Tow eyes June 2006
Transport Specialties Ltd, Cnr Kerrs and Ash Rds, Wiri, P.O. Box 98971, South Auckland Mail Centre. phone: (09) 980 7300 fax: (09) 980 7306 email:
[email protected]
Contents Page 2
40mm weld-in tow eye
Page 3
50mm weld-in tow eye
Page 5
Flange mount tow eye
Page 7
Drawings
Page 8
Interchangeable tow eye
Page 9
Tow eye bushes
Page 10
Wear and Testing
Page 11
Welding
Page 13
Capacity
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40mm Weld-in tow eye
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Pt #: 40mm/SS D-value: 125kN 65W x 55Hmm shank x 385mm OA length Weight: 7.2kgs Static vertical support load: 900kgs (dependant on Dc and V-value) DC-value: 66kN V-value: 20kN
Pt #: 40mm/LS D-value: 125kN 65W x 60Hmm shank x 385mm OA length Weight: 7.8kgs Static vertical support load: 1000kgs (dependant on Dc and V-value) DC-value: 74kN V-value: 23kN
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50mm Weld-in toweye
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Pt #: 50mm/SS D-value: 130kN 65Wx 60Hmm shank x 440mm OA length Weight: 10.5kgs Static vertical support load: 1000kgs
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Pt #: 50mm/LS D-value: 314kN 80Wx 75Hmm shank x 432mm OA length Weight: 13.4kgs Static vertical support load: 1000kgs (dependant on Dc and V-value) DC-value: 90kN V-value: 30kN
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50mm Weld-in tow eye (cont) • • • • • •
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Pt no. 10990173 D-Value:150kN Up to 2500kgs static vertical load Length face plate to eye centre: 331mm Weight: 28.5kgs GTW 20,500kg- Static vertical support load: 2500kgs GTW 25,000kg- Static vertical support load: 1000kgs Mounting Instructions Fastening plate made of material St 52-3 DIN 17100 is to be welded on so that the flangeside marked with ‘0’ is facing up (circular welding with fillet = 10mm radius). Before Welding: Twist off the nuts VM16 DIN 980 quality 8 from the screws M16 quality 8.8 at the sleeve and pull off the distance sleeve. After welding: screw up all 4 nuts (oil applied) and tighten them alternatively and regularly until the tightening torque of 200+10Nm is reached. After the first 1500-3500kms check torque settings. If necessary, re-tighten.
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Flange mount tow eye • • • • • • • •
40mm Pt no. 10990548 D-Value:125kN 6 bolt holes Overall length: 304mm Weight: 10kgs Static vertical support load: 1000-2000kgs DC-value: 100kN V-value: 36kN Screw Specs: M16 x 50 DIN9 12-10.9
50mm Pt no. 10995337 D-value: 190kN 8 bolt holes Overall length: 311mm Weight: 11.2kgs Static vertical support load: 1000-2500kgs (dependant on Dc and V-value) DC-value: 100-135kN V-value: 45-75kN Screw Specs: M16 x 50 DIN9 12-10.9
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Backing Plate Pt no. 2498405 D-Value:150kN Suitable for both 40mm and 50mm flange mount toweyes
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Flange mount tow eye (cont)
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40mm Bolt kit Pt no. 08992835 6 bolts, grade 8.8
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50mm Bolt kit Pt no. 14990561 8 bolts, grade 10.9
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40mm Pt no. 10990548KIT 50mm Pt no. 10995337KIT Flange mount toweye kit (includes toweye, plate and bolts)
Mounting Instructions: Screw Specs: M16 x 50 DIN9 12-10.9 Pre-torque screws to 100Nm (74ft.lbs) Torque screws to 280Nm (207ft.lbs) in sequence 18 Re-torque screws after 1500-3000kms
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Drawings Please also refer to the ‘Welding’ section, page 11 and 12.
10990548 40mm Flange mount tow eye
10995337 50mm Flange mount tow eye
10990173 50mm weld on tow eye 7
Interchangeable tow eye • •
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40mm Assy Pt no. 5992877 50mm Assy Pt no. 5992885 3” Pintle Eye Assy Pt no. 47204580 Torque nut to 500Nm Apply anticorrosive to shank and thread before assembly
40mm Pt no. 6992013 Overall length: 525mm Weight: 9.5kgs Static vertical support load: 1000kgs (dependant on Dc and V-value) D-value: 125kN DC-value: 74kN V-value: 23kN
50mm Pt no. 6992021 Overall length: 535mm Weight: 11.1kgs Static vertical support load: 1000kgs (dependant on Dc and V-value) D-value: 130kN DC-value: 90kN V-value: 25kN
Pintle Eye Pt no. 47204580 Housing Pt no. 1636855 Washer Pt no. 12991240 Nut Pt no. 6997732 Split pin Pt no. 12991533 8
Tow eye bushes 40mm Pt no. TB48 40mm Pt no. TB485 40mm Pt no. TB49 40mm Pt no. TB495 40mm Pt no. TB50 50mm Pt no. TB605 50mm Pt no. TB61 50mm Pt no. TB615 •
Service maintenance programmes should include regular toweye bush replacement- reducing maintenance cost. From NZS5446:1987 Clause: 5.5 Towing eye bushes shall be replaced only in accordance with the manufacturer’s instructions, and shall not be retained by welding.
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Pt no. 10990998 Wear guage for 40mm and 50mm coupling pin and toweye bush
40mm Pt no. 40MMD 50mm Pt no. 50MMD Drift for toweye bush
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Wear and testing • • • • • • • • •
Upon possible damage (deformation because of accident or overuse) the drawbar eye must be changed immediately. Damaged or loose bushes must be exchanged in good time. The max. wear of the inner diameter of the drawbar eye (with nominal diameter of 40 and 50mm) is 1.5mm when using bushes. New bushes must be mounted professionally. Welding of bushes is not allowed. When using drawbar eyes without bushes the max. wear of the inner diameter is 2.5mm. The wear of the height of the drawbar eye must not exceed 2.5mm (applying to all designs of construction). The tightening torque of the interchangeable drawbar eye must be checked at least with each inspection of the vehicle. If necessary, lubricate coupling pin and tow eye bush with oil (grease collects road debris and accelerates wear). “Generally parts with dynamic strength of more than 30mm thickness of steel quality ST 52-3, before welding should be normalised at approx. 900 degrees C, for the process of welding at approx. 250 degrees C treated and after welding at approx. 600 degrees C annealed for releasing stresses (normalising by the manufacturer/ preheat in the welding department/ annealing for releasing stresses can be cancelled without lessening the stress capacities). On welding the drawbar eye on the drawbar, the shaft of the drawbar should be pre-heated with neutral Oxy-Acetylene-Flame to approx. 250 degreess C.”
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NZS5446:1987 Clause: 5.7 Protection for the towing eye shall be included in the drawbar design to prevent ground contact of the towing eye. Spring type drawbar support is recommended.
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Welding •
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Weld-in drawbar eyes The mounting of such drawbar eyes can be carried out by using different welding seams. All welding connections are to be performed according to the regulations of the manufacturers of drawbars, poles, towing rods and/or chassis and to be checked when vehicle is approved. As minimum requirement for welding we recommend Y 42 20 (according to DIN 8559) when using inert gas, i.e. E 43 30 (according to DIN 1913) when using welding electrodes. Extract of the original DIN 74053 and 74054: “Generally parts with dynamic strength of more than 30mm thickness of steel quality ST 52-3, before welding should be normalised at approx. 900 degrees C, for the process of welding at approx. 250 degrees C treated and after welding at approx. 600 degrees C annealed for releasing stresses (normalising by the manufacturer/ preheat in the welding department/ annealing for releasing stresses can be cancelled without lessening the stress capacities). On welding the drawbar eye on the drawbar, the shaft of the drawbar should be pre-heated with neutral Oxy-Acetylene-Flame to approx. 250 degreess C.”
40mm weld-in tow eye 11
Welding (cont)
50mm weld-in tow eye
Interchangeable tow eye 12
Capacity •
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NZS5446:1987 clause 2.3.1 An expression of loading capacity of a coupling, or towing eye derived from the gross combination mass of all vehicles in combination NZS5446:1987 D= value in tonnes=GCM*/4 *This value to be the lesser of (a),(b),(c) below. Gross combination mass means: (a) The maximum sum of the axle loadings permitted by the Heavy Motor Vehicle Regulations for the towing and all towed vehicles in combination, or (b) The sum of the gross vehicle mass of each vehicle in a combination, or (c) The vehicle manufacturer’s gross combination mass rating for a towing vehicle EC/94/20 Pelase refer to the following website caluclator for both hinged drawbar and rigid drawbar trailers: www.ringfeder.de Select ‘trailer coupling and system solutions’ Select ‘guidance’
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Notes:
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