GROVE 11-47
CD3340B/YB4411 STRUCTURAL
11
Published 04/07/2015 Control # 569-00
NOTICE!
Failure to replace brake springs as a set may result in
uneven brake application pressure and repeated brake
spring failure.
Assembly
1. Begin assembly by placing the motor support on the
workbench with motor mounting surface down. Install
new O-ring and brake-up ring (Figure 11-114).
2. Insert first, a steel brake disc followed by a friction disc.
Then, alternate steel friction discs until seven (7) friction
and eight (8) steel discs have been installed
(Figure 11-115). Finish with a steel brake disc on top.
IMPORTANT!
It is good practice to pre-lubricate the discs in a light
motor oil prior to assembly.
3. Install the brake spacer on top of the last steel brake disc
(Figure 11-115).
4. To check brake stack height, place a pressure plate on
top of brake spacer. Hold pressure plate down firmly by
hand and measure the clearance in three places
between the motor support and the pressure plate
(Figure 11-117). Average gap must measure between 4
mm (0.153 in) maximum and 2 mm (0.80 in) minimum. If
the gap exceeds the maximum limit, there are too many
brake discs in the stack-up, or the brake discs are
distorted. If the gap is less than the minimum, there are
too few discs in the stack-up, or the discs are worn out. If
the stack-up height is correct, remove pressure plate
and continue with assembly.
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