Maintenance:

1), bridge cranes appearance: a comprehensive clean appearance, so that no dust, no yellow robe. Check for cracks, open welding.
2) carts, trolleys: ① check and tighten the shaft seat, gear boxes, couplings and shafts, keys are loose; ② Check and adjust the brake wheel clearance to make it uniform, sensitive and reliable.
3), check the bridge crane reducer mainly to see if it leaking. Runtime cabinets abnormal sound, we must open the lid inspection. Generally due to bearing damage or gear backlash is too large, severe tooth wear due to other reasons.
4), the lifting winch: ① Check wire, hook, the blocks are safe and reliable, wear exceeds a predetermined value should be replaced. ② Check and adjust the brakes, to make it safe, sensitive and reliable.
5), overhead crane wire rope inspection. Check the broken wire rope should focus on observation, abrasion, kinks, rust, etc., for some wear and tear, broken wire is more serious but not excessive position, to do a mark in order to focus on tracking the re-examination. Make sure to check the safety rope on the drum stopper is valid, wire rope on the drum plate number plate is pressed and appropriateness.
6), Lubrication: Check all parts of the oil, fuel, lubricating oil required to join or replace.
7), the inspection of the overhead traveling crane pulley. Focus on the bottom wear is excessive and cast iron pulleys forklift jacks. For institutions pulley overlooking Yang balance wheel, because it does not operate normal conditions, it is easily overlooked. So, be sure to check before installation flexibility of its rotation, otherwise, the installation length of rope around overlooking Yang and tension can not balance wheel to automatically adjust, so that an increase in the height adjustment overlooking Yang rope and operational risk level of difficulty.
8), electrical: ① Check the limit switch is sensitive and reliable; ③ Check the electrical box in the electrical action is sensitive and reliable; ③ check the motor, bells, wires are safe and reliable; ④ Check the signal is good.
9) Check the overhead crane and even the loose coupling "scroll keys." Focused on checking flexible pin coupling elastic rubber ring without abnormal wear on tooth gear coupling ring to pay special attention to its wear condition. Poor accuracy due to the installation, the two large offset between the shaft case, the performance of the entire ring will soon wear short bald. If the lifting mechanism in such a case, prone to serious accidents.