DESCRIPCIÓN DEL INGRESO

7.2.1 Where the trailer is not a wagon registered on the Rolling Stock Library, the trailer shall meet all sections, where relevant, of this document with the following amendments: a) Trailer frame strengths, tow points, couplings and tow bars shall, as a minimum, meet

the maximum coupled loads of total consists (both towing and propelling). The Engineering Acceptance Certificate and the instruction handbook shall show the maximum number and total trailed weight of trailers that the manufacturer specifies can be safely coupled together.

b) The coupling type and height shall be as set out in Appendix J. c) Tow bars shall meet the requirements set out in Appendix J.

d) Except as set out in 7.2.1 e) and o) trailers shall have an air service brake fitted meeting the requirements of 5.6. The parking and service brake system shall be controlled by two separate air lines with brake pipe connection type and position as set out in Appendix H. Two-wheeled trailers and type 0D vehicles as set out in 7.2.2, which are incapable of moving along the track when disconnected from the towing vehicle, are exempt from this requirement. The exemption shall be shown on the Engineering Acceptance Certificate and included in the instruction handbook. e) It is permissible for trailers, designed for towing by vehicles of less than 400 kg GVW,

to have an electric service and parking brake where control on the towing vehicle simultaneously applies a brake on the towing vehicle and each trailer.

f) Trailers with a service brake shall be fitted with labels on either side stating ‘SERVICE BRAKE FITTED’, which shall be clearly visible from a distance of 2 m, or if fitted with a data panels (see Appendix C) the data panel shall be marked with the same phrase. g) The trailer, in both fully laden and unladen condition, shall meet the stopping distances

set out in 5.6.2 if it breaks away from the vehicle.

h) There is no requirement for two separate and independent braking systems, but the parking brake shall meet the requirements of 5.6.5 and 5.19.2.9.

i) The brake pressure range for each braking system shall be displayed adjacent to the brake pipework on the trailer headstock in letters / figures that are clearly legible from a distance of 2 m.

j) Where a trailer has a three point suspension system the stable load carrying area shall be clearly and permanently marked on the floor of the trailer. The method of loading the trailer shall be included in the instruction handbook.

k) The trailer shall clearly display its tare weight, gross weight and carrying capacity, details of which shall be shown on the Engineering Acceptance Certificate and included in the instruction handbook. It is permissible to amend suitably the data panels, where fitted (see Appendix C).

l) Trailers shall have one space suitable to display the date of the next maintenance brake test due in characters that are clearly visible from a distance of 2 m.

m) Trailers greater than 0.5 t tare weight shall be capable of displaying two white marker lights only at the front when being propelled and two red tail lights only at the rear when being towed. They shall also be capable of displaying two red tail lights at each end when detached from a towing vehicle and left on rail. Trailers that cannot be coupled in multiple, and are 0.5 t or less, are permitted to have lamp irons, or some other suitable means of attaching the lights as set out in 5.14.1.7.

n) Except where an operating or driving position is fitted, headlights and horns are not required.

o) It is permissible for attachments with two or more rail wheels not to be fitted with an air service brake system, where they fulfil all the following requirements:

i) They are non load carrying attachments.

ii) They are incapable of being coupled to any other trailer.

iii) They are limited to use with one type of controlling vehicle with the attachment attached to the dipper arm.

iv) They are less than 20% of the gross weight of the controlling vehicle. v) They comply with 7.3.3.1 a).

It is recommended that automotive air-brake components are used on trailer brake systems.

7.2.2 Two wheeled trailers and two wheeled attachments shall be fitted with a coupling and connections at one end only. The laden trailer shall either be less than 20% of the gross weight of the towing vehicle, or service brakes shall be fitted.

The Engineering Acceptance Certificate and the instruction handbook should show whether an attachment (type 0D trailer) is able to move along the track in either / both travelling and working modes when disconnected from the towing vehicle, which will define when service brake requirement can be exempted.

7.2.3 Trailers whose design obstructs the forward vision required by 5.8.1.1 if used in front of the towing vehicle shall have a limitation shown on the Engineering Acceptance Certificate and in the instruction handbook 'shall not be propelled' and the data panel, where fitted, (see Appendix C) marked 'not to be propelled'.

7.2.4 The manufacturer shall provide any necessary fixed equipment for load retention and include the details of use in the instruction handbook.

7.2.5 Where loading ramps are provided, their use (including the stabilisation of the trailer during the loading operation) and the capacity shall be included in the instruction handbook.

7.3

Brakes

7.3.1

Parking brake indication

7.3.1.1 Either:

a) A failsafe visual indication to show that the parking brake is in the ‘OFF’ or ‘ON’ position shall be provided on the outside of each vehicle and adjacent to all parking brake control points.

Or

b) It shall be easily possible to establish by sight whether the parking brake is applied or not.

It should be possible to see if the parking brake is on or off whilst standing outside the vehicle (but not necessarily from every position around the vehicle).

If a light system is used to indicate ‘ON’ or ‘OFF’ then either both states require a light indication, or the light should indicate the ‘ON’ state so that the indication is failsafe.

7.3.2

Hydraulic parking brake

7.3.2.1 Hydraulic released parking brakes shall be failsafe.

7.3.2.2 There shall be no self-contained systems for manual release.

Hand pumps, or accumulators for storing pressure which can be used to release the parking brake whilst the trailer is disconnected from its towing vehicle, should not be fitted.

7.3.3

Service brake indication

7.3.3.1 The manufacturer shall detail in the instruction handbook the instructions for demonstrating continuity of the service brake each time the trailer is coupled.

7.3.4

Miscellaneous vehicles and attachments

7.3.4.1 Miscellaneous vehicles and attachments with rail wheels (see 4.5) shall either: a) Be fitted with a failsafe brake which automatically applies when not coupled or

attached to the towing vehicle. Or

b) The design of the vehicle or attachment prevents a run-away.

7.3.4.2 For two wheeled trailers and attachments whose design prevents a run-away, the design shall also prevent a run-away if more than one trailer is towed coupled together.

7.3.4.3 Where attachments are fitted with a braking system, the documented brake testing procedure shall form part of the maintenance procedures in the instruction handbook and shall meet the stopping distances set out in 5.6.2.

7.3.4.4 For non load carrying attachments, with two or more rail wheels, that are limited to use with one type of controlling vehicle and where the attachment is less than 20% of the gross weight of the controlling vehicle, it is permissible for the attachment to comply with 7.3.3.1 a) and not be fitted with a service brake system.