Blount Chainsaw 853PRO User Manual

853PRO Hydraulic Saw  
OPERATOR’S MANUAL  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
 
SYMBOLS & LABELS  
853PRO OPERATOR’S MANUAL  
THE FOLLOWING SYMBOLS AND DEFINITIONS ARE FOUND THROUGHOUT THIS MANUAL  
AND ARE DESIGNED TO MAKE YOU AWARE OF POTENTIAL HAZARDS OR UNSAFE  
PRACTICES.  
A potentially hazardous situation exists which, if not avoided,  
could result in death or serious injury.  
WARNING  
A potentially hazardous situation exists which, if not avoided,  
may result in minor or moderate injury or property damage.  
CAUTION  
A potential situation exists which, if not avoided, may result in  
product or property damage.  
IMPORTANT  
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:  
• Protective helmet  
• Ear protection  
• Protective glasses or full face protection  
Wear hand protection  
WARNING  
• Inserting the tool into a pre-cut slot that is  
• Do not exceed the hydraulic flow  
narrower than the chain may cause binding  
recommended for your saw model: 8 gpm,  
and rapid push-back of the tool toward the  
(30 lpm) or 12 gpm (45 lpm) at 2,500 psi  
(172.5 bar) hydraulic pressure  
• Minimum water pressure 20 psi (1.5 bar)  
• Weight 23 lbs (10.4 kg) w/out bar and chain  
operator  
• Always operate tool with solid footing and  
firm hand grip  
• Contact at a hydraulic leak or burst can  
cause oil injection into the body  
READ OPERATIONS & MAINTENANCE MANUAL BEFORE USE OF TOOL.  
FAILURE TO OBSERVE THESE PRECAUTIONS CAN RESULT IN SERIOUS  
PERSONAL INJURY  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
4
 
853PRO OPERATOR’S MANUAL  
SAFETY  
THE FOLLOWING SYMBOL APPLIES TO ALL THE ITEMS LISTED ON THIS PAGE  
A potentially hazardous situation exists which, if not avoided,  
WARNING  
could result in death or serious injury.  
Diamond chain breakage can result in high-speed ejection of parts, which can result in death  
or serious personal injury to operators or bystanders. The items listed below are critical to  
minimizing the risk of diamond chain breakage and injury.  
• DO NOT operate a diamond chainsaw with a damaged, modified, 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 saw with loose, missing damaged or improperly repaired parts.  
DO NOT exceed the hydraulic flow for your saw model: 8 gpm (30 lpm) or 12 gpm (45 lpm)  
at 2,500 psi (172.5 bar) hydraulic pressure.  
• DO NOT install or run the chain backwards. The bumper should lead the segment into the  
cut.  
Bumper  
• DO NOT run the saw backwards. The chain should travel away from the operator on the  
top of the bar and return on the bottom of the bar.  
• DO NOT insert the diamond chainsaw into a slot narrower than the chain segments.  
Rapid pushback might occur. Ref: Most diamond segements are .225 (5.72 mm) wide.  
• DO NOT use the 853PRO side cover as a replacement cover for another saw.  
• DO NOT run the saw upside-down. Concrete debris can fly back into the operator’s face.  
• NEVER cut ductile iron pipe with the saw. Segment loss or diamond chain breakage may  
occur.  
• DO NOT use your hands to search for hydraulic leaks. Hydraulic fluid escaping under  
pressure can penetrate skin. If any hydraulic flud is injected into skin seek medical  
attention immediately.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
5
 
SAFETY  
853PRO OPERATOR’S MANUAL  
THE FOLLOWING SYMBOL APPLIES TO ALL ITEMS LISTED ON THIS PAGE  
A potentially hazardous situation exists which, if not avoided,  
CAUTION  
may result in minor or moderate injury or property damage.  
• Always turn the saw OFF when performing maintenance on the saw including diamond  
chain tensioning.  
• Never use equipment that is not functioning properly. Have the saw repaired by qualified  
service personnel.  
• Diamond chains require a minimum water pressure 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 the 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 loose fitting clothing.  
• Perform safety checks before starting each day.  
• Always operate tool with solid footing and with both hands on cut-off saw.  
• Remove or control slurry to prevent slippery conditions while cutting.  
• Be sure there are no obstructions (plumbing, electrical conduit, air ducts) and no unnecessary  
people present.  
• Set up a well-marked safety zone with a roped boundary and clear signs.  
• Provide adequate ventilation when working in an enclosed area. Breathing exhaust gases is  
dangerous.  
• To avoid electrocution, check for live electrical wiring near cutting area.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
6
 
853PRO OPERATOR’S MANUAL  
TECHNICAL SPECIFICATIONS  
853PRO 8 gpm (30 lpm)  
23 lbs (10.4 kg)  
853PRO 12 gpm (45 lpm)  
23 lbs (10.4 kg)  
Weight w/out bar and chain  
Length  
Height  
Width  
23 inches (58.5 cm)  
10.5 inches (26.5 cm)  
9.5 inches (24 cm)  
23 inches (58.5 cm)  
10.5 inches (26.5 cm)  
9.5 inches (24 cm)  
Hydraulic Supply  
8 gpm (30 lpm) @ 2,500 psi (172.5 bar)  
Mobil DTE 13M or equivalent  
Minimum: 20 psi (1.5 bar)  
12 gpm (lpm) @ 2,500 psi (172.5 bar)  
Mobil DTE 13M or equivalent  
Minimum: 20 psi (1.5 bar)  
1 gpm (4 lpm) minimum  
Hydraulic Fluid  
Requirements (Type)  
Water Pressure  
Water Flow  
Operating Speed  
Noise Level  
Vibration  
1 gpm (4 lpm) minimum  
5,700 rpm (avg. free running)  
4,800 sfm (avg. free running chain)  
5,300 rpm (avg. free running)  
4,500 sfm (avg. free running chain)  
88 dB @ 3 ft (1 m)  
88 dB @ 3 ft (1 m)  
4 m/sec² (front handle)  
Ref. ISO standard no. 7505  
4 m/sec² (front handle)  
Ref. ISO standard no. 7505  
Torque  
130 in-lbs (176 Nm)  
11.5 hp (8.6 kW)  
207 in-lbs (280 Nm)  
17.5 hp (13 kW)  
Horsepower  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
7
 
SET-UP  
853PRO OPERATOR’S MANUAL  
GUIDE BAR AND DIAMOND CHAIN INSTALLATION  
STEP 4  
STEP 1  
Mount the chain on the bar starting  
at the drive sprocket & continue  
over the bar nose.  
Loosen the side cover nuts and  
remove the side cover.  
Install the chain correctly. The  
bumper must always lead the  
segment into the cut as shown here.  
STEP 2  
Place the bar onto the studs and the  
chain adjustment pin.  
STEP 3  
STEP 5  
Turn the chain-tensioning screw  
CCW until the bar comes into  
contact with the drive sprocket.  
Make sure all of the drive links are  
inside the bar groove, then pre-  
tension the chain.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
8
 
853PRO OPERATOR’S MANUAL  
SET-UP  
GUIDE BAR AND DIAMOND CHAIN INSTALLATION  
STEP 8  
STEP 6  
Tension the chain. 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 snug but be able to be  
pulled around the guide bar by  
hand.  
Install the bar clamp plate over the  
bar studs.  
STEP 7  
Install the side cover over the bar  
studs and install side cover nuts.  
Finger tighten only.  
STEP 9  
Lift up on the nose of the bar and  
firmly tighten the side cover nuts. To  
prevent chain tensioner breakage,  
be sure the side cover nuts are  
tightened to approximately 20 ft-lbs  
(27 Nm).  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
9
 
OPERATION  
853PRO OPERATOR’S MANUAL  
PRE-CUT CHECKLIST  
• Proper Diamond Chain Tension: The diamond chain should be tight but easily pulled around the  
guide bar by hand.  
• Ensure all safety devices are properly mounted and functional and that all controls are in proper  
working order.  
• Be sure there are no obstructions (plumbing, electrical conduit, air ducts).  
• Always wear protective clothing, including hard hat, eye protection, hearing protection, non-slip  
safety boots, gloves, and avoid wearing loose fitting clothing.  
• Adequate Water Supply and Pressure  
1 gpm (4 lpm) recommended flow  
Minimum water pressure 20 psi (1.5 bar)  
Note: The single most important factor an operator can control to increase chain life is to  
use adequate water pressure. Insufficient water supply will result in excessive wear to the  
chain, which can lead to loss of strength and chain breakage.  
• Proper Hydraulic Supply to the saw  
Maximum Flow 8 gpm (30 lpm) or 12 gpm (45 lpm), depending on saw model  
Maximum Hydraulic Pressure 2,500 psi (172.5 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 the entire cut line approximately  
a 1/2 inch (12 mm) deep using the nose of the guide bar. Next, deepen the cut by about 2 inches  
(50 mm). Then plunge all the way through and complete the cut using the WallWalker®.  
• Be sure cut concrete cannot fall and injure operator or bystanders. Concrete is very heavy, one  
cubic foot = 12 in x 12 in x 12 in = 150 lbs (30 cm x 30 cm x 30 cm = 68 kg).  
• Check for live electrical wiring near the cutting area or in the concrete to avoid electrocution.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
10  
 
853PRO OPERATOR’S MANUAL  
CUTTING TIPS  
OPERATION  
• To start a cut, hold trigger on full throttle and slowly plunge the nose of the guide bar straight into  
the wall. Use the fixed WallWalker® as a pivot point and pull up on the rear handle to rotate the  
guide bar into the cut.  
• Always operate the saw at full throttle. Apply enough feed force so that the free running RPM  
drops 20 to 30%. If too much force is applied, the saw will lug or stall. The diamond chain will not  
have enough speed to cut effectively. If too little feed force is applied, the diamonds will skid and  
glaze over.  
• For straighter cuts use the “Step Cut” method. First score the entire cut line with the nose of the  
guide bar approximately 1/2 inch (12 mm) to 1 inch (25 mm) deep. Next, deepen the cut by about  
2 inches (50 mm). This groove will help guide the guide bar for a straight cut. Then plunge all the  
way through and complete the cut using the WallWalker®.  
• Use the WallWalker® to help cut more efficiently and reduce operator fatigue. The WallWalker®  
is a fulcrum that converts inward force to downward force and will develop a 4-to-1 mechanical  
advantage. To use correctly, plunge into the wall and simply engage the point of the WallWalker®  
into the cut and push straight in. The WallWalker® will force the saw to feed down.  
• Apply upward force on the trigger handle to keep the WallWalker® engaged properly, otherwise  
the WallWalker® pick will skid, which will reduce the effectiveness. As the saw begins to rotate up,  
feed force is developed down the line of the intended cut. Once the saw is fully rotated upwards,  
pull the saw out of the cut a few inches and re-engage the WallWalker® to the wall and repeat.  
• When cutting rebar, slowly rock the saw so that you’re always cutting concrete as well as steel.  
This will help keep the diamonds exposed. Also, expect less diamond chain life when cutting  
rebar.  
• Expect more diamond chain stretch and guide bar wear when making “nose buried” cuts for  
extended periods of time, as the diamond chain does not have a chance to throw the slurry away  
from the nose of the guide bar.  
• If the saw begins to cut consistently crooked, turn the guide bar over and use the other side.  
Dress worn rails with belt sander.  
Note: The normal life of a guide bar is two to three diamond chains. Rebar can shorten  
guide bar life.  
• When using a new diamond chain, you can increase the cutting speed by opening up the  
diamonds by making a few cuts in an abrasive material such as a cinder block.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
11  
 
MAINTENANCE  
853PRO OPERATOR’S MANUAL  
SYSTEM CLEAN-UP  
• After cutting, run the saw for at least 15 seconds with the water on to flush slurry and debris from  
diamond chain, guide bar and drive sprocket.  
• Wash concrete slurry from saw assembly.  
• Avoid getting 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 lube with grease.  
• After cleaning the saw, spray the entire saw body, diamond chain, guide bar, and drive sprocket  
with lightweight oil. Using lightweight oil on the saw will minimize rust and help reduce slurry  
build up.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
12  
 
853PRO OPERATOR’S MANUAL  
MAINTENANCE  
DRIVE SPROCKET REMOVAL  
STEP 1 – Prevent the sprocket from rotating by inserting the  
scrench or screwdriver through the holes in the sprocket and  
the hole in the saw body.  
STEP 2 – Loosen the Trantorque® using a 7/8 in box end  
wrench.  
NOTE: Slurry will accumulate inside the Trantorque®  
adaptor while cutting. This can fill expansion spaces  
and make it difficult to remove. To faciliate removal,  
turn the hex nut counterclockwise approximately 1/8  
turn, and then turn it clockwise slightly, so the hexnut  
is loose. Then lightly tap the end of the ring inside the  
hex nut several times with your box wrench. (This will  
loosen the slurry and allow the components to slide for  
removal). Continue to turn the hex nut counterclockwise  
to free the sprocket and Trantorque®.  
DRIVE SPROCKET INSTALLATION  
STEP 1 – Clean the drive shaft and Trantorque® surfaces  
well before installation (Isopropyl alcohol is reccommended,  
to remove grease or hydraulic fluid).  
Note: Do not lubricate Trantorque® or shaft as slippage  
may occur.  
STEP 2 – Slide the Trantorque® shaft adaptor onto drive  
shaft until it bottoms on the shaft. Note: Do not lubricate  
Trantorque® or shaft as slippage may occur.  
STEP 3 – Slide drive sprocket onto the Trantorque® until it  
hits the bottom of the shaft.  
STEP 4 – While holding the sprocket and Trantorque® as  
close to the frame of the saw as possible, finger tighten  
Trantorque® shaft adaptor.  
STEP 5 – Stop the sprocket from rotating by inserting a  
scrench or screwdriver through the holes in the sprocket and  
the hole in the saw body.  
STEP 6 – Tighten the Trantorque® shaft adapter with a torque  
wrench and a 7/8 in socket to 200 in-lbs (22.6 Nm). When a  
torque wrench is not available, use a 7/8 in box end wrench  
and tighten one-half turn past finger tight.  
Note: Do not turn around or reverse the direction of the  
drive sprocket to extend sprocket tooth life. Damage to  
chain or drive links may occur.  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
13  
 
TROUBLESHOOTING  
TROUBLESHOOTING  
853PRO OPERATOR’S MANUAL  
SLOW DIAMOND CHAIN SPEED – Be sure the powerpack is providing the correct hydraulic  
pressure and flow depending on your saw model (8 gpm / 30 lpm or 12 gpm / 45 lpm at  
2,500 psi / 172.5 bar).  
POOR CUTTING SPEED – The diamonds may be glazed over. Make a few cuts in an abrasive  
material such as a cinder block to expose the diamonds.  
PREMATURE CHAIN STRETCH – Not enough water pressure. The minimum water pressure  
is 20 psi (1.5 bar). Insufficient water supply will result in excessive wear on the chain, which can  
lead to loss of strength and chain breakage.  
CHAIN TENSIONER BREAKAGE – Side cover nuts are not tight enough.  
Torque to 20 ft-lbs (27 Nm).  
WATER NOT FLOWING – Water hose is kinked or supply is not turned on.  
MOTOR WON'T TURN – Hydraulics are hooked up backwards or powerpack is set on reverse  
flow.  
Further questions?  
Call 800.321.1240  
or  
visit our website at:  
icsbestway.com  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
14  
 
853PRO OPERATOR’S MANUAL  
APPROXIMATE CUTTING RATES  
REFERENCE  
Material  
Cutting Rate  
Concrete – 6 in (15 cm)  
Red Brick – 6 in (15 cm)  
Rebar – #4 (12 mm)  
5 lineal in/min (12 cm/min)  
10 lineal in/min (25 cm/min)  
10–20 seconds through each piece  
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 = 1 m2  
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 numbers  
8 in x 20 ft = 160 in-ft  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
15  
 
REFERENCE  
853PRO OPERATOR’S MANUAL  
PERFORMANCE LOSS VS. HYDRAULIC HOSE LENGTH  
ASSUMPTIONS:  
• 8 gpm (30 lpm) or 12 gpm (45 l/min) flow at 2,500 psi (172.5 bar)  
• Zero elevation change  
• 2 pairs of flush-face fittings per hose  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
16  
 
 
853PRO OPERATOR'S MANUAL  
ICS, Blount Inc.  
4909 SE International Way  
Portland, OR 97222  
Tel 800.321.1240 Fax 503.653.4393  
icsbestway.com  
© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904  
 

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