♦
Perform work while outside the open cutter jaws,
not between them.
♦
Disconnect the hydraulic supply to the hydraulic
demolition cutter by shutting the shut-off valves of
the lines
»Open hydraulic demolition cutter«
(Connection
»A«
) and
»Close hydraulic
demolition cutter«
(Connection
»B«
) at the boom.
♦
Secure the carrier such that it cannot move
unexpectedly.
♦
Loosen the Allen screws (D) with an Allen key.
♦
Unscrew the Allen screws (D) a few turns.
WARNING Metal chips shooting off
The cutter blades are made of hardened steel. When
removing the cutter blades with a hammer, chips
may shoot off and cause serious eye injuries.
►
Wear safety glasses when hammering out the
cutter blades.
►
A copper mandrel must be used for hammering.
♦
Drive the cutter blade (B) out by hitting a copper
mandrel on the heads of the Allen screws (D).
♦
Screw the Allen screws (D) out completely and
remove the pair of lock washers (E).
♦
Lever the cutter blade (B) out of the blade seat
using a screw driver or thin chisel.
♦
Remove the shims (F).
♦
Remove the lock rings (C) with pliers.
♦
Check the blade seat of the cutter jaw and the lock
rings (C).
E
D
F
C
B
A
Checking the blade seat
The blade seat should not have any severe damage
since this means the support of the cutter blade (B)
is not ensured. Damage to the blade seat may lead
to fracture of the cutter blade (B).
♦
Have the damaged blade seat welded by a
qualified welder and then returned to its original
form using mechanical finishing.
Checking cutter blades
If you turn the cutter blade (B), the surfaces
contacting the blade seat should not have any major
unevenness. Unevenness causes damage to the
blade seat.
♦
Change the cutter blade (B) if the contact surface
(A) is damaged or if the cutter blade (B) has other
damage.
♦
Turn the cutter blade (B) if the cutting edge is worn
and the contact surface is undamaged.
♦
Replace damaged Allen screws (D), pairs of lock
washers (E) and lock rings (C).
Fitting cutter blades
If the inspection of the blade seat does not show any
defects or if it has been reworked, fitting of the cutter
blade (B) can begin.
♦
Clean the blade seat.
♦
Fit the lock rings (C).
♦
Insert the cutter blade (B).
♦
Place one pair of lock washers (E) on each Allen
screw (D).
♦
Tighten the Allen screws (D) to the torque required
(see chapter
Bolt connections/Tightening torques
).
♦
Turn the hydraulic demolition cutter to the other
side to turn or change the other cutter blade. Thus
you can avoid being between the open cutter jaws.
♦
Open the shut-off valves of the lines
»Open
hydraulic demolition cutter«
(Connection
»A«
)
and
»Close hydraulic demolition cutter«
(Connection
»B«
) at the boom.
♦
Lift the hydraulic demolition cutter using the carrier.
♦
Turn the hydraulic demolition cutter 180°.
♦
Place the hydraulic demolition cutter horizontal on
the ground.
♦
Work through all the steps as previously described
in this chapter and observe the safety instructions.
© 2015 Construction Tools GmbH | No. 3390 5141 01 | 2015-11-16
Original instructions
48
CC 1700 U, 1700 S
MAINTENANCE
