Installing seal in tach drive

Patton
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17 Nov 2012 16:12 #558813 by Patton

Installing seal in tach drive was created by Patton

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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MFolks
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17 Nov 2012 16:26 #558816 by MFolks

Replied by MFolks on topic Installing seal in tach drive

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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650ed
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17 Nov 2012 16:50 #558818 by 650ed

Replied by 650ed on topic Installing seal in tach drive

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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4TheKZ1000
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17 Nov 2012 16:58 - 17 Nov 2012 16:58 #558819 by 4TheKZ1000

Replied by 4TheKZ1000 on topic Installing seal in tach drive

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:

Last edit: 17 Nov 2012 16:58 by 4TheKZ1000.

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650ed
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17 Nov 2012 19:29 #558838 by 650ed

Replied by 650ed on topic Installing seal in tach drive

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.

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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4TheKZ1000
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17 Nov 2012 20:58 #558853 by 4TheKZ1000

Replied by 4TheKZ1000 on topic Installing seal in tach drive

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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KZJOE900
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17 Nov 2012 21:06 #558858 by KZJOE900

Replied by KZJOE900 on topic Installing seal in tach drive

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
Past:
86 FJ1200
74 Z1900
72 CB450

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DesertKZ
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17 Nov 2012 21:30 #558861 by DesertKZ

Replied by DesertKZ on topic Installing seal in tach drive

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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Garn
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19 Nov 2012 05:05 - 19 Nov 2012 05:08 #559091 by Garn

Replied by Garn on topic Installing seal in tach drive

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
1 x 73 Yamaha TX500 & 98 fzx250 Zeal
Sydney Australia

Last edit: 19 Nov 2012 05:08 by Garn.

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undiablo
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19 Nov 2012 11:35 #559115 by undiablo

Replied by undiablo on topic Installing seal in tach drive

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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yorkshirekid
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28 Sep 2021 22:47 - 29 Sep 2021 14:44 #855894 by yorkshirekid

Replied by yorkshirekid on topic Installing seal in tach drive

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