My first post on the new thread, so I'll try to do something helpful.
I watched another episode of
Tank Overhaul, this time about the M18 Hellcat. As seems to be the norm, there's some useful information, isolated between sections of rubbish (for some reason, there's a lot of comparative stuff about the Abrams, which isn't the obvious choice to match up a WW2 TD against; and some not very good CGI which shows M18s slugging it out in the open field against Panthers).
Here are the bits to look for:
07.38 torsion bar suspension
08.37 claim of 53mph top road speed
10.37 some interesting (to me) stuff on CAD aid in making new components (they used cardboard prototypes to test for fit, then redid them in steel if they matched)..
15.32 ride quality
16.25 some rather confusing/incorrect info on HEAT rounds, which were widely used in WW2, but not AFAIK by the 76mm.
23.10 instrument & gauge repairs
24.20 engine, maintenance: tailgate access, engine change, oil pumps
26.40 engine access, no difficult fluids (radial)
27.33 coldness of fighting compartment - engine sucks in cold air
30.47 engine replacement & testing
31.22 drive shaft connections
32.00 engine start/ignition: need to handcrank x 50 to clear cylinders and avoid fuel fires (this must have been fun, and somewhat tactically inconvenient)
36.40 plus/minus features of open top turret
42.20 turret info: diameter 68" (presumably the turret ring); weight c5000lbs.
There's a lovely section at the end where the original WW2 commander got a ride in the restored vehicle. He died on 25/8/13, aged 95. RIP Don Breinholt.