VIMS® TKPH/TMPH Monitoring{4203, 7601} Caterpillar

Off-Highway Truck/Tractor:

784C (S/N: 2PZ1-UP)

785C (S/N: APX1-UP; 5AZ264-UP)

785D (S/N: MSY1-UP)

789C (S/N: 2BW303-UP)

789D (S/N: SPD1-UP; SHH1-UP)

793C (S/N: CBR1-UP; ATY1-UP)

793D (S/N: FDB1-UP)

793F (S/N: SND1-UP; SSP1-UP; RBT1-UP)

795F Series AC (S/N: ERM1-UP)

797 (S/N: 5YW1-UP)

797B (S/N: JSM1-UP)

797F (S/N: LAJ1-UP; WSP1-UP)

Introduction

Tonnes Kilometer Per Hour (TKPH Metric) / Tons Mile Per Hour (TMPH English) is a measurement that is used by tire manufacturers. TKPH/TMPH measures the ability of a tire to carry a load over time. If the TKPH/TMPH value for a particular tire is exceeded, the tire overheats causing reverse vulcanization that can lead to separation of the tire. The Caterpillar TKPH/TMPH Monitor is a feature that resides within the onboard VIMS^®. The functionality only exists on machines that have 4.0 hardware with 10.5 (available 4Q 2005) or newer onboard software. The feature was designed for different applications, manufacturers, and requests of customers. The feature uses Cat Electronic Technician (Cat ET) 2005B and up, and VIMS PC to configure the settings for TKPH/TMPH Monitoring.

Note: Early VIMS 3.0 hardware machines that have been retrofitted with 4.0 hardware and with 10.5 (available 4Q 2005) software may not have identical capabilities. Machines with EPTC II will see an event, but speed will not be limited. Machines with a MAC 14 Transmission Control will function the same as current production machines function.

Note: To configure TKPH/TMPH Monitoring correctly, there must be involvement from the customer and the dealer.

Requirements

• Maintenance procedure of the suspension cylinder.

• Caterpillar Payload Study prior to setup.

• Tire manufacturers recommended TKPH/TMPH specifications.

• Dealer support / involvement.

• Customer support / involvement.

• VIMS setup knowledge.

• 10.5 (available 4Q 2005) VIMS software and VIMS 4.0 hardware.

• Lists of the attachment codes shown in Tables 1 and 2.

• Cat ET 2005B and up.

Instructions For Setup

With the Message Center displaying Date, Time, Service Meter Hour and Odometer perform the following:

1. Connect VIMS PC to the machine.

2. Enter the following into the onboard keypad:

   1. ATTACH (288224).

3. Press the "OK" key.

Show/hide table



Illustration 1	g01166398

4. The message center will display "ENTER ATTACH CODE". (Refer to Illustration 1):

5. Enter an attachment code (Refer to Table 1 or 2).

   1. If the attach code entered is valid, you will be prompted to enter the code again (go to Step 6).

   2. If the attach code entered is not valid, you will be returned to the main screen on the display. Check to see if the attach code is correct and start again (go to Step 2).

6. The message center will ask you to enter the attach code again (Refer to Illustration 1).

7. Enter the same attachment code. Entering the same attachment code ensures that you really want the attachment code added.

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Illustration 2	g01172917
Tonnes Kilometer Per Hour (TKPH Metric) / Tons Per Hour (TMPH English) "Machine Weight Speed Averaging Duration " Rolling database time is recommended to be 4 hours. "Empty Machine Weight" Information gathered during a payload study. "Empty Machine Rear Axle Weight Distribution" Information gathered during a payload study. "Loaded Machine Rear Axle Weight Distribution" Information gathered during a payload study. "Machine Speed Limit Activation Front Tires Weight-Speed Threshold" TKPH/TMPH trigger value, usually start with the tire manufacturer numbers. "Machine Speed Limit Deactivation Front Tires Weight-Speed Threshold" recommended 100 less than the TKPH/TMPH trigger value. "Machine Speed Limit Activation Rear Tires Weight-Speed Threshold" TKPH/TMPH trigger value, usually start with the tire manufacturer numbers. "Machine Speed Limit Deactivation Rear Tires Weight-Speed Threshold" recommended 100 less than TKPH/TMPH trigger value. "Machine Speed Limit" When active, what is the set speed limit you desire?

8. Connect to the machine with Cat ET. Select the VIMS main ECM, select Service Configuration to display the following screen (Refer to Illustration 2):

9. Once all documentation is gathered, simply highlight the areas and click "Change" at the lower left side of the screen. Refer to the Product Support Checklist.

10. Once the adjustments are made, it is recommended that the tire manufacturer conducts a tire heat test and compare the values from the heat test to the values within VIMS. VIMS will provide real-time values when you perform the following:

    1. Enter parameter # 983 gauge key for the TKPH/TMPH Front.

    2. Use the ">" key to view parameter # 984 TKPH/TMPH Rear.

Usage and Adjustments

The TKPH/TMPH Monitoring and Control System in VIMS is based on the standard TKPH/TMPH calculations that are found in the technical tire data books for the specific tire manufacturer. VIMS modifies the algorithm in the following ways:

• Data for the payload weight and data for the distance traveled are recorded once every minute. The distance traveled data and the payload data are stored as part of a rolling database. The database currently has a time base that can be adjusted from 1 to 8 hours. This time base will be increased to 18 hours with VIMS version 10.5 software. Only the movements of the machine for the time base of the trucks operation are used to calculate real-time TKPH/TMPH. The payload and distance traveled data is then averaged for the time base and used to calculate the real-time TKPH/TMPH value.

• For each minute that the machine is "Keyed Off", a value of zero will be inserted into the database for the distance traveled and for the payload weight.

• TKPH/TMPH makes adjustments for the time the machine is traveling loaded or traveling empty. When the machine is traveling empty, it is typical for the front and the rear axles to bear equal amounts of the machine weight. However, generally the front tires will have the higher TKPH/TMPH values generated while traveling empty. When the machine is loaded, one third of the weight will be on the front axle. This will result in a closer alignment of the front and rear TKPH/TMPH values.

• A factor that is not included in the TKPH/TMPH calculations is the maximum distance that a tire can travel in 1 hour. This is especially important to remember in cold weather. Contact the tire manufacturer if the maximum distance allowed in 1 hour changes when the temperature drops. If the maximum distance does not change, then lower TKPH/TMPH values will be generated and could allow the operator to travel farther than should be allowed.

• The published TKPH/TMPH values from the tire manufacturer are the TKPH/TMPH upper limit trigger point. A value that is 100 TKPH/TMPH less than the upper limit for deactivating the trigger point is recommended. The greater the averaging duration (rolling data base) is, the longer it will take for the TKPH/TMPH values to change. This longer time could result in an operator becoming speed limited for half an hour or more.

• When the truck becomes Speed Limited, the operator will have control of the machine speed until the machine speed falls below the TKPH/TMPH Limiting Speed. Once the speed is below the TKPH/TMPH Limiting Speed, the operator will have control of the machine speed up to the Limiting Speed value. This was done in order to have full range of the machine top speed. When the TKPH/TMPH values become lower than the set deactivation value, the operator will be prompted to press the "OK" key on the keypad. Pressing the "OK" key will turn off Speed Limiting and return the machine to the normal speed operation.

Event Operation and Timing

Illustration 3	g01169453

If the TKPH/TMPH values remain above the activation threshold for 1 minute, the following will be displayed on the message center (Refer to Illustration 3):

Approximately 9 minutes after the message shown in Illustration 3 is initially displayed (if the TKPH/TMPH value does not drop below the activation threshold), the following will happen:

• TKPH/TMPH Speed Limiting will become active.

• The following will be displayed in the message center (Refer to Illustration 4):

Illustration 4	g01169493

Note: The nine minute interval after the TKPH/TMPH warning appears (Refer to Illustration 3) provides the operator time to reduce the TKPH/TMPH value to a value below the activation threshold. This reduction of the TKPH/TMPH value is accomplished by reducing the truck speed before the truck becomes Speed Limited.

If the truck becomes Speed Limited, it will remain Speed Limited until one of the following happens:

• Any level 3 event becomes active (at which time TKPH/TMPH Speed Limiting will be immediately deactivated).

• The TKPH/TMPH values fall below the deactivation threshold for 1 minute.

Illustration 5	g01169503

If the TKPH/TMPH values fall below the deactivation threshold, the following message will appear for approximately 1 minute (Refer to Illustration 5):

Press the "OK" key in order to clear the above message (Refer to Illustration 5).

Note: The following message will be displayed in about 30-45 seconds (Refer to Illustration 6) after the "OK" key has been pressed:

Illustration 6	g01169505

This last message (Refer to Illustration 6) will remain for 30 seconds. If the "OK" key is not pressed within this 30 seconds, this message (Refer to Illustration 6) will reappear at 1 minute intervals for 30 seconds at a time. TKPH/TMPH Speed Limiting will be immediately deactivated once the "OK" key is pressed.

Questions

Any questions can be directed through the local DSN or through the VIMS product support. For VIMS / DSN Support contact your local technical communicator.