GROVE 9-7
CD3340B/YB4411 BRAKE SYSTEM
Published 04/07/2015 Control # 569-00
7. Reconnect all brake lines and bleed the brake system as
recommended on page 9-4.
SERVICE BRAKE REPAIR
Refer to Front Drive Axle Repair, in Section 8.
PARKING BRAKE REPAIR
Lining Kit Replacement
NOTE: The new linings must be kept free of grease, oil,
etc.
The lining kit is indicated in Figure 9-10 with a symbol.
1. Close the needle valve located under the accumulator
(Figure 9-7). This will shut off accumulator hydraulic
pressure to the parking brake. Release system pressure
by actuating the service brake pedal until no resistance
is felt. Then, engage and disengage the parking brake to
release its pressure.
2. Slowly, loosen the hydraulic hose from the parking
brake. Some pressure may still be present in the
hydraulic hose. Let the pressure escape and then
remove the hydraulic hose.
3. Cap the hydraulic hose to prevent contamination from
entering the hydraulic system.
4. Loosen lock nut (8, Figure 9-10) and back off adjusting
bolt (7).
5. Remove the bolts and nuts used to fasten the brake
mounting bracket assembly to the crane. Remove the
parking brake.
6. Separate the mounting bracket assembly (31,
Figure 9-10) from the brake.
7. Clamp the brake in a vice with soft jaws with the
clearance slot facing straight up.
NOTE: Clamping should be done on sides of the brake, not
on machined surfaces.
8. Remove two screws (27) through access holes in
housing (26). Using a thin blade tool, pry lining (25) from
housing (26) and remove the lining and two bushings
(24) through the disc clearance slot.
9. Rotate lining assembly (22) until screws (21) are aligned
with the access holes in housing (26), see Figure 9-10.
Remove the two flat head screws (21). Pry lining (20)
from piston (19) and remove the lining through the disc
clearance slot.
10. Install new lining (20) into piston (19) through the disc
clearance slot. Install new flat head screws (21) and
tighten to a torque of 3.4-4.5 Nm (30-40 lb-in).
11. Insert new bushings (24) into new lining (25). Install the
new lining into housing (26) through the disc clearance
slot. Line up the holes with the housing and fasten with
two new screws (27). Tighten to a torque of 2.5-3.2 Nm
(22-28 lb-in).
12. Assemble the brake assembly onto mounting bracket
(31). Install the parking brake assembly onto the frame
of the crane. Attach the hydraulic hose.
13. Adjust the lining clearance as described on page 9-5.
14. Open the accumulator needle valve and then bleed air
from the system as described on page 9-4.
WARNING
Before replacing the parking brake linings, make sure that
the machine is on level ground. Place chocks on both
sides of the four tires. Remove the ignition key. If these
precautions are not adhered to, the crane could run over
you while performing the replacement.
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