Attentions before the maintenance

Item proceeded with asterisk*shall be done by the manufacturer.

The maintenance shall be done after the crane engine is shutdown and the main operation switch is set to off position.

Switch the control lever to relief the remaining pressure(after the engine is stopped)before servicing any pressured pipe.

Keep all the levers, pedals and table surfaces clean. Supply some anti-skid agent to them in order to avoid misoperation.

When cleaning the crane with water, carefully protect the electrical elements and connections from being wetted. The water flow may damage some electric devices.

After the maintenance or repair is completed, carefully check movable parts of the crane to ensure that no tool or cloth or something is left on them before the

 

Maintenance Project

Crane items listed below shall be checked and serviced regularly according to the specified intervals.

 

Maintenance to be performed every 50 hours:

_Examine the system connections for possible oil leak;

_Examine the oil cylinder for possible leak;

_Examine fixing bolts of the crane and other fasteners to make sure they are properly tightened.

 

Maintenance to be performed every 450 hours or 6 months:

_Supply lub grease to rotation bearing.

_Supply lub grease to link points.

_Supply lub grease to telescopic boom.

_Supply lub grease to exposed portion of the oil cylinder piston rod.

_Examine the slide block for possible wear, if necessary, replace the block.

_Examine the wire rope for possible wear, if necessary, replace the wire rope.

_Examine the bolts fixing the rotation bearing to the turntable and base of the crane. Make sure they are properly tightened.

Maintenance to be performed every 900 hours or 12 months:

_Examine hydraulic oil cylinder.(*)

_Examine base bolts. Make sure they are properly tightened.

_Examine hydraulic system and safety device. Make sure they are properly installed and in good working condition. (*)

_Examine bolts fixing the crane. Make sure they are properly tightened.

_Examine steel structure of the crane(*)

_Examine or replace set screw and slide block.

_Replace hydraulic oil.

If the crane is not to be used for a long period of time(more than 18 months),the folowing maintenance shall be performed:

_Remove dust and oil sludge off the crane body and keep the body clean.

_Retract all cylinder pistons to the shortest position.

_Lubricate moveable parts with grease.

_Clean the sand and dust off the wire rope and supply ZG-S lime-base graphite grease.

_Place the crane in ventilated and dry house. If outdoor storage is the case, take proper weatherproof measures to protect the crane from being wetted.

_Start the crane once every month and operate the crane units for idle run to examine their working status.

 

Crane Maintenance

Lubricate the linkage points

Linkage points as shown below shall be regularly lubricated. Supply lubricant to alinkage point in a pressurized way until it overflows. Activate the points several times for complete action and then add a bit more lubricant to them.

 

Lubricate the telescopic boom

Stop the crane at the position as shown below to lubricate the boom outside. Remove the old grease with a rubber tapping knife and then use a bush to coat the entire boom outside with new grease.

WARNING: Property of grease used with the crane shall be compatible with those specified in this chapter.

 

Hydraulic Oil Replace

Make the crane furlЈfind a big container load the hydraulic oil of the oil tank.

Make the container under the oil tank, open the bolt of the bottom of the tank, expel the oil from the tank, then replace the bolt.

ATTENTION ЈєPrevent the hot oil fire.