Bleeding Hydraulic Valves

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coffee_brake
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Bleeding Hydraulic Valves

#1 Unread post by coffee_brake »

The '92 Nighthawk that I am re-assembling has hydraulic valves and the Clymers says I must bleed them before reinstalling them. Says there's a special tool that will force kerosene into the tappet.

Why? Do I need the special tool? Is there a way around it? Is there a generic tool or a homemade setup?
Jenn S.
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2005 Concours
2001 Vmax
1992 CB750

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#2 Unread post by Wrider »

The kerosene is to completely clean them out and flush the old oil out of them.

Not sure why you'd need a special tool on it though. If they're like the others I've seen you can just submerge them in a bath of kerosene and pump them until they're clean, then to the same in oil and reinstall them.
Have owned - 2001 Suzuki Volusia
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coffee_brake
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#3 Unread post by coffee_brake »

Pump them with what? What device do I use to pump the old oil from the tappets?
Jenn S.
AMA #658162
2005 Concours
2001 Vmax
1992 CB750

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#4 Unread post by Johnj »

I've used a set of channel-lock pliers.
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#5 Unread post by Wrider »

Just pump them by hand by collapsing them and expanding them repeatedly until there's no air or old oil left in them.
Have owned - 2001 Suzuki Volusia
Current bike - 2005 Kawasaki Z750S
MMI Graduation date January 9th, 2009. Factory Certifications in Suzuki and Yamaha

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#6 Unread post by coffee_brake »

OK, I didn't even know there was a moving part in that little...thing. I can do this!...I hope.
Jenn S.
AMA #658162
2005 Concours
2001 Vmax
1992 CB750

Wrider
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#7 Unread post by Wrider »

you can do it! We've got confidence in you!
Cof-fee Brake!
Cof-fee Brake!
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Cof-fee Brake!
Cof-fee Brake!
:laughing:
Have owned - 2001 Suzuki Volusia
Current bike - 2005 Kawasaki Z750S
MMI Graduation date January 9th, 2009. Factory Certifications in Suzuki and Yamaha

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coffee_brake
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#8 Unread post by coffee_brake »

:bag:
Jenn S.
AMA #658162
2005 Concours
2001 Vmax
1992 CB750

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