Boom Lift FIRE! Can It Be Fixed?

My boom lift nearly went KaBOOM!  How does a 3 section boom telescope mechanism work?  I build a model and explain the mechanism in detail.  Then we move on to inspecting and fixing the fire damage.  Lots of wire repair, several hydraulic hoses, a grease hose, and some cleanup and...does it work?

Part 1 here: https://youtu.be/2FshuIN-4nk
Complete boom lift series here: https://youtube.com/playlist?list=PLHACLo2Ax7LGkXGO0Q5IqdV8cI8d-ms0R

My parts supplier:
Bennett Equipment and Supply
864-277-7272

HEY ENGINEERS! - Regarding the chain tension, the tensioners are torqued to 50 ft-lbs, and it's a 3/4" 10 TPI thread.  What would the max tension on the extend chains be assuming the lift is pointing straight up, the fly boom and basket weigh 1200 pounds, and there's 1000 pounds in the basket, for a total of 2200 pounds being lifted?

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00:00 Intro
1:13 Start building model
5:45 Model demonstrated
15:35 Troubleshoot fire damage
17:15 Soldering wires
22:15 Meanwhile
24:00 Holding valves
26:24 How to raise the boom
31:20 Assess fire damage
34:35 Problem found and fixed
36:00 Assess hydraulic lines
40:40 New parts
41:32 Install new hydraulic lines and clean up
48:32 Getting it to work finally

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