Timber Tuff Tools TMG-243PT - Pto Shaft Clutch Run-In

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Typical vernier calliper
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6. Tighten all 8 nuts until the proper spring height dimension values are achieved per the “PTO
Shaft Clutch Spring Height vs. Horsepower” table for your PTO output horsepower. It is
recommended that a calliper (either digital, dial, or vernier—similar to the one shown below)
be used to accurately verify the spring height measurements. After setting all 8 spring
heights, the clutch is now ready for use.
PTO Shaft Clutch Spring Height vs. Horsepower
PTO Shaft Clutch Flange Dia PTO hp Spring Height
5S.FF2
7-⅝” (200 mm)
20 hp
1.26” (31.9 mm)
25 hp
1.25” (31.7 mm)
30 hp
1.24” (31.4 mm)
35 hp
1.22” (31.1 mm)
45 hp
1.20” (30.5 mm)
All ratings are at 540 rpm PTO speed
7. The clutch should be checked during the first hour of use and periodically each week
thereafter. Excessive clutch plate slippage, burning odor, or visible smoking should not be
observed during use.