Blue Rhino TM72 - Manual (Page 146)

MAINTENANCE
TM60/72/84/100 02/11 Maintenance Section 5-6
© 2011 Alamo Group Inc.
MAINTENANCE
BLADE SHARPENING
Always sharpen both cutting edges of each blade at the same time, the same amount, to maintain balance.
Follow original sharpening pattern as shown. Do not sharpen blade to a razor edge, but leave a 1/32" blunt
edge. Do not sharpen back side of blade. Mnt-R-0303.
IMPORTANT: When sharpening blades, grind each blade the same amount to maintain balance. The
difference in blade weights should not exceed 1 ounce. Unbalanced blades will cause excessive vibration
which can damage gear box bearings. Vibration may also cause structural cracks in cutter housing.
Never work under equipment supported by a hydraulic device because it may drop if the
control is actuated (even with the engine stopped) or in the event of hose failure, etc. Always
use a secure support for equipment which must be serviced while in the raised position.
NOTE: Replace Blades in pairs after no more than 1/2" notch wear!
BLADE REMOVAL
Hold the end of blade using heavy leather gloves and remove left hand threaded bolt.
Avoid personal injury. Blade and/or blade carrier removal should be done only with the
tractor engine shut off, key removed, in neutral, parking brake on, PTO disengaged, and the
cutter blocked in the raised position.
BLADE INSTALLATION
Install washer on blade bolt, insert bolt into blade. Thread bolt into spindle shaft. NOTE: Blade bolt has left
hand threads. Tighten blade bolt to 100 ft. lbs. torque. Use heavy leather gloves during tightening process to
hold blade and wrench.
BELT ADJUSTMENT PROCEDURE
Drive belt on this mower is spring loaded and non adjustable. As belt wears belt remains at proper tension.