ICS SoftPRO-25 Diamond Chain. P/N 74700

A properly tensioned chain will optimize cutting performance. The tensioning rule of thumb for a
concrete cutting chain saw is: "A properly tensioned diamond chain must not be "bowstring
tight" and can be pulled freely around the guide bar by hand easily without binding.

PROPER CHAIN TENSION

Soft

PRO

-25 P/N

4700

If the chain is too loose, it could come off the bar, or it will

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.

How To Check

oft

PRO

-25 P/N

4700

Tension

efore cutting, check for proper tension by pulling the chain

around the bar by

hand. If you cannot easily pull it by hand the

chain is too tight and needs to be

loosened.

hen

Tension

oft

PRO

-25 P/N

4700

ll chains have a tendency to stretch when used. Diamond

chains stretch

more than wood cutting chains because of the

abrasive materials they are

cutting. When a chain stretches to

a point where the drive links are hanging

approximately 1/2" -

3/4" (12-18mm) below the bar, it's time to tension the

chain.

Tension

oft

PRO

-25 P/N

4700

o tension the chain, first loosen the side cove rnuts, then

while holding the

nose of the bar up, use a screw driver to

turn the tensioning screw clockwise

until the chain drive links

hanging below the bar are just beginning to enter the

bar

groove. Continue to hold up the nose of the bar and firmly

tighten the side

cover nuts, (20-ft-lbs, 27Nm).

And remember, it's the side cover nuts that

hold the bar in position.

How to tension the diamond chains on your SoftPRO-25 (P/N 74700).

Prevent Chain Tensioner Breakage

with

oft

PRO

-25 P/N

4700

o not attempt to adjust the tensioner without first loosening the side cover nuts. Do not use the saw

without

making sure the side cover nuts are tight. If the side cover nuts are not tight, the bar can slip

backwards during

cutting and break the tensioner pin..

dditional Information

about

oft

PRO

-25 P/N

4700

oncrete cutting chainsaws operate with looser chain

tension than wood

chainsaws.

It is common especially on

gas powered, concrete cutting

chainsaws to have the drive

links hang completely out of the bar.

Wood cutting

chainsaws use oil to lubricate the chain. The oil makes the

chain very slippery and allows the drive links to fully nest

between the teeth of

the drive sprocket. Concrete cutting

chainsaws require water for cooling and

Additional information about tensiong chains on your ICS SoftPRO-25 (P/N 74700).

flushing the cut.

Water is not as good as oil as a lubricant. Also, there are

concrete particles mixed in with the

water. As

a result,

sometimes the drive links do not nest properly on the drive

sprocket

. When this

happens,

the chain acts like it got

tighter.

There may seem to be "tight" spots and "loose"

spots

as you

pull the

chain around the bar.

If you tension

when the chain is in one of the loose spots, it will be tight at

some point in it's rotation around the bar. Rotating the

chain completely around the bar by hand will

let you know

you have the chain properly tensioned.

dditional

ensioning Tips

for the

oft

PRO

-25 P/N

4700

To reduce chain stretch and tensioning downtime, use 20 PSI (1.4 bar) or greater water
pressure.
Oil the chain at the end of the day to prevent rust but be careful not to over tension in this
condition.
When pulling the chain around the bar by hand, be careful not to touch the bar with thumb
or forefinger. The bar rails can be very sharp. Grab only the diamond segments to pull
the chain.
Always pull the chain away from the Wallwalker. The point of the Wallwalker can also be
very sharp.
Always turn the engine off before tensioning the chain.