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Old 05-01-2013, 08:43 PM   #1
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Default Water Pump Mechanical Seal Replacement

Anyone here had their water pump leak and had to replace the mechanical seal? How complicated is it? My bike only has 7200 mi showing on odometer.
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Old 05-01-2013, 10:34 PM   #2
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old,

I didn't have a leak but I did replace the mechanical seal when restoring Hidaglo.

According to the service manual the procedure is fairly straightforward. Use the rear brake with the transmission in 1st gear to remove the *LEFT* handed impeller and shaft. Torque to shaft 18 ft-lbs and the impeller to 87 in-lbs when reassembling.
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Old 05-02-2013, 11:22 AM   #3
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Bill: I'm not really sure it is the seal that is leaking. When I return from a ride, a very small amount of coolant "appears" to be seeping out around a bolt with a black washer that looks like a gasket. This bolt is located on the engine adjacent to the rear of the brake pedal spring. I can't figure out how to get a pic of it. It doesn't "seem" logical that that part of the engine (clutch case or crank case) would have coolant in it?
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Old 05-02-2013, 08:54 PM   #4
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old,

I took at look at my pile of parts and found the original water pump from Hidalgo. On the back side of the water pump base is the 'weep hole'. Seepage from this hole would flow down the back side of the base and between the water pump cover and the clutch cover.

I have attached a pic of it.

Hope this helps.
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'Biker' Bill
'97 EN500LTD 'Hidalgo'
168,000+ miles so far
VROC #3833
IronButt #6024
Levelland, TX

SlipStreamer Enterprise II, Vista Cruise,
Fiamm air horns, Cobra Spots, Drifter solo seat,
Pro-Tac backrest, 17/42 sprockets, Darkside rear,
ScottOiler, F&S luggage rack ,Throttle Rocker,
Viking bags, Victory Vegas handlebars,
Kuryakyn grips, LED & HID lighting,
4-gal AUX fuel tank

http://bikerbillsvulcan500rebuild.shutterfly.com/
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Old 05-02-2013, 10:11 PM   #5
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Bill: Thanks for the pic. Water would have to run uphill for the coolant to get from that weep hole to the bolt I mentioned. When bike is parked (on a wheel chock to keep it vertical), the bottom of the rear wheel is about two inches above the bottom of the front wheel. When I get time, going to run the bike "in place", and track down the leak source. Probably something simple up above the engine and I just am not seeing it. Will post back when I find it.
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