GL1500 Scavenge Pump


Information and questions on GL1500 Goldwings (1988-2000)
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ddmme
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Joined: Tue Nov 10, 2020 2:41 pm
Location: Alabama
Motorcycle: 1999 GL1500

GL1500 Scavenge Pump

Post by ddmme »



I have a scavenge pump from supposedly a 1995-2003 GL1500. See attached picture. I want to use this pump to scavenge oil from the turbocharger on my car. I will make a shaft and mount for it. I am hoping someone can tell me the direction of rotation (or which is the input or output port) and the max pump rpm. Any help is appreciated. Thanks.
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WingAdmin
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1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
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Re: GL1500 Scavenge Pump

Post by WingAdmin »

You can actually run it in either direction if you really want to, it will reverse flow if you do.

The design is for the pickup to be the thicker tube with the grommet on it, and the output the thinner tube.

If you look at from the rear as it is installed on the GL1500, the thinner tube is on the left, pointing up, and the thicker tube is on the right, pointing right:

Scavenge pump
Scavenge pump

Looking at it in this picture, it rotates counter-clockwise.

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WingAdmin
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Posts: 21522
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: GL1500 Scavenge Pump

Post by WingAdmin »

Oh, and the pump is driven from a chain from the main output gear, with a 31:24 (1.29) ratio. The rev limiter kicks in at 6,000 RPM on the GL1500, so theoretically the maximum design speed for this pump would be 7,740 RPM.

ddmme
Posts: 5
Joined: Tue Nov 10, 2020 2:41 pm
Location: Alabama
Motorcycle: 1999 GL1500

Re: GL1500 Scavenge Pump

Post by ddmme »

You are the holy grail. That is exactly the info I was looking for. Any idea on the flow rate of the pump? You seem to be privy to the hard numbers.

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WingAdmin
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Posts: 21522
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: GL1500 Scavenge Pump

Post by WingAdmin »

ddmme wrote:
Tue Nov 10, 2020 11:00 pm
You are the holy grail. That is exactly the info I was looking for. Any idea on the flow rate of the pump? You seem to be privy to the hard numbers.
No clue, I don't think it's published anywhere. There's probably math somewhere that could be used to calculate it? But I'd probably just run it and measure to see what I got.

ddmme
Posts: 5
Joined: Tue Nov 10, 2020 2:41 pm
Location: Alabama
Motorcycle: 1999 GL1500

Re: GL1500 Scavenge Pump

Post by ddmme »

That was my plan. I thought it wouldn't hurt to ask however. If the flow rate was too low, I wasn't going to bother testing it and would call it a loss. Thank you for your knowledge and quick responses. I thought I may be waiting a few weeks for someone to come along with that kind of detailed info.

ddmme
Posts: 5
Joined: Tue Nov 10, 2020 2:41 pm
Location: Alabama
Motorcycle: 1999 GL1500

Re: GL1500 Scavenge Pump

Post by ddmme »

Is the pump doweled to the case anywhere or does it just float on the shaft until it is tightened down?

ddmme
Posts: 5
Joined: Tue Nov 10, 2020 2:41 pm
Location: Alabama
Motorcycle: 1999 GL1500

Re: GL1500 Scavenge Pump

Post by ddmme »

WingAdmin wrote:
Tue Nov 10, 2020 8:33 pm
You can actually run it in either direction if you really want to, it will reverse flow if you do.

The design is for the pickup to be the thicker tube with the grommet on it, and the output the thinner tube.

If you look at from the rear as it is installed on the GL1500, the thinner tube is on the left, pointing up, and the thicker tube is on the right, pointing right:

Scavenge Pump.GIF

Looking at it in this picture, it rotates counter-clockwise.
While playing with the pump, I noticed there are oil channels that feed oil to the bore on each side where the shaft passes through. Those channels are on the pressure side. Running the pump backwards may affect the lubrication of the shaft.

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WingAdmin
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Posts: 21522
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: GL1500 Scavenge Pump

Post by WingAdmin »

ddmme wrote:
Wed Nov 11, 2020 1:27 pm
Is the pump doweled to the case anywhere or does it just float on the shaft until it is tightened down?
It is doweled. Let me see if I can find a picture...

Pump mounting to case
Pump mounting to case




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