New York Codes, Rules and Regulations › Title 15 - Department of Motor Vehicles › Chapter I - REGULATIONS OF THE COMMISSIONER › Subchapter F - BUSINESSES REQUIRING LICENSES › Part 79 - Motor Vehicle Inspection › Section 79.23 - Medium duty vehicles

Current through Register Vol. 46, No. 28, July 10, 2024
This section contains additional requirements for the
					 inspection of vehicles with maximum gross weights over 10,000 pounds up to and
					 including 18,000 pounds, which shall be known as medium duty vehicles but not
					 including those vehicles for which the registrants request heavy vehicle
					 inspection. The vehicles subject to inspection under this section are also
					 subject to procedures found in section
					 79.21  of this Part, in addition to
					 the following:
(a)
Brake
				  system.
Procedure
Reject
								  if:
1.
Brake equalization. Each vehicle shall be tested for
								brake equalization before and after a wheel is pulled. This test must be done
								on a hard level surface, free from loose material (indoors and outdoors), or on
								a brake equalization machine. At least one rearmost factory-equipped axle brake
								drum or hub and drum assembly must be removed unless the brake backing plate is
								designed to allow the inspection of all brake lining thickness and drum
								condition. It is not necessary to remove a front wheel. If disassembly is not
								required, the second brake equalization test may be omitted.
1.
The vehicle fails to stop without significant
								pull.
Visually inspect the brake system.
2.
Determine how the brakes are applied (parking and
								service).
2.
There are not two separate means of brake application
								or these two separate means of applying the service and parking brakes are
								connected in any way, so that failure on any one part leaves the vehicle
								without brakes. The parking brake operating control is not separate from the
								service brake control.
3.
Inspect for presence of brakes on all wheels.
3.
There are missing or inoperative brakes on any wheel
								except for the following:
1980 or older trucks and tractors which have three or
								more factory-equipped axles, in some cases, may not have brakes on the front
								axle. These vehicles should not be rejected unless there is evidence that front
								brakes existed (
i.e.,
drums or backing plate assemblies are
								present).
4.
Inspect for a single pedal capable of operating all
								the brakes, if vehicle is designated as a 1954 or newer model.
4.
The vehicle is not equipped with a single brake pedal
								or the pedal does not operate all the service brakes on the motor vehicle or
								combination of vehicles. (This does not prohibit the use of an additional valve
								to operate the trailer brakes independently.)
5.
Inspect all brake hoses, tubes and connecting lines.
								Look for proper support. Be sure lines are secure and cannot chafe on the
								frame, axles, exhaust system or other lines.
5.
There is a break, crimp or crack in any brake hose,
								line, tube or connection. Any line is not secured or is chafed by moving parts
								or in contact with the exhaust system.
Linings and
								  Pads
6.
Inspect for any broken or cracked drum brake linings
								or disc brake pads or parts of linings or pads which are not firmly attached.
								Also inspect for contamination and excessively uneven lining wear.
6.
Friction material is broken, cracked or not firmly
								and completely attached, or if friction surface is contaminated with oil,
								grease, etc., or, if there is metal-to-metal contact or if the disc brake pad
								wear sensor is activated.
7.
Bonded drum linings. Measure the lining thickness at
								the thinnest point.
7.
Thinnest point is less than [ 3.
8.
Bolted or riveted drum linings. Inspect for loose or
								missing bolts or rivets. Measure lining's thickness.
8.
Any rivets or bolts are loose or missing.
Lining is worn to less than 
								1/323
								above a rivet or bolt head if bolt is less than 
								3/8"
								diameter. If lining is secured to the shoe with 
								3/8
								diameter bolt, minimum lining thickness must not be less than 
								5/16".
								Measurements should be taken at a point nearest the center of the shoe.
Drums and
								  Rotors
9.
Discs-Inspect discs for mechanical damage and cracks
								extending to the edge.
9.
The disc is broken or has cracks on the friction
								surface extending to the open edge or if the mounting holes are elongated.
								(Heat check cracks not extending to the open edge may be ignored.)
10.
Drums-Inspect friction surface for cracks extending
								to the open edge or drum or if it has mechanical damage other than normal wear
								or the surface is contaminated.
10.
Drum has a crack on the friction surface extending to
								the open edge or on the outside of the drum, particularly at the drum mounting
								area. (Heat check cracks not extending to the open edge may be ignored.)
There is evidence of mechanical damage other than
								normal wear, or the mounting holes are elongated or the friction surface is
								contaminated with grease, oil, etc.
Hydraulic Brake
								  Systems
11.
Inspect wheel cylinders, lines, connections and
								calipers for visible leakage.
11.
Wheel cylinders, lines or calipers have visible
								leaks.
12.
Inspect master cylinder for leakage and reservoir
								fluid level.
12.
Master cylinder leaks or reservoir is not full to its
								designed capacity.
13.
Test pedal reserve. While vehicle is stopped, depress
								brake pedal under normal foot pressure (if vehicle is equipped with power
								brakes, engine should be running for this test). Also, inspect for leakage
								under pressure.
13.
Pedal reserve is less than S of the possible travel
								or manufacturer's specifications; brake pedal does not hold its position for at
								least 60 seconds without dropping; leaks are visible.
14.
Power-assisted systems. With engine off, apply brakes
								several times to deplete reserve supply.
14.
Pedal does not drop slightly when engine starts.
Put foot on pedal and start engine.
Air Brake
								  Systems
15.
Inspect lines, valves, fittings and air chambers for
								leaks.
15.
If the air pressure does not maintain between 80 and
								90 psi. (perform this test for 1 minute on single and/or combination
								vehicles).
Note:
The following four conditions
								must be met before performing this test:
-governor is cut in; -reservoir pressure is between
								80 and 90 psi; -engine is at idle; and -service brakes are fully applied.
16.
Inspect air pressure safety relief valve, tension and
								condition of compressor drive belts; check air intake cleaner.
16.
Air pressure safety relief is not present or does not
								operate on systems which can be checked. (Some valves are designed with a lead
								plug which cannot be tested.)
Compressor drive belt(s) are missing, badly worn,
								frayed or loose.
Air compressor intake is clogged to the point of
								preventing proper air intake.
17.
Air and vacuum warning system gauges- make a series
								of brake applications until low pressure warning signal operates.
17.
Gauge is missing or inoperative. Vehicle is not
								equipped with either an audible or visible warning device to readily indicate
								to the driver the lack of sufficient assist to stop the vehicle. (a gauge does
								not satisfy this requirement.)
Air System:
Warning system does not provide a continuous warning
								once activated or does not activate when pressure drops:
(i) to manufacturer's specifications, if known,
								or
(ii) below 60 pounds per square inch (42.4 kg/sq cm),
								if manufacturer's specifications are unknown.
Vacuum System:
Warning system does not activate when the vacuum
								reservoir has less than eight inches of mercury.
18.
Inspect for presence of an emergency breakaway system
								on all trailers.
18.
Trailer is not equipped with breakaway brakes which
								automatically apply upon separation from the towing vehicle.
19.
Inspect for presence of a tractor protection valve on
								towing vehicles manufactured after June 30, 1953.
19.
Vehicle is not equipped with an automatic breakaway
								system (tractor protection valve) so that the service brakes on the truck or
								tractor can still operate if the trailer separates. This valve must
								automatically operate within a pressure range of 20-45 psi (14.1-31.8 kg/sq
								cm). Where manual operation is permitted, this control shall be within easy
								reach of the driver.
(b)
Coupling devices.
Procedure
Reject
								  if:
1.
Pintle hooks
A. Condition
-Cracks anywhere in pintle hooks assembly
-Any welded repairs to the pintle hook
-Section reduction visible when coupled (see Note
								1)
Note 1:
No part of the
								horn or hook (stationary part) should have any section reduced by more than 20
								percent. If wear can be seen when the hook and eye are coupled, it is due to
								either this condition or the eye condition described in Note 2.
B. Operation
Latch does not work
2.
Drawbar/towbar eye
A. Condition
-Any cracks in attachment welds
i. Mounting
-Any missing or ineffective fasteners
ii. Integrity
-Any cracks
-Section reduction visible when coupled (see Note
								2)
Note 2:
The eye should
								not be worn to beyond 20 percent of its original cross section thickness. If
								wear can be seen when the hook and eye are coupled, it is probable that either
								this condition or that described in Note 1 exists.
3.
Drawbar/towbar tongue
A. Condition
A. Any cracks.
B. Operation
B. Movement of 1/4 inch or more between subframe
								and drawbar at point of attachment.
4.
Safety chains and cable
A. Presence of safety chains
A. Missing
B. Condition
(i) Chains and hooks
-Worn to the extent of a measurable reduction in link
								cross section.
-Incapable of secure attachment.
-Improper repairs, including welding, wire, small
								bolts, rope and tape.
(ii) Cable
-Kinked or broken cable strands.
-Incapable of secure attachment.
-Improper clamps or clamping.
(c)
Exhaust system.
Procedure
Reject
								  if:
Exhaust system.
1.
Visually inspect for presence, condition and location
								of exhaust system.
1.
Vehicle has no muffler, exhaust pipe, tail pipe or
								tail spout. Vehicle has gutted, altered or patched muffler.
Vehicle has exhaust noise appreciably greater than
								mechanical noise of fan and valves.
There is excessive vibration of exhaust line.
There is leakage of exhaust gases at:
a. Manifold gasket.
b. Manifold and exhaust pipe gaskets.
c. Muffler and muffler connection.
d. Any point in exhaust pipe and tail pipe.
Exhaust system is so located as would be likely to
								result in burning, charring or damaging the electric wiring, fuel supply or any
								combustible part of the vehicle.
Exhaust system does not discharge to the atmosphere
								at a location to the rear of the cab (if the exhaust projects above the cab, it
								must be near the rear of the cab). Motor vehicles engaged in the transportation
								of inflammable liquids are excluded from the requirements of this
								provision.