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Installing seal in tach drive 17 Nov 2012 16:12 #558813

  • Patton
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When fitting a new seal into the tach drive housing, which end of the seal (small end with spring A, or large end without spring B) goes in first?



Good Fortune! :)
1973 Z1
KZ900 LTD
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Installing seal in tach drive 17 Nov 2012 16:26 #558816

  • MFolks
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I believe "B" is the correct position. Did the old seal vanish?
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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Installing seal in tach drive 17 Nov 2012 16:50 #558818

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I recall installing mine as shown in figure "A", and I think that's how it was originally installed. I may be wrong, but I am under the impression that the spring side of any seal faces the inside of the object being sealed and the smooth side faces the outside. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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Installing seal in tach drive 17 Nov 2012 16:58 #558819

  • 4TheKZ1000
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If I was to guess and I am..... :laugh:

I would think that the proper way is "B"

Im not just saying "B" to kiss Ed's azz..... :woohoo: :woohoo: :woohoo: :woohoo:

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Last edit: by 4TheKZ1000.

Installing seal in tach drive 17 Nov 2012 19:29 #558838

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Seals go in with spring side facing in / flat side facing out. This way any pressure inside the engine pushes the seal lips tighter against seat. Otherwise pressure can push oil past seal. Flat side of seals generally fit flush or slightly recessed in housing. Also make removing old seals possible by punching 2 holes in flat side and pulling seal out. Take a look at every other seal on your engine or the front forks; flat side always faces out. ;) Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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Installing seal in tach drive 17 Nov 2012 20:58 #558853

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650ed wrote: Seals go in with spring side facing in / flat side facing out. This way any pressure inside the engine pushes the seal lips tighter against seat. Otherwise pressure can push oil past seal. Flat side of seals generally fit flush or slightly recessed in housing. Also make removing old seals possible by punching 2 holes in flat side and pulling seal out. Take a look at every other seal on your engine or the front forks; flat side always faces out. ;) Ed


Sounds like Ed knows alot about Lips.....scarry..... :ohmy:

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Installing seal in tach drive 17 Nov 2012 21:06 #558858

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I'm with Ed on this one. When I changed mine was I very mindful of the orientation of the old one while taking it out. So, I'm pretty sure it was version A.
Current project 76 KZ900 (This was a Vetter model)
76 KZ900
81 XJ550H SECA (Current Project)
82 XJ550R SECA
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86 FJ1200
74 Z1900
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Installing seal in tach drive 17 Nov 2012 21:30 #558861

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Version A. Don't drive the new seal all the way in, just flush, and let the tach cable seat it.
1979 KZ1000 Shaft
1979 CX500C
1975 GT750 Smoker

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Installing seal in tach drive 19 Nov 2012 05:05 #559091

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650ed wrote: ........Take a look at every other seal on your engine or the front forks; flat side always faces out. ;) Ed


I have laboured over this some time ago, I believe its "A" in first.
The above quote of 650Ed is interesting.... I have to agree, I can't think of any seal that have the spring side showing its always the flat side out!

RegardZ.
1 x 73 Z1 (Jaffa), 74 Z1A, 76 Z900-A4
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Last edit: by Garn.

Installing seal in tach drive 19 Nov 2012 11:35 #559115

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I agree with Ed. The correct mounting position is A. ;)
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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Installing seal in tach drive 28 Sep 2021 22:47 #855894

  • yorkshirekid
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I've bought a tach seal kit for my z900 A4 and cannot fit the large sping oil seal. It just sits on top of the housing.
pic1 - shows the old oil seal before I dug it out. It is clearly inside the housing.
pic2 - shows the cleaned out housing
pic3 - shows the housing with a new seal on the outside from the kit
pic4 - seal will not go inside housing.

Anyone help me with this please - thank you
 
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Last edit: by SWest.

Installing seal in tach drive 29 Sep 2021 12:09 #855913

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Your old seal outer body is not completey removed from the tach gear housing!!!

EDIT, add a pic of the empty tach gear housing

 
 
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Last edit: by Scirocco.
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