Tadano ATF 130G-5, Translation Of The Original Operating Manual

Page: 489 / 636

5.1.5 Derrick
Fault Possible cause Rectification
The derrick cylinder sinks. Air in the cylinder. Bleed the cylinder.
The brake valve is defective. Replace the valve.
The upward and downward
derrick movements are very
slow.
Control pressure is too low. Reset the control pressure.
The control piston in the 2-
stage control unit is defective.
Replace the valve.
The brake valve is defective. Replace the brake valve.
The sintered filter in the brake
valve is clogged.
Replace the filter.
The derrick cannot be lowered. The brake valve is defective. Replace the valve.
The pressure limiting valve is
defective.
Replace the valve.
The sintered filter is clogged. Replace the filter.
No fast run while raising. The fast run valve in the valve
block is defective.
Replace the valve.
The switch in the crane control
lever is defective.
Replace the switch.
5.1.6 Hoisting gear
Fault Possible cause Rectification
The load is lowered slowly or in
a jerky motion when the hand
control lever is set to the mid‐
dle position.
The hydro-multi-disc brake is
worn out.
Replace the complete disc set.
The free run is defective. Replace the free run.
The hoisting gear turns very
slowly.
Control oil pressure is too low. Check the pressure at the test
connection.
The sintered filter is contami‐
nated.
Replace the filter.
The hoisting gear is too slow
while lowering.
The replenishing valve is leaky. Replace the valve.
The hoisting gear does not
function.
AML has switched off. Re-actuate the AML.
The anti-twoblock device is
switched off or is defective.
Release the cylinder and/or re‐
place the switch.
The crane control lever is de‐
fective.
Replace the crane control lev‐
er.
The valve in the 1-stage control
unit is defective.
Replace the valve.
The hoist gear motor is defec‐
tive.
Replace the hoist gear motor.
No fast run. The fast run valve in the valve
block is defective.
Replace the valve.
The fast run valve in the valve
block is defective.
Replace the switch.
5 Rectifying the faults
ATF 130G-5 2146097
2014-09
489