Rear circulator pump leaking coolant

July 12, 2011, 09:05:49 pm

Saw a spot of coolant under the rear of the coach today and noticed the circulator pump leaking coolant. This is the one on the driver's side that is connected to the coolant lines coming from the back of the engine (Cummins ISL 370). The pump assy is made by MP Pumps Inc (model# 29924). Others here have identified this pump as p/n 28985, but I think this is just the motor? MP Pumps Inc said they are not set up to sell retail and were doubtful that any of their vendors would have these seals, but they gave me contacts for all of their four vendors. The first three didn't have them, but I got lucky with the last vendor. Good thing because I would have had to buy 80 each to get them, or buy the whole pump assembly. The vendor is MaCandless Truck International in Colorado, 303 739-9900. The part numbers are as follows: O ring = p/n 28613, seal assy = p/n 28984.
Thought I should look at the front Hurricane circulator pump which is made by March Pump Inc. The pump is presently not leaking, but I am getting a spare O ring p/n 0809-0027-1000 compliments of March Pump Inc. Just passing on the info FYI.

Larry, 03 Allure, 30856

Re: Rear circulator pump leaking coolant

Reply #1 – July 13, 2011, 10:20:56 pm

Yahoo Message Number: 72700

Thanks, Larry. Your info should prove helpful to many of us in the future. I've put that info in my IPod notes file so it will be with me if I ever need it.

Ray

2000 Intrigue 11040

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