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#46
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In my case, failure of the pump (during a PO's ownership) caused several traces on the PC board to fry. Someone had done a rather sloppy repair, which I cleaned up. I assume that the pump was replaced at that time but admit I haven't checked it other than measuring the current draw. Rrgrassi, have you measured the current draw of your pump? It would be interesting to compare my 0.9 Amp to whatever yours draws. A larger initial surge is certainly one reason why mine will eventually blow a 1 Amp fuse but yours does not. Then again, my pump could have been replaced years ago and is again getting old.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#47
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#48
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Jeremy, I tested it when I got home from work. I also started a new thread with this info.
Mine varied between .3 and .5 amps. Initial starting draw at engine operating temp was .7 I hope this helps!
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#49
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Good info!
OK, then my 0.9 Amps is too high, suggesting that my pump is starting to fail, probably due to years of crud building up on the pump pieces. I wonder if the pump can be disassembled and cleaned? I have the time and it would be nice to save a few bucks (if cleaning would help). At any rate, it explains why you can use a 1 Amp fuse and I have to go to 2 Amps.
It also tells all of us that, if we install a new pump or are able to operate our old pump as you do, on a 1 Amp fuse, that when the fuse starts to blow from time to time and changing the fuse doesn't help, that it's time to do something about the pump. I'll post to your new thread. It will be nice to get an idea of the current range different pumps draw. Jeremy **** DANGER **** 10,000 Ohms ***************
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#50
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Answer:
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Fixed Auxiliary Water Pump!! |
#51
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#52
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Answer:
Quote:
http://www.peachparts.com/shopforum/general-information/38739-i-rebuilt-my-auxiliary-water-pump.html#post219859 |
#53
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#54
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Here's a fried W126 pushbutton unit, thanks to an auxiliary water pump that drew too much current!
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#55
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Similar to my 123, fried in different places but it's clear that the same thing happened. With care, it's possible to wire around the fried traces. Thanks for posting the pictures.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#56
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It's pretty easy to set up and measure the current draw on the aux pump. On the 124 car it should not draw more than 1.3 Amps. I expect that 1.3 Amps would be a good upper limit for the 123 pump as well.
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#57
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#58
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A few years ago, there was a sad thread here titled 'I Lost it All' about a burnt W123 300D. The OP said his dash started smoking above the climate controls and caught fire while he was driving. He managed to get off the road in time to watch his car go up in flames!
An overheated CCU was the suspect. Carrying a fire extinguisher and adding a fuse to the pump circuit was strongly advised. I have seen a few of these CCU units in salvage-yards where it's plastic case was actually melted or starting to burn. Another reason I chose a 240D and Euro 300TD, and avoided any of the ACC equipped models. Happy Motoring, Mark
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DrDKW |
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