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Issue 2 | August 2012

INFOLINELED LIGHTINGSpg 8 & 9

MODULAIR®

AIR TREATMENTpg 2 to 5MTA23Trailer Suspension

www.yslsb.com

All manufacturers names, numbers, symbols and description used in this newsletter are for reference purpose only and do not imply that any part or assembly listed is the product of these company. While great care has been taken to ensure accuracy in the compilation of this newsletter, the publisher cannot be held responsible for any errors, omission and / or losses incurred.

MTA23 TRAILER SUSPENSION

Prepare To Be Amazed.The Meritor™ MTA23 top-mount trailing arm air-ride suspension....

pg 15

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pg 14

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For more information (603) 6188 8388 [email protected] Info

02 Infoline Issue 2 | 2012

The Meritor™ MTA23 top-mount trailing arm air-ride suspension is part of a complete portfolio of suspensions that deliver industry-leading ride, handling, tire life and durability. This hardworking trailer suspension is designed for a full range of applications from flatbeds to tanks to grain haulers.

With advanced patented technology like a long-life pivot bushing, a unique axle wrap design and high-damping shock absorbers, the MTA23 is the next generation of air-ride suspension. It’s an integrated system that includes road-proven genuine Meritor axles and brakes and is backed by equally amazing Meritor service and support.

Features And Benefits:

Applicable for a broad range of trailer applications with up to 23,000-lb.* rating

Integrated design includes genuine Meritor axles and brakes - recognized as the industry’s best

Patented pivot bushing absorbs road input for improved ride and cargo protection

An innovative axle wrap design provides a secure axle connection for greater overall suspension durability

The larger, more robust shock absorber- specifically tuned to the suspension:

- Provides superior damping force, braking and vehicle control - Helps to improve tire life

Design allows for simple installation on a variety of trailer frames; no special tools are required to torque fasteners

Patented pivot bushing withsteel interleaf shims providesoutstanding fore/aft stiffness

Pivot-and-alignmentconnection features aneccentric collar designfor simple and convenientaxle alignment

Large-bore high-dampingshock absorber for greatersuspension control

Patent-pending axle wrap design for durability

Unique lightweight stamped brake spider with patentedeasy-service bolt-on bushingretainer

Single-piece formed axle beamwith induction-hardened bearing journals for long life and smoothbearing operation

* Suspension and axle beam rating only. Brake and wheel-end components rated separately.

Patented Pivot Bushing.


Bushing with steel interleaf shims provides better fore/aft stiffness than competitive designs

- Provides excellent roll stiffness, minimizing roll steer for better trailer tracking during cornering

- Maintains correct axle position during operation for improved tire life

Strategically positioned voids impart vertical compliance

- Absorb road input for a softer ride and better cargo protection

Helps reduce torsional stresses at the axle for greater suspension durability

03InfolineIssue 2 | 2012

Axle Connection.

Patent-pending axle wrap design provides a secure axle connection for greater overall suspension durability

- Specially configured window geometry provides a more effective load distribution for maximum strength

- Weld is continuous with no open start or stop, eliminating high stress points

- Axle wrap adds thickness and strength to the axle at critical connection areas

Robotically welded for structural integrity

Heavy-Duty Shock Absorbers.

Larger shock absorbers specifically tuned to the suspension provide three times more damping power than competing designs

High damping forces deliver increased suspension control

- Maintain a more consistent tire footprint for increased tread life and better stopping

- Provide a more controlled ride

Large-bore design with high fluid capacity for cool operation and longer life

Tube-style shock mounts effectively withstand the load of suspension movement while the long, large-diameter bolts maintain optimum clamp load

Integral rebound check feature protects against air-spring overextension



Pivot-And-Alignment Connection.

Pivot-and-alignment connection features an eccentric collar design - no welding required

No special tools required - easy to achieve a 470- to 570-ft. torque requirement

Field realignment can be achieved without replacing hardware

Proven Meritor™ Axles And Brakes.

Standard, field-proven, long-life brake linings are preferred by fleets for their performance and wear characteristics

Optional PlatinumShield™ coating on Q Plus™ brake shoes to resist rust-jacking and provide extended brake shoe life

Patented Meritor brake rollers extend camshaft life

Unique stamped brake spider is the lightest in its class

The Meritor MTA23 is the only integrated trailer suspension equipped with industry-leading Meritor components, including genuine Meritor axles and brakes.

Amazing Support.SM

Dedicated, responsive suspension specialists and product training support

Fast parts availability through 5,300 distributor and OE dealer locations

Spec optimization and application engineering support

Personal attention for training and after-sale support

Real-time support and warranty administration

Being a recognized leader in axles, suspensions and brakes calls for service and support that is as amazing as our products. That’s why we offer Amazing Support. It’s a complete package of services that includes genuine OE-quality aftermarket parts availability, with complete aftermarket service and full customer support. All brought to you by the industry’s most knowledgeable, committed reps, dedicated customer service and technical support, complete online catalogs, expert training programs and comprehensive product warranty support.

With Amazing Support, you get:

Litho in USARevised 05-10SP

10104 (13028/11900)©2010 ArvinMeritor, Inc.

Product Info For more information (603) 6188 8388 [email protected]


Capacity Trailer Applications System Base Model Configuration System Base Weight

23,000 lbs.* Platform/flatbed, tank, 14" ride height, TN axle 530 lbs. grain, fixed-axle van and with 71.5" track, with reefer, bottom-discharge 16.5" x 7" Q S-cam brakes dump, container chassis, with Meritor MA212 linings livestock

Ride Height Range And Axle Travel.

Ride Height Jounce Rebound

14" 3.0" 4.0"

15" 3.1" 4.0"

16" 3.1" 4.0"

17" 3.1" 4.0"

Available Options.

Axle TN, TQ, TP

Axle Track 71.5", 77.5", 83.5"

Ride Height 14", 15", 16", 17"

Brakes S-cam brakes: 16.5" x 7", 8" and 8.625" Q and Q Plus™

Air disc brakes: EX225 and PAN 22

Frame Attachment Weld-on or bolt-on

Meritor Tire Inflation Automatic tire inflation system that keeps tires properly inflated

System (MTIS™) by P.S.I.

Shock Absorber Standard or high-damping

Other A variety of wheel-end options, slack adjusters, brake linings and

chambers are available

* Suspension and axle beam rating only. Brake and wheel-end components rated separately.

10th & 11th May 2012 at Bangkok, Thailand

For more information (603) 6188 8388 [email protected]


The 2012 Firestone Annual Asia Pacific Training School was held at the Ambassador Hotel in Bangkok, Thailand on the 10th and 11th May, 2012. This round of training session was focused on “Industrial Applications”

The first day basically covered topics such as air spring basics (construction, nomenclature, types, and terms), Airstroke Actuator, Airmount Isolators, application guidelines/precautions, and failure modes.

For the next day, topics discussed are Marsh Mellow springs (construction, selection procedure, and applications), discussion on application data sheets (isolation & actuations) and lastly, special applications.

The presentation was performed by Mr. Naveen Sachan (Design and Development Engineer) with the presence of Ms. Bhawana Koundal (Area Sales & Marketing Manager) and Mr. Arun Kumar (Managing Director of Firestone Asia Strategic Business Unit).

Product Focus For more information (603) 6188 8388 [email protected]


Airstroke actuators are also known as the flexible wall “bellows type” air cylinder. They have many unique capabilities and limitations that set them apart from traditional metal wall cylinders. Conditions that suit the Airstroke actuators well are actuation that requires a high force and short stroke cylinder. The Airstroke actuators have long been used in the industrial market as pneumatic actuators incorporated into new and innovative machinery designs as well as replacement actuators for existing applications that had previously used traditional pneumatic or hydraulic cylinders.

Advantages:1) Lower cost than conventional pneumatic or hydraulic

cylinders2) Wide size range – 2.2” to 37” diameter, up to 100,000

lbs, 14” stroke3) Durable 4) No maintenance or lubrication required5) No internal rod or piston6) Friction-free for immediate response 7) Flexible media – uses gas8) Angular capability9) Side loading capability10) Compact starting height11) Factory sealed and tested

Applications:

Conveyor Manufacturing

* Photos featured is for illustration purposes only.

Firestone AirstrokeTM Actuator

As an actuator, the Airmount is extended by inflating the air spring and retracting by exhausting air. The bellows are inflated to its recommended design height and maintained at the appropriate air pressure in order to support the weight of the isolated equipment. Pneumatic isolators operate on the principal of gas compression instead of displacement of a solid as in other materials such as cork, rubber pads, or coil springs. Airmount isolators can provide the highest degree of isolation of any type of vibration isolator. System natural frequencies as low as 60 cycles per minute (1 Hertz) are available and in order to achieve similar results, a conventional coil spring isolator requires a real deflection of 9 inches.

Advantages:1) Unsurpassed isolation capability2) Natural frequencies as low as 60 cycles/minute (1 Hz),

external reservoirs provide additional volume for an even lower natural frequency

3) Constant isolation efficiency – natural frequencies does not change with load, allowing the use of the same air spring unevenly loaded equipment

4) Accurate height control with regulated internal air pressure

5) Wide size range – 2.2” to 37” diameter, up to 100,000 lbs, 14” stroke

6) Compact installed height – as low as 2.5”7) Effective reduction of structurally transmitted noise

Applications:

Firestone AirmountTM Isolators

Pipe Crawler

Lift and Tilt TablesPrinting Industry

Pneumatic GripperMining Industry

CompressorPackaging Plant


ModulAir® Integrates SystemComponents for Long Life andReduced Service.


Combining air treatment, intelligent control and distribution within one modular platform, the new Haldex ModulAir® advances the air management and distribution function within vehicle air systems. By reducing the number of components into an integrated air management system, ModulAir® reduces system size and weight, extends life,lowers maintenance and minimizes failure points for heavy duty truck and bus applications.

The new Haldex ModulAir® dryer advances the air management and distribution function within vehicle air systems by combining air treatment, intelligent control and distribution within one modular platform.

The new modularly-designed ModulAir® provides a new family of products to meet the needs of various global applications.

L25107 US 8/08 5M CM

In its most basic form, it is a mechanical air dryer.• All ModulAir® dryers contain the Haldex exclusive MTC (Multi-Treatment Cartridge) that maximizes drying capacity• ModulAir® integrates the system check valves, air governor and regeneration system without a separate purge tank, minimizing space requirements. ModulAir® reduces maintenance with fewer components and fewer failure points.• The ModulAir® platform offers flexibility of air drying and delivery. Advanced versions of ModulAir® will incorporate an ECU with intelligent controls for governor function, purge control and energy management.

Nothing keeps your air brake system dryer while eliminating oil than the 5-stage Multi-Treatment Cartridge

(MTC), which effectively eliminates oil while maintaining high water adsorption capability. With water drying

capacity up to three times more than competitive cartridges, the exceptional drying capacity of the MTC

doesn’t impede airflow, which reduces corrosion and freezing problems. The extended desiccant service life

means fewer replacements and more consistent air quality to your air brake system.

ModulAir® Simplifies Typical Air Brake System by Reducing Components

The Heart of ModulAir® is the Haldex Multi-Treatment Cartridge

COMPRESSOR AIR DRYER

GOVERNOR

SUPPLY TANK

SAFETY VALVE

CHECK VALVES

PRESSUREPROTECTION

VALVES

PRIMARYCIRCUIT 21

SECONDARYCIRCUIT 22

AUXILIARYCIRCUIT

AIR SUSPENSION CIRCUIT

ELEMENTS IN THIS SHADEDBOX CAN BE REPLACED

TypicalAir Brake System

COMPRESSOR

AIR SUSPENSION CIRCUIT

AUXILIARY CIRCUIT

TypicalAir Brake SystemModulAir® Platform Integration

PRIMARYCIRCUIT 21

SECONDARYCIRCUIT 22

09Infoline


ModulAir® Dryer Product Anatomy

Figure 1: ModulAir® Exploded View

Issue 2 | 2012

Desiccant Cartridge, Canisterand Mounting Collar

Turbo Protection Valve

Governor

Regeneration Valve

Heater

Unloader orPurge Valve

Safety Valve

ControlModule

DryerModule

DistributionModule

The ModulAir® dryer consists of three main modules; the Dryer Module, for drying; the Distribution Module to deliver air to brake circuits; and the Control Module to control air production and dryer purge operation

Dryer ModuleThe Dryer Module holds the turbo protection valve, check valve, safety valve, desiccant cartridge with canister and heater assembly.

Distribution ModuleThe Distribution Module for the ModulAir® 4-Circuit version contains four pressure protection valves that are set at different pressure settings to give a priority to the primary, secondary and remaining two circuits. Although the dryer purges contaminants through a hole in the Distribution Module it does not contain valves or components that control the dryer purge cycle.

Control ModuleThe Control Module on the standard version of ModulAir® consists of a typical piston airgovernor that is pre-set to cut-in and cut-out pressures. Other versions of the ModulAir® Control Module include various electronic controls for governor, circuit pressure monitoringand control, and air dryer purge cycle.

Desiccant Cartridge, Canister and Mounting CollarThe desiccant cartridge is where all drying and contaminant removal occur in the air dryer. The Haldex ModulAir® dryer contains the Haldex patented MTC cartridge design which has five separate stages of drying. The desiccant cartridge is covered by the canister and affixed to the dryer base with the mounting collar and four bolts.

Turbo Protection ValveThe turbo protection valve, located at the dryer inlet, prevents turbo pressure loss on turbocharged compressor applications when compressor in unloaded.

GovernorA standard pneumatic piston-style governor is used in ModulAir®

to control the cut in and cut out pressures in the air system. The governor signals the compressor to load or unload.

Safety ValveThe safety, or pop off valve, is designed to relieve system pressure if it reaches a level higher than normal operating pressures. This protects other brake system components from high pressures that could cause system damage or failure.

Unloader/Purge ValveThe unloader/purge valve in ModulAir® is essentially a purgevalve. When the dryer is ready to purge, the unloader/purge valve

opens to allow all contaminants collected within the dryer and cartridge to be flushed out through the purge port on the dryer.

Regeneration ValveThe regeneration valve serves as a timer to allow a designated amount of air to flow from theair brake system back through the ModulAir® dryer in order for it to purge and regenerate the desiccant.

HeaterA heater helps prevent moisture collected within the air dryer from freezing. The integrated thermostat on the heater controls when the heater is energized.

Technical Data for ModulAir® Dryer

Air FlowMaximum inlet airflow = 991 slpmTypical inlet airlflow = 340 slpm @ 8.6 bar, 71ºC

TemperatureMaximum operating range = -40°C to +80°CRecommended operating range = +5°C to +65°C

PressureGovernor settings Cut-in pressure = 7.25 ± 0.35 bar Pressure range = 1.55 ± 0.5 barSafety valve opening pressure = 12 + 1 barBurst pressure = 25 bar

Turbo protection valve Opening pressure = 3 ± 0,5 bar Closing pressure = 1.5 ± 0.2 bar

Pressure protection valves Opening pressure primary circuit (21) = 7.1 ± 0.2 bar Closing pressure primary circuit (21) = 5.7 bar

Opening pressure secondary circuit (22) = 7.5 ± 0.2 bar Closing pressure secondary circuit (22) = 6.0 bar

Opening pressure auxiliary circuit 1 (23) = 3.8 ± 0.2 bar Closing pressure auxiliary circuit 1 (23) = 2.9 bar Opening pressure auxiliary circuit 2 (24) = 5.8 ± 0.2 bar Closing pressure auxiliary circuit 2 (24) = 4.6 bar

Maximum Inlet Airflow = about 990 SLPM

ElectricalNominal voltage = 12 or 24 V DCPower consumption = 90 WattResistance Amperage = 8 amps @ 12V / 4 amps @ 24V

WeightsAssembly weight = about 9.1 KgDesiccant cartridge weight = about 1.6 Kg

What is it? The Result!

Special Binotto finishing process

Inside and Outside the tubes

Increasing the density ofmaterial, without removing thesuperficial crests, but pressingthem with special machines


choose to B stronger

Negative peaks (“troughs”) inside the surface of the tube (black vertical lines inside the grey area) for a perfect lubrication. Total absence of the positive peaks (“crests”) in order to avoid any risk of seal abrasion.

RO

UG

HN

ESS

CU

RV

EH

- M

AG

= 5

0V

- M

AG

= 5

000

Increasing of superficial hardness

up to 280/300 HV/50 GR

The superficial hardness value of the Binotto tubes is considerably higher than the grinded/polished ones (213/215 Hv tested into the steel heart) with many advantages: superior wear resistance


Event For more information (603) 6188 8388 [email protected]

Valens LED Lightings is opened in Penang. This would be a bright and fancy store, featuring outrageous and fabulous LED product ranging from household lighting to automotive lighting. At Valens LED Lightings, knowledgeable salespersons are trained and are ready to assist all customers in learning all about the lights selection and allocation of lights. This is essential and useful to those who wanted to shift to new house.

Our outlet in Penang will be open for service from 10.30am to 10.30pm daily. It’s located at the second floor of Queensbay Mall, Bayan Lepas, Lot 2F-19 nearby Digital center, neighboring Ace Hardware.

Valens is responsible to reduce the impact and consequence that brought by compact fluorescent and incandescent light, which these lights contribute ore carbon dioxide emissions to the environment compared with LEDs Use and embrace with LED products will be the prior step to sustain the green environment.

LED LIGHTINGS



Segula applies modern LED technology to Thomas Edison’s original creation. Reproduce as closely as possible the originally pleasant warm light of traditional bulbs. Segula guarantees 1,5000 hours with no loss of brightness. That is 2 years of 24 hour operation.

Segula saves up to 90% energy and no heat generation compared to incandescent light bulb. All bulbs are save to use and TUV certified.

The light spectrum illustration demonstrates the characteristics of Energy Saving Lamps, conventional Lighting and Segula LED Bulbs. The spectrum of all bulbs is very close to the incandescent original. That is why most consumer prefer these bulbs over other choices in the market.

Like-for-like replacement!Exchanging LED has never been easier. Segula LED do not have heatsinks, users can continue to use their current lamp fixtures and save energy

Warm light spectrumSegula LED bulbs use LED designed to replicate the spectrum of the traditional light bulb. The resulting warm white is the color which most people cherish.

Outdoor useUse Segula LED outdoors, because our bulbs are made of traditional glass, not plastic, improving also the overall lighting quality

Largest range of bulb shapesSegula features the world’s broadest range of classically shaped LED products.

No shadows360 degree lighting - Segula LED spread illumination at all angles

Dimmable by designMost Segula LED bulbs are dimmable straight out of the box.

ReliabilitySegula LED use fewer components than conventional LED do. This means higher longevity and reliability as we have less parts which can fail during the normal life time of the bulb

Move efficientSegula LED often are more efficient meaning higher energy savings than other LED designs.




“Focus on Excellence”Performance & Safety

• Prevent being stranded on the road• Always have reserve power for starting engine

FEATURES & BENEFITSFOR ENGINE WITH 12V BATTERIES• Quick & easy to install (Saves on Installation Cost)• No Hard wiring• Easy to transfer from Vehicle to vehicle• Simple and easy operation• Optional : with two remotes for convenience• Prevent the following: • Being Stranded • Dead Battery • Jumper cables • Towing • Emergency calls • Certification CE, FCC, E-mark• Certification ISO-9001-200, excellence in quality and service• O.D.M/O.E.M are welcome

Breakthrough Technology State-of-the-Art

NO MORETOWING

NO NEED FORBOOSTING

NEVER BESTRANDED AGAIN

NO MOREEMERGENCY CALLS

NO MOREJUMPER CABLES

+ -

BREAKTHROUGH TECHNOLOGYBatteryGuard is a state of the art electronic device, automatically monitors your battery capacity.It will prevent ypur battery from going DEAD by reserving power of the battery for emergency engine start, before it reaches dengerously low levels of voltage.

MAINTAINSEMERGENCY STARTING RESERVES

PREVENTS YOU BEING STRANDED

17Infoline

Poduct Focus For more information (603) 6188 8388 [email protected]

Issue 2 | 2012

“Focus on Excellence”Performance & Safety

• Early warning audible and visual alarm, detects failure in the vehicle’s electrical system

State-of-the-Art

Charging systemRegulator system

Alternator systemBattery capacity

Flexible mounton dash

Quick & easyconnection throughcigarette lightersocket

LCD Display /7 Segment LED Display

LED indicator fortemperature C/F

Mute button:To stop alarm

Tri-colour LEDindicator shows thebattery status &charger, alternator,or regulator systemfailure

Mode button:voltage/temperature

FEATURES & BENEFITS• Fits all 12 volt battery cigarette lighter sockets. Easy DIY installation and operation• State of the art technology, monitors performance of the vehicle’s electrical system• Automatic detection of faulty Charging System, Alternator System, Regulator System• Early warning Audible & Visual Alarm, for low battery, and system failure of charger, alternator or regulator• Quick and easy connection through vehicle’s cigarette lighter socket• Easy viewing, visual battery voltage display• Tri-Color LED indicators, accurately show the battery status and electrical system status• Small, compact, light, convenient, easy to carry and stow away• Stylish with modern design, complements any vehicle decor• Easy mount on dash• Extra function: Temperature display (°C/ °F)• ISO 9001 Certified• CE/FCC Certificate• Rohs regulation compliance

Easy mount on dash


Technical Info For more information (603) 6188 8388 [email protected]

Tubeless AndTube-Type TiresThe tubeless tire is similar in construction to a tube-type tire, exceptthat a thin layer of air and moisture-resistant rubber is used on the inside of the tubeless tire from bead to bead to obtain an internal seal of the casing. This eliminates the need for a tube and flap. The two types of tires require different rim configurations: the tubeless tire uses a single-piece wheel; and the tube-type tire requires a multi-piece wheel assembly Figure 2.2. Both tires, in equivalent sizes, can carry the same load at the same inflation pressure. However, tubeless tires generally offer more benefits than tube-type tires in line-haul operations.Tubeless Tire Characteristicsvs. Tube-type:• less complicated mounting process

due to use of a single-piece wheel• decreased weight with lighter tire/

wheel assembly• less maintenance of parts and reduced

parts inventory• improved bead durability potential

from less brake drum heat resulting from higher wheel clearance

• improved crown and sidewall durability potential from cooler running tubeless casing

• better lateral stability from lower section height

• reduced downtime from punctures

Low Profile TiresLow aspect ratio tires are a category of radial tubeless tires which feature section widths wider than their section height. The ratio of tire section height to section width for these low aspect ratio tires generally fall between 80% to 70%. Low aspect ratio tires have shorter sidewall heights and wider tread widths than their “conventional” aspect ratio tire counterparts.

These differences lead to the following tire characteristics:• improved treadwear (less irregular

wear) on steer and trail axles• lighter weight and less federal excise

tax• better trailer cube potential due to

smaller tire diameter on new equipment

• improved stability and handling from higher lateral spring rate

• greater susceptibility to sidewall curb damage

As fleet experience with low profile tires increases, other considerations (such as vehicle geometry, alignment maintenance, and brake wear) may need to be addressed depending on theapplications and service requirements of the operation.

Drivetrain/gearing must be taken into account when converting to low profile tires, either at the original equipment orreplacement level. These involve engine RPM, transmission, drive axle gear ratio, and tire RPM. The objective is to obtain the most fuel efficient engine RPM/ ground speed relationship consistent with service condition requirements.The effect on road speed at the same engine RPM using a 55 mph base depends upon which conventional

aspect ratio and low profile tires are involved.

Generally, if the percent change in the tire RPM is 3% or less, a gearing changeis not required Table 1.

Wide-Base(Super Single) TiresA wide-base tire is simply a larger tire with a lower profile by nature. Currently, the primary application in North America is on vehicles whose front axle loads exceed the capacity of standard tires. Construction vehicles such as cement mixers and refuse haulers are prime examples. In addition to increased load capacity, these larger tires provide improved flotation versus conventional size tires.

The common wide-base sizes include:385/65R22.5, 425/65R22.5, 445/65R22.5, 435/50R22.5, and 445/50R22.5.

The pros and cons of wide base singles versus duals in many performance categories are dependent on specific vehicle configuration and operations. Some key considerations and potential benefits are discussed in the following paragraphs.

TABLE 1Conventional vs. Low Profile Tire Comparison

11R22.5 295/75R22.5(Low Profile)

DiameterSection WidthNonskidRimSLRRPM

Table 1

41.5”11.0”19/32”8.25”19.4”501

40.0”11.2”18/32”8.25”18.7”514

Technical Info For more information (603) 6188 8388 [email protected]

Potential advantages for wide base singles include: increased payload weight and volume due to lower tire/ wheel weight/volume, ease of maintenance (no mismatched tires, etc.), reduced inventory, improved fuel economy, and sometimes more uniform wear in freerolling trailer applications. Possible legal restrictions of nonsteer axle application of wide base singles should be thoroughly investigated before finalizing size selection.

Original equipment fitment of wide base singles offers the potential for lowering the center-of-gravity and thus improving the stability of vehicles such as tankers. In retrofit applications, care must be taken to properly select wheel/rim offsets to maintain a tracking width for acceptable stability. A common way to take full advantage of the wide base single concept is to use a 77.5 inch wide axle in place of the standard 71.5 inch.

Inherent advantages of duals versus wide base singles include standardization of tires/wheels, reduced road service due to tire problems through “limp” capability to get to

repair facility, and improved vehicle stability/control during tire air loss.

Matching Tires ForSpeed And Axle WeightsAs mentioned earlier, there are drive train/gearing considerations which must be made at the original equipment or replacement level when utilizing low profile tires. These involve engine RPM, transmission, drive axle gear ratio and tire RPM. The objective is to obtain the most fuel efficient engine RPM/ground speed relationship consistent with service condition requirements.

The effect on road speed at the same engine RPM, using a 55 mph base, depends upon which conventional sizes and which low profile diameters are involved. Generally, if the percent change in the tire RPM is 3 percent or less, a gearing change is not required.

In a tire selection process, it is mandatory that consideration be given to selecting a tire size and load range which at least equals the maximum load requirements by axle position (steer, drive, or trailer). All highway truck tires

have load limits established for tires used in normal highway service. Therefore, when selecting a tire for service, both the carrying capacity and speed implications must be considered.

For example, when selecting tires for a tractor-trailer combination with a gross combination weight (GCW) of 80,000 lbs. and an axle weight distribution of 12,000 lbs. on the steer, 34,000 lbs. on the tandem drive, and 34,000 lbs. on the tandem trailer axles, common conventional tire sizes used are 295/75R22.5 (275/80R22.5), 285/75R24.5 (275/80R24.5), 11R22.5 and 11R24.5 Load Range G. The load and inflation tables (from the Engineering Data Book for Over-the- Road Truck Tires or www.goodyear.com/truck) for these sizes are shown in Table 2.

TABLE 2Tire Load Limits (lbs.) At Various Cold Inflation Pressures

(The Pressure is Minimum for the Load, Maximum Speed of 60 MPH)

Size Usage

Inflation Pressure (psi)

11R22.5

Table 2

(F) = Load Range F (G) = Load Range G (H) = Load Range H

DualSingle

70

43804530

75

45804770

80

47604990

85

49505220

90

5205(F)5109(F)

95

54155730

100

56255950

105

5840(G)6175(G)

110

58956320

11R24.5 DualSingle

46604820

48705070

50705310

52605550

5510(F)5840(F)

56756095

58406350

6005(G)6610(G)

62056790

295/75R22.5 DualSingle

45004500

46904725

48854945

5070(F)5155

52605370

54405510(F)

5675(G)5780

58005980

6005(H)6175(G)

285/75R24.5 DualSingle

45404545

47404770

49304990

5205(F)5210

53105420

54955675(F)

5675(G)5835

58606040

6175(H)6175(G)


GOODYEARRadial Truck Tire & Retread Service Manual

Section 2• Tire Selection

The roll sensor was extensively tested todetermine the exact timing of deployment.

RS305 ROLLOVER SENSOR

PURPOSE:Designed to meet AS2809, “Purpose built road tank vehicles designed to carry dangerous goods in bulk shall be fitted with a rollover device which automatically shuts down the engine and all power sources in the case of a rollover, by activating the battery isolation switch. The device shall not be activated at less than 45° to the vertical.”

In the event of a tanker tilting more than 45° from the horizontal, power from the truck battery to all electrical equipment is cut to remove possible source of product ignition that may cause fire or explosion.

The sensor is also used to operate a Liquip engine strangler to ensure the truck motor stops.

ADJUSTMENT OR SERVICE:Sensor testing is recommended when standard maintenance is carried out on the tanker (typically every six months).

A hinging base is provided to provide simple testing of the sensor. Remove one of the humpback pins and tilt the sensor body until it reaches the stop. At this point all electrical circuits will have no voltage and truck engine will stop.

A unique “self diagnosis” tool indicates rollover sensor functionality. A steady bright green LED indicates the rollover sensor is horizontal and functional. A steady bright red LED indicates the rollover sensor is tilted past its activation angle.

TECHNICAL DATA:• Operating voltage range: 9V to 30V DC.• Operating temperature range: -20degC to +80degC.• Complies to Australian Standard AS2809 -1999.• IP67 rated.• Reverse polarity protected.• Immune to power surges and outages.• If the sensor loses power, it won’t actuate the

emergency mains switch

The Roll-Over Sensor minimises the risk of electrically ignited fires occurring in tanker accidents involving roll-over. In the event of a tanker tilting more than 45º from the horizontal, power from the truck battery to all electrical equipment is cut to remove possible source of product ignition that may cause fire or explosion.

The sensor is also used to operate a Liquip engine strangler to ensure the truck motor stops

ISO 9001 : 2008

HO E N I X TMLot 11B, Jalan Perusahaan Dua, Kaw. Perusahaan Batu Caves, 68100 Batu Caves, Selangor D.E Malaysia.Tel: +603-6187 3888 Fax: +603-6187 6888 E-mail: [email protected]

(312334-P)

HOPS will not deploy during a frontal or side-impact crash. A roll sensor calculates both the angle of the vehicle and the speed at which it’s rolling to determine when to fire the airbag restraints.

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