02 ZR600 power valve help - Snowmobile Forum: Your #1 Snowmobile Forum
http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum > Specific Snowmobile Forums > Arctic Cat Snowmobiles


» Sponsors





Reply
 
LinkBack Thread Tools Display Modes
Old 12-27-2012, 11:13 PM   #1 (permalink)
Registered User
 
Join Date: Feb 2011
Location: Maine
Posts: 71
02 ZR600 power valve help

My 02 ZR600 power valve servo seems to retract to far back upon closing on occasion which causes the cables to slacken where they wrap around the spool and the first one wants to come out. When I bought the sled the cables were disconnected. When running it with the back end in the air all works properly. I am curious what may cause my issue. I rebuilt the top end with new cylinders last spring and checked cable adjustments and they were right on.

I appreciate any ideas.
pscm is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-28-2012, 06:09 AM   #2 (permalink)
Super Moderator
 
kccats's Avatar
 
Join Date: Dec 2006
Location: Northern IL
Posts: 19,445
I don't believe the spool can go too far? Perhaps the cables were too tight?
kccats is offline   Reply With Quote
Old 12-28-2012, 12:37 PM   #3 (permalink)
Registered User
 
smokingcrater's Avatar
 
Join Date: Jan 2010
Location: North Dakota
Posts: 1,072
something is adjusted wrong... kccats is correct, there shouldn't be so much cable that it can go back that far. I know when I work on mine the first thing I do is manually pull them up by turning the spool by hand until the cable is tight.
__________________
1) 2004 Yamaha Warrior
2) 2006 Yamaha Nytro
smokingcrater is offline   Reply With Quote
Old 12-28-2012, 08:36 PM   #4 (permalink)
Registered User
 
Join Date: Feb 2011
Location: Maine
Posts: 71
Ok, I am not an expert or I wouldn't be asking for help. I assure you the servo is going back further than it should. I put a mark on the housing and the spool in the retracted position. I then ran the engine with the back up to verify proper rpm engagement and that the servo returns to normal. All was well. Seems to do this only occasionally.
pscm is offline   Reply With Quote
Old 12-29-2012, 06:44 AM   #5 (permalink)
Super Moderator
 
kccats's Avatar
 
Join Date: Dec 2006
Location: Northern IL
Posts: 19,445
I apmit I've seen several different adjustment numbers, but if you adjust them equal and 'Loose' the motor should just turn just so far?
Personally I have the Supreem Tool Vac operated valves on my Big Cats, and my ZR has the BM Invader vac valves(DOO style!)
kccats is offline   Reply With Quote
Old 01-01-2013, 08:22 PM   #6 (permalink)
Registered User
 
Join Date: Feb 2011
Location: Maine
Posts: 71
So I tested the servo motor resistance per the manual and also fed voltage in both directions. I think the resistance is flakey as I can get an intemittant open at lower readings though I am not popping any codes. Any way I did modify the pulley and installed my own retainer to stop the cables from coming loose and causing additional issues that are avoidable from a less than desirable design. This at least will stop potential cable damage. I need to get it back in the air and run some tests. Could have a sticky valve though this is fresh top end and I spent a lot of time on the valves to make sure I had no issues.
pscm is offline   Reply With Quote
Old 01-02-2013, 04:31 AM   #7 (permalink)
Super Moderator
 
kccats's Avatar
 
Join Date: Dec 2006
Location: Northern IL
Posts: 19,445
I agree less than a perfect set up! But be carefull of dropping a valve into the piston!
kccats is offline   Reply With Quote
Old 01-02-2013, 11:09 AM   #8 (permalink)
Registered User
 
Join Date: Feb 2011
Location: Maine
Posts: 71
If put together correctly you cannot drop the valves in to far as the valve stopper limits this travel. The one thing they did do correctly with this system is not make the cables the limiting factor for interference or they would have a lot of issues. The cables are adjusted per the manual. I did just as smoking crater stated to ensure the cable lengths are correct.
pscm is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 08:28 PM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0