Krueger Crane Systems INC
4699 Colt Road, Rockford, ILL, 61109
C
Trouble
Shut off and light is on.
Cause
1.
Counterweight is missing
2
Jumper plug/cable is missing
3.
Broken relay
4.
Broken Anti-Two-Block switch
5.
Broken cable, bad connection - Main Boom circuit
6.
Broken cable, bad connection - Rooster Sheave, Jib.
Corrective action
1.
Refer to page 16.
2.
Make sure counterweight is free to move
Refer to page 9.
3.
Refer to A, B,,C on page 11.
4.
Refer to A, B, C on page 13.
5.
a.
Check wiring and cable for outside damages and loose connections starting from control panel towards
Anti-Two-Block switch..
b.
Check with an OHM meter (figure 6 on page 7) for an open circuit Take wires off, on terminal No.3 and
No.6 in the control panel. Check at the wires you took off with an OHM meter. If the OHM meter reads a
closed circuit the wiring from the panel to the Anti-Two-Block switch is correct. The trouble is inside the
control panel. If it reads an open circuit the problem is between the panel and the Anti-Two-Block switch.
c
Open the cable reel and take the wires off the cable reel sliprings. Check for an open circuit at the wires
leading towards the Anti- Two-Block switch. If the OHM meter reads a closed circuit the wiring from the
cable reel to the Anti-Two-Block switch is correct. Replace the cable from the control panel to the cable
reel.
d
If the OHM meter reads an open circuit, open the 6 pin receptacle and disconnect the wires on No.2 and
No.3 coming in from the cable reel. With the jumper plug in, check for an open circuit on No.3 and No.4.
If the OHM meter reads a closed circuit the wiring to the Anti-Two-Block switch is correct. Replace the
cable on the cable reel.
e.
If the OHM meter reads an open circuit check the jumper plug. The OHM meter should read a closed
circuit between No.2 and No.4 at the jumper plug. If not replace the jumper plug.
6.
If the Main Boom wiring is correct check the jumper cables and rubber reel and go down the line to the Jib Anti-
Two-Block switch in the same way as you did for the Main Boom circuit.
Phone (815) 874-9402
Telex 25-7498
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