Bosch 1678 User Manual download pdf (Page 12)

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Service

Preventive maintenance

performed by unauthorized

personnel may result in misplacing of

internal wires and components which

could cause serious hazard. We

recommend that all tool service be performed

by a Bosch Factory Service Center or

Authorized Bosch Service Station.

TOOL LUBRICATION

Your Bosch tool has been properly lubricated

and is ready to use. However it is

recommended that the gears be relubricated

only with Bosch lubricant: WD7LUB or Skil

80111.

Always check the

oil level before

using the saw. To

check and add oil:

Remove plug from

power source and

place the saw’s foot on a horizontal surface.

Remove oil plug using the same wrench used

to remove the saw blade. The oil level should

never be below bottom threads in the housing.

When adding oil, fill until oil starts to run out of

oil hole at arrow on housing and replace oil

plug.

NOTE: If oil is extra dirty or thick, replace the

plug and run the saw for one minute to warm

up the oil. Then remove oil plug and turn saw

upside down, to remove all oil. Fill housing

with kerosene. Replace plug and run for one

minute to flush out the gear housing. Drain out

the kerosene and add fresh Bosch lubricant.

With a new saw, change the oil after the first

ten hours of use.

CARBON BRUSHES

The brushes and commutator in your tool

have been engineered for many hours of

dependable service. To maintain peak

efficiency of the motor, we recommend every

two to six months the brushes be examined.

The brushes should be free from dust and dirt.

Brushes should be replaced when they have

worn down to 3/16" in length. The brushes

should slide freely in and out of the holders

without sticking.

To check brushes: Disconnect plug from

power source. Unscrew the brush caps on the

motor housing and lift out the brushes; note

which way they face, so that the brushes can

be returned to their original position. Clean the

brush holder openings with compressed air or

a clean cloth and replace the brushes and

caps.

Only genuine Bosch replacement brushes

specially designed for your tool should be

used.

BEARINGS

After about 300-400 hours of operation, or at

every second brush change, the bearings

should be replaced at Bosch Factory Service

Center or Authorized Bosch Service Station.

Bearings which become noisy (due to heavy

load or very abrasive material cutting) should

be replaced at once to avoid overheating or

motor failure.

Cleaning

To avoid accidents always

disconnect the tool from

the power supply before cleaning or

performing any maintenance. The tool may

be cleaned most effectively with compressed

dry air. Always wear safety goggles when

cleaning tools with compressed air.

Ventilation openings and switch levers must

be kept clean and free of foreign matter. Do

not attempt to clean by inserting pointed

objects through openings.

Certain cleaning agents

and solvents damage

plastic parts. Some of these are: gasoline,

carbon tetrachloride, chlorinated cleaning

solvents, ammonia and household detergents

that contain ammonia.

CARE OF BLADES

Blades become dull even from cutting regular

lumber. If you find yourself forcing the saw

forward to cut instead of just guiding it

through the cut, chances are the blade is dull

or coated with wood pitch.

When cleaning gum and wood pitch from

blade, unplug the saw and remove the blade.

Remember, blades are designed to cut, so

handle carefully. Wipe the blade with

kerosene or similar solvent to remove the gum

and pitch. Unless you are experienced in

sharpening blades, we recommend you do

not try.

WARNING

Maintenance

CAUTION

OIL

PLUG

OIL

LEVEL

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Bosch 1678 User Manual Page 12

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