BROWN 672HD Owner's/Operator's Manual page 25

Blade sharpening procedure:
Cutter blades are manufactured from Ultra-Kor
grinder keep the grinder moving at all times. DO NOT allow the grinder to stop or rest in one spot,
because this will over heat the material and cause it to turn "blue". Blades should be sharpened in
opposing pairs. For example; Sharpen the bevel up blades, which are directly across from each
other, then the bevel down blades (tree cutter).
Take care to remove equal amounts of material from each blade, failure to do so will cause destruc-
tive vibration to the cutter and tractor. Opposing pair blades must be kept within 1/10th of a pound
of each other to prevent vibration damage.
Tip: The first 1" to 1 ½" of the blade tip is where all of the cutting action takes place.
NOTE: Failure to keep the blades sharp will cause multiple problems,
including:
1. Slip clutch failure.
2. Extreme blade bolt wear
3. Blade bar fatigue, cracking and total failure
4. Blade fatigue, cracking and total failure
5. Deck fatigue and cracking
6. Increased amount of discharge or debris
7. Poor cut – increased amount of uncut material
Food for Thought: If your blade was an axe head, would you try to cut a tree with it?
Adjusting the Torque Setting of the Slip Clutch
To re-set the clutch to 1800 Nm, the gap between the Belleville springs (p/n's 236-0642) and the drive plate should be
approximately 6.0-mm. If a higher torque setting is needed, then tighten each bolt a 1/6 of a turn. One revolution of the
nut will compress the spring 1.75 mm. Do not set the gap
smaller than 5.0-mm. Measurements are approximate since
variations in spring force and friction materials may cause
some differences in torque values. The clutch can be adjusted
with two 19-mm wrenches.
Maintenance
Sharpening Blades
Steel. When sharpening this blade using a side
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