Maintenance; Tooling; Removing The Ffb Brake Motor; Refitting The Ffb Brake Motor - Emerson Leroy-Somer FFB Series Maintenance Manual

4 - CORRECTIVE MAINTENANCE
Before any operation on the brake, always
disconnect the brake motor from its power supply
(Putting in writing).
4.1 - Tooling (not supplied)
Tools Function
Adjustment shims Air gap adjustment
Torque wrench Tightening for assembly of brake parts
Open end, handle, box Removal of the face plate, extension,
wrench (M8/10/16, etc.) yoke, DLRA, DLM, DMD
Screw and unscrew the shaft end
Special socket
extensions
Hub puller Splined ring removal
Bearing puller Bearing change: refer to manual §3.2
Mallet (leather or plastic) Lift the keys from the splined ring
Multimeter Voltage check
Coil resistance measurement, micro-
Ohmmeter (indicator lamp)
contact adjustment
Circlip pliers Circlip removal
VLS assembly jet Gasket fitting
Large flat blade screwdriver Fan removal
2 threaded rods: M5
(FFB1), M6 (FFB2 and 3)
Refitting the armature on yoke
and M8 (FFB4 and 5)
and corresponding nuts
2 large flat blade
Fan removal
screwdrivers
Always record the connections of the supply
wires and options before disconnection.
Similarly, record the position of flanges with
respect to the stator and the fan's direction on the rotor.

4.2 - Removing the FFB brake motor

- Remove the brake motor using appropriate tools.
- Disconnect the brake motor from its supply.
- Open the terminal box, record the wires and their position
(supply of the brake motor, encoder, probes, etc.). Always
record the connections of the supply wires and options before
disconnection.
- Disconnect the supply wires from the motor and brake
supply terminal strips (+ and - terminals).
- Disconnect the rectifier bridge and check the stator isolation
(> 10 MOhms).
24
CORRECTIVE MAINTENANCE
- If the brake is fitted with a DLRA, DLM or DMD system,
unscrew the lever rod(s) (item 1502, 1605).
- Unscrew the cover screws 27, remove the metal cover 13.
- Remove the fan 7 by removing the axial locking circlips 9.
- Extract the fan 7 using two screwdrivers as levers.
- Remove the VLS gasket 1402.
- Unscrew the fixing screws from the yoke 1106.
- Remove the yoke 1105 from the brake, remove the O-ring
1107, extract the armature 1102 while recording its angular
position.
- Remove the brake disc 1101 while recording the assembly
Include sufficient
direction (large hub shoulder on motor side).
distance around the
- Unscrew the fixing screws 1305 from the face plate, then
brake for access and
remove the face plate 1100.
intervention.
- Unscrew the extension 1401 while blocking the drive shaft.
- Remove the circlips 1303.
- Extract the splined ring 1302 using a puller.
- Remove the keys 1301 from the ring.
- Find all the faulty parts to order spare parts. Refer to §2.
• Clean the parts:
• Change the gaskets and bearings. Refer to §2 and 3.

4.3 - Refitting the FFB brake motor

VDI2230.
- Reverse the procedure for refitting: keys 1301, ring 1302,
face plate 1100 (with locating pin: position the outer spigot
opposite the coil cable), brake disc 1101.
- Position the armature 1102 (non through drill hole on one
face located at 9 o'clock with respect to the yoke cable) on
the yoke 1105 fitted with its springs. Screw the two threaded
screws through the yoke into the armature while ensuring it
does not protrude the braking face (slight recess). Press the
armature onto the yoke using two nuts mounted onto the rods
(tighten each rod gradually).
- Install the O-ring 1107 inside its groove between the
armature 1102 and the yoke 1105.
- Mount the yoke and armature onto the face plate using the
fixing screws 1106 (tighten to torque).
- Check that the brake disc turns freely.
- Remove the two threaded rods: the brake disc is blocked.
- Refit the fan 7 and its holding washers 8 and 9.
- Refit the cover 13.
- Refit the control rod of the DLRA, DLM lever(s) if necessary.
If Encoder option: see §6.5
If Forced Ventilation option (VF) + Encoder: refer to §6.6 and
6.5.
- by blowing the electrical parts and the brake parts 1100 to
1108 (no solvents, no humid products);
- using a non greasy degreasing product for mechanical
parts (item 1101 excepted);
- using a scraper for joints.
Clean the bleeding ports and plugs before refitting.
Verify that no pollution distorts item 1105.
Tightening screw according to NF E 25030-1 or
FFB Brake Motors Maintenance Guide
5287 en - 2015.04 / a