The last 10 days have been challenging but also interesting.
I got my new engine for the 1655. It was in a previous life a Linmar LX 790 but time and neglect resulted in a broken rod. Its been rebuilt to mirror a B series engine including the correct starter, points and condensor. It still has the 20HP carb and cam so as the builder told me I have a B series 20HP engine.
It runs sweet with about 20-24PSI on the oil pressure guage. Per Mr Daniel ( the keeper of all knowledge on Masseys) said an oil pressure guage is a must to monitor the health of a Onan. So i took his advice and added a 40PSI mechanical guage.
Now to my challenges and I have 4 of them
First the electric clutch. It is the old style that does not have springs for setting the air gap. Its mounted to the engine block with 4 #10 machine screws. Occasionaly when its engaged the ammeter will go from 2-4 mps of charge to a solid discharge of 10 Amps. That discharge rate may last a second or as much as 3 seconds. Is this a clutch issue or is it something else I should be looking at. I do know that I have a voltage reguolator issue. A new one from Car Quest will not produce a positive charge when the clutch is engaged and the headlights are on. A new voltage regulator is on the way. But I think this must be a clutch issue as the current drawn by the clutch is offset by the alternator for the most part except those moments when it decides to draw a ton of current.
Second challenge: The double sheave pulley on the PTO Shaft. My electric clutch is the 5&1/2 inch dbl sheave variation, and the dbl pulley on the PTO shaft is 5&1/2 inch. Here is the issue. One sheave on the PTO pulley is a true 1/2 inch wide and the 41 inch belt rides nicely in the sheave. The second sheave appears to be narrower and the 1/2 inch wide belt rides high in the sheave and throws the belt off. It appears the second sheave is closer to 3/8 inch. Has anyone seen this before? And what are the fixes?
I have a JD 400 dbl sheave pully but it has a lager diameter and the 2 sheaves are wider apart than the clutch sheaves. So the belts would not align and the mower and snow blower would turn slower.
Third challenge; Belt adjuster on the flywheel end. I am using a Gates A belt 23 inches in length. The manual says to compress the spring to 1.25 inches. I cannot compress it less than a 1&1/2 inches. The steel tube ferrule appears to be to long as I keep backing off the top nut and tighten (compressing the spring) the bottom nut. The belts are tight and no slippage.
Should I cut the ferrule shorter to allow more room to tighten the nut and compress the spring more, or leave it alone since the belts are tight?
Fourth Challenge and the biggest of all. This tractor had a sunstrand transmission. The one that was in it had a great input shaft but was sloppy loose. Meaning that when left running at a stop it had serious creep and the pedal never returned to nuetral when you let go of it. I had a second Sunstrand that had a horribly battered input shaft but when I did have it in the tractor the pedal always returned to nuetral and was a strong performing transmission.
So I took the good input shaft from the slopppy loose unit and put it in the good transmission. I did find a seal and gasket kit locally and replaced the O Ring behind the charge pump and the 2 orings on the motor side of the center section and the gaskets.
I have 5 qts of oil in the unit and now here is the rub
At an idle the mid hydraulic lift cylinder just barely lifts the snow blower. ( Yes I have the helper springs attached) at a fast throttle setting it lifts just fine. When taking it for a drive The tractor starts forward a good clip and then starts slowing down. When going up a small incline on the street the tractor continues forward but it gets slower than a snails pace. Why is this happening? Coming diown the hill the tractor just zips right along
In reverse there does not appear to be any reduction of avalable speed. I do have full pedal travel so I dont think its a binding issue or adjustment issue.
Group thought? and on the tranny I am open to all suggestions and No i do not have any hydraulic pressure guages.
Thanks for allowing me to cry my woes