well here's a strange one fellows. motor turns over in high gear, but when pulled back to neutral there is a light grinding noise in the trans. more like a thunk. All new and refurbished parts, watts clutch, all adjustments made etc. Sounds like a gear engaged partially or could it be in the clutch pack? maybe one of the discs or all are stuck?
any thoughts appreciated.
Quite possibly the triple-gears. Had one that ran beautifully save for the vexing noise.
Is this when it is running?
no we are just turning over a fresh rebuild with the hand crank. noise appears at the rear of the trans not in the triple gears.
Was everything oiled when assembled? Could it be the one of the bands just a little tight, just enough so one of them is grabbing a drum just enough to cause it to hang up then release. Did you pore oil over the band area, does the engine have oil in it? What year engine? How were the lugs in the brake drum? Were the Watt's clutch disk in the engine before or new? Are the Watt's disk correct for your year? IE; you can use the 26-27 style in an earlier setup but you can't use the 25 and earlier in a 26-27 brake drum.
everything oiled / all new lugs/27 block and trans/ new parts throughout. my thought is similar to what you suggest as to a band grabbing. but they have all been backed off fully next up is to remove the bands and see. on another thought I measured the clutch pack height to match a stock set up but was only able to get two of the thrust washers installed rather than the three recommended.
Clutch pack thickness and thrust washer allowance are two different things.
Posted by RV Anderson on Dec 3, 2014;
On later drums (1916-1927) Install thin Watts disk first, then 2 steel disks with inside notches, then a thick watts disk, then 2 more "small" steel disks, until you have installed all 8 "small" style steel disks and all 5 Watts disks.
Note: Some later (1925-1927) drums MAY require the first Watts disk to have its corners filed to allow the disk to go all the way through to the surface of the drum.
The thrust (I would have to grab my book for the number) is the amount of play/end movement of the drums on the main shaft and the locked on clutch drum. This is set before the disks are installed. If it's too little, cuts down on the amount of lube that gets into the main shaft at the clutch end. I like to err on the side of a little more gap for thrust, having seen the results of too little.
When you adjust the clutch use a 13/16" lug nut as a go / no - go gauge. Check next to each clutch finger. Adjust so the nut just barely slides in each position. Then you will have a good even push on the clutch plates.
Whenever the transmission is in either neutral, low or reverse the triple gears are turning as well as the drums. It is normal for it to make a little noise when in neutral. But if it is excessivly noisy, I would say, the gears don't mesh very well. It might quiet down after some use, or it might get noisier? Time will tell.
thanks for all the input and possibilities. found it!seems that the clutch release bolts are a tad long and were hitting the hogs head when the clutch was placed in neutral! That is the pressure released from the clutch pack allowed the clutch plate and the bolts to move back just enough to hit the hogs head! am going to install the early ones that are slotted for a screw driver and we should be good to go!
(well there is always another glitch to be found eh!)
Glad it was something that can be easily fixed.
I didn't realize that later clutch adjusting screws were different, can someone enlighten us?
At this point I am A; glad he found the problem
but B; not sure what the heck he is talking about re clutch release bolts. Except for the slotted headless screws for clutch finger adjusters(1909 to 1927) and the cap screws for holding the drive plate to drum there are no bolts in there. ??
Allan, Are you writing about the three slotted adjustment screws shown in Royce's picture That is the ones which adjust the spring tension and have the slots for cotter pins? Or are these something else? Check for endplay in the crankshaft. The transmission should not move front to back when you use the clutch. If it does, you have severe crankshaft end play.
There is some back and forth movement of the drums on the main shaft. You have some between the locked on clutch drum and brake drum, your thrust gap/space. It's a new engine.