16
INSPECTION POINTS
TROLLEYS (PLAIN/GEARED/MOTORIZED)
Section
Side plates
No bending, crack and ether deformations.
All trolleys
Bolts, nuts, cotter-pins and snap-rings, ect.
No looseness, breakage and missing.
Trolley wheels
No excessive wear on tread and gear sections. Well
lubricated and rotating smoothly.
Bearings
Properly engaged with shafts and rotating smoothly.
Capacity mark
Distinctly observable.
Geared trolleys
Handwheels
Correctly meshing with hand chain. No cracks,
breakage or extensive wear.
Shaft area of handwheels
Well lubricated and rotating smoothly.
Hand chain
No excessive elongation and deformation that can
prevent the smooth meshing with the hand chain.
Motorized trolley
Reduction gear section
No flaw, crack and excessive wear. Well lubricated.
No backlash in the gears and bearings.
Brake mechanism
Stops smoothly without coasting too long.
Power source cable and pendant control
cable
No breakage and damage of the rubber-covered
cables and no disconnection.
Motor
No humming and overheating
lnsulation resistance
lnsulation resistance exceeds 2M Ω by DC 500-volt
Megger.
TEST RUNNING AFTER PERIODIC INSPECTION
Test points
Check points
Test running
Operate the hoist and confirm that it runs smoothly.
Limit switch function
First, test without a load.
Next, test with a load within rated capacity.
Test running with a load within the rated capacity
Check for noise and vibration when hoisting and lowering. Check
the amount of the brake slippage.
Over-loading test
Test run with a 125 % overload.
Table 9
Table 10
