AS 1636.2-1996

1 - AS 1636.2-1996 TRACTORS - ROLL-OVER PROTECTIVE STRUCTURES - CRITERIA AND TESTS - REAR-MOUNTED FOR NARROW-TRACK TRACTORS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 OBJECTIVE
6 - 1.3 APPLICATION
6 - 1.4 REFERENCED DOCUMENTS
7 - 1.5 DEFINITIONS
7 - 1.5.1 Competent person
7 - 1.5.2 Tractor
7 - 1.6 EQUIVALENCE
7 - 1.7 ALTERNATIVE TO PHYSICAL TESTING
7 - 1.8 GENERAL REQUIREMENTS
7 - 1.8.1 ROPS previously tested on different tractor models
8 - 1.8.2 Measurement tolerances
8 - 1.8.3 Tractor mass
8 - 1.8.4 Seat location and seat reference point
8 - 1.8.5 Zone of clearance
9 - 1.8.6 Repairs to ROPS
9 - 1.9 MARKING
15 - SECTION 2 DYNAMIC TESTING
15 - 2.1 SCOPE OF SECTION
15 - 2.2 CONDITIONS FOR ACCEPTANCE
15 - 2.3 SELECTION AND PREPARATION FOR TEST OF ROPS AND TRACTOR
15 - 2.4 APPARATUS AND EQUIPMENT
15 - 2.4.1 Measurement of clearance zone
15 - 2.4.2 Impact tests
16 - 2.4.3 Crushing tests
16 - 2.5 TESTS FOR ESTABLISHING STRENGTH OF CAB OR FRAME AND ATTACHMENT TO TRACTOR
16 - 2.5.1 Test procedure
17 - 2.5.2 Impact and crushing tests
19 - 2.5.3 Measurements to be made
20 - 2.6 REPORT AND SPECIFICATION
27 - SECTION 3 STATIC TESTING
27 - 3.1 SCOPE OF SECTION
27 - 3.2 CONDITIONS FOR ACCEPTANCE
28 - 3.3 SELECTION AND PREPARATION OF ROPS AND TRACTOR
28 - 3.4 APPARATUS AND EQUIPMENT
28 - 3.4.1 Horizontal loading tests
29 - 3.4.2 Crushing tests
34 - 3.5 TESTS FOR ESTABLISHING STRENGTH OF CAB OR FRAME AND ATTACHMENT TO TRACTOR
34 - 3.5.1 Test procedure
34 - 3.5.2 Horizontal loading from the rear, front and side
35 - 3.5.3 Crushing tests
36 - 3.5.4 Second longitudinal loading
36 - 3.6 REPORT AND SPECIFICATION
37 - APPENDIX A - TYPICAL DATA SHEET FOR A PROTECTIVE STRUCTURE
38 - APPENDIX B - TYPICAL TEST REPORT FOR A PROTECTIVE STRUCTURE (DYNAMIC TESTING)
40 - APPENDIX C - TYPICAL TEST REPORT FOR A PROTECTIVE STRUCTURE (STATIC TESTING)

Specifies test procedures and minimum performance criteria for evaluating roll-over protective structures mounted behind the driver's seat on narrow-track tractors. It applies to driver-controlled tractors, but does not cover earthmoving machinery. It includes procedures for both dynamic and static testing. A theoretical analysis of roll-over protective structures, which would provide at least equivalent performance to physical testing, is included.

This Standard specifies procedures for the evaluation of rear-mounted roll-over protective structures (ROPS) for the protection of drivers of narrow-track tractors. It also sets out test procedures and minimum performance criteria for those structures.It applies to driver-controlled tractors-(a) having a ground clearance not greater than 600 mm measured beneath the lowest points of the front or rear axles, allowing for the differential; and(b) having fixed or adjustable minimum track width of-(i) less than 1150 mm for axles fitted with the widest tyres; and the remaining axle adjustable so that the outer edges of the tyres do not protrude beyond the outer edge of the widest tyres; or(ii) less than 1150 mm for axles where wheels and tyres are all the same size.This Standard applies to driver-controlled tractors and is not intended to apply to machinery whose primary purpose is earth-moving as defined in AS 2294. It describes two different methods of testing a ROPS: a dynamic test, which may be applied to tractors having a mass of not less than 800 kg and not greater than 6000 kg; and a static test, which may be applied to tractors having a mass of not less than 560 kg and not greater than 6000 kg.NOTE: A ROPS is a structure whose primary purpose is to reduce the possibility of an operator from being crushed or otherwise injured in the event of a tractor rolling over. Wearing a seat belt in conjunction with using a ROPS, may provide additional protection in the event of a tractor rolling over. Seat belts should comply with AS/NZS 2596 or SAE J386.

First published as AS 1636.2-1996.