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Message: <blockquote data-quote="wford" data-source="post: 93847" data-attributes="member: 6365"><p>First off, I want to thank you gentlemen for pointing me in the right direction, and causing me to focus on just the control linkage as the source of my problem. In summary, the problem was excessive play in the Pivot Links on both pumps, and the neutral control adjustment on the left side. It now operates very smoothly. If you want to know more about my experience, read on. The first problem I had was with the service manual for the unit. It is from a well-known third-party provider, part # CA-S-1816UNILR, and about 600 pages. Apparently, every seller of this manual (not the $160 primo manual) gets it from the same source. Although for the 1816 Uni-loader, the information is not for the 1816B. The information on the control linkage does NOT match up with my 1816B. For example, the figures in Section 6034 – Hydrostatic Controls are not for the 1816B (maybe the earlier 1816?). The bell-cranks are manufactured differently, and the adjustable links both attach in the center of the unit and not to the left sides of the pumps. You cannot align it by their instruction that the swash plate control arms and the inner arm on the bell-cranks should be straight up-and-down – not gonna happen. You want to go out to the online parts manuals, and download the correct drawings. I suspicion that the previous owner(s) may have attempted to use this information, and got it out-of-adjustment. The play in the Pivot Links was caused by securing the bolt with a lock nut but not tightening it, and using full-thread 3/16-inch bolts (called for in the parts list) that, by the nature of being threaded, are just slightly less that 3/16-inch. I got some bolts that were not full-thread, acted more like a pin, and had just enough thread to tighten the Pivot Link Yolk to the pump shaft. No more slop in the linkage at the pump! If I have any future problems with these cheap Pivot Links, I am going to replace them with the style found on my OMC 310 – a much better design. Since the control adjustment procedure in my service manual is bogus, I took a different tact. First, I eliminated the free travel in the neutral controls without regard to the bell-cranks. Next, I measured the Pivot Link arm travel from full reverse to full forward. Total travel was just 1-inch, and I noted that pump neutral would be half the distance (1/2-inch). I adjusted the Pump Control Rods to reflect half the travel distance to be in neutral position, and secured them to the bell cranks. When I buttoned everything back up, the controls were spot-on without further adjustment, and the unit seems to be operating smoothly – better than EVER! Tomorrow is the acid test where I use the 1816B to load manure from the barns. When it works, the 1816B is so much more efficient loading than the loader tractor. Wish me luck, and THANKS again.</p></blockquote><p></p>

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