Use this procedure to check all systems and functions on the machine. It is designed so you can make a quick check of the operation of the machine while doing a walk around inspection and performing specific checks from the operator's seat.

Should you experience a problem with your machine, you will find helpful diagnostic information in this checkout that will pinpoint the cause. This information may allow you to perform a simple adjustment which will reduce the downtime of your machine. Use the table of contents to help find adjustment procedures.

The information you provide after completing the operational checkout will allow you or your authorized dealer to pinpoint the specific test or repair work needed to restore the machine to design specifications.

A location will be required which is level and has adequate space to complete the checks. No tools or equipment are needed to perform the checkout.

Complete the necessary visual checks (oil levels, oil condition, external leaks, loose hardware, linkage, wiring, etc.) prior to doing the checkout. The machine must be at operating temperature for many of the checks.

Before starting this operational checkout, check diagnostic service codes in monitor. These service codes must be corrected or cleared before starting this checkout.

Start at the top of the left column and read completely down column before performing check, follow this sequence from left to right. In the far right column, if no problem is found (OK), you will be instructed to go to next check. If a problem is indicated (NOT OK), you will be referred to either a section in this manual or to your authorized dealer.

TX03679,00017F7 -19-07AUG01-1/1

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Hour Meter and Battery Voltage Check

Key Switch in OFF position.

Push and hold the SELECT button.

YES: Go to next check.

NO: Check Battery Voltage Input and Auxiliary Power Fuse F9. See your authorized dealer.

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Monitor Bulb Check

Turn the key switch from OFF to ON position.

• Stop light is flashing with no buzzer.
• Engine oil pressure light.
• Engine alternator voltage light.
• Park brake light.
• Park brake pressure light.
• HFWD charge pressure light (if equipped).
• Hour meter is in display window.
• Fasten seat belt light.
• All gauges have one segment lit.

YES: Go to next check.

NO: See your authorized dealer.

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Transmission Park Brake Indicator and Reverse Alarm Check

Turn key switch to ON position.

Park brake indicator light must come on.

Move transmission control and park brake lever to neutral, then all forward and reverse positions.

Reverse alarm sound in reverse gears?

Go to next check.

See your authorized dealer.

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Check Stored Service Codes

Check for stored service codes. Record and delete any service codes.

Refer to Historical Service Code Retrieval in Troubleshooting.

Go to next check.

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Neutral Start Check

Ensure that machine is on level surface and away from anything that may be in the way in case of unexpected movement.

Put transmission control and park brake lever in neutral position.

Turn key switch to START.

Starting motor MUST NOT crank engine.

NOTE: Starter motor may click when key is turned to START. But it will not crank and start the engine. This is a normal condition.

NOTE: Service code F321 will be created by this check. Clear and ignore the code.

Repeat in each gear position, forward and reverse.

Go to next check.

See your authorized dealer.

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Monitor Indicator Check

Place transmission control and park brake lever in PARK position and start engine.

Check the monitor display while running.

LOOK: Only the park brake indicator light should be on when in park.

LOOK: All gauges should be working.

LOOK: "P" should show in the monitor display. When starting the engine the display defaults to the gear position unless there is an active service code on startup.

Go to next check.

See your authorized dealer.

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Hydraulic Functions Check

NOTE: This check also should be used to warm up hydraulic oil for this checkout procedure. Cycle functions several times.

Run engine at high idle

Check all hydraulic functions:

• Saddle lock
• Left and right blade lift
• Wheel lean
• Rear steer
• Circle rotate
• Blade tilt
• Blade side shift
• Scarifier and ripper-If equipped

LOOK: Do saddle lock and rear steer position indicators work when function is actuated?

LOOK: Direction of travel indicated on the controls must correspond with equipment travel. Equipment travel should be continuous and smooth.

FEEL: Levers must return to neutral when released. Left and right blade lift and scarifier valve have a float position. When positioned fully forward, these levers must remain in float detent until manually removed.

Go to next check.

See your authorized dealer.

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Steering Valve Check

Run engine at low idle. Turn steering wheel until wheels hit the right stop and then the left stop.

Observe effort to turn steering wheel.

LOOK: Front wheels must steer smoothly in both directions. When the steering wheel is stopped, the front wheels must stop. Excessive effort MUST NOT be required to turn the steering wheel.

Go to next check.

See your authorized dealer.

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Low RPM Calibration Check

Start machine and run at low idle in park.

LOOK: Is low idle displayed correctly?

MACHINES WITH ENGINE CONTROLLERS:

NOTE: When cold, low idle starts at 1000 rpm. When warms up, it goes to 800 rpm.

• 670CH, 672CH with isochronous enabled: 800 ± 25 rpm

MACHINES WITHOUT ENGINE CONTROLLERS:

• 670C-800 rpm

Go to next check.

Go to Calibrate Tachometer in Troubleshooting.

Go to Adjust Engine Speed Linkage, see your authorized dealer.

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High Idle Check

Check high idle in park.

High idle specification is 2125-2160 rpm.

Go to next check.

Adjust Engine Speed Linkage. See your authorized dealer.

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Transmission, Inching Pedal and Shift Handle Checks

Depress inching pedal.

Shift machine into first forward.

Slowly release inching pedal.

LOOK/FEEL: Machine will start to move when pedal is approximately 1 in. from cab floor.

Slowly release pedal all the way up.

With tractor moving, slowly depress inching pedal.

LOOK/FEEL: Machine transmission should start to modulate after pedal is depressed approximately one inch.

Drive machine shifting transmission into eight forward and eight reverse gears.

NOTE: Watch the gear display and if all gears are indicated with no service codes, then you know that the shifter handle works and the TCU shifter inputs are working correctly.

Excessive gear noise MUST NOT be heard in any gear.

FEEL: Must feel eight distinct detents in forward and in reverse. Lever must move freely between detents and in and out of neutral.

Move lever to park position "P" and release.

FEEL: Lever in park position "P" must be held in notch by safety locking collar.

Go to next check.

See your authorized dealer.

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Brake Accumulator Precharge Check

Run engine for 30 seconds to fill brake accumulator.

Stop engine.

LOOK: The low pressure indicator light (B) must be off.

Turn key switch to ON position.

Push brake pedal (A) at 5 second intervals until low brake pressure indicator light (B) comes on.

NOTE: Red STOP indicator light will be on during this check due to low engine oil pressure with engine off.

LOOK: The light must come on after 3 or 4 applications.

Go to next check.

See your authorized dealer.

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Service Brake Capacity Check

Run engine at high idle.

Must take rear and front wheels off the ground with differential lock OFF. (Do not run for more than 1 minute.)

Operate machine in 4th gear forward.

Apply brakes to load engine.

LOOK/LISTEN: Brakes must be able to slow machine until engine is "lugged" down to approximately 800 rpm.

Go to next check.

See your authorized dealer.

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Differential Lock Check

CAUTION: Prevent possible injury. Machine will move during this test. Be sure area is clear.

Use blade to raise rear wheels on one side only. Front wheels must stay on ground.

If an HFWD model, ensure that HFWD is OFF.

Place differential lock switch to differential lock ON position.

LOOK: Differential lock indicator comes ON.

Depress inching pedal and shift transmission to forward position "F1".

Slowly release inching pedal until rear wheel motion begins-machine WILL move. Immediately depress inching pedal to stop motion.

LOOK: Raised wheels must NOT turn unless ALL rear wheels are turning.

Check for service codes.

Go to next check.

See your authorized dealer.

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HFWD On/Off and Inching Switch Check-If Equipped

CAUTION: Make sure differential lock is turned OFF.

IMPORTANT: Do not operate machine above 1st gear with one set of tandems off the ground for more than 1 minute. Damage to differential can result from heat buildup.

NOTE: Wheels may surge when initially engaged.

Move throttle to approximately 1800 rpm.

Turn HFWD switch ON and inching mode switch OFF.

Move transmission control and park brake lever to first forward position. Operate for a minimum of 30 seconds.

LOOK: Does HFWD On/Off switch light up?

LOOK: Front wheels turn on and off at top of inching pedal.

LOOK: Both front wheels will turn forward at approximately 1/2 the speed of the raised tandems.

LOOK: Front wheels should turn smoothly without surging.

Turn inching mode switch ON.

LOOK: Does switch light up?

LOOK: Front wheels turn modulate with rear wheels when inching pedal is depressed and released.

Repeat procedure in first reverse.

Go to next check.

See your authorized dealer.

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HFWD Wheel Torque Check-If Equipped

CAUTION: Ensure that machine is on level surface and away from anything that may be in the way in case of unexpected movement.

NOTE: If a front wheel is not capable of generating torque it will come to a stop on contact with the ground.

Slowly lower front wheels to ground, then raise back off ground.

LOOK: On contact with ground, both wheels must develop torque.

Repeat procedure in first reverse.

Go to next check.

See your authorized dealer.

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HFWD Aggressive Switch Check-If Equipped

Increment the HFWD aggressiveness mode switch to position 15.

LOOK: The front wheels should surge each time the switch is incremented.

Repeat procedure in first reverse.

Go to next check.

See your authorized dealer.

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Cycle Time Check

NOTE: Hydraulic oil

Run engine at high idle.

Operate each function through a complete cycle.

Function	Operating Conditions	Cycle Time (Seconds)
Blade Raise	305 mm (12 in.) of rod travel on one cylinder.	1.8-2.8
Blade Lower	305 mm (12 in.) of rod travel on one cylinder.	2.3-3.3
Circle Side Shift	Right and left	5-6
Blade Side Shift	Right and left	8-10
Blade Tilt	Extend and retract	2.5-3.5
Circle Rotate	90° rotation right and left	15 max.
Wheel Lean	Right and left	2-3
Rear Steer	Right and left machine moving in first gear.	6 max.
Scarifier Lower	Without shanks	3-4.5
Scarifier Raise	Without shanks	4.5 max.
Ripper Lower	With shanks	2-3
Ripper Raise	With shanks	2-3

 

Go to next check.

See your authorized dealer.

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Check Stored Service Codes

Check for stored service codes. Record and delete any service codes.

Refer to Historical Service Code Retrieval in Troubleshooting.

Do Service Codes exist?

Go to next check.

See your authorized dealer.

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Cab System Checks

Turn Key Switch ON.

Check the following components for proper function:

• Seat adjustments
• Tilt pedestal
• Horn switch
• Hazard switch
• Turn signal switch
• Interior lights
• Blower fan
• Heater and air conditioner
• Under seat heater-if equipped
• Front and black windshield wipers and washers
• Defrost fans
• Lower window wipers and washers

Go to next check.

See your authorized dealer.

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Visual Inspection

Turn on all lights and hazard signals.

NOTE: This procedure requires walking around the machine and making a visual inspection.

LOOK: Check for fluid leaks and loose or broken parts.

Walk around and check the condition and operation of:

• Signal lights and lenses
• Brake lights and lenses
• Work and drive Lights
• Side shields and latches
• Hoses, clamps and wiring harnesses
• Door and cab latches
• Hood and access doors
• Fan shroud and fan guard
• Fan direction

Are lines and hoses straight, NOT kinked or worn from rubbing on other machine parts or "weather checked"?

Are hose and line connections clean, NOT showing signs of leakage, such as oil or dust accumulation at fittings?

Check is complete.

See your authorized dealer.

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