SECTION 4 – SXM54, SXM60 MOWER DECK
4-31
TROUBLESHOOTING
The following troubleshooting guide is for the mower and its drive. This assumes the tractor engine is
running to prescribed specifications and the tractor hydraulics are working properly. Consult the
applicable Tractor Repair Manual for all tractor system checks.
Before attempting any repair or test, observe the general condition of the tractor and mower. Make
certain the tractor is operating properly and the mower is setup correctly. The following charts may give
you some hints in solving a problem with the mower. If the problem cannot be easily solved, contact
your SHIBAURA Dealer.
SYMPTOM PROBLEM CORRECTION
Excessive Vibration Loose gearbox bolts.
Loose spindle/blade fasteners.
Damaged gearbox.
Worn or damaged driveline U-joints.
Blade interference with grass
buildup.
Blades unbalanced.
Blade broken.
Re-torque or replace as necessary.
Re-torque or replace as necessary.
Rebuild gearbox as necessary.
Rebuild driveline as necessary.
Clean the underside of the deck.
Balance blades.
Replace mowing blades in sets.
Gearbox Overheating Low on lubricant.
Debris buildup on top of deck
around gearbox.
Fill to oil level plug.
Clean deck top and remove debris.
Gearbox Noisy Worn or rough bearings.
Worn or rough gears.
Replace bearings.
Run-in gears, or rebuild gearbox.
Gearbox Leaking Damaged oil seal.
Damaged shaft in seal area.
Oil seal installed wrong, or upside
down.
Oil level too high in housing.
Cracked or broken housings.
Gasket damaged.
Bolts loose.
Replace oil seal.
Replace shaft and oil seal.
Replace oil seal.
Drain oil to correct level.
Replace housings or gearbox
assembly.
Replace liquid gasket.
Re-torque bolts.
Blades Wear Too
Fast
Cutting in sandy conditions.
Cutting in rocky conditions.
Heat treat removed by sharpening
with grinder.
Increase deck cutting height.
Increase deck cutting height.
Replace blades in sets.
Not Cutting Clean Blades dull.
Blades installed upside down.
Blade RPM too low.
Mower not level.
Tractor tires mashing grass.
Ground speed too fast.
Excessive grass buildup under
mower deck.
Sharpen or replace blades.
Install blades correctly.
Use full throttle position.
See cutting height adjustments, Tires
under inflated.
Too wet or lush to cut. Reverse
direction of cut and re-mow the area.
Reduce ground speed.
Clean underside of deck.
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