Blount Chainsaw 853PRO User Manual

853PRO Hydraulic Saw

OPERATOR’S MANUAL

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

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.

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.

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)

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

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.

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).

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.

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.

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.

853PRO OPERATOR’S MANUAL

MAINTTIETLNEANCE

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.

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

visit our website at:

icsbestway.com

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

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

853PRO OPERATOR'S MANUAL

ICS, Blount Inc.

4909 SE International Way

Portland, OR 97222

Tel 800.321.1240 Fax 503.653.4393

icsbestway.com

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