Hi Mutt -
You have asked a good question. I can confirm that what Steve said is correct. Litter bearers would have been issued the same medical kit equipment as Company Aid Men.
Per TO&E 7-11, Medical Detachment, Infantry Regiment, dated 26 Feb 1944, each INF BN had 12 litter bearers with an MOS of 657 which TM12-427 July 1944 lists as Medical Aidman and includes "First-Aid Man, Medical Basic, Hospital Orderly, Medical Corpsman (AAF) and Litter Bearer". Responsibilites include "Administers first-aid treatment to sick, injured or wounded....Must have received medical basic training."
Each INF BN had 32 enlisted men assigned to the medical detachment including the 12 litter bearers. The equipment list of a BN Aid Station included (2) Medical NCO kits and (30) Medical Private's kits - a total of 32 kits for enlisted medical soldiers. Each of the kits included 2 litter carrying straps that would attach to the kit suspenders.
The training outline for how and what new Soldiers are taught is outlined in MTP8-101. The June 1944 version says this about litter bearers -
"The litter bearers operate as 2 man or 4 man litter squads. They operate within the sector or zone of actions to which assigned, and search for casualties who are not able to walk. They apply necessary emergency treatment if this has not been previously accomplished by the company aid man [in other words combat medics]. They promptly carry wounded who are not able to walk to the battalion aid station."
One interesting note about the MTP is that it does not explicitly mention MOS 657 but does mention training for basic medical soldier as MOS 521. TM12-427 labels 521 as a basic trainee - personnel who are in basic training or not qualified for a MOS. I think it is safe to assume that company aid men and litter bearers would have followed this training program.
'43 Dodge WC54
piles of smelly green stuff
a couple of band-aids