Poulan Pro 438719 Operator's Manual page 25

TROUBLESHOOTING POINTS
PROBLEM CAUSE
1. Worn, bent or loose blade.
Excessive
2. Bent blade mandrel.
vibration
3. Loose/damaged part(s).
1. Faulty operator-safety presence control
Engine continues
to run when oper-
ator leaves seat
with attachment
clutch engaged
1. Worn, bent or loose blade.
Poor cut - uneven
2. Mower deck not level.
3. Buildup of grass, leaves, and trash under
4. Bent blade mandrel.
5. Clogged mower deck vent holes from
1. Obstruction in clutch mechanism.
Mower blades will
2. Worn/damaged mower drive belt.
not rotate
3. Frozen idler pulley.
4. Frozen blade mandrel.
1. Engine speed too slow.
Poor grass
2. Travel speed too fast.
discharge
3. Wet grass.
4. Mower deck not level.
5. Low/uneven tire air pressure.
6. Worn, bent or loose blade.
7. Buildup of grass, leaves and trash under
8. Mower drive belt worn.
9. Blades improperly installed.
10. Improper blades used.
11. Clogged mower deck vent holes from
1. Switch is "OFF".
Headlight(s) not
2. Bulb(s) or lamp(s) burned out.
working
3. Faulty light switch.
(if so equipped)
4. Loose or damaged wiring.
5. Blown fuse.
1. Bad battery cell(s).
Battery will not
2. Poor cable connections.
charge
3. Faulty regulator (if so equipped).
4. Faulty alternator.
1. Engine throttle control not set at "SLOW"
Engine "back-
fires" when turn-
ing engine "OFF"
1. Reverse operation system (ROS) is not
Engine dies when
tractor is shifted
into reverse
system.
mower.
buildup of grass, leaves, and trash around
mandrels.
mower.
buildup of grass, leaves, and trash around
mandrels.
position for 30 seconds before stopping
engine.
"ON" while mower or other attachment is
engaged.
CORRECTION
1. Replace blade. Tighten blade bolt.
2. Replace blade mandrel.
3. Tighten loose part(s). Replace damaged parts.
1. Check wiring, switches and connections. If not
corrected, contact an authorized service center/
department.
1. Replace blade. Tighten blade bolt.
2. Level mower deck.
3. Clean underside of mower housing.
4. Replace blade mandrel.
5. Clean around mandrels to open vent holes.
1. Remove obstruction.
2. Replace mower drive belt.
3. Replace idler pulley.
4. Replace blade mandrel.
1. Place throttle control in "FAST" position.
2. Shift to slower speed.
3. Allow grass to dry before mowing.
4. Level mower deck.
5. Check tires for proper air pressure.
6. Replace blade. Tighten blade bolt.
7. Clean underside of mower housing.
8. Replace mower drive belt.
9. Reinstall blades sharp edge down.
10. Replace with blades listed in parts manual.
11. Clean around mandrels to open vent holes.
1. Turn switch "ON".
2. Replace bulb(s) or lamp(s).
3. Check/replace light switch.
4. Check wiring and connections.
5. Replace fuse.
1. Replace battery.
2. Check/clean all connections.
3. Replace regulator.
4. Replace alternator.
1. Move throttle control to "SLOW" position and allow
to idle for 30 seconds before stopping engine.
1. Turn ignition key to ROS "ON" position. See
Operation section.
25