BI001467
________________________________________ Replacement of wear parts Roof cylinder and roof anchor arm removal and Installation (typical both sides) To remove the roof cylinder (reference Fig. 91): 1. Extend the roof anchor arm pullout far enough to rest on adjacent cover. 2. Retract the roof cylinder until the anchor arm pullout rests on cover. 3. Shutdown the feeder breaker (see Shutdown procedure in this manual). 4. Turn the circuit breaker to the “OFF” position and disconnect and lock and tag out the main power source. Follow all standard Federal and mine practices for locking/tagging out power sources. 5. For the left hand roof anchor remove the eight (8) hex bolts located towards the hopper end of the hinged cover above main valve bank. Flip up cover to access roof anchor cylinder and arm. a. If no room to flip cover, pull pins on opposite side of cover and completely remove cover. 6. There are no covers to remove to access the right hand roof anchor, skip step 5. WARNING! Before performing maintenance on the machine, the circuit breaker should be in the “OFF” position and power should be locked and tagged out at the main power source. Electrical shock or accidental machine movement can cause serious injury or death to personnel. 7. Attach an appropriate lifting device to the roof cylinder and take in any slack in chain. WARNING! Serious injury or death can result from falling loads. Observe the safe working load limits of lifting devices and keep a safe distance from suspended loads. 8. Disconnect, tag, and cap the hydraulic hoses going to the cylinder. WARNING! Never disconnect a hydraulic hose if the circuit is pressurized or if there is a load on the circuit. If a hose is disconnected while the circuit is pressurized or a load is on it, the load will fall, causing damage to the machine or serious injury or death to personnel. 9. Pull the upper cotter pin and upper roof cylinder pin. Pull the lower cotter pin and lower cylinder pin. 10. Lift the roof cylinder free from the machine.
______________________________________________________________ A6474X391 REV 4 5.161
