# Step-by-Step Solution: Removing & Installing a Hydraulic Cylinder Let's analyze the procedure for safely removing and installing a hydraulic cylinder. The main priorities are **safety**, **equipment protection**, and **following proper sequence**. --- ## Step 1: Understand the Main Steps To safely work on hydraulic machinery, you must: 1. **De-energize**: Turn off all power sources (electrical, hydraulic). 2. **Lockout/Tagout**: Secure the equipment so it cannot be accidentally restarted. 3. **Remove Guards**: Take off any protective covers or barriers. 4. **Replace Cylinder**: Remove the faulty cylinder; install the new one. --- ## Step 2: Analyze the Options Let’s review each option, step by step. ### Option A > Lockout, de-energize, remove guard, replace cylinder - **Lockout before de-energize:** Locking out before de-energizing is unsafe. Power should be off first to avoid accidental movement or electric shock. - **Conclusion:** Incorrect order. --- ### Option B > De-energize, replace cylinder, lockout, replace guard - **Replace cylinder before lockout:** This is dangerous; the equipment could still be accidentally powered on. - **Lockout should come before any servicing.** - **Conclusion:** Incorrect order. --- ### Option C > De-energize, lockout, remove guard, replace cylinder - **De-energize first:** Safely turns off all energy sources. - **Lockout second:** Prevents accidental re-energization. - **Remove guard third:** Only after machine is confirmed safe. - **Replace cylinder last:** Now it’s safe to work on it. - **This follows proper safety protocol.** - **Conclusion:** **Correct order.** --- ### Option D > Lockout, remove guard, de-energize, replace cylinder - **Lockout before de-energize:** Locking out before the machine is powered down can leave stored energy in the system. - **Remove guard before de-energize:** This is unsafe; guards should only be removed after equipment is confirmed safe. - **Conclusion:** Incorrect order. --- ## Step 3: Detailed, Safe Procedure (Based on Correct Option) ### 1. **De-energize** Turn off and disconnect all energy sources: - Main power supply (electric) - Hydraulic pressure (release residual pressure) ### 2. **Lockout/Tagout** Apply lockout/tagout devices to all energy sources: - Prevents accidental re-energization - Attach warning tags ### 3. **Remove Guards** Take off any covers or barriers: - Only after confirming zero energy state ### 4. **Replace Cylinder** - Disconnect hydraulic lines (have a pan for fluid) - Unbolt and remove the faulty cylinder - Install the new cylinder - Reconnect hydraulic lines ### 5. **Reassembly and Testing** (not explicitly listed, but always necessary) - Replace guards - Remove lockout/tagout devices - Re-energize and test for leaks and operation --- ## Final Answer **The correct answer is:** > **C. De-energize, lockout, remove guard, replace cylinder** --- ## Why Other Options Are Incorrect - **A & D:** Lockout before de-energize is unsafe; you must remove all energy first. - **B:** Never replace or service equipment before lockout/tagout is applied. --- ## Visual Summary | Step | Purpose | |---------------------|----------------------------------| | De-energize | Remove all stored energy | | Lockout/Tagout | Prevent accidental startup | | Remove guard | Allow safe access | | Replace cylinder | Perform the maintenance task | --- **Always follow your organization’s safety protocols and refer to equipment manuals for specifics.**