Type IV oil pump pin movement, Variation on 10 pumps |
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Type IV oil pump pin movement, Variation on 10 pumps |
bdstone914 |
Sep 30 2019, 08:23 PM
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#1
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bdstone914 Group: Members Posts: 4,673 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Notice the wide range of the depth above or below the pump surface.
I know @jakeraby pointed this out long ago but is there an easy fix or just use new pumps? These are cores that are getting reworked. Attached thumbnail(s) |
GregAmy |
Oct 1 2019, 06:37 AM
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#2
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Advanced Member Group: Members Posts: 2,385 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
How is the variation in shaft depth affecting pump performance? Are the gears still properly located regardless?
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Superhawk996 |
Oct 1 2019, 07:26 AM
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#3
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
How is the variation in shaft depth affecting pump performance? Are the gears still properly located regardless? Shaft Position doesn’t affect gear alignment much until the shaft for the idler gear disengages from the housing. At that point it goes from a double shear arrangement of the Type 4 pump (a good design) to a single shear arrangement typical of the Type 1 pump (less desirable IMHO). Single shear will allow for more deflection between the gears. At its most extreme outward movement the shaft can begin to contact the cam bolts/rivets (a very bad thing). Pinning the shaft resolves the potential for movement. |
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