If you mean stretcher bearers for another unit, for instance one in the front trenches, then I think this is unlikely. There were labour battalions which acted as pools of manpower for tasks like that. The batteries would be sited some distance back, perhaps a kilometer or more from the forward edge of the battle area and so would not be in a good position to assist other units.
However the battery itself may have detailed off certain members to act as stretcher bearers as the need arose, but the primary job of all members was manning the guns and bringing forward the ammunition. There were separate parties known as the ammunition column within the 184 Bde structure for the latter purpose. The main threat the men in the battery faced was what is known as counter battery fire, that is being shelled by the enemy artillery. If the enemy were able to spot the location of the guns they could bring down a barrage which would seriously impair the ability of our guns to keep up the rate of fire. Although the guns were usually sited in gun pits the gunners had far less protection from shell splinters than the infantry in their trenches. The sort of scenario I could imagine for how Frederick Claydon might have earned his MM was that he continued to do his job, such as loading or firing the gun while under attack by the enemy artillery, thus showing great bravery. However the war diary does not refer to enemy fire on any of the batteries, which I would have expected to be mentioned1, since one would have expected there to be damage or destruction of the some of the guns which were far more valuable2 than the men operating them.
1. On 10 September the war diary does record an artillery attack on the ammunition column's (horse-drawn) wagons, noting that there were no casualties.
2. By which I mean by the standards of the time, not today's sensibilities.