Code of Maryland Regulations › Title 11 - DEPARTMENT OF TRANSPORTATION › Subtitle 14 - MOTOR VEHICLE ADMINISTRATION-VEHICLE INSPECTIONS › Chapter 11.14.03 - Safety Standards for Motorcycles › Section 11.14.03.04 - Brakes

Current through Register Vol. 51, No. 14, July 12, 2024
Procedures:
Reject Vehicle If:
A. (1) At a speed of 20 mph on a smooth level, dry
						  surface which is free from loose material, the brakes are required to stop the
						  motorcycle within 30 feet. (2) If vehicle is equipped with both front and rear
						  brakes, determine if there is adequate braking action at both wheels.
A. (1) The motorcycle fails to stop within 30 feet. (2)
						  There is inadequate brake action on either wheel. (3) There is obvious
						  vibration, wobble, or bounce caused by warped brake rotor or brake drum out of
						  round.
B. Mechanical Brake System. Inspect linkage, cables,
						  pivots, and bearings for high friction, wear, and broken or missing parts.
						  Motorcycles manufactured after January 1, 1974, shall have brakes on all
						  wheels. C. Condition of Mechanical Components in Hydraulic or Mechanical
						  Systems. (1) Inspect for worn pins and missing or defective cotter pins.
B. (1) Brake adjustment changes under any steering or
						  loading conditions. (2) Cotter pins are missing. (3) Pins or clevises worn more
						  than 25 percent of the original diameter. (4) The cam operating lever has been
						  repositioned on the shaft as a means of avoiding replacement of worn cam,
						  shoes, or lining.
(2) Inspect for broken or missing springs and worn
						  cables, clevises, couplings, rods, and anchor pins. (3) Inspect for frozen,
						  rusted, inoperative connections, missing spring clips, and defective grease
						  retainers. (4) Inspect pedal shaft and bearings for high friction, wear, and
						  misalignment.
(5) Any cables are frayed (two or more broken strands).
						  (6) Any brake adjustment mechanism which will not maintain an adjusted position
						  or is adjusted to its maximum extent. (7) Front brake cable is routed so as to
						  be pinched between fork and frame.
(5) Inspect for restriction of shoe movement at backing
						  plate and for bind between brake shoes and anchor pins. (6) Inspect actuating
						  cam for excessive wear, camshaft for looseness in backing plate bushing and
						  determine that springs are of sufficient strength to return and hold shoes
						  against cam.
(8) There is any roughness, binding, or jamming in
						  levers or pedals. (9) Less than 1/3 travel remains in hand or foot brake when
						  brakes are applied. (10) Modifications make the pedal inaccessible for adequate
						  leverage or operation. (11) Manufactured after January 1, 1974, and not
						  equipped with brakes on all wheels.
D. Hydraulic System. Motorcycles manufactured after
						  January 1, 1974, shall have brakes on all wheels.
C. (1) Mechanical parts are missing, broken, or badly
						  worn.
(1) Visually inspect condition of hydraulic system.
(2) There is excessive friction in pedal and linkage or
						  in brake components.
(2) Inspect hydraulic hoses and tubes for leaks, cracks,
						  chafing, flattened or restricted sections, and improper support.
(3) Pedal or levers are improperly positioned or
						  misaligned.
(3) Inspect master cylinder for leakage and fluid
						  level.
(4) Grease seals are defective, dripping, or slinging
						  grease.
(4) Inspect master cylinder push rod for improper
						  adjustment. (5) Inspect wheel cylinders or hydraulic brake actuating
						  systems.
D. (1) Hoses or tubing leaks or they are cracked, chafed,
						  flattened, restricted, or are improperly fastened. (2) Master cylinder leaks or
						  the reservoir is less than 1/2 full. (3) There is any leakage in the braking
						  system. (4) The push rod is improperly adjusted. (5) Wheel cylinder or caliper
						  leaks or fails to function. (6) Manufactured after January 1, 1974, and is not
						  equipped with brakes on all wheels.
At least one rear wheel and drum assembly shall be removed
				  (for inspection of linings on vehicles equipped with drum brakes) from a
				  three-wheeled multipurpose vehicle for lining, drum, and component inspection.
				  Removal of a wheel on any other motorcycle shall be required only if any
				  malfunction of braking is discovered during a road test. 1974 and newer
				  motorcycles have a means of inspecting brake lining thickness without removing
				  a wheel.
Procedures:
Reject Vehicle If:
E. Condition of Linings and Pads. (1) Bonded-Measure the
						  lining thickness at the thinnest point.
E. (1) Brake lining wear reference mark indicates unsafe
						  or replacement.
(2) Riveted-Measure lining thickness at thinnest
						  point.
(2) Thinnest point of bonded lining is less than 2/32
						  inch.
(3) Wire-backed-Inspect for wire showing on the friction
						  surface of the lining.
(3) Any rivets are loose or missing. Lining is worn less
						  than 2/32 inch above any rivet head.
(4) All Linings or Pads-Inspect for broken or cracked
						  linings, and parts of linings not firmly attached to shoe. Also inspect for
						  contamination and excessively uneven lining or pad wear. Circumferential head
						  cracks on bonded linings are not reason for rejection if the lining is securely
						  attached to the shoe.
(4) Wire backing is visible on the friction surface. (5)
						  Lining is broken, cracked, or not firmly and completely attached to shoe. (a)
						  Friction surface is contaminated with brake fluid, oil, or grease. (b) Lining
						  wear is extremely uneven.
F. Brake Drums. (1) Inspect condition of the drum
						  friction surface for substantial cracks extending to the open edge of the drum.
						  Short hairline heat cracks should not be considered.
F. (1) There is any substantial crack on the friction
						  surface extending to open edge. Excessive wear (0.060 maximum) over original
						  diameter or in excess of diameter embossed on drum. Grooving exists.
(2) Inspect for cracks on the outside of the drum.
(2) There is any external crack.
(3) Inspect for mechanical damage.
(3) There is evidence of mechanical damage other than
						  wear.
(4) Inspect for contaminated friction surface.
(4) Friction surface is contaminated with oil, grease,
						  or brake fluid.
G. Brake Discs. (1) Inspect for substantial cracks
						  extending to edge of disc.
G. (1) There is any substantial crack extending to the
						  edge. Worn beyond manufacturer's tolerances for replacement.
(2) Inspect for mechanical damage.
(2) There is evidence of mechanical damage other than
						  wear.
(3) Inspect for contaminated friction surface.
(3) Friction surface is contaminated with oil, grease,
						  or brake fluid.