Not for
Reproduction
54
Problem: Engine exhaust is black.
Cause
Remedy
Dirty air filter.
Replace air filter. See the engine
manufacturer's operator's manual.
Air in the fuel system.
Prime the fuel system.
Problem: Engine runs but unit will not drive.
Cause
Remedy
Hydraulic pump dump valve(s) in
"open" position.
Turn dump valve(s)
clockwise
to close. Torque to 80-120 in-lbs
(9-13,5 Nm).
Belt is broken.
See
Pump Drive Belt Replacement
.
Drive belt slips.
See problem and cause below.
Brake is not fully released.
See authorized service dealer.
Problem: Unit drive belt slips.
Cause
Remedy
Pulleys or belt greasy or oily.
Clean as required.
Belt tension is too loose.
Adjust spring tension. See
Pump
Drive Belt Replacement
.
Belt stretched or worn.
Replace belt.
Problem: Parking brake will not hold.
Cause
Remedy
Brake is incorrectly adjusted.
See
Parking Brake Adjustment
.
Brake pads worn.
Replace with new brake pads.
Problem: Unit steers or handles poorly.
Cause
Remedy
Steering linkage is loose.
Check and tighten any loose
connections.
Improper tire inflation.
See
Checking Tire Pressures
.
Problem: Engine RPMs cannot be changed.
Cause
Remedy
Diesel particulate filter needs to be
cleaned.
See
Regen Process (Clean Diesel
Particulate Filter)
.
Troubleshooting the Mower
Problem: Mower Deck will not raise.
Cause
Remedy
Deck Lift Linkage not properly
attached or damaged.
See authorized service dealer.
Leak in the hydraulic system.
See authorized service dealer.
Problem: Engine stalls easily
with the mower deck engaged.
Cause
Remedy
Engine speed too slow.
See engine speed to full throttle.
Ground speed too fast.
Decrease ground speed.
Cutting height set too low.
Cut tall grass at a higher cutting
height during the first pass and then
lower deck and cut again.
Discharge chute jamming with cut
grass.
Cut grass with discharge pointing
towards previously cut area.
Problem: Excessive mower vibration.
Cause
Remedy
Problem: Excessive mower vibration.
Blade mounting bolts are loose.
Tighten the blade mounting bolts to
120 ft-lbs (163 Nm).
Mower blades, spindles, or pulleys
are bent.
Check and replace as necessary.
Mower blades are out of balance.
Remove, sharpen, and balance
blades. See
Servicing the Mower
Blades
.
Belt installed incorrectly.
Install belt correctly.
Problem: Excessive belt wear or breakage.
Cause
Remedy
Bent or rough pulleys.
Repair or replace.
Using incorrect belt.
Replace with correct belt.
Incorrect belt tension.
Adjust the correct tension.
Problem: Mower drive belt slips or fails to drive.
Cause
Remedy
Incorrect belt tension.
Adjust to the correct belt tension.
Drive belt is broken.
Replace with a new belt.
Problem: Mower deck does not engage.
Cause
Remedy
Electrical wiring damage.
Locate and repair damaged wire.
Battery voltage too low.
Recharge battery and check
alternator. See
Battery Service
.
Problem: Mower disengages during operation and
will not re-engage (See
Deck Shut Down Module
.
Cause
Remedy
Unit has overheated.
Allow the engine to cool, disengage
the mower deck, and then re-engage
the mower deck.
Unit has lost oil pressure.
Shut the unit down and see
authorized service dealer.
Troubleshooting Common Cutting
Problems
Problem: Streaking
Streaking is when thin strips of uncut grass are left behind the mower.
Streaking is usually caused by operator error or poor blade maintenance.
Cause
Remedy
Blades are not sharp.
Sharpen your blades.
Blades are worn down too far.
Replace your blades.
Engine speed is too slow.
Always mow at full throttle.
Ground speed is too fast.
Slow down.
Deck is plugged with grass.
Clean out the mower.
Not overlapping cutting rows enough. Overlap your cutting rows
Not overlapping enough when
turning.
When turning your effective cutting
width decreases–overlap more when
turning.
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