  We analyse in this paper the large N limit of the Schwinger-Dyson equations
in a rank-3 tensor quantum field theory, which are derived with the help of
Ward-Takahashi identities. In order to have a well-defined large N limit,
appropriate scalings in powers of N for the various terms present in the action
are explicitly found. A perturbative check of our results is done, up to second
order in the coupling constant.
