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F/N 525746 Jan 09

© 2009 ICS, Blount Inc.

TITLE

680GC OPERATOR’S MANUAL

11

SET-UP

Note 1: Be aware that the guide bar rails may develop sharp edges over time so always pull the
diamond chain by the diamond segments.

Note 2: Do not “over tension” the diamond chain. Loss of power will result. It is normal for the
drivelinks to hang underneath the guide bar. The diamond chain should be tight but be able to be
pulled around the guide bar by hand.

Note 3: To prevent chain tensioner breakage, be sure the side cover nuts are tightened to
approximately 20 ft-lbs (27Nm).

GUIDE BAR AND DIAMOND CHAIN INSTALLATION

STEP 10
Continue to lift up on the nose of the guide
bar and firmly tighten the side cover nuts.
NOTE: To prevent chain tensioner
breakage, be sure the side cover nuts

are tightened to approximately 20 ft-lbs

(27 Nm).

STEP 11
Attach to water source with pressure of not
less than 20 psi (1.5 bar).

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Summary of Contents for 680GC

Page 1: ...F N 525746 Jan 09 2009 ICS Blount Inc 680GC OPERATOR S MANUAL ...

Page 2: ......

Page 3: ...525746 Jan 09 2009 ICS Blount Inc TITLE 680GC OPERATOR S MANUAL 3 TABLE OF CONTENTS SYMBOLS LABELS 4 SAFETY 5 TECHNICAL SPECIFICATIONS 8 SET UP 9 OPERATION 12 MAINTENANCE 17 TROUBLESHOOTING 24 REFERENCE 25 ...

Page 4: ...ous injury A potentially hazardous situation exists which if not avoided may result in minor or moderate injury or property damage A potential situation exists which if not avoided may result in product or property damage THE FOLLOWING SYMBOLS LABELS MAY BE FOUND IN THIS MANUAL OR ON THE SAW Read the operator s manual carefully and understand the contents before you use this equipment Always use P...

Page 5: ...broken or missing side cover bottom guard or guard flap The side cover bottom guard and guard flap provides protection against contact with moving parts ejected debris broken diamond chain thrown water and concrete slurry DO NOT operate a saw with loose missing damaged or improperly repaired parts DO NOT insert a chain based cut off saw into a slot narrower than the diamond chain segments Rapid pu...

Page 6: ... of 20 psi 1 5 bar Insufficient water supply may result in excessive wear to the diamond chain which can lead to loss of strength and diamond chain breakage Never start a chain based cut off saw unless the guide bar diamond chain and side cover are properly installed GENERAL SAFETY PRECAUTIONS Always wear protective clothing including hard hat eye protection hearing protection and gloves Avoid loo...

Page 7: ...ge to the engine Fuel mixture 25 1 gasoline oil mixture Incorrect fuel mixture is the number one cause of piston seizure Use ICS brand two stroke engine oil Never use two stroke oil formulated for water cooled two cycle engines such as outboard motor oil Never use motor oil intended for four stroke engines Use of water is required to cool bar and chain during break in period ENGINE BREAK IN It is ...

Page 8: ... inches 30 5cm 10 inches square 25 4cm Dimensions 18 inches 46cm length 11 5 inches 29cm height 10 inches 25cm width Air Filter Dry nylon Carburetor Walbro WJ85B throttle shaft sealed pressure compensating Starter Dust and water shielded Ignition Special water resistant electronic ignition Clutch Three weight single spring Fuel ratio 25 1 gasoline to oil Fuel Capacity 0 23 gal 88 liter 15 18 minut...

Page 9: ...TION STEP 4 Mount the diamond chain on the guide bar starting at the drive sprocket and continue over the guide bar nose STEP 2 Remove shipping spacer Install the diamond chain correctly If using a single bumper chain the bumper must always lead the segment into the cut as shown here STEP 5 Install the side cover STEP 3 Place bar onto studs and chain adjustment pin ...

Page 10: ... allow the drive sprocket to spin without turning the chain which can chew up the chain drive links If the chain is too tight a lot of the saw s power goes into turning the chain rather than into the cut In extreme over tightened cases the saw may not be able to turn the chain at all In addition damage can occur to the bar nose and premature stretch may occur See Note 1 STEP 9 Before cutting check...

Page 11: ...de bar The diamond chain should be tight but be able to be pulled around the guide bar by hand Note 3 To prevent chain tensioner breakage be sure the side cover nuts are tightened to approximately 20 ft lbs 27Nm GUIDE BAR AND DIAMOND CHAIN INSTALLATION STEP 10 Continue to lift up on the nose of the guide bar and firmly tighten the side cover nuts NOTE To prevent chain tensioner breakage be sure th...

Page 12: ...y to prevent moisture from getting into the fuel Always begin mixing fuel by adding half the amount of gasoline to be used Then add the correct amount of two stroke oil for 25 1 mixture and finish filling the container with gasoline Do not mix more than one month s supply of fuel This helps prevent the separation of the two stroke oil from the gasoline varnishing If the cut off saw is not used for...

Page 13: ...lls 14 When the engine starts allow the engine to idle Pull on the throttle trigger several times to help warm up the engine 15 Open the water valve completely CAUTION OPERATION STARTING AND STOPPING A CHAIN BASED CUT OFF SAW Never start a chain based cut off saw without the guide bar diamond chain and side cover properly assembled The clutch may come loose and cause personal injury Always move a ...

Page 14: ...ing loose fitting clothing Diamond chains with SealPro require a minimum water pressure of 20 psi 1 5 bar PLANNING THE CUT Outline the cut with a permanent marker for a visual cutting guide Avoid pinching the guide bar and diamond chain Always cut the bottom of an opening first then top and then the sides Save the easiest cut for last For the straightest cuts use the Step Cut method First score th...

Page 15: ...d more quickly enable the use of the Wallwalker Use the fixed Wallwalker to help cut more efficiently and reduce operator fatigue The fixed Wallwalker is a fulcrum that can be used to apply additional force when cutting To use correctly plunge into the wall and simply engage the point of the fixed Wallwalker into the cut and pry upward with the rear handle As the cut off saw begins to rotate up fe...

Page 16: ... any water in the carburetor or exhaust system If water enters exhaust port point the guide bar tip down and pull the starter handle several times to expel water from muffler Remove guide bar and diamond chain Flush out the chain tensioner with high water pressure and lubricate with grease After cleaning the cut off saw spray the entire saw body diamond chain guide bar and drive sprocket with ligh...

Page 17: ...d 5 Inspect the starter cord Replace if frayed 6 Clean air filter Inspect the air filter for holes Replace as necessary 7 Spray saw guide bar and chain with lightweight oil 8 Grease the chain tensioner AFTER 10 HOURS OF USE 1 Remove the starter cover and lubricate the starter recoil spring Clean the flywheel fins and the starter pawls with a wire brush then grease the starter pawls 2 Remove the sp...

Page 18: ... the starter cord for fraying replace if necessary Figure 3 The air filter is made from a nylon micro mesh air filter and an internal spit back screen Both must be kept clean for the engine to operate properly If the saw is not reaching full RPM most likely one or both of the air filters are dirty The air filter Figure 1 should be free of holes and white in color Replace air filter when dirty The ...

Page 19: ...MBLY To reattach the starter housing first pull the starter cord out then hold the starter housing against the crankcase Figure 3 Slowly release the starter cord to enable the pulley to fit between the pawls Insert and tighten the screws Use blue Loctite 242 Figure 3 STARTER CORD REPLACEMENT Remove the 4 screws that attach the starter assembly to the crankcase Pull the cord out approximately 8 and...

Page 20: ...used Inspect the rim sprocket for wear Replace the rim sprocket if the drive teeth become pointed Check the drive sprocket bearing by spinning clutch cup Replace the bearing if it is worn out The needle bearing on the drive shaft must be greased regularly use high quality water resistant bearing grease Figure 2 Clutch Cup Splined Adapter Rim Sprocket CHAIN TENSIONER The chain tensioner Figure 1 ca...

Page 21: ...er clockwise on the drive shaft and firmly tighten Replace the clutch slurry shield Installation of drive sprocket assembly is now complete Figure 2 DRIVE SPROCKET REMOVAL Remove the side cover guide bar diamond chain and clutch slurry shield Remove the spark plug and insert the piston stop supplied with each saw into the spark plug hole Pull the starter cord slowly until the piston stops Figure 1...

Page 22: ... recommended spark plug type Using the wrong spark plug can severely damage the piston and cylinder Champion RCYJ4 Figure 1 CARBURETOR The function of the carburetor is to mix fuel with air Adjustments other than idle speed should be made by a servicing dealer Before adjusting the engine idle speed make sure the air filter is clean and the engine is warmed up T Idle Screw Figure 2 is adjusted so t...

Page 23: ...bar for straightness Minor adjustments can be made by bending the guide bar slightly Proper diamond chain tension will extend guide bar life See page 9 Under some circumstances especially low water pressure the sprocket nose can wear out before the guide bar body Sprocket nose replacement kits may be purchased from an Authorized Dealer part 70249 Spray the diamond chain and guide bar with lightwei...

Page 24: ... is kinked or supply is not turned on WON T START Turn ignition switch on or possible defective spark plug WON T START Low compression less than 120 psi 8 bar Possible incorrect fuel mixture Reference new 150 to 180 psi 10 to 12 bar used 140 to 160 psi 9 to 11 bar DIFFICULT TO START Possible flooded engine Turn ignition switch on push choke in hold throttle on full with foot and pull starter cord ...

Page 25: ...Soft aggregates 30 50 sq in min 190 320 sq cm min INCH FOOT DEFINITION An in ft is a measure of how much material is to be cut An in ft is defined as depth in inches times length in feet Note 129 in ft 1m2 Example How many in ft are in this doorway 1 Determine the depth of the cut in inches For this example 8 inches 2 Determine the length of the cut in feet 3 7 3 7 20 feet 3 Multiply the two numbe...

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Page 28: ... 2009 ICS Blount Inc F N 525746 Jan 09 ICS Blount Inc 4909 SE International Way Portland OR 97222 Tel 800 321 1240 Fax 503 653 4393 icsbestway com 680GC OPERATOR S MANUAL ...

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