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MAINTENANCE
SL72 03/08 Maintenance Section 5-5
© 2008 Alamo Group Inc.
MAINTENANCE
BLADE REMOVAL
To remove blades for sharpening or replacement,
remove the cover plate on deck of mower near
Hydraulic Motor. Remove lock nut from blade bolt.
NOTE: Inspect lock nut after removal and replace
if threads are damaged.
Always replace nut when replacing blade bolt.
When installing blades be sure and check blade
bolt pivot diameter for wear. Replace bolt if worn
more than 1/4 inch at any point. See Image.
Tighten lock nut to 250 ft. lbs.
Avoid personal injury. Blade and/or blade carrier removal should be done only with the
power unit engine shut off, key removed, in park, parking brake on, the auxiliary
hydraulics are disengaged, and the mower securely blocked up.
BLADE CARRIER REMOVAL
Remove cotter pin and loosen slotted nut on spindle shaft. Loosen but do not remove the nut until the blade
carrier is loosened. Use a suitable 2 jaw gear puller to pull carrier off tapered spindle shaft. If gear puller is not
available use long bar inserted through blade bolt access hole with end against rotor bar. Strike opposite end
of bar with sledge hammer. Rotate blade carrier 180 degrees and repeat process.
BLADE CARRIER INSTALLATION
Clean the bore on blade carrier and surface of output shaft. Position carrier on the gearbox output shaft and
install washer and slotted nut.
Tighten nut holding blade carrier to minimum 400 ft. pounds, strike the carrier near the hub several times with a
heavy hammer to seat the hub. Use a suitable spacer over the nut to prevent damage to the nut and threads.
Retighten the nut to 400 ft. pounds. Install cotter pin and spread.
Always recheck spindle output shaft slotted blade carrier retaining nut torque after a few
hours operation.
Maximum Bolt Wear