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When unpacking, make sure that all of the
standard equipment is present and that
there is no transportation damage.
Before preforming any work on the
machine itself, disconnect the power
plug.
CASTERS
1.The front casters are equipped with
brakes.
2. To actuate the castor brake, press the
lever downwards.
3. To deactivate, lift up.
ATTACHING THE REAR WHEELS
1.Place one axle cap-and-pin assembly
onto end of axle.
2. Hammer pin into cap until the top of the
pin is flush with the top of the cap.
3. Slide one wheel onto the axle, slide axle
through the canister, then slide second
wheel onto axle as shown in figure 2.
4. Turn canister on its side. So as to provide
support during step 5, place small block
of wood or stack of quarters under the
already-capped end of the axle
5. Place second axle cap-and-pin assembly
onto end open of axle.
6. Hammer pin into cap until the top of the
pin is flush with the top of the cap.
ASSEMBLING THE MAIN HANDLE
The vacuum cleaner can be moved easily
with the main handle. Always move the unit
using both hands. Insert the handle into the
two openings and fasten with the two handle
clamps.
ATTACHING THE VACUUM HOSE
Connect the 35-mm vacuum hose (standard
equipment) onto the 3931’s hose port by
sliding the wider end of the hose onto the
port then turning it to the right slightly to lock
it in place.
The 35-mm hose can be connected to
optional accessories, including the Bosch
VAC011 wand kit and the dust extraction
hoods on various power tools, including
Bosch routers, planers and grinder hoods.
The 3931’s universal hose port also accept
many other vacuum hoses, including most
1-1/4” hoses, 1-1/2” hoses, 2-1/2” hoses
and other Bosch hoses. (See Accessories,
page 13)
Assembly & Preparation
CANISTER LATCH
CANISTER
HANDLE OPENING
HOSE PORT
VACUUM
HOSE
DUST BAG
FIG. 3
AXLE CAP
WHEEL
AXLE
CANISTER
PIN
FIG. 2
BM 2610919254 12/02 12/18/02 10:52 AM Page 6