[horsa]

Yep, Ron is correct in that the wooden block is to stabilize the bottle jack. Added a low res copy of the page from the manual showing part of the tool layout since it has some references. Item K is also used with the jack. The tapered end goes into the pipe hole where the bogie spring suspension assembly mounts. And the part that protrudes is the jack mounting point for raising the carrier during track repairs in the field.

So far nobody has been able to tell us what the brake tool B was used for. It seems to be a guide for lining parts and bolts up based on the holes on each side.

The open-ended wrench I'd asked about, along with what maker provided T-16 hand tools during the war, is item AR. This should be a 3/16 x 1/4 size wrench in the USA standard pattern.