First round of equipment maintenance was yesterday, so I brought the cutting units to work to get them tuned up for the season.
I'm going to run solid smooth front rollers to start the season. I picked up a set from RRproducts, but before I could install them I needed to replace a snapped off lock bolt on one of the front roller brackets.
I drilled it out and used an easy out to remove the remaining part of the bolt.
Ran a tap thru the old threads and installed the new bolt.
I then began working on the rear roller section of the cutting unit. I had a broken worm gear on one side of the rear cutting unit. I removed the top cap,
Removed the old damaged gear,
And replaced it with the new one. John Deere redesigned the worm gear by making the worm gear section wider. As a result, the fit is tighter and you will need to pull out the other section of the worm gear with the 16mm head in order to fit this one in.
In the housing for the rear roller adjuster there are metal bushings. They all had play. If you grabbed the roller forward and back, you could feel the movement. They are tough to get out, but after some trial and error was able to remove all 6 and replaced them with new.
One of the rear rollers I replaced last season, but the other 2 were original to the triplex. The bearing in those 2 rollers developed play, so with the help of a bearing puller I picked up from RRproducts,
I put the puller in a vice, and pulled the 4 old bearings.
Here is a picture comparing the old bearing to the new one.
I then pressed the new bearings in, and completed the roller reconditioning with some new zerk fittings.
Here are some pics of the rollers when done. They have some surface rust on them, but the rust will be quickly removed during the first dewy mow.
After cleaning them and greasing all the fittings, I began setting them up for the season. I cleaned up the front face of the bedknife with a homemade "bedknife buddy",
Set the HOC to 7/8" to start the season,
And set the groomer assembly to 21/32"
When done I checked and all reels are easily cutting paper across all blades with minimal contact. I will use them for the first clean up mow or two before giving them a backlap.
The new rollers look so nice, too bad they won't stay looking that way forever. Here are some pics of them all done and then loaded up and ready for a new season.
Here are the grooved front rollers cleaned up and greased. I will probably switch them over at some point during the season. The reason I want to start with the smooth rollers is I have been battling triplex ring, and a grooved roller is one of a few things that will help contribute to the issue. During tighter turns with a triplex the cutting heads slide sideways against the turf as they can only pivot so much in the yoke if that makes sense. The result with a grooved roller is kind of like dragging a rake across the turf in tight turns. This is more apparent in soil conditions that are soft and when the turf growth is slower limiting recovery. The grooved rollers tend to pick up more debris in soft conditions as well and is a chore to clean after a mow.
I also did some maintenance on the power rotory scissors.
I ended up getting another set of blades, installed them, and will sharpen the old ones so they are ready when it is time to swap them out. I also greased the cutting unit and took out the flex shaft in the tube and lubed it.
