Craftsman 28927 - YT 4000 24 HP 42" Yard Tractor Operator's Manual page 32

TROUBLESHOOTING CHART:
See appropriate section in manual unless directed to Sears service center
PROBLEM CAUSE CORRECTION
Poor grass 1 Engine speed too slow. 1 Place throttle control in "FAST"
discharge position.
2 Travel speed too fast. 2 Shift to slower speed.
3 Wet grass. 3 Allow grass to dry before mowing.
4 Mower deck not level. 4 Level mower deck.
5 Low/uneven tire air pressure.
6 Worn, bent or loose blade.
5 Check tires for proper PSI.
6 Replace/sharpen blade. Tighten
blade bolt.
7 Buildup of grass, leaves and
trash under mower.
7 Clean underside of mower
housing.
8 Mower drive belt worn.
8 Replace mower drive belt.
9 Blades improperly installed. 9 Reinstall blades sharp edge down.
10 Improper blades used. 10 Replace with blades listed in
this manual.
11 Clogged mower deck vent holes 11 Clean around mandrels to
from buildup of grass, leaves, and open vent holes.
trash around mandrels.
Headlight(s) not
working
(if so equipped)
1 Light switch is "OFF".
2 Bulb(s) or lamp(s) burned out.
3 Faulty light switch.
4 Loose or damaged wiring.
1 Turn light switch "ON".
2 Replace bulb(s) or lamp(s).
3 Check/replace light switch.
4 Check wiring and connections.
Battery will not
charge
5 Blown fuse.
1 Bad battery cell(s).
2 Poor cable connections.
5 Replace fuse.
1 Replace battery.
2 Check/clean all connections.
Loss of drive
3 Faulty regulator (if so equipped).
4 Faulty alternator.
1 Freewheel control in
"DISENGAGED" position.
2 Debris on steering plate (if
equipped).
3 Motion drive belt worn, damaged,
or broken.
3 Replace regulator.
4 Replace alternator.
1 Place freewheel control in
"ENGAGED" position.
2 See "CLEANING" in the
maintenance section.
3 Replace motion drive belt.
4 Air trapped in transmission during 4 Purge transmission.
shipment or servicing.
5 Axle key missing.
5 Install axle key at rear wheel. See
"TO REMOVE WHEEL" in the
Service and Adjustments section.
Engine "backfires"
when turning
engine "OFF"
Engine throttle control not sel 1 Move throttle control between
between half and full speed (fast) half and full speed (fast) position
position before stopping engine, before stopping engine.
Engine dies when 1 Reverse operation system (ROS) 1 Turn ignition key to ROS "ON"
tractor is shifted is not "ON" while mower or other position. See Operation section.
into reverse attachment is engaged.
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