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http://www.bbcboards.net/showthread.php?t=20843

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http://www.bbcboards.net/showthread.php?t=21874

1. Loosen lug nuts on trailer 2. Jack up trailer and put on jack stands 3. Remove tire 4. Remove break caliper and support caliper (3/4” drive 9/16 6 side quality socket) 5. Use block of wood and hammer to remove vault cap 6. Remove cotter pin, cap, nut and washer 7. Remove hub assembly from trailer 8. Turn over hub and beat out inner bearing and seal 9. Clean hub assembly 10. Remove and replace O-ring 11. Pack inner bearing and install 12. Coat inside of seal with grease coat outside of seal with high temp silicone 13. Pack outer front bearing and install 14. Install hub, washer, nut, nut-cover, and cotter pin, tighten slightly over hand tight to set bearing than back out, then tighten finger tight the hub should turn freely with no end play (in and out movement) 15. Install zerk grease fitting on Spindle, grease and rotate hub during filling until grease starts to come out around washer and nut (usually 1 tube of grease) 16. Fill vault cap to upper retaining clip, coat outside shoulder of cap with high temp silicone 17. Use a 2x1/2 PVC slip collar (Home Depot) and b lock of wood to install cap 18. Reinstall break caliper 19. Install tire, remove jack stand and jack. open vault pictures below for filling instructions VAULT PICTURES

http://www.bbcboards.net/showthread.php?t=22074

https://www.pure-gas.org/index.jsp?stateprov=SC

https://scout.com/outdoors/bass-fishing/Article/Boat-Batteries-101-101459047