Barkley,
As Grossmann showed, Marx attempted to develop and believed it possible to develop a formal crisis theory without reference to the "excess credit" at the basis of the Kindleberger/Minsky tradition. Since means of payment crises derived their character from the unsaleability of commodities and the non fufillment of a series of payments to which this non-saleability gave rise, what needed to be explained first is how purchase and sale became separated. Indeed Marx finds the recourse to "excess credit" or "means of payment" the kind of obvious theory which would be very attractive to economists.
Marx writes:
"If the crisis appears, therefore,because purchase and sale become separated, it becomes a *money* crisis, as soon as money has developed as a means of payment, and this second form of crisis [non fufillment of a whole series of payments which depend on the sale of particular commodities within a particular time] follows as matter of course, when the first occurs [commodities are not saleable at their worth in a certain period of time].In investigating why the general possibility of crisis turns into a real crisis, in investigating the conditions of crisis, it is therefore quite superfluous to concern oneself with the forms of crisis which arise out of the development of money as a means of payment. This is precisely why economists like to suggest that this *obvious* form is the *cause* of crises. (In so far as the development of money as a means of payment is linked with the development of credit and *excess credit* the causes of the latter have to be examined, but this is not yet the place to do it.)" Theories of Surplus Value, Part II, p. 514-515.
best, rakesh