| Author | Message | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 370 Registered: 1-2010 Posted From: 68.151.225.213  Rating: N/A |
On our MCI 102D3 we have a diaphragm pump, much like you would use as a fresh water pump, to return coolant from the expansion tank back to the coolant reservoir above the radiator. The pump is actuated by a switch located on the rear control panel. When activated the pump runs but doesn't move any coolant so I guess the diaphragm is worn out. The question is how to remove the pump without draining the radiators and upper reservoir? I was told that there is a check valve that should prevent the coolant from coming out the discharge line of the pump but I can't find anything that might be a check valve anywhere after the pump and I don't want to pull the hoses off the pump and lose all my coolant. I would also like to avoid draining the coolant if possible. Anyone? | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 724 Registered: 7-2004 Posted From: 75.91.206.80  Rating: N/A |
Les, the check valve is in the pump. My method was to use a couple of pairs of long jawed vice grips with some wood covers on the jaws. Which pump do you have? Shur-flo, Flo-Jet, Etc? I have a whole bunch of water pump stuff available, I'll send you what you need if I have it. | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 372 Registered: 1-2010 Posted From: 68.151.225.213 Rating: N/A |
Not sure you if it is a shur flow or flow jet. It is likely a shur flow because it has the 3/8s fittings that they use. I use both styles of pumps for distillers and other water movement so I can rebuild most of them. the only part that would be a problem would be the 24 volt motor and it seems to be ok. I think that I will use the long nose vice grips to pinch off the lines. I don't want to do it that way because the lines are rubber/ steel mesh. I guess if I damage them then they needed to be changed anyway and I will be forced to drain the system to do that. thanks for the offer Dal Les | ||
| Larry & Lynne Dixon (Larry_d)
Registered Member Username: Larry_d Post Number: 348 Registered: 7-2005 Posted From: 50.39.221.113  Rating: N/A |
Les You would loose a little bit but you could slid off and put a wood plug in the hose. Shouldn't loose to much tho. | ||
| Tony LEE (T_lee)
Registered Member Username: T_lee Post Number: 87 Registered: 11-2007 Posted From: 64.134.226.47 Rating: N/A |
Doesn't the pump return the coolant to ABOVE the coolant level in the top tank. Poor engineering if it doesn't. Easy enough to poke a plastic hose down through the filler neck and syphon the upper tank dry. |