Identifying the Surge Suppression Resistor in PDP11 H7140 PSU

Work is continuing on repairing the H7140 PSU from my PDP11/24. Now it seems that the surge suppression resistor across the relay has failed. This resistor is marked as R1 on the printset (p66 and p69) but actually is two components connected in series. The parts list on p71 of the printset lists a 3ohm 7W 5% resistor, but it is not 100% clear if this is supposed to be the surge suppression resistor, although it does seem likely. The thing is I measured the resistance of the two resistors (in-circuit), one was open circuit and clearly the failed component, the other measured 10ohms, it might be failing too I suppose. The two resistors are marked KCC 13-17198-00 8234. I have not been able to find any information on them, so I can't verify the spec and I don't know what to replace them with. Does anyone have any information on these resistors? Thanks Rob