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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
853 gear reduction mayhem
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<blockquote data-quote="Old_853" data-source="post: 134991" data-attributes="member: 24634"><p>New seals carefully installed. The old ones looked perfect. No nicks, gouges, or bends. I used a length of 3.5" exhaust tubing and an old seal to make a driver. Used loctite 518 around the outside of the seal just in case it was getting past there. Used silicone grease on the contact surface of the seal and shaft. Let it dry overnight. Installed motors and put just two gallons of hydraulic fluid in and let it sit. No change in the chaincase level. Topped it off and let it idle for 30 minutes. All looked well. Went for a test drive for 300 yards or so, and went back to the shop. No hydraulic fluid in reservoir. Crap. Pull chaincase drainplug again and there is at least 5 gallons extra fluid in the chaincase.</p><p></p><p>I test fit the seals on a spare shaft I have. They fit very tightly on the shaft. Nominal OD of the shaft is 2.5". Granted these have several thousand hours on them and the shafts are slightly worn where the seal rides. Less than the thickness of a fingernail. Maybe a seal saver sleeve thing? New shafts would be very difficult to make even for a seasoned machinist. It ain't worth making new ones.</p><p></p><p>EDIT: Looking closer at the manual I noticed I may have installed them backwards. Or the manual guys did. Either way it would ride on a "new" area of the shaft, because they were installed rubber in when I took them apart. Hmm.</p><p></p><p></p><p></p><p>[ATTACH=full]6680[/ATTACH]</p></blockquote><p></p>
[QUOTE="Old_853, post: 134991, member: 24634"] New seals carefully installed. The old ones looked perfect. No nicks, gouges, or bends. I used a length of 3.5" exhaust tubing and an old seal to make a driver. Used loctite 518 around the outside of the seal just in case it was getting past there. Used silicone grease on the contact surface of the seal and shaft. Let it dry overnight. Installed motors and put just two gallons of hydraulic fluid in and let it sit. No change in the chaincase level. Topped it off and let it idle for 30 minutes. All looked well. Went for a test drive for 300 yards or so, and went back to the shop. No hydraulic fluid in reservoir. Crap. Pull chaincase drainplug again and there is at least 5 gallons extra fluid in the chaincase. I test fit the seals on a spare shaft I have. They fit very tightly on the shaft. Nominal OD of the shaft is 2.5". Granted these have several thousand hours on them and the shafts are slightly worn where the seal rides. Less than the thickness of a fingernail. Maybe a seal saver sleeve thing? New shafts would be very difficult to make even for a seasoned machinist. It ain't worth making new ones. EDIT: Looking closer at the manual I noticed I may have installed them backwards. Or the manual guys did. Either way it would ride on a "new" area of the shaft, because they were installed rubber in when I took them apart. Hmm. [ATTACH type="full" alt="1714255837354.png"]6680[/ATTACH] [/QUOTE]
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853 gear reduction mayhem
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