John Deere 450H Might Be a $100 Fix… or $15k Mistake

Описание: We picked up this John Deere 450H dozer with one heck of a story. It was sitting inside a barn until the barn literally blew away in a storm. Ever since, it’s had just enough power to creep in reverse… and nothing else.

John Deere already tried the “easy fixes” — batteries, filters — but that didn’t do it. So we brought it back to the shop to see if this problem is a $100 filter issue or a $15,000 hydrostatic disaster.

In this episode we:

1. Diagnose the hydrostatic transmission issue
2. Inspect and replace filters
3, Pull the controller to check for power and codes
4. Chase down stuck valves and bad pump behavior
5.Try to get this 450H back to pushing dirt again

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🕐 Chapters with Timestamps
00:00 – Intro & story setup
00:09 – The barn blew away — what happened to the dozer
01:06 – Why it barely moves
02:12 – Unloading the 450H in the shop
04:10 – First checks & fluid inspection
05:12 – Transmission filter teardown
06:46 – Installing new filter, first start attempt
07:30 – Electrical check & controller diagnosis
09:00 – Looking up parts in the Deere catalog
11:20 – Swapping the transmission controller
12:16 – Testing: does it move now?
13:36 – Chasing calibration codes
14:55 – Pilot control valve teardown
15:49 – Stuck spool valve found — freeing it up
17:24 – It moves forward again!
19:03 – Still half speed in reverse — new tests
20:22 – Replacing the PCP valve
22:06 – Testing again: same issue
23:43 – Suspecting internal pump problems
24:54 – Pulling pistons & checking swash plate
26:14 – Getting frustrated — considering pump removal
27:20 – Removing belly pans & cleanup
28:10 – Final thoughts & next-episode tease

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