Deprag 400373 B, Operating Instruction Booklet

Page: 14 / 40

14
6.3. Range and Exchange of Clutch Spring
The torque range of the screwdriver is adjustable. The torque ranges of the color-coded
springs are shown in the table below.
IMPORTANT
You can only use those clutch springs, which are possible for the respective
torque range of the screwdriver.
TYPE 346-237U and 346-737U
Torque Range of the individual clutch spring:
Part No. Wire
∅
Color
Torque "min." Torque "max."
353796 4.0 mm Black appx. 3.5 Nm / 31 in.lbs appx. 8/9 Nm / 71/80 in.lbs
353795 3.2 mm Blue appx. 2.0 Nm / 18 in.lbs appx. 4.4 Nm / 39 in.lbs
All torque values are based on 90-PSI (6.3 bar) air pressure. Torque values are estimated
data which may differ – depending on the type of screw joint.
TYPE 346-337U and 346-437U
Torque Range of the individual clutch spring:
Part No.
Wire
∅ ∅ ∅ ∅
Color Torque "min." Torque "max."
328562 5.6 mm White appx. 10.0 Nm / 89 in.lbs appx. 24.0 Nm / 212 in.lbs
328024 5.0 mm Black appx. 6.0 Nm / 53 in.lbs appx. 18.0 Nm / 159 in.lbs
328025 3.2 mm Blue appx. 3.0 Nm / 27 in.lbs appx. 6.0 Nm / 53 in.lbs
328026 2.5 mm Green appx. 2.0 Nm / 18 in.lbs appx. 4.0 Nm / 35 in.lbs
All torque values are based on 90-PSI (6.3 bar) air pressure. Torque values are
estimated data which may differ – depending on the type of screw joint.
Exchange of Clutch Spring ( Illustration 3)
IMPORTANT
To avoid loosing parts, disassemble the machine only on top of a flat work
surface.
1. Disconnect screwdriver from air supply.
2. Unscrew the clutch bearing 400362 A/B (left-hand thread) complete with the spring
sleeve (Optional Equipment).
3. Take out the clutch complete.
4. For screwdriver type 346-237U/737U: Insert the supplied key 326240 into the half-
round bore of the lock ring and turn the key clockwise, until the adjustment nut comes
off.
For screwdriver type 346-337U/437U: Slide the supplied spanner 805491 (AF 11)
over the hex of the clutch shaft and unscrew the adjustment nut by means of the key
800408 (AF 19) (right-hand thread).
5. Pull off the lock ring.
6. Remove the clutch spring, replace with new clutch spring and reassemble the clutch
in reverse order.
7. Insert the clutch into the clutch bearing.
8. Tighten the clutch bearing complete with the spring sleeve onto the screwdriver (left-
hand thread).