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crawler lift jacks 5
CRAWLER LIFT JACKS
purpose
The crawler lift jacks provide a means of vertically lifting the BTP while still keeping the crawlers on the ground to make tramming possible. This provides the BTP with more ground clearance and allows it to negotiate rough terrain. The lift jacks can also raise the BTP frame completely off of the mine floor for maintenance purposes.
The lift jacks are housed within the crawler frame which are made from welded structural grade steel with high strength heat-treated pinned joints operated by two independently functioning trunion mounted hydraulic cylinders.
Visually inspect all joints to ensure that pins are properly in place by one of the following: bolts, clip pins or roll pins. This depends on the design. Ensure that the hydraulic cylinder and hoses are not leaking or damaged and that the cylinder rods are not bent. Replace or repair any missing or damaged components as required.
construction
maintenance
IMPORTANT Certain designs may provide grease fittings within the head of
each pin. These fittings should be greased monthly.
operation
DANGER
Visually check to make sure there are no obstructions or personnel within the operation range of the lift jacks. Before lifting the BTP, check the location of the stageloader with respect to the ceiling of the entryway to ensure that it has not come into contact with the roof. Providing that the controls are operational (see “Control Station” section), select one or more of the four directional control flippers or levers labeled “Inbye-Walkside”, “Inbye-Blockside”, “OutbyeWalkside”, or “Outbye-Blockside” under the section labeled “Lift Jacks”. Then press the desired direction of operation, “UP” to raise the BTP (lowering the crawlers) and “DOWN” to lower the BTP (raising the crawlers). During operation take care not to jack the BTP and stageloader into the roof or similarly lower the BTP frame onto equipment or any obstruction that may damage the unit. Continue to operate the control valves until the desired BTP position is achieved.
Do not repair or remove retaining pins, hoses or hydraulic cylinders while the lift jacks are supporting the BTP or while they are in operation.
Keep hands and feet from under the crawlers during operation.
IMPORTANT
© DBT AUSTRALIA 2007
