. (8.4 mm)
=
0.319 to 0.331 in.
(8.1 to 8.4 mm)
3/8 in. (9.5 mm)
=
0.362 to 0.374 in.
(9.2 to 9.5 mm)
Table 5: Wire Rope Diameter and min. actual Breaking Strength
wire
min. actual
for TIRAK
®
hoists
rope
breaking
with
diameter
1)
strength
rated load up to
5/16 in.
10,000 lbs
1,500 lbs
8.4 mm
44.5 kN
680 kg
3/8 in.
15,000 lbs
2,000 lbs
9.5 mm
66.8 kN
900 kg
4.2 Wire rope rigging instructions
WARNING :
Be sure to use a wire rope with the
diameter marked on the TIRAK
®
nameplate.
CAUTION:
Always unreel and reel the wire rope
in a straight line (Fig. 20) to prevent
kinks, which make it unusable for
the hoist.
(1) RIG FROM TOP.
You should have enough wire rope to reach to the
ground or other safe level with about five feet
(1.5 m) extra for ensuring safety.