TH400 rebuild tech
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Disassemble, clean, and re-assemble using new lip seals. Pay attention to the orientation. Use the old lip seals to be sure you select the properly sized new seals. | Disassemble, clean, and re-assemble using new lip seals. Pay attention to the orientation. Use the old lip seals to be sure you select the properly sized new seals. | ||
| − | Install the piston using a lip seal installed or feeler guage, be sure the piston depressions | + | [[file:File:Center_support_rings.jpg]] |
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| + | Install the piston using a lip seal installed or feeler guage, be sure the piston depressions align with the depressions in the center support, and it helps to use a tilting motion as you install it sometimes. | ||
You can also use thin plastic (cut from a large plastic soda bottle) as a seal protector/installer or the proper Kent-Moore J-tools. | You can also use thin plastic (cut from a large plastic soda bottle) as a seal protector/installer or the proper Kent-Moore J-tools. | ||
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Solid teflon is on the left, then scarf cut teflon, then cast-iron. | Solid teflon is on the left, then scarf cut teflon, then cast-iron. | ||
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| + | [[file:Sealing_rings.jpg]] | ||
Cast iron is what most kits will contain, and what was used stock in most TH400's. | Cast iron is what most kits will contain, and what was used stock in most TH400's. | ||
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Notice I left one sealing ring off, 2nd from top groove. This groove seperates the direct (3rd gear) and reverse feeds from each other. When dual feeding the directs (as done in this build), this sealing ring is not necessary. Dual feeding the directs on a Th400 will be covered in more depth in another section. | Notice I left one sealing ring off, 2nd from top groove. This groove seperates the direct (3rd gear) and reverse feeds from each other. When dual feeding the directs (as done in this build), this sealing ring is not necessary. Dual feeding the directs on a Th400 will be covered in more depth in another section. | ||
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| + | [[file:File:Center_support_rings.jpg]] | ||
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