Saving Dad's 1993 Komatsu Excavator

Dad's 1993 Komatsu excavator has been in the family since it was brand new — bought when Kevin's dad was 12 years old, still running original paint and even the original seat. But the left-hand track has been getting weak, so we break out the (nearly incomprehensible) Japanese service manual, throw gauges on the main pumps, and track the problem down to the rotary manifold in the swivel joint. Pull it, inspect it, find the worn seals, rebuild it, and get the old girl back to full strength. Need parts for your own equipment? Head over to ccsurplusparts.com for everything you need. 🛒 Hats, shirts & merchandise → ccsurplusparts.com 🎥 Early access & behind the scenes → patreon.com/cncequipment 👢 Brunt boots, code CC10 for a discount Don't forget to like and subscribe — more big stuff coming to the channel later this summer. 0:00 – Meet the 1993 Komatsu, bought new for ~$120K 2:22 – The problem: weak left-hand track 3:12 – Reading the Japanese service manual, pump theory 4:10 – Target pressure specs (5,000 PSI travel / 4,800 PSI arm-boom) 5:45 – Warming up the machine, gauge setup 9:21 – Cold pressure check 10:32 – Gravel pile test confirms the weak track 11:07 – Pinpointing the swivel joint as the culprit 12:12 – What the rotary manifold does 14:52 – Pulling the manifold (next day, over the pit) 18:08 – Manifold out, breaking down how it works 19:50 – Inspecting the seals — found the problem 21:04 – Installing new seals 23:08 – Reassembly 27:14 – Leak check and re-test 29:47 – Checking swing ring grease 31:49 – Wrap-up and what's coming this summer #Komatsu #ExcavatorRepair #HeavyEquipment #hydraulics