Roof cylinder................................................................ 5

BI016382

________________________________________ Replacement of wear parts

Roof cylinder and roof cylinder mount weldment removal and installation

To remove the roof cylinder (reference Fig. 97):

1. With the anchor arm slightly raised, appropriately block under the anchor arm.

2. Slowly retract the roof cylinder until the arm is resting on the blocking.

3. Shutdown the feeder breaker (see Shutdown procedure in this chapter).

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.

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.

5. Attach an appropriate lifting device to the roof cylinder and take up any slack.

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.

6. 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.

7. Remove the cotter pin from one end of each roof cylinder pin and remove the pins.

8. Slowly lift the cylinder off of the feeder breaker.

BI016382

Replacement of wear parts_________________________________________

To install the roof cylinder (reference Fig. 97):

1. Attach an appropriate lifting device to the roof cylinder and position the roof cylinder into the mount and to the roof anchor arm

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.

2. Install the cylinder pins into each end of the cylinder and secure with cotter pins.

3. Reconnect the hydraulic hoses to the cylinder.

4. Restore power to the feeder breaker.

5. Raise the anchor arm and remove the support

Fig. 97: Roof cylinder removal and installation

Anchor arm

Cylinder pin (typical both ends)

Cotter pin (typical both ends) Roof cylinder