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Jeremy, you didn't give the year of your "H".. The early [1939] are different than the later [40 & up].. ~First you are going to have to use a mechanics stethoscope, or long bar, or long piece of hose & listen to the different areas on your tractor to determine exactly where the noise is coming from.. ~Your hydraulic pump could easily be the noise producer [that pump turns all the time].. It could also be excessively worm cam to governor gears [common on the early H’s],, or the L/H cam gear needs to be adjusted up tighter [later H’s],, or elliptical wear on the governor or cam gear [somewhat common problem].. Or even a loose L/H cam gear [somewhat common on the H’s].. ~It could also be your governor to fan shaft gears still making a noise.. Just adjusting [shimming] those gears won’t remove most howling noises until the gear set is run for quite a while to re-seat in to each other.. If you didn’t use a stone or fine grinder & remove the tooth end wear flash they might never quiet down.. ~You can pull the fan shaft back out & run that tractor without the fan shaft in it & see if the noise goes away.. If that removes the noise remove the gear tooth end wear [sharp flashing] on both fan drive & driven gears with a stone, set then set the heels [backs] of the gears to be exactly even, & set the gear backlash [fan blade tip movement]to be about 3/8”-1/2”.. ~If that pump is dry it must have oil in it or you can just remove the pump & install the later governor cover with the long snout on it [be sure to re-set the governor to fan gear backlash [fan blade tip movement].. ~If the noise is definitely coming from the fan gears & you are sure you set them up correctly & the tooth end flashing isn’t excessive you can try just operating the tractor for a few hours to see if the noise decreases after some break-in time.. It’s normal for those fan gears to howl a little if their adjustment is disturbed.. ~If you can be more specific on exactly what’s causing the noise we can be much more helpful on how to eliminate the noise. Any questions just post back or E-Mail… JDClooney@aol.com
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