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15

MAINTENANCE

REPLACINg THE BAR AND CHAIN

See Figures 15 - 20.

WARNINg: 

To avoid possible serious injury, stop engine before re-
placing the bar, chain, or performing any maintenance 
operation.

  Remove the bar nut and drivecase cover.

  The bar contains a bar stud slot that fits over the bar stud. 

The bar also contains a chain tensioning pin hole which 
fits over the chain tensioning pin.  

   Place the bar onto the bar stud so that the chain tension-

ing pin fits into the chain tensioning pin hole.

   Fit the chain over the sprocket and into the bar groove.  

The cutters on the top of the bar should face toward the 
bar tip, in the direction of the chain rotation.  

   Replace  the  drivecase  cover  and  install  the  bar  nut.  

Tighten the bar nut finger tight only. The bar must be free 
to move for tension adjustment.

CHAIN 

TENSIONING SCREw

Fig. 19

BAR NUT

Fig. 0

   Remove all slack from chain by turning the chain tension-

ing screw clockwise, assuring that the chain seats into 
the bar groove during tensioning. 

   Lift the tip of the bar up to check for sag. Release the tip 

of the bar, and turn the chain tensioning screw 1/ turn 
clockwise. Repeat this process until sag does not exist.

   Hold  the  tip  of  the  bar  up  and  tighten  the  bar  nut  

securely.

   Chain is correctly tensioned when there is no slack on 

the underside of the bar, the chain is snug, but it can be 
turned by hand without binding.

 

NOTE:  If chain is too tight, it will not rotate. Loosen the 
bar nut slightly and turn adjusting screw 1/4 turn counter-
clockwise. Lift the tip of the bar up and retighten bar nut.

CHAIN 

ROTATION

BAR NUT

CHAIN

SPROCKET

Fig. 18

BAR

DRIVECASE

COVER

BAR NUT

CHAIN

Fig. 15

DRIVECASE

COVER

CHAIN 

TENSIONING PIN

BAR NUT

Fig. 16

BAR STUD SLOT

BAR STUD

CHAIN TENSIONING 

PIN HOLE

BAR

SPROCKET

Fig. 17

Содержание RY52504

Страница 1: ...nd manufactured to our high standard for dependability ease of operation and operator safety When properly cared for it will give you years of rugged trouble free performance WARNING To reduce the ris...

Страница 2: ...ntenance 14 18 Troubleshooting 19 Warranty 20 22 Parts Ordering Service 24 TABLE OF CONTENTS INTRODUCTION This product has many features for making its use more pleasant and enjoyable Safety performan...

Страница 3: ...fler or cylinder of the unit These parts get hot from operation Failure to heed this warning could result in possible serious personal injury Carry the chain saw with the engine stopped the guide bar...

Страница 4: ...s dry clean and free of lubricant or fuel mixture Shut off the engine and make sure the cutting attachment has stopped before setting the unit down To prevent electrical shock or serious personal inju...

Страница 5: ...this equipment Safety Footwear Wear non slip safety footwear when using this equipment Gloves Wear non slip heavy duty protective gloves when handling the pole pruner attachment and the saw chain Mov...

Страница 6: ...rdous situation which if not avoided may result in minor or moderate injury CAUTION Without Safety Alert Symbol Indicates a situation that may result in property damage WARNING To avoid serious person...

Страница 7: ...mps fuel from the fuel tank to the car buretor This is necessary only when starting a cold engine or after refueling an engine that has run out of fuel shoulder strap The shoulder strap helps support...

Страница 8: ...8 in x 3 4 in 8 oz Bar and Chain Lubricant Bottle of 2 cycle Lubricant Shoulder Strap Hanger with mounting hardware Shoulder Strap J Handle Assembly J Handle Top and Bottom Clamp Short Bolt Long Bolt...

Страница 9: ...bar and chain lubrication Add bar and chain lubricant in the bar lube reservoir before starting the engine of the power head Refer to Automatic bar and chain lubrication in the Maintenance section of...

Страница 10: ...mum octane rating requirements Before us ing an oxygenated fuel try to confirm the fuel s contents Some states provinces require this information to be posted on the pump The following are the EPA app...

Страница 11: ...on the unit whenever the engine is running Use your right hand to firmly grip the rear handle while your left hand has a firm grip on the front handle n Hold unit firmly with both hands Always keep y...

Страница 12: ...nd limbs up to 6 in in diameter For best results observe the follow ing precautions n Plan the cut carefully Be aware of the direction in which the branch will fall n Branches may fall in unexpected d...

Страница 13: ...ce n PRIME Press the primer bulb 7 times n SET the start lever to the START position n PULL the rope until the engine starts n Allow the engine to run for 6 10 seconds n Squeeze trigger lock and throt...

Страница 14: ...ns should be performed by competent chain saw service personnel For example if improper tool is used to hold the flywheel in order to remove the clutch structural damage to the flywheel could occur an...

Страница 15: ...r tension adjustment CHAIN TENSIONING SCREW Fig 19 BAR NUT Fig 20 n Remove all slack from chain by turning the chain tension ing screw clockwise assuring that the chain seats into the bar groove durin...

Страница 16: ...ten securely n Check and refill the bar lube reservoir every time the engine is fueled NOTE Do not use dirty used or otherwise contaminated lubricant Damage may occur to the oil pump bar or chain Fig...

Страница 17: ...holder n Keep the file level with the top plate of the tooth Do not let the file dip or rock LEFT HAND CUTTERS RIGHT HAND CUTTERS Fig 27 CAUTION Dull or improperly sharpened chain can cause excessive...

Страница 18: ...30 Clean all foreign material from the product Store idle unit indoors in a dry well ventilated area that is inaccessible to children Keep away from corrosive agents such as garden chemicals and de ic...

Страница 19: ...ntact a servicing dealer Engine starts but will only run at high speed at half choke Carburetor requires adjustment Contact a servicing dealer Engine does not reach full speed and emits excessive smok...

Страница 20: ...does not extendtorepairsmadenecessarybynormalwearorbythe use of parts or accessories which are either incompatible with the ryobi brand outdoor product or adversely affect its operation performance o...

Страница 21: ...interpreted as follows Any warranted part that is not scheduled for replacement as required in the Emissions Maintenance Schedule and Warranty Parts List set forth below is warranted for two years If...

Страница 22: ...RRANTED FOR TWO YEARS OR FOR THE PERIOD OF TIME PRIOR TO THE PARTS FIRST SCHEDULED REPLACEMENT WHICHEVER COMES FIRST this product was manufactured with a catalyst muffler Congratulations You have made...

Страница 23: ...23 NOTES...

Страница 24: ...rts please obtain your model and serial number from the product data plate MODEL NUMBER SERIAL NUMBER How to obtain Replacement Parts Replacement parts can be purchased online at www ryobitools com or...

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