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Introduction
Important Safety Information
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| Illustration 1 | g02139237 |
Think Safety | |
European Union Compliant, CE marked
Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly.
Improper operation, lubrication, maintenance, or repair of this product can be dangerous and could result in injury or death.
Do not operate or perform any lubrication, maintenance, or repair on this product until you have read and understood the Tool Operating Manual.
Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.
The hazards are identified by the "Safety Alert Symbol" and followed by a "Signal Word" such as "DANGER", "WARNING", or "CAUTION". The Safety Alert "WARNING" label is shown below.
A non-exhaustive list of operations that may cause product damage are identified by "NOTICE" labels on the product and in this publication.
Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are, therefore, not all inclusive. If a tool, procedure, work method, or operating technique that is not recommended by Caterpillar is used, the operator must be sure that the procedures are safe. The operator must also be sure that the product will not be damaged or made unsafe by any unspecified procedures.
The information, specifications, and illustrations in this publication are based on information that was available at the time that the publication was written. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete and most current information before you start any job.
When replacement parts are required for this product Caterpillar recommends using Caterpillar replacement parts or parts with equivalent specifications including, but not limited to, physical dimensions, type, strength, and material.
Literature Information
This manual contains safety information, operation instructions and maintenance information and should be stored with the tool group
Some photographs or illustrations in this publication may show details that can be different from your service tool. Guards and covers might have been removed for illustrative purposes.
Continuing improvement and advancement of product design might have caused changes to your service tool, which are not included in this publication.
Whenever a question arises regarding your service tool or this publication, consult Dealer Service Tools (DST) for the latest available information.
Safety Section
The Safety section lists basic safety precautions.
Read and understand the basic precautions listed in the Safety section before operating or performing maintenance and repair on this service tool.
General Information Section
The General Information section describes tooling functions and features. The section provides useful information on individual parts, additional tooling, and resources.
Operation Section
The Operation section is a reference for the new operator and a refresher for the experienced operator.
Photographs and illustrations guide the operator through correct procedures for using the tool group.
Operating techniques outlined in this publication are basic. Skill and techniques develop as the operator gains knowledge of the service tool and the tools capabilities.
Maintenance Section
The Maintenance section is a guide to tool inspection, cleaning, storage, and tool disposal
Service Parts Section
The Service Parts section is a reference for parts identification and available part numbers.
Safety Icon Nomenclature
Personal Protection/Important Information
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| Illustration 2 | g02166423 |
Personal Protection/Important Information | |
Prohibited Action
| No smoking |
Hazard Avoidance
| Crushing hazard (foot) |
| Crushing hazard (hand) |
| Pinch point |
| Fire hazard |
| Electrical Shock - Hazard |
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| Fire hazard |
General Information Section
Introduction
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| Illustration 3 | g02798413 |
9U-7370 Belt Tension Tester | |
9U-7370 Belt Tension Tester provides the user with the ability to measure the nitrogen gas pressure in the belt tension cylinder used on the "C", "D", and "E" Series Challenger Ag Tractors. The tester provides power to the transducer used on the cylinders. A 6V-7070, 9U-7330, or 146-4080 Multimeter is required to display the output from the pressure transducer.
Tables 2 and 3 or the Table on the back of the 9U-7370 Belt Tension Tester provides voltage/pressure/temperature relationship.
The cables provided with the tester allow measurements to be taken through the vehicle wiring harness or directly at the transducer.
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| Illustration 4 | g02798747 |
Belt Tension Tester Group (1) 9U-7370 Belt Tension Tester (2) 9U-7368 Cable Assembly (3) 9U-7369 T-Cable (4) Tool Operating Manual NEHS0600 (not shown) | |
Additional Contact Information
For additional product support questions concerning this tool, contact the Caterpillar Dealer Service Tools Hotline at:
USA: 1-800-542-8665, Option 1International:: 1-309-578-7372Specifications
| Specifications | ||
| Input | Output | Battery Life |
| -0 to 5 VDS | -0 to 5 VDS | 25 hours |
Connections
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| Illustration 5 | g02798759 |
DC Voltmeter Connections (1) Tip Jacks - Used to measure the output of pressure transducer under test. | |
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| Illustration 6 | g02798763 |
Battery and Input Connections (1) Internal battery connections - Tip jacks used to measure the internal battery voltage (2) Input connector - Connection for the 9U-7368 Cable | |
This cable provides access to the pressure transducer being tested. The cable can be connected either through the machine wiring harness (using 9U-7369 T-Cable ) or directly to the pressure transducer.
Maintenance
Battery Replacement
To replace the 1U-9534 Battery :
- Remove six screws that secure the back cover.
- Replace the battery.
- Replace the back cover and secure in place with six screws.
Care and Cleaning
The 9U-7370 Belt Tension Tester is a durable hand held instrument. However, since tester will be used outdoors in a wide range of conditions, care must be taken to protect and keep Tester clean.
The case is water-resistant, but not waterproof. The tester can be damaged if water is allowed to enter the case. If moisture (water) enters the case, the tester should be allowed to dry out before reusing. Remove the rear cover and allow unit to dry out completely in a warm, dry area.
| NOTICE |
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DO NOT use aromatic hydrocarbons or chlorinated solvents for cleaning. These chemicals will react with the plastics used on the case and cause damage. |
Operating Instructions
This unit can test cylinders on the Challenger 65C, 65D, 65E, C70C, 75C, 75D, 75E, 85C, 85D, 85E, and 95E. To test the tension cylinders:
- Locate the wiring harness connecting the pressure transducers to the monitor in the cab.
- Disconnect the harness at the 8-pin Deutsch connector, and insert the 9U-7369 T-Cable .
- Connect a multimeter to the front panel tip jacks of the tester. Set the multimeter to measure 5 VDC.
- Connect the 9U-7369 Cable to the 9U-7368 T-Cable connector labeled "LEFT" or "RIGHT" depending upon which cylinder is tested first.
- Press the "Press to Test" button on the front panel and read the voltage displayed on the multimeter. Find the corresponding pressure for the voltage measured either on the back of the 9U-7370 Belt Tension Tester or in Tables 2 and 3.
Note: Table 2 is used for all early model Challengers and Table 3 is used for 65D, 75C, and 85C Models.
Show/hide tableTable 2 Belt Tension Cylinder Nitrogen Charge Pressure and Temperature Relationship
(Early Challenger Models)Volts (DC) Pressure Temperature 2.06 1110 kPa (161.0 psi)
−40° C (−40.0° F)2.10
1137 kPa (164.9 psi)
−34° C (−29.2° F)2.14
1165 kPa (169.0 psi)
−28° C (−18.4° F)2.18
1192 kPa (172.9 psi)
23° C (73.4° F)2.22
1220 kPa (177.0 psi)
−17° C (1.4° F)2.27
1254 kPa (181.9 psi)
−12° C (10.4° F)2.32
1282 kPa (186.0 psi)
−7° C (19.4° F)2.36
1310 kPa (190.0 psi)
−1° C (30.2° F)2.40
1337 kPa (193.9 psi)
4° C (39.2° F)2.44
1365 kPa (198.0 psi)
10° C (50.0° F)2.49
1400 kPa (203.1 psi)
16° C (60.8° F)2.54
1427 kPa (207.0 psi)
21° C (69.8° F)2.58
1455 kPa (211.0 psi)
27° C (80.6° F)2.62
1482 kPa (215.0 psi)
32° C (89.6° F)2.66
1510 kPa (219.0 psi)
38° C (100.4° F)2.70
1538 kPa (223.1 psi)
43° C (109.4° F)2.74
1565 kPa (227.0 psi)
49° C (120.2° F)2.78
1592 kPa (230.9 psi)
54° C (129.2° F)Show/hide tableTable 3 Tensioner Cylinder Voltage Charge Pressure and Temperature Relationship
(65D, 75C and 85C Models)Volts (DC) Pressure Temperature 2.74
1564 kPa (226.8 psi)
−40° C (−40.0° F)2.79
1591 kPa (230.8 psi)
−34° C (−29.2° F)2.83
1619 kPa (234.8 psi)
−28° C (−18.4° F)2.87
1647 kPa (238.9 psi)
23° C (73.4° F)2.91
1674 kPa (242.8 psi)
−17° C (1.4° F)2.95
1702 kPa (246.9 psi)
−12° C (10.4° F)2.99
1729 kPa (250.8 psi)
−7° C (19.4° F)3.04
1757 kPa (254.8 psi)
−1° C (30.2° F)3.08
1784 kPa (258.8 psi)
4° C (39.2° F)3.12
1812 kPa (262.8 psi)
10° C (50.0° F)3.16
1840 kPa (266.9 psi)
16° C (60.8° F)3.20
1867 kPa (270.8 psi)
21° C (69.8° F)3.24
1895 kPa (274.9 psi)
27° C (80.6° F)3.29
1922 kPa (278.8 psi)
32° C (89.6° F)3.33
1950 kPa (282.8 psi)
38° C (100.4° F)3.37
1977 kPa (286.7 psi)
43° C (109.4° F)3.41
2005 kPa (290.8 psi)
49° C (120.2° F)3.45
2032 kPa (294.7 psi)
54° C (129.2° F)The allowable tolerance on nominal pressure is ±
35 kPa (5.1 psi).
Note: The pressures listed in Tables 2 and 3 are normal values for cylinders mounted on a machine. Do not use the pressures if the cylinder is not mounted on the machine or if the belts have been removed.
- When testing is complete, remove the 9U-7369 T-Cable from the machine wiring harness and reconnect the monitor in the cab to the machine wiring harness.
Changing the Battery Saver Interval
To change the time interval for the battery saver (auto shut-off timer length):
- Remove the back cover and locate the potentiometer shown in Figure 7.
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| Illustration 7 | g02798770 |
Potentiometer - For Adjusting Auto-Shutoff Time Interval | |
- Adjust the potentiometer in a clockwise direction to increase the length of time the unit will stay "ON". The initial setting is 1 minute after the "Press to Test" button has been pressed.
- Replace the back cover.
Service
If the belt tension tester does not operate correctly or needs repairing, contact Dealer Service Tools. See Section ""Additional Contact Information" ".
Before sending the tool back for repair, be sure to enclose a letter that describes the problem and include a purchase order number for repair billing. Also, list the date of purchase from Caterpillar. Diagnostic tools have a 1 year warranty and will be repaired at no charge (except for abuse). The cost of out of warranty repairs will be charged to the dealer.