Pilot bearing and bushings
(→Bushings: Minor clean up; add text; format images) |
(Minor clean up; format images) |
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====Fluted bushings==== | ====Fluted bushings==== | ||
[[File:GM pn 10125896 pilot bushing.jpg|thumb|200px|]] | [[File:GM pn 10125896 pilot bushing.jpg|thumb|200px|]] | ||
| − | The flutes reduce the load bearing capacity- even though there's not a terrific amount of load on the pilot bushing- provided the bellhousing is indexed correctly. They also present a way for contaminants to get into the bushing. | + | The flutes reduce the load bearing capacity- even though there's not a terrific amount of load on the pilot bushing- provided the bellhousing is indexed correctly. They also present a way for contaminants to get into the bushing. <br style="clear:both"/> |
==Damage caused by a pilot bushing containing iron == | ==Damage caused by a pilot bushing containing iron == | ||
{| | {| | ||
| − | |[[File:New input shaft.jpg|thumb|center|New input shaft]] | + | |[[File:New input shaft.jpg|thumb|center|250px|New input shaft]] |
| − | |[[File:Galled input shaft.jpg|thumb|center|Badly galled input shaft caused by seized pilot bushing containing a high amount of iron or steel]] | + | |[[File:Galled input shaft.jpg|thumb|center|225px|Badly galled input shaft caused by seized pilot bushing containing a high amount of iron or steel]] |
|} | |} | ||
| − | + | ||
A pilot bushing containing a good amount of iron or steel in the material's composition can and will cause this type of galling. It comes from a under lubricated, over worked condition that causes microwelding of the shaft to the bushing under extreme conditions of heat and load. Somewhere in the shaft's life, it has been used w/a iron/steel compound bronze bushing by the looks of it. | A pilot bushing containing a good amount of iron or steel in the material's composition can and will cause this type of galling. It comes from a under lubricated, over worked condition that causes microwelding of the shaft to the bushing under extreme conditions of heat and load. Somewhere in the shaft's life, it has been used w/a iron/steel compound bronze bushing by the looks of it. | ||
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It's been stated that the roller needle bearing has a Rockwell hardness of about 57 and the newer transmission's gears are rated between 61 and 63. | It's been stated that the roller needle bearing has a Rockwell hardness of about 57 and the newer transmission's gears are rated between 61 and 63. | ||
| − | + | {| | |
| + | |[[File:Lakewood pn 15977w needle element sintered pilot bush-brng.jpg|thumb|center|225px|Lakewood p/n 15977]] | ||
| + | |[[File:GMHD pn 14061685 needle brng pilot brng.jpg|thumb|center|300px|GM p/n 14061685]] | ||
| + | |[[File:GM HD pn 12577583 sealed pilot bearing.gif|thumb|center|225px|GM p/n 12577583]] | ||
| + | |} | ||
==Bellhousing alignment== | ==Bellhousing alignment== | ||
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