Steve Jonker 8 #1 Posted November 12 I have a L156 with a RM117 deck that I have restored. When I engage the deck it sounds like the blades are ticking each other even though they are timed at 90° apart. The gap between the blade drive gears seems to be larger than needed. I am thinking the gears are slapping making the noise. Is there a specification for the gear gap? If so, there doesn't seem to be any adjustment other than maybe putting some spacer washers on the shaft. Any feedback would be much appreciated! Share this post Link to post Share on other sites
pfrederi 17,743 #3 Posted November 12 Beautiful restoration. The gears do wear but I am not aware of any spec for gap. 1 Share this post Link to post Share on other sites
Handy Don 12,282 #4 Posted November 12 13 hours ago, Steve Jonker said: I have a L156 with a RM117 deck that I have restored. When I engage the deck it sounds like the blades are ticking each other even though they are timed at 90° apart. The gap between the blade drive gears seems to be larger than needed. I am thinking the gears are slapping making the noise. Is there a specification for the gear gap? If so, there doesn't seem to be any adjustment other than maybe putting some spacer washers on the shaft. Any feedback would be much appreciated! I have restored a ’68 gear deck for use on my 854. As you’ve discovered, there was no provision for adjusting gear lash nor any spec that I’ve seen. After my first assembly/test runs, I felt there was too much lash and that ultimately, something would break or wear prematurely. I can tell you that unless the blades have broken out of the roll pins that hold them aligned on their shafts or the gears have slipped teeth, there is no way they are touching each other--that noise is umistakeable! My ultimate solution was to put shim washers on the cross-shaft to move the face gears closer to the bevel gears and take out lash. The shims go between one of the face gears and the shoulder of the cross shaft that retains the gear (remember, that you can adjust the shaft horizontally by sliding it through the inner races of the bearings so shims can be on only one side). I bought a small set of shims and it took two tries to get the right amount so there is some lash to allow for heat expansion of the parts and for grease flow but the gear clatter/ticking has fully ceased. If memory serves, I left around .020 - .025" end-to-end shaft movement. 3 Share this post Link to post Share on other sites
Steve Jonker 8 #5 Posted November 12 This makes great sense. Thanks for the very thorough answer! 1 Share this post Link to post Share on other sites
