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Old 04-06-2016, 16:25   #1
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GROCO HF TOILET LEAKING

Hello,

My Groco HF Manual Toilet is leaking from the hand pump piston..I believe there is a rubber seal that needs to be replaced but am not sure how to get to it. Do I need to take the entire pump apart in order to replace this?
If anyone has any experience with this it would be great to have some advice before I give it a go?

Thanks in advance!
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Old 04-06-2016, 19:28   #2
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Re: GROCO HF TOILET LEAKING

Step 1. Call Groco tech support 410-604-3800. Ask for Patrick...he'll tell you what you need and how to do it.

Step 2. Follow his instructions to the letter.
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Old 04-06-2016, 20:32   #3
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Re: GROCO HF TOILET LEAKING

The seal is pretty easy to change. Unscrew the pump knob. Below that you'll find a rubber washer that acts as a bumper. Remove that as well. At this point you may be able to dig the old seal out with an ice pick or other pointy object. If that works, grease the piston rod (silicone grease) and slide the new seal down and press it into place. Slide the rubber washer onto the shaft, screw the knob back on and you're done.

If you can't dig the old seal out with the piston rod in place you'll need to remove the cylinder from the base and slide the piston and rod out. If you do that you might as well put a full kit in.

Go to Groco.net, click on Service Manuals and with a little looking you'll find a nice exploded drawing of the toilet and also detailed, slightly confusing, rebuild directions.

If you get stuck, take Peggie's advice and call Groco. They have a reputation for good customer service.
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Old 05-06-2016, 03:42   #4
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Re: GROCO HF TOILET LEAKING

Thanks guys, Hopcar, can you please elaborate on how the 'knob' is removed from the piston. Mine is actually a handle, I suppose it screws off anti clockwise, but how do I counter the force? Should I grip the stainless piston rod with some vice grips and rubber? I think this will be difficult to get off? What's your thought?
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Old 05-06-2016, 06:03   #5
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Re: GROCO HF TOILET LEAKING

You obviously know not to damage the rod where it will go through the seal. If your pliers and rubber trick won't work, you'll need to remove the pump from the base. It's been a long time since I took one of these apart, but I think there is a hex molded into the bottom of the piston that you can get a socket onto. If I'm wrong about that, it's time to call Groco.
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Old 05-06-2016, 08:11   #6
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Re: GROCO HF TOILET LEAKING

HopCar has it right, my friend... I just fixed this exact problem on a friend's Hunter 29. Easy Peasy but keep Groco's number handy in case you run into unexpected difficulty.
One of the many reasons I am happily no longer a boat owner! Phil
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Old 05-06-2016, 18:47   #7
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Re: GROCO HF TOILET LEAKING

Have you looked at the manual and diagram online? You can see it here with a very good blowup of how the pump is laid out. http://www.groco.net/SVC-MAN-07/Sec1/pdfs/HF.pdf

I have only replaced the seal (part #3 in the diagram) when overhauling the head so I removed the shaft from the pump and replaced it before reinstalling the shaft. However it seems from the diagram that the handle on the end of the shaft should remove so you can replace that seal without disassembling the entire pump.
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Old 10-06-2017, 19:03   #8
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Re: GROCO HF TOILET LEAKING

Seems the links in this thread keep getting 404 errors. I thought I might upload what I could find that were not copyrighted. For those that are copyrighted I will find and post what I can:
https://www.groco.net/media/file/file/h/f/hf-series.pdf

Hope this helps.
Attached Files
File Type: pdf toilet_trouble_shooting_guide.pdf (9.7 KB, 6 views)
File Type: pdf hf-series.pdf (102.0 KB, 6 views)
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Old 11-06-2017, 12:56   #9
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Re: GROCO HF TOILET LEAKING

Model HF: Pump Rebuild Instructions
Attached Files
File Type: pdf HF-Series_Rebuild_Instructions.pdf (104.2 KB, 2 views)
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Old 11-06-2017, 19:33   #10
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Re: GROCO HF TOILET LEAKING

Take all above under advisement, then take Peggie's advice, call Patrick at Groco.
As he will make all things large and small easier.
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