Poulan Pro PP446ET - Manual (Page 17)

17
MAINTENANCE
WARNING: Disconnect the spark
plug before performing maintenance except
for carburetor adjustments.
HELPFUL TIP
IMPORTANT: Have all
repairs other than the rec-
ommended maintenance
described in the instruction
manual performed by an
authorized service dealer.
If any dealer other than an authorized
service dealer performs work on the
product, Poulan PRO may not pay for
repairs under warranty. It is your re-
sponsibility to maintain and perform
general maintenance.
CHECK FOR LOOSE
FASTENERS AND PARTS
S Spark Plug Boot
S Air Filter
S Housing Screws
S Assist Handle Screw
S Debris Shield
CHECK FOR DAMAGED OR
WORN PARTS
Contact an authorized service dealer for re-
placement of damaged or worn parts.
S
ON/STOP Switch -- Ensure ON/STOP
switch functions properly by pushing and
releasing the switch. Make sure engine
stops. Wait 5 seconds before attempting to
restart unit to allow switch to reset. Restart
engine and continue.
S Fuel tank -- Discontinue use of unit if fuel
tank shows signs of damage or leaks.
S Oil tank -- Discontinue use of unit if oil tank
shows signs of damage or leaks.
S Debris shield -- Discontinue use of unit if de-
bris shield is damaged.
INSPECT AND CLEAN UNIT AND LA-
BELS
S After each use, inspect complete unit for
loose or damaged parts. Clean the unit and
labels using a damp cloth with a mild deter-
gent.
S Wipe off unit with a clean dry cloth.
CHECK CHAIN TENSION
WARNING:
Wear protective gloves
when handling chain. The chain is sharp and
can cut you even when it is not moving. Make
chain adjustments with lower end supported.
Chain tension is very important. Chains
stretch during use. This is especially true dur-
ing the first few times you use your pruner. Al-
ways check chain tension each time you use
and refuel your unit.
1. Use the screwdriver end of the chain ad-
justment tool (bar tool) to move chain
around guide bar to ensure kinks do not
exist. The chain should rotate freely.
Chain Adjustment Tool
Guide
Bar
2. Loosen bar clamp nut until it is finger tight
against the bar clamp.
Bar clamp nut Adjusting Screw
3. Turn adjusting screw clockwise until
chain solidly contacts bottom of guide bar
rail. Then, turn adjusting screw an addi-
tional 1/4 turn.
Adjusting Screw -- 1/4 Turn
4. Using bar tool, roll chain around guide bar
to ensure all links are in bar groove.
5. Lift up tip of guide bar to check for sag.
Release tip of guide bar, then turn adjust-
ing screw 1/4 turn clockwise. Repeat until
sag does not exist.
6. While lifting tip of guide bar, tighten bar
clamp nut securely with the bar tool.
7. Use the screwdriver end of the bar tool to
move chain around guide bar.
8. If chain does not rotate, it is too tight.
Slightly loosen bar clamp nut and loosen
chain by turning the adjusting screw 1/4
turn counterclockwise. Retighten bar
clamp nut.
9. If chain is too loose, it will sag below the
guide bar and needs to be tightened fol-
lowing above procedure.
WARNING: DO NOT operate the
pruner if the chain is loose. If the pruner is oper-
ated with a loose chain, the chain could jump off
the guide bar and result in serious injury.
CHECK CHAIN SHARPNESS
A sharp chain makes wood chips. A dull chain
makes a sawdust powder and cuts slowly.
See CHAIN SHARPENING in the SERVICE
AND ADJUSTMENTS section.
CLEAN AIR FILTER
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.