Harley Davidson (1970 to early 1978) Electra Glide FL/FLH-1200, Super Glide FX/FXE/FXS-1200. Service manual - page 5
3. Scored or grooved brake drums should be
refinished before installing new shoes or linings Brake Drum turning
arbor. Part No. 97280-60A can be used to refinish brake drum inside
diameter on a lathe as necessary to clean up.
4 Use standard size shoe or lining set for brake drums refinished up to
8.040 in. maximum on inside diameter.
5. Use a 030 in. oversize shoe or lining set for brake drums refinished
over 8.060 in. but not more than 8.100 in. maximum on inside diameter.
ASSEMBLING REAR DRUM BRAKE
(Figure 2*64)
1. Assemble rear wheel brakes in reverse order of disassembly except:
Apply a light coat of grease on hold-down springs (5) and spots on side
cover (13) where shoes touch when in operating position.
CAUTION — Front shoes (2) and rear shoe (3) are of different widths.
Narrow shoe must be in rear position and wide shoe in front position.
2. Assemble shoes (2 and 3) to lower return spring (4), position shoe
assembly on plate anchor block at bottom of side cover and install top
spring (1). Short hook is inserted in elongated hole on front shoe.
Reassemble wheel
SIDECAR WHEEL DRUM BRAKE
1. Remove wheel with brake drum as described in 'Wheels.”
2. Procedure for servicing sidecar wheel brake is the same as for rear
wheel brake as given in preceding paragraphs.
DISC BRAKE
OPERATION
NOTE
Two types of calipers are used. The following description applies to
Figure 2-65. Brakes shown in Figures 2-65 and 2-66 operate in a similar
manner.
The front brake master cylinder is an integral part of the brake hand
lever assembly on the right handlebar. The rear brake master cylinder is
located on right side of motorcycle and is operated by a foot pedal. A
hydraulic hose connects the master cylinder to the brake cylinder
located in the outer caliper half. Brake pads in the caliper halves
apply pressure to each side of disc mounted on the wheel hub.
When the brake lever is operated, the hydraulic fluid forces the piston
against the brake pads which contact the disc. The wave spring is
compressed between the backing plate (6) and the adjusting ring. The
press-fit adjusting ring (7) moves as necessary, to take up excess
clearance as friction material wears away. The press-fit adjusting ring
takes up a new position in the cylinder and is now located correctly to
maintain running clearance when brake is released and makes brake
self-adjusting. The action of the wave spring pulls the brake piston
away from the disc to create a small pad-to-disc running clearance Late
1974 and later front calipers do not have a wave spring. Retraction is
accomplished by the piston 0-ring.
