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Section 8: Troubleshooting
ZT60i & ZT72i (S/N 748110+) Accu-Z
®
Zero Turn Mowers 357-552M
Table of Contents
2/06/14
Section 8: Troubleshooting
Troubleshooting Chart
Symptoms Probable Causes Suggested Remedies
Starting motor does not crank
engine.
Control levers are not in neutral position
and fully out.
Place control lever in neutral and fully out.
Park brake not engaged (ON). Engage park brake.
Control lever interlock switch is not
adjusted correctly.
Have your dealer re-adjust the interlock switch.
Blade Engagement switch is engaged. Disengage blade switch.
Weak or dead battery. Recharge or replace.
Loose or broken switches
and/or damaged electrical wiring.
Repair or replace switches and electrical
wiring.
Other causes See Engine Operator’s Manual.
Engine cranks but does not start.
No fuel in the fuel tanks. Fill tank.
Fuel filter and/or fuel line plugged. Replace fuel filter and/or fuel line.
Other causes See Engine Operator’s Manual.
Engine runs with continuous
misfiring, runs unevenly or runs
erratically.
Other causes See Engine Operator’s Manual.
Grass cutting is ragged or uneven
Dull, bent, or broken cutting blades. Sharpen or replace cutting blades.
Deck full of wet sticky grass. Clean underside of deck.
Cutting Blades are not operating at full
engine speed.
Increase engine rpms to full speed (3600 rpm)
Check engine speed with Land Pride Inductive
Tachometer, Part No. 890-909C.
Belt over center take-up is loose. Tension over center take-up.
Worn or broken belt. Replace worn and broken belt. See “Belt
Maintenance” on page 37.
Deck is not level. Check air pressure in all 4 tires
Make level adjustments to the deck.
See “Deck Cutting Height and Leveling” on
page 29.
Loss of power or system will not
operate in either direction.
Bypass valve is open. Close bypass valve. See “Moving Mower
with Stalled Engine” page 17.
Bypass assembly is sticking. See your dealer.
Mower is loaded excessively. Reduce load on mower.
Steering hardware is loose or lost. Replace steering hardware.
Bad ground drive belt and/or pump idler
pulley.
Replace belt and/or idler pulley Tighten idler
pulley if loose.
Loose, lost, or broken belt take-up spring. Reattach or replace belt take-up rod.
Restrictions in air cleaner. Service air cleaner.
Internal interference or leakage in
transaxle.
See your dealer.
Oil level in transaxle is low. Fill transaxle to the correct level.
Poor compression. See your dealer.
Steering linkage is bent or needs
adjustment.
Adjust linkage. See “Steering Adjustments”
on page 26.
Air is trapped in the hydraulic system. Purge transaxle of air or see your dealer.
Other causes See Engine Operator’s Manual.