I’ve been experiencing general steering issues which at least were due in part to the belt slipping on my RM SPX-5 wheel pilot. I did a lot of research and didn’t find a whole lot of help online. I finally watched a series of YouTube videos about the ST4000 model which shows that the internal screw posts/shafts break very easily. https://www.youtube.com/watch?v=QhiowFXK6EU
After watching it, I decided to inspect my wheel drive unit. The SP-X on had 2 of these screw shafts. Looking at the attached pictures, they are located a locations B and D. After opening mine up, indeed the E shaft was broke in 3 pieces. These were easily put back together using gorilla glue.
I realized that 2 things. 1) When the engage lever (A) is set either in the engaged or disengaged position, the handle rises slightly to sit over a molded knob (the engaged one can been seen just above the “A” line’s arrow (when looking at the picture with the lever). When the levers edge rises above the raised area, causes the entire internal mechanism to be raised. Since the B screw is at the end of what becomes a lever, there has been enough stress over time that caused the post to break. 2) The “A” bolt used to look like E. As the lever raised the mechanism, it caused the E nylon to slip under the metal plate. Which cause the belt tensioner to become erratic.
I ended up coming up with the same fix as was presented on the video for B and I replaced the A screw which used to look like the “E” screw. With A not secured the metal plate is held in place and no longer allows E to slip out and now the with stronger through bolt B, the post will no longer be compromised. In addition the B bolt, helps keep the entire plate stable. The B bolt used to look like D.
All bolts are SS 5mm. Hope this helps someone. I'll be testing it this weekend.
Have a great/safe 4th!
-Jon
After watching it, I decided to inspect my wheel drive unit. The SP-X on had 2 of these screw shafts. Looking at the attached pictures, they are located a locations B and D. After opening mine up, indeed the E shaft was broke in 3 pieces. These were easily put back together using gorilla glue.
I realized that 2 things. 1) When the engage lever (A) is set either in the engaged or disengaged position, the handle rises slightly to sit over a molded knob (the engaged one can been seen just above the “A” line’s arrow (when looking at the picture with the lever). When the levers edge rises above the raised area, causes the entire internal mechanism to be raised. Since the B screw is at the end of what becomes a lever, there has been enough stress over time that caused the post to break. 2) The “A” bolt used to look like E. As the lever raised the mechanism, it caused the E nylon to slip under the metal plate. Which cause the belt tensioner to become erratic.
I ended up coming up with the same fix as was presented on the video for B and I replaced the A screw which used to look like the “E” screw. With A not secured the metal plate is held in place and no longer allows E to slip out and now the with stronger through bolt B, the post will no longer be compromised. In addition the B bolt, helps keep the entire plate stable. The B bolt used to look like D.
All bolts are SS 5mm. Hope this helps someone. I'll be testing it this weekend.
Have a great/safe 4th!
-Jon
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