freightliner BUSINESS CLASS M2 Driver Manual
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freightliner BUSINESS CLASS M2 Driver Manual

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BUSINESS CLASS M2
Driver's Manual
Part Number A24-01238-000
Publication Number STI-455-6

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  • Page 1 ® BUSINESS CLASS M2 Driver’s Manual Part Number A24-01238-000 Publication Number STI-455-6...

  • Page 2: Table Of Contents

    Instruments Instrumentation Control Unit ............3.1 Warning and Indicator Lights .

  • Page 3: Instrumentation Control Unit

    Instruments Instrumentation Control Unit Figure 3.1 shows a typical ICU3 instrument cluster. Figure 3.2 shows the ICU3S instrument cluster. The instrumentation control unit (ICU) provides the driver with engine and vehicle information. It is com- Ignition Sequence prised of standard and optional gauges, an audible warning, a driver message center, and a lightbar con- When the ignition is turned on, the ICU runs a self- taining warning and indicator lamps (also known as...
  • Page 4 ICU is displayed NOTE: If active faults are present, take the ve- on the driver message center, followed by ac- hicle to an authorized Freightliner service facility tive faults as soon as possible. NOTE: Air gauges do not complete a sweep of their dials during the ignition sequence.

  • Page 5: Warning And Indicator Lights

    Instruments • System voltage falls below 12 volts. IGNITION SWITCH • TURNED TO ON Door is open with the headlights on and the parking brake off. • Driver seat belt is not fastened with the parking brake off (optional). • Outside temperature falls below 35°F (1.7°C) ICU PERFORMS SELF−TEST...
  • Page 6 Instruments Common Warning and Indicator Lamps Lamp Description Color Indicates a serious fault that requires engine shutdown immediately. The engine protection system will reduce the maximum engine torque and speed, and, if the condition does not improve, will shut down the engine within 30 to 60 seconds.
  • Page 7 Instruments Common Warning and Indicator Lamps Lamp Description Color Slow (10-second) flashing indicates a regeneration (regen) is in progress. High Exhaust System IMPORTANT: When the HEST lamp is illuminated, do Temperature (HEST)8 not park the vehicle near flammable material. Solid illumination indicates high exhaust temperatures at the outlet of the tail pipe when speed is below 5 mph (8 km/h).
  • Page 8 Instruments Common Warning and Indicator Lamps Lamp Description Color EPA10 Detroit engines: Indicates that the system is preventing the starter from cranking. This can occur when the ignition switch is turned to START before the gauge sweep has completed, or if the starter has overheated. Wait To Start (EPA07/ WAIT TO START...
  • Page 9 Instruments Common Warning and Indicator Lamps Lamp Description Color High-Beam Headlights Indicates the high-beam headlights are on. Blue Fig. 3.4 for an explanation of the aftertreatment system (ATS) warning indicators, and actions required to avoid further engine protection steps. † On vehicles equipped with the ICU3S, this information is displayed on the driver message center.

  • Page 10: Driver Message Center

    Freightliner service facility If fault codes are displayed, press and hold the Parked Screens/Menus mode/reset switch to view the next fault code until reaching the DIAG screen.

  • Page 11: Instruments

    Instruments 123456.7 CLEAr Default Odometer Hold Clear Defaults Dispay Screen 12.3 VOLTS Push Push 123456.7 123456.7 To Dispay Total Engine Miles TRIP Hold To Reset Trip Miles 12.3 VOLTS ENGINE Push Push 123456.7 123456.7 To Dispay Total Engine Hours TRIP HOURS Hold HOURS...
  • Page 12 Instruments can be mounted on the dash, usually on the right- hand control panel. 04/08/2005 f090431 Fig. 3.7, Manual-Reset Air Restriction Indicator, Go/ No-Go 02/12/2015 f090514 Fig. 3.6, Air Intake Restriction Indicator NOTE: Rain or snow can wet the filter and cause a temporary high reading.
  • Page 13 Instruments Coolant Temperature Gauge Engine Oil Pressure Gauge NOTICE NOTICE A sudden increase in coolant temperature may A sudden decrease or absence of oil pressure indicate engine or cooling system failure. Bring may indicate mechanical failure. Bring the vehicle the vehicle to a safe stop and investigate the to a safe stop and investigate the cause to pre- cause to prevent further damage.
  • Page 14 Instruments Engine Oil Temperature Gauge NOTICE A sudden increase in oil temperature that is not caused by a load increase may indicate mechani- cal failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the engine until the cause has been determined and corrected.
  • Page 15 Instruments Primary and Secondary Air Pressure Tachometer Gauges The tachometer indicates engine speed in revolutions per minute (rpm) and serves as a guide for shifting WARNING the transmission and keeping the engine in the ap- propriate rpm range. For low idle and rated rpm, see the engine identification plate.

  • Page 16: Overhead Instrument Panel

    If the voltmeter shows an undercharged or over- charged condition for an extended period, have the charging system and batteries checked at an autho- rized Freightliner service facility. On a vehicle equipped with a battery isolator system, the voltmeter measures the average voltage of all the batteries when the engine is running.
  • Page 17 Instruments 04/19/2002 f680028 1. Storage Area with Netting 3. Microphone Clip 2. C/B Radio 4. Dome/Reading Light Assembly Fig. 3.16, Overhead Instrument Panel 3.15...
  • Page 18 Controls Ignition Switch and Key ............4.1 Electrical System .

  • Page 19: Ignition Switch And Key

    CESSORY, OFF, ON, and START. In addition, the electrical wiring on this vehicle without authoriza- same key locks and unlocks the cab doors. tion from Freightliner Engineering. Doing so could damage the electrical system and result in a fire that could cause serious personal injury or property damage.
  • Page 20 Controls headlight, panel light increase/decrease, and the Exterior Light Controls cruise control On/Off and Set/Resume switches. Headlight/Parking Light Switch The headlight/parking light switch (Fig. 4.3) is a paddle switch located on the left-hand control panel above the cruise control switches. When the paddle is lowered, the parking lights illuminate (the front turn signals, the cab marker and identification lights, and the taillights).
  • Page 21 Controls marker light icon and MRKR INT legend are backlit in green. Road Light Switch, Optional The road light (ROAD LAMP) rocker switch operates the optional road lights, which are recessed into the front bumper or mounted on the lower edge of a cut- out in the center of the front bumper.
  • Page 22 Controls On cabs with an overhead console, there is an op- tional overhead dome light assembly containing a diffuse dome and a clear reading light. See Fig. 4.9 for the optional dome/reading lights on the overhead console. 10/15/2001 f610583 Fig. 4.7, Utility Light Switch When the utility lights are on, the diagonal light beam icon is backlit in red.

  • Page 23: Multifunction Turn Signal Switch

    Controls Install the remaining tapping screws. Dome Light Switches In the standard cab, there is one dome light switch in the driver’s door that turns on the diffuse dome light when the driver’s door is opened. In one option, two switches are installed, so that the diffuse dome light turns on when either the driver’s or passenger’s door is opened.

  • Page 24: Horn Controls

    Controls 10/29/2001 f820383 Rotate the control dial away from you to turn the wipers on, or speed them up. 10/17/2001 f820385 Move the lever away from you to turn on the high beams. Rotate the control dial towards you to slow the wipers Move the lever back to its original position to turn them down, or turn them off.

  • Page 25: Powertrain Controls

    Controls The button for the electric horn is located in the cen- inhibit the vehicle from performing an automatic ter of the steering wheel. To sound the horn, press regen. See Fig. 4.16. down on the button. See Fig. 4.14. The style and function of switch will vary with the en- gine make and model.
  • Page 26 Controls 10/17/2001 f610588 1. On/Off Switch 2. HI-LO Switch Fig. 4.18, Engine Brake Switches the ENG BRK legend is backlit in green when the panel lights are on. Exhaust Brake Switch, Optional 09/13/2001 f610510 To turn cruise control on, press the upper half of the On/ The optional exhaust brake is controlled by a dash- Off (rocker) switch.
  • Page 27 Controls umn provides four forward ranges and one reverse range. See Fig. 4.22. 03/31/2009 f610589a Fig. 4.20, Exhaust Brake Switch Engine Fan Switch, Optional The engine cooling fan can be turned on by the en- gine fan switch (ENG FAN legend). The fan will con- tinue to operate for a set amount of time and then turn off unless the coolant temperature is high enough to continue the fan operation.
  • Page 28 five, or six been activated, this indicates an error condition. forward ranges and one reverse range. See Chap- Bring the vehicle to an authorized Freightliner ter 8 for more information about the push-button shift service facility as soon as possible.

  • Page 29: Awd Controls

    TRL) position in the middle for vehicles with a power vated, this indicates an error condition. Bring the take-off (PTO) unit. See Fig. 4.28. vehicle to an authorized Freightliner service fa- For operating guidelines for Meritor MTC transfer cility as soon as possible. cases, see Chapter...

  • Page 30: Braking

    Controls air supply system and release the trailer spring park- ing brakes. Before disconnecting a trailer or when operating a vehicle without a trailer, the red knob must be pulled out. RANGE N−TRL Chapter 9 under the heading "Dual Air Brake System"...

  • Page 31: Other Dash-Mounted Controls

    Controls 10/12/2000 f610454 1. Tractor ABS Indicator 3. Trailer ABS Indicator 2. Wheel Spin Indicator (optional) Fig. 4.31, ABS Indicator Lights Release the foot pedal to lock the steering column in place. See Fig. 4.32. To telescope the steering column, press down on the foot pedal located below the steering column.

  • Page 32: Heater/Air Conditioner Control Panel

    Bring the vehicle to an au- Bench Seat Adjustment Controls thorized Freightliner service facility for testing. The standard bench seat has one control: the seat If the ignition is turned off while the vehicle is in slide lever.
  • Page 33 Controls 10/03/2001 f831452 1. Fan Switch 2. Air Selection Switch 3. Temperature Control Switch Fig. 4.35, HVAC Climate Control Panel, Standard 10/05/2001 f910481 1. Three-Person Seat 2. Seat Slide Lever Fig. 4.36, Full Bench Seat Suspension Seat Adjustment Controls All controls for adjusting air suspension seats are located within easy reach of the occupant.
  • Page 34 Engines Emissions and Fuel Efficiency ............7.1 Diesel Exhaust Fluid and Tank, EPA10 and Newer Engines .

  • Page 35: Emissions And Fuel Efficiency

    Engines Emissions and Fuel Efficiency Model year 2013 and later vehicles meet additional requirements as specified by GHG14 requirements. IMPORTANT: Depending on local jurisdictional Model year 2017 and later vehicles meet similar re- guidelines, vehicles that are domiciled outside of quirements as specified by GHG17 requirements.
  • Page 36 Engines Regeneration lower half of the switch. Regen is then delayed until the switch is no longer active. The harder an engine works, the better it disposes of NOTE: The regen switch can initiate a parked soot. If the exhaust temperature is high enough, a regen only when the DPF lamp is illuminated.

  • Page 37: Diesel Exhaust Fluid And Tank, Epa10 And Newer Engines

    Engines Start and warm the engine until the coolant tem- If the red STOP engine lamp illuminates with the perature is at least 150°F (66°C). blinking DPF lamp and the CHECK engine lamp, begin a parked regen in order to prevent an engine Lift the regen request switch guard and press shutdown.
  • Page 38 Engines IMPORTANT Diesel Particulate Filter (DPF) DPF Regen Needed regeneration is needed. If flashing, regenerate as soon as possible. Engine derate possible. Hot exhaust can cause fire. Hot Exhaust Keep flammables and people away from exhaust. Diesel Exhaust Fluid (DEF) level is DEF Refill Needed low.
  • Page 39 Engines EXHAUST AFTERTREATMENT SYSTEM INFORMATION WARNING INDICATOR STOP CHECK CHECK LAMP(S) (Solid) (Flashing) (Flashing) (Flashing) Level 1 Level 2 Level 3 Level 4 Indicator Lamp Filter Regeneration Filter Regeneration Parked Regeneration Parked Regeneration Required − HEST (High Exhaust Message(s) Recommended Necessary Required −...
  • Page 40 Engines • One bar of the DEF level indicator flashes red—DEF empty, refill DEF • The DEF warning lamp flashes amber • The MIL lamp illuminates Detroit engines: Power is limited, with a 55 mph (90 km/h) speed limit. Cummins engines: Power is limited with progres- sively harsher engine power limits applied.

  • Page 41: Engine Starting

    Engines ULTRA LOW SULFUR ULTRA LOW SULFUR ULTRA LOW SULFUR DIESEL FUEL ONLY DIESEL FUEL ONLY DIESEL FUEL ONLY 11/08/2010 f611037 A. Green bars—DEF level indicators C. One bar flashing red—DEF empty, refill DEF B. One bar illuminated amber—DEF very low, refill DEF 1.

  • Page 42: Cold-Weather Starting

    Engines instruments and see Chapter 4 for detailed in- formation on how to operate the controls. Read the operating instructions in the manufacturer’s engine operation manual before starting the engine. WARNING Never pour fuel or other flammable liquid into the air inlet opening in the air intake in an attempt to start the vehicle.

  • Page 43: Starting After Extended Shutdown Or Oil Change

    Safety and Environmental Considerations Normal Operation All Freightliner diesel engines comply with the re- WARNING quirements of the Federal (U.S.) Clean Air Act. Once an engine is placed in service, the responsibility for meeting local jurisdictional regulations is with the Do not operate the engine in an area where flam-...

  • Page 44: Cold-Weather Operation

    Engines • also the recommended maximum speed of the en- If equipped, turn off the load disconnect switch gine. For further engine-specific information, refer to after the engine is shut down, to prevent bat- the engine manufacturer’s operation manual. tery discharge. •...

  • Page 45: Engine Shutdown

    All Business Class M2 engines are altitude- sonal injury or property damage. compensated by the use of a turbocharger. This re-...
  • Page 46 Engines Shift Knob Controls, Optional Cruise control can also be activated by the optional PAUSE, RESUME, and SET buttons on the transmis- sion shift knob (Fig. 7.17). 09/13/2001 f610510 05/23/95 f260316 To turn cruise control on, press the upper half of the On/ Off switch.

  • Page 47: Power Takeoff (Pto) Governor

    Engines • Power Takeoff (PTO) Governor on wet or slippery pavement, unless the vehicle is equipped with antilock braking system (ABS) and you have had prior expe- Engine power takeoffs (PTO) are devices used to tap rience driving under these conditions; into engine power to run auxiliary devices, such as hydraulic pumps that power additional equipment.
  • Page 48 Engines Since the engine brake is most effective at rated en- depending on DDEC programming. This prevents gine speed, gear selection is very important. Gearing stalling the engine. down the vehicle within the limits of the rated engine Engine Brake Operation speed makes the engine brake more effective.

  • Page 49: Exhaust Braking Systems

    Engines Exhaust Braking Systems and clutch pedals, allows the driver to make maxi- mum use of the exhaust brake in off-highway and Exhaust Brake Switch mountain driving as well as in traffic or high-speed highway driving. The optional exhaust brake is controlled by a dash- When only the exhaust brake is installed, a two- mounted rocker switch to help slow the vehicle when position switch on the dash controls the engine brak-...
  • Page 50 Engines • Road speed usually decreases when the ex- Pacbrake Operation (Caterpillar) haust brake is applied during a descent. When The Pacbrake is controlled by the exhaust brake the vehicle is carrying a heavy load or the switch and the throttle pedal. All applications are ad- grade is extremely steep, you may need to ditionally affected, controlled, or governed by engine apply the service brakes occasionally.
  • Page 51 Engines valve shaft and the attaching locations at each third or fourth gear, should the operator desire. If ad- end of the actuation cylinder. See Fig. 7.21. ditional retarding power is required before the auto- matic downshifting occurs, you can select a lower transmission gear on the Allison shift selector.
  • Page 52 ........8.12 Freightliner SmartShift Shift Control .

  • Page 53: Clutches

    Drivetrain Clutches Coasting With the Clutch Released (pedal down) and the Transmission in Clutch Operation Gear Applying the Clutch Brake WARNING The purpose of the clutch brake is to stop the trans- mission gears from rotating in order to engage the Do not coast with the clutch released (pedal de- transmission gears quickly in making an initial start.

  • Page 54: Allison On-Highway Transmissions

    If fluid level falls below the MIN mark, have the hy- malfunctions, and knowing when to adjust a clutch. draulic system checked for leaks at an authorized Freightliner service facility. Use only DOT 4 brake Clutch Adjustments fluid to fill the reservoir.
  • Page 55 Drivetrain Safety Precautions Without Auto-Apply Parking Brake Follow the instructions for vehicles with 1000 series WARNING transmissions, under the heading "Without Park Posi- tion." Do not leave the vehicle unattended with the en- With Auto-Apply Parking Brake gine running. If you leave the vehicle and the en- gine is running, the vehicle can move suddenly, Bring the vehicle to a complete stop using the which could result in personal injury or property...
  • Page 56 Drivetrain • The TCM will prevent shifts from park or neu- Do not idle in reverse for more than 5 minutes. Se- tral to range when auxiliary equipment, such as lect P (park), PB (auto-apply parking brake), or N a power takeoff unit (PTO), is in operation. (neutral) when time at idle exceeds 5 minutes.

  • Page 57: Allison Md Series

    Drivetrain In the drive position, the transmission will initially go Safety Precautions into first range when drive is selected. As vehicle speed increases, the transmission will upshift auto- WARNING matically through each available range up to fourth range or fifth range. As the vehicle slows, the trans- Do not leave the vehicle unattended with the en- mission will downshift automatically.
  • Page 58 Drivetrain injury or death. Failure to apply the vehicle park- ing brakes when the transmission is in neutral may allow the vehicle to move unexpectedly, pos- sibly causing property damage or personal injury. Press the N button to select neutral. The digital dis- play will display N when neutral is selected.
  • Page 59 Drivetrain overheating and damage. Always select neutral if arrow continuously causes the range position to con- time at idle is longer than 5 minutes. tinue to go down until the button is released or the lowest range is attained. NOTE: The shift into drive may not succeed if a When the transmission is in drive and the down range inhibitor is active.

  • Page 60: Eaton® Fuller® Straight-Shift Transmissions

    Drivetrain parking brake, and idle the engine. Then simultane- ously press both the up and down arrows once. The oil level will display at the end of a two-minute count- down. Diagnostic Codes Diagnostic codes are numerical indications relating to a malfunction in transmission operation.

  • Page 61: Eaton Fuller Range-Shift Transmissions

    Drivetrain NOTE: If the vehicle is moving when shifting, General Information, Range-Shift press the clutch pedal just far enough to disen- Eaton Fuller 9-Speed Models gage the clutch. Pressing it to the floor will en- gage the clutch brake, if so equipped, causing Eaton Fuller 9-speed range-shift models are not syn- premature clutch brake wear.
  • Page 62 Drivetrain LO−LO 03/12/96 f260123a 02/03/2017 f261053 Fig. 8.8, Shift Pattern, Deep Reduction A. HI Range B. LO Range Operation, Range-Shift Fig. 8.7, Shift Pattern, 10-Speed Models When operating off-highway or under adverse Once the highest shift lever position (fifth gear) is conditions, always use low gear when starting to reached in LO range, the driver preselects the range move the vehicle.
  • Page 63 Drivetrain Upshifting and bring the air system pressure up to 95 to 125 psi (655 to 862 kPa). Position the gear shift lever in neutral. Start the Position the range preselection lever down, into engine and bring the air system pressure up to low range.

  • Page 64: Eaton Fuller Autoshift Automated Transmissions

    Drivetrain passes through neutral, the auxiliary section will automatically shift from high to low range. While in the low range, continue downshifting from 4th through LO as conditions require, al- ways double-clutching between gears. Do not downshift into LO-LO from LO unless op- erating conditions make it necessary.
  • Page 65 See the instructions for shifting under heading IMPORTANT: If the vehicle starts up in any gear "Manual Mode" below. but neutral, bring the vehicle to an authorized Freightliner service facility as soon as possible. 8.13...

  • Page 66: Freightliner Smartshift Shift Control

    Drivetrain To select neutral, press the clutch pedal to the floor. Freightliner SmartShift Shift Then press the N button. Set the parking brakes and Control slowly release the clutch pedal. General Information, SmartShift NOTE: Neutral is always available during ve- hicle operation.

  • Page 67: Eaton Fuller Ultrashift Automated Transmissions

    Drivetrain 11/11/2002 f270080 02/02/2017 f270120 To upshift manually, pull the lever up (towards you). To To upshift manually, pull the lever up (towards you). To downshift manually, push the lever down (away from downshift manually, push the lever down (away from you).
  • Page 68 Drivetrain is offered only on this automated transmission sys- tem. Operation, UltraShift Power Up NOTE: These operating instructions apply equally to six-speed UltraShift ASW and ten- speed UltraShift DM, with the exceptions ex- plained below. With the parking brake set, select neutral (N) by moving the selector switch to the N position.
  • Page 69 Drivetrain Select neutral (N) by moving the selector switch to the N position. When the "N" on the gear indi- cator is solid, rather than flashing, the UltraShift TCU is ready to power down. See Fig. 8.13. With the transmission in neutral, set the parking brake.
  • Page 70 Drivetrain the driver must be alert to vehicle speed by down- On ten-speed UltraShift DM only, if necessary to rock shifting and/or using the service brake. the vehicle, use the selector switch to shift back and forth at low speed between reverse and drive. A shift request will still be refused if the selected gear would cause engine overspeed or excessive lugging.
  • Page 71 Drivetrain Before shutting down the engine, return the selector If L is selected from neutral while stopped, the ve- switch to "N." When the ignition is turned off, the hicle starts up in first gear and stays there until the transmission will reset to neutral in a few minutes engine approaches overspeed.
  • Page 72 To stop calibration at any time, select one of the If the problem continues, contact an authorized drive positions on the selector switch (R, D, or L). Freightliner or Eaton service facility. Clutch Protection Fault Locked In Gear If the transmission becomes locked in gear, a dash Excessive clutch slippage creates heat and reduces (–) will appear on the gear indicator when the vehicle...

  • Page 73: Eaton Fuller Ultrashift Plus Automated Transmissions

    Turn off the ignition, and shut down the engine. If the gear indicator continues to display a dash, con- tact an authorized Freightliner or Eaton service facil- Reverse (R) ity. NOTE: If attempting to select a non-Neutral...
  • Page 74 Drivetrain using the SmartShift control, provided the selected Manual Mode Override gear would allow the vehicle to launch without dam- The system is equipped with a manual mode over- aging the transmission. If the start gear is changed ride function. If the vehicle is being "back driven" (for using the SmartShift control, it will be the default until example, descending a grade and vehicle speed ex- the vehicle is powered down or the selection is...
  • Page 75 Drivetrain not being pressed) or close the clutch (if the throttle Exiting Creep Mode pedal is being pressed). If the abuse continues, the To exit Creep Mode, apply the throttle pedal to accel- system will open the clutch and take away throttle erate temporarily, or select a higher gear in Manual control briefly to allow the clutch to cool down.

  • Page 76: Mercedes-Benz Manual Transmissions

    Drivetrain Skip Shifting braking system increases with throttle: low throttle allows the system to brake the wheels earlier; heavy/ When appropriate, the UltraShift PLUS system may full throttle raises the point of the acceptable wheel skip shift in Drive. When prevailing conditions like slip.

  • Page 77: Mercedes-Benz Automated Transmissions

    With the transmission in neutral, turn on the igni- nearest Freightliner dealer or other qualified ser- tion switch. The "CHECK TRANS" and "TRANS vice provider for roadside assistance. To prevent TEMP"...
  • Page 78 Drivetrain (downhill start, vehicle unloaded or lightly If the current gear indicator flashes "PB" when the engine is shut down, set the parking brake loaded), pull up on the SmartShift lever when and move the selector switch to "N." the current gear indicator displays "1." Automatic and Manual Modes On a level grade, press down on the throttle pedal to allow the vehicle to move forward.
  • Page 79 Drivetrain transmission will shift automatically through the for- When braking or slowing in MAN, downshift as nec- ward gears. essary to prevent lugging the engine when speed is resumed. If the vehicle comes to a complete stop, If driving conditions require, it is still possible to re- the TCU resets the transmission to neutral.
  • Page 80 Drivetrain As in a manual transmission, upshifting too early WARNING causes engine lugging and uneven operation. To achieve smooth operation in MAN mode, upshift Do not coast in neutral. Coasting in neutral can when the engine speed reaches approximately 2000 cause an accident, possibly resulting in severe revolutions per minute (rpm).

  • Page 81: Meritor Drive Axles

    With differential lock on, the turning radius is Bring the vehicle at once to a safe stopping place increased and vehicle handling is affected. The differ- and call an authorized Freightliner service facility for ential lock switch (Fig. 8.21) allows the driver to lock assistance.
  • Page 82 30 seconds, the lock mechanism may not be fully engaged/disengaged. Bring the vehicle to an autho- 02/03/2017 f350079a rized Freightliner service facility for testing. A. Turning Radius When the Differential Lock is Differential Lock Operation Engaged (understeer condition) B. Turning Radius When the Differential Lock is...
  • Page 83 Abnormal Response: If the LED blinks for more than 30 seconds, the lock mechanism may not be fully engaged/disengaged. Bring the vehicle to an autho- rized Freightliner service facility for testing. 10/26/2001 f610595 Interaxle Lock Operation Fig. 8.23, Interaxle Lock Switch...
  • Page 84 Bring the vehicle to an authorized Freightliner service facility as soon as possible. Axle Shift When the axle shift switch is pressed, three re-...

  • Page 85: Transfer Cases

    Drivetrain Transfer Cases Engaging and Disengaging the Steer Axle Meritor MTC Series Dash-mounted switches control the transfer case Some vehicles are equipped with a Meritor MTC Se- functions; see Chapter 4 for more information. ries transfer case for part-time 4x4, 6x6, or 8x8 op- IMPORTANT: The wheels must not slip during eration.
  • Page 86 Drivetrain If the shifter does not engage when shifting from HIGH RANGE to LO RANGE, shift the transmis- sion into REVERSE, then NEUTRAL, and apply light torque to engage the LO RANGE. Engaging PTO Some vehicles are equipped with a PTO mounted to a Meritor MTC transfer case.

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