There are 2 key possible issues.
First, there is a little U joint in the linkage which can wear and cause quite a lot of issue with jumpiness. Even a little wear on this joint and it gets real touchy. This is always a possible contributing factor and you should consider replacing this joint.
Yours does sound also like the 2nd issue ... which is air or other contamination trapped in the holding valve section of the TCV. I have yet to personal encounter and service one of these, but I have read enough success stories on the subject to believe the issue.
The holding section can be bled by simply cracking open the end caps and allowing oil to bleed off the holding section. This must be done cold and it will make a mess .. you want the mower deck off both for access and cleanliness after.
If neither the joint or bleeding procedure fix this, then time to consider opening up the valve and hunting out contamination in the holding section.
Brian
First, there is a little U joint in the linkage which can wear and cause quite a lot of issue with jumpiness. Even a little wear on this joint and it gets real touchy. This is always a possible contributing factor and you should consider replacing this joint.
Yours does sound also like the 2nd issue ... which is air or other contamination trapped in the holding valve section of the TCV. I have yet to personal encounter and service one of these, but I have read enough success stories on the subject to believe the issue.
The holding section can be bled by simply cracking open the end caps and allowing oil to bleed off the holding section. This must be done cold and it will make a mess .. you want the mower deck off both for access and cleanliness after.
If neither the joint or bleeding procedure fix this, then time to consider opening up the valve and hunting out contamination in the holding section.
Brian
