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Discussion Starter · #1 ·
My Sears manual had a page schematic of the G7 Hydro unit but it was so lightly printed it was illegible. Me being the wanna-be engineer, I always love to see "inside" so I emailed Hydro Gear to get the PDF document for the G7 series Hydro's (they should have this stuff posted on their web site, they could eliminate a LOT of emails). Click the link below to download the .PDF file (Requires at minimum, Adobe Acrobat Reader).

http://www.mediafire.com/?j4tvznztmmn
 

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Thanks for the schematic. I did a quick look and did not see one. Is there a filter that you can replace on these, or is it just a drain then you refill them?
 

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Discussion Starter · #3 ·
You didn't see the big automotive type filter on the side of the housing in the photos I posted, or the schematic? :) It's there.... I'm just not sure how you drain the hydro unit, I don't see a typical drain plug.
 

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Discussion Starter · #4 ·

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Thanks for the manual! Let me take a look at your pics!
 

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Discussion Starter · #6 ·
*bump*
 

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It looks like you would just unbolt the charge pump cover, to drain the oil. Same as you would do on the on the 3000 series transaxle.
 

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Discussion Starter · #8 ·
Glenn,

I agree and I suggested that in another topic but wasn't 100% sure, so I prefaced it with "If I am mistaken, please correct me".

I would remove the charge pump cover, looks easy to do, uses an O-Ring etc.
 

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It shows "4" as a plug, maybe that could drain. Fill using the breather "216".
The filter is might be the suction type. It didn't say how much oil it holds.
 

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It shows "4" as a plug, maybe that could drain. Fill using the breather "216".
The filter is might be the suction type. It didn't say how much oil it holds.
#4-plug is the oil check/fill plug. When the oil is level with the bottom of the this hole, the trans oil is at the correct level.
 
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