JLG SSV10 Service Manual - Manual (Page 42)

SECTION 3 - BASE COMPONENTS
3-14 – JLG Lift – 3121187
Brake Assembly Removal From Motor
1. Elevate the platform to gain access to the drive
motor covers.
2. Remove the drive motor cover. (See Drive Motor
Cover - Installation on Page 3-3).
3. Remove the drive wheel. (See (Rear) Drive Motor
Wheel - Installation on Page 3-4).
4. Disconnect the drive motor/brake power connector
from it’s wiring harness connector.
5. Remove the drive motor. (See Drive Motor Assembly
- Removal on Page 3-11).
6. Loosen the boot clamp, and slide the protective rub-
ber boot off the end of the drive motor housing
exposing the brake assembly.
7. Remove the four (4) hex cap screws securing the
brake assembly to the end of the drive motor hous-
ing and remove the brake assembly from the end of
the drive motor.
Brake Operation
When the magnetic coil is not energized (brake on), the
armature plate is pushed away from the magnetic coil sur-
face by heavy springs internally mounted in the magnetic
coil housing. This pressure forces the armature plate
against the friction brake disk holding it tight between the
armature plate and the mounting plate. The internally
splined friction brake pad is mated to an externally splined
gear on the drive motor armature shaft. The brake is not
released until the magnetic coil is energized pulling the
armature plate away from the friction brake disk.
A correctly adjusted brake will ideally have a measure-
ment of approximately .006" (but will operate normally at
.004" to .010") between the armature plate and magnetic
coil housing surface when the brakes are ENGAGED
(brakes on).
Never allow any type of lubricant (oil, grease, hydraulic
fluid, etc.) to come in contact with the brake friction disk or
it’s contacting surfaces. Also if the brake becomes
clogged with debris or dirt the brake may not release
properly.
Brake Removal
1. Round Hex Screws
2. Brake Assembly 3. Brake Power Leads
4. Motor Shaft to Brake Disc
Spline Gear
Figure 3-2. Brake Assembly Components
1. Magnetic Coil Housing 5. Plate Springs
2. Armature Plate 6. Shim Washers
3. Friction Brake Disk 7. Spacer
4. Mounting Plate 8. Mounting Plate Screws
3
2
7
8
5
6
4