Bosch 0 607 453 4 Series Original Instructions Manual page 25

OBJ_BUCH-1585-005.book Page 25 Thursday, October 20, 2016 6:49 PM
Start with low setting values.
– Remove the adjustment tool 20 and turn the protective
sleeve until it can be felt to engage.
Note: For soft screwdriving applications, the safety clutch
does not disengage for low torque settings.
Adjusting the Torque without Unscrewing the Housing
(see figure G)
0 607 461 4..
– Insert an Allen key (6 mm or 1/4") into the tool holder 1
and turn it until a small slot in the clutch 24 becomes visi-
ble in the opening of the housing sleeve 2.
Note: Do not mistake the slot with the flat side of the round
nut 22.
– Insert the locking hook 23 into the slot and lock the clutch
24.
– Turn the clutch with help of the Allen key.
Turning in the clockwise direction results in a higher torque, in
the counterclockwise direction, a lower torque.
Start with low setting values.
– Remove the Allen key and the locking hook.
Note: For soft screwdriving applications, the safety clutch
does not disengage for low torque settings.
Adjusting the Torque by Unscrewing the Housing
(see figure H)
0 607 461 4..
– Unscrew the housing sleeve 2 (left-hand thread!).
– Pull the clutch 24 off.
Note: Pay attention that the valve pins do not fall out.
– Clamp an Allen key (10 mm) into a vice and insert the Allen
key into the coupling shaft.
– Turn the round nut 22 using an open-end spanner (size
24 mm).
Turning in the clockwise direction results in a higher torque, in
the counterclockwise direction, a lower torque.
Start with low setting values.
– Reassemble the pneumatic tool in reverse order.
Note: For soft screwdriving applications, the safety clutch
does not disengage for low torque settings.
After Setting the Torque
– Adapt the torque to the respective screwdriving applica-
tion (hard, medium, soft) through practical testing.
– Check the torque with an electronic torque measuring de-
vice or a torque wrench.
Working Advice
Sudden loads cause a sharp drop in speed or a complete stop,
yet do not cause damage to the motor.
Replacing the Clutch Spring (see figure I)
0 607 453 4..
If torques other than those specified in the technical data are
to be used, then the clutch spring 30 can be changed.
– Unscrew the housing sleeve 2 (left-hand thread!).
– Remove the snap ring 25 with snap-ring pliers.
Bosch Power Tools
– Remove the support ring 26 as well as the spring 27 and
the clamping bushing 28 of the quick-change chuck.
– Remove the ball 31 and the O-ring 29.
– Pull the clutch 24 out of the housing 2 and remove the se-
curing ring 32.
– Insert the adjustment tool 20 into the recess of the adjust-
ment disc 21 and turn it leftward until the installed clutch
spring 30 is completely released and can be removed.
– Replace the installed clutch spring 30 with a new one.
– Reassemble the pneumatic tool in reverse order.
– Set the torque.
Start with low setting values.
Maintenance and Service
Maintenance and Cleaning
 Have maintenance and repair work carried out only
through qualified persons. This will ensure that the safe-
ty of the pneumatic tool is maintained.
An authorized Bosch after-sales service agent will carry out
this work quickly and reliably.
Use only original Bosch spare parts.
Regular Cleaning
– Clean the sieve at the air intake of the pneumatic tool regu-
larly. For this, unscrew the hose fitting 7 and remove any
dust and debris from the sieve. Afterwards, retighten the
hose fitting again.
– Water and debris particles in the compressed air cause
rust and lead to wear of plates, valves etc. To prevent this,
fill several drops of engine oil into the air intake 6. Recon-
nect the pneumatic tool to the air supply (see "Connecting
the Air Supply", page 23) and run it for 5–10 seconds,
while catching/picking up the escaping oil with a cloth. Al-
ways carry out this procedure when not using the pneu-
matic tool for a longer period of time.
Scheduled Maintenance
– Clean the gearbox after the first 150 running hours using a
mild solvent. Follow the solvent manufacturers directions
for use and disposal. Lubricate the gearbox using Bosch
gearbox lube. Repeat the lubrication procedure every
300 hours after the initial gearbox service.
Special gearbox grease (225 ml)
Article number 3 605 430 009
– The motor plates should be checked regularly by special-
ised personnel and replaced, if required.
– Relubricate moving parts of the clutch with a few drops of
SAE 10/SAE 20 engine oil after approx. 100,000 screw-
driving applications; relubricate sliding and rolling parts
with Molykote grease. Afterwards, check the clutch set-
ting.
– After each service, check the speed with a speed-measur-
ing device and check the pneumatic tool for increased vi-
brations.
Lubricating the Pneumatic Tool
For direct lubrication of the pneumatic tool or admixtures to
the service unit, use SAE 10 or SAE 20 engine oil.
1 609 92A 37M | (20.10.16)
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