![Manitowoc Grove YB5515-2 Скачать руководство пользователя страница 273](http://html.mh-extra.com/html/manitowoc/grove-yb5515-2/grove-yb5515-2_service-and-maintenance-manual_701236273.webp)
STRUCTURALS
CD5515-2/YB5515-2 SERVICE MANUAL
11-20
Published 1-20-2017, Control# 483-02
cover up as the capscrews are loosened. Remove the
cover from the brake housing.
2.
Remove the springs (24) from the piston and check the
springs for free height. Each spring should measure at
least 30.5 mm (1.20 in) with no force.
3.
To remove the brake piston (10), install two pieces of all-
thread (3/8-16NC) in the bottom of two spring pockets.
4.
Using jam nuts, screw the all-thread pieces in evenly
until the piston is clear of the housing. An alternate way
of removing the piston is to use shop air to slowly
pressurize the brake cavity until the piston is out of the
bore.
5.
Grasp the brake driver/clutch assembly (Items 38, 13,
23, 14, 15 & 17) and remove it from the brake housing.
6.
Remove the stator plates (19) and friction discs (18)
from the brake housing and check for excessive wear.
Be sure to check the top stator plate for scoring caused
by the removal tools and polish if necessary. Friction
discs should measure no less than 1.397 mm (0.055 in)
thickness and stator plates should measure no less than
1.727 mm (0.068 in) thickness.
7.
With a hook wire or pry bar, remove the seal.
8.
Examine the bushing (39) in the brake housing for wear
and replace if necessary.
9.
If brake housing (21) is removed from the hoist, examine
the journal on the brake housing, where the seal (304)
fits, for wear. If severely worn, replace the brake
housing.
10.
Carefully disassemble the brake driver/clutch assembly
noting the direction of lockup for the clutch (34). The
clutch assembly must be re-assembled with the arrow
pointing in the proper direction for the hoist to function
properly. Inspect the outside diameter on the input driver
(38) and inside diameter of the brake driver (13) where
the clutch (34) runs. If there is any pitting or spalling
(flakes of a material that are broken off) on the driver
then it and the clutch must be replaced.
11.
Re-assemble the driver/clutch assembly, making sure
that the clutch is installed properly.
12.
Install a new seal into the brake housing. If the brake
housing is removed from the hoist temporarily install the
input sun gear into the brake housing, and slide the
driver/clutch assembly onto the sun gear spline.
13.
Install the stator plates (19) and friction discs (18) into
the brake housing starting with a stator and alternating
friction discs and stator plates. There is one more stator
plate than friction disc so the last item installed is a stator
plate.
14.
After installation, check the brake stack up to make sure
that the dimensions are within the tolerance shown in
Figure 11-15. If your measurement is greater than
shown, either some friction discs and stator plates have
been left out, or the friction discs are worn beyond
acceptable tolerances. If your measurement is less than
shown, too many plates or discs have been inserted or
they are not seated properly.
15.
Coat the new backup rings and O-rings with light oil and
install onto the piston (10) with the backup rings toward
the outside of the piston. See Figure 11-15 for proper O-
ring and backup ring installation.
16.
Carefully install the piston into the brake housing and
gently tap it down until it is seated.
17.
Install the springs (24) into the spring pockets of the
piston. If working in a horizontal position, coat the
bottom of each spring with chassis lube to keep it in
position.
18.
Coat the new O-ring with light oil and install into the
groove on the brake cover (20).
19.
Install the cover (20) onto the brake housing (21) and
tighten it evenly, alternating between opposite
capscrews. Make sure that the cover is aligned properly
with the brake housing to orient the motor and vent as
they should be.
20.
Check the brake release with a portable hydraulic pump.
Full release should be obtained at 17.24 bar ± 1.38 bar
(250 psi ± 20 psi). Also, check the brake for proper
operation by applying 10.69 bar (155 psi) to the brake
port and adapting a torque wrench to the input shaft. The
torque in the hoist-down, or payout, direction should be
120 to 156 Nm (95 to 115 lb-ft).
10.16 mm ±1.27
(0.400 in ±0.050)
FIGURE 11-15
Reference Only
Содержание Grove YB5515-2
Страница 1: ...Shuttlelift CD5515 2 Grove YB5515 2 Service Maintenance Manual R e f e r e n c e O n l y ...
Страница 2: ...This Page Blank R e f e r e n c e O n l y ...
Страница 12: ...TABLE OF CONTENTS CD5515 2 YB5515 2 SERVICE MANUAL TOC 8 This Page Blank R e f e r e n c e O n l y ...
Страница 292: ...R e f e r e n c e O n l y ...
Страница 293: ...R e f e r e n c e O n l y ...