Bench Test Procedure for a 793D Off-Highway Truck Transmission {3030, 3073} Caterpillar


Bench Test Procedure for a 793D Off-Highway Truck Transmission {3030, 3073}

Usage:

793D FDB
Off Highway Truck
793D (S/N: FDB1-UP)

Introduction

Table 1
Revision  Summary of Changes in REHS3434 
08  Standardized. 
07  Removed model 789D. 
06  Updated Tables 17 and 18. 
05  Updated introduction and Start Checks. 
04  Updated Introduction and Pressure Checks. 

© 2015 Caterpillar All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law. Information contained in this document is considered Caterpillar: Confidential Yellow.

This special instruction contains the necessary information that is required to bench test a specific transmission arrangement. Refer to Table 2 for the correct arrangements. Bench testing the transmission ensures correct assembly and operation of the component. Rotating a transmission provides the most conclusive evaluation. Testing allows the dealer to ensure that the transmission will operate properly in the machine. The specifications in this guideline are specific to bench testing the component. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This guideline must be used with the latest technical information that is available from Caterpillar.

For questions or additional information concerning this guideline, submit a form for feedback in the Service Information System. To address an urgent issue, use the following resources to communicate your request to Caterpillar Repair Process Engineering:

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Table 2
Machine Model  Transmission Arrangement 
793D  240-7184 

Canceled Part Numbers and Replaced Part Numbers

This document may include canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Important Safety Information



Illustration 1g02139237

Follow all safety warnings. Most accidents that involve product operation, maintenance, or repair are caused by failure to observe safety warnings. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. Personnel must be properly trained to perform maintenance, repair, or operate any machine. Safety precautions and warnings are provided this instruction and on Caterpillar products. These warnings should be observed before performing any procedures. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are not all inclusive.

The hazards are identified by the “Safety Alert Symbol” which is followed by a “Signal Word” such as “DANGER”, “WARNING, or” “CAUTION”. The “WARNING” Safety Alert Symbol is shown in illustration below.



Illustration 2g00008666

This safety alert symbol means:

Pay Attention!

Become Alert!

Your Safety is Involved.

The message that appears under the safety alert symbol explains the hazard.

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 safety information in this document and the safety information on the machine are not all inclusive. Determine that the tools, procedures, work methods, and operating techniques are safe. Determine that the operation, lubrication, maintenance, and repair procedures will not damage the machine. Also, determine that the operation, lubrication, maintenance, and repair procedures will not make the machine unsafe.

The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. 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, most current information before you start any job. Caterpillar dealers can supply the most current information.

Collecting The Test Data

Since conditions vary for each test bench, use the data that is collected from your test bench. The collected data is used to compare test results. The data should be collected and maintained by the operator.

Data from each transmission arrangement is collected and stored. Averages from each transmission arrangement are often used to compare values on portions of transmission tests. Always compare data that is collected from the same transmission arrangement that is being tested. Averages for the last 20 transmission arrangements should be maintained.

------ WARNING! ------

Personal injury or death can result from escaping fluid under pressure.

Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

Always use a board or cardboard when checking for a leak.


------ WARNING! ------

Hot oil and components can cause personal injury.

Do not allow hot oil or components to contact skin.


------ WARNING! ------

Personal injury or death can result from not following the proper procedures.

To avoid the possibility of injury or death, follow the established procedure.


Tools Needed

Note: Pressures will be sensitive to tooling setup. The diameter of the hose, the diameter of a fitting, and additional filtering can affect pressure. The required tools that are listed in Table 3 were used to develop this test procedure.

Table 3
Required Tools 
Tool  Part Number  Part Description  Qty 
1U-9584  Rail As 
1U-5935 Plate As 
0L-1178 Bolt (3/4-10X2.0 inch) 
5P-8248 Hard Washer 
2J-3506 Nut 
1B-4367 Bolt (5/8-11X3.5 inch) 
4B-5275 Washer 
1D-4720 Nut 
5D-6428 O-Ring Seal 
1U-8654  Adapter (Splined) 
1U-5999 Spindle Gp 
8B-7997 Bolt (1/2-13X2.0) 
1U-8654  Adapter (Splined) 
1U-9586  Swivel Head Support Gp 
1U-9722  Load Binder As 
1U-8847  Adapter Plate 
2H-3740 Bolt (3/4-16X1.25 inch) 
1U-9131  Drive Adapter (Key)(1) 
1U-9359  Drive Adapter(2) 
3B-6552  Elbow 
3B-7282 Nipple (Pipe) 
6V-4142 Fitting (Test) 
4C-4898  Test Cover 
6V-3965  Fitting 
3J-1907 O-Ring Seal 
9U-7446  Adapter 
1U-8301 Fitting 
6V-3965 Fitting 
8C-9024 Fitting As 
1P-4579 Split Flange 
9S-1366 Bolt (1/2-13X1.25 inch) 
3J-1907 O-Ring Seal 
1U-8301  Fitting 
9U-7445 Adapter 
1P-4578 Split Flange 
8C-9024 Fitting As 
6V-3965 Fitting 
3J-1907 O-Ring Seal 
0T-0319 Bolt (7/16-14X2.0 inch) 
9U-7500  Transmission Analyzer Tool Gp 
OR
277-2362 Transmission Analyzer Gp 
306-0397 Extension Cable 
1U-9482 Adapter Cable 
4C-5974 Cable Adapter 
Q(3)  4C-9910  Portable Hydraulic Tester 
R(3)  8T-0855  Pressure Gauge ( 0 - 4000 kPa (0 - 580 psi)
6V-4144 Quick Connect Coupler 
S(3)  8T-0854  Pressure Gauge ( 0 - 965 kPa (0 - 140 psi)
6V-4144 Quick Connect Coupler 
(1) This drive adapter is used with the small drive shaft.
(2) This drive adapter is used with the large drive shaft.
(3) Option Tooling if needed


Illustration 3g01312859
Tooling (A)

Installation Procedure



    Illustration 4g01312872

  1. Install Tooling (A).


    Illustration 5g01315559

    Note: Refer to Special Instruction, SEHS8763, "Assembly and Operation of 1U-5999 Spindle Group Used for Testing Transmissions on Hydraulic Test Bench" for additional information.

  2. Remove collet (1) and the drawbar bolt from Tooling (B).


    Illustration 6g01315564

  3. Lubricate the outer diameter of Tooling (C).

  4. Install Tooling (C) in Tooling (B).

  5. Install the drawbar bolt. Tighten the drawbar bolt to retain Tooling (C) in Tooling (B). The correct torque is 169 N·m (125 lb ft).

  6. Install Tooling (B) on Tooling (A).


    Illustration 7g01312919

  7. Install Tooling (D) on the input end of transmission.


    Illustration 8g01312909

  8. Install Tooling (D) on the output end of the transmission.

  9. Use a hoist to install the transmission on the test bench. The weight of the transmission is 1907 kg (4206 lb).


    Illustration 9g01312940

  10. Remove transmission magnetic screen (2).


    Illustration 10g01312934


    Illustration 11g01312936

  11. Install Tooling (E) to prevent movement during testing.


    Illustration 12g01312990

  12. Install Tooling (F).


    Illustration 13g01312991

  13. Install Tooling (G) on Tooling (F).

    Note: Tooling (G) will adapt to the small drive shaft. When the large drive shaft is being used, install Tooling (H) on Tooling (G).



    Illustration 14g01313005

  14. Align the transmission with the input drive shaft.

  15. Connect the input drive shaft to Tooling (G).


    Illustration 15g01313009

  16. Install the drive shaft guard.


    Illustration 16g03802221

  17. Tighten all four castle nuts and jack bolts.


    Illustration 17g01313025

  18. Remove harness (3).


    Illustration 18g01313027

  19. Remove step (4).


    Illustration 19g01313028

  20. Remove cover (5).


    Illustration 20g01313101

  21. Remove plug (6).


    Illustration 21g01313102

  22. Install Tooling (J).


    Illustration 22g01313103

  23. Install Tooling (K).


    Illustration 23g01313104

  24. Install Tooling (L).


    Illustration 24g01313123

  25. Install Tooling (M).


    Illustration 25g01313124

  26. Install Tooling (N).


    Illustration 26g01313140
    Main Pump Supply

  27. Connect hose (7) from the pressurized flow meter to Tooling (M).


    Illustration 27g01313141
    Oil Cooler Flow

  28. Connect hose (8) from Tooling (M) to the No. 2 flow meter inlet.


    Illustration 28g01313142
    Lubrication Inlet

  29. Connect hose (9) from the No. 2 flow meter outlet to Tooling (N).


    Illustration 29g01313143
    Spindle Lubrication

  30. Connect hose (10) from the test bench to Tooling (B). Adjust Tooling (B) to maintain a lubrication pressure of 275 kPa (40 psi).


    Illustration 30g01313837
    Transmission Lubrication Pressure

  31. Connect pressure gauge (11).


    Illustration 31g01313839
    Lockup Clutch Pressure

  32. Connect pressure gauge (12) to Tooling (L).


    Illustration 32g01313890
    (13) No. 4 Clutch Pressure
    (14) No. 5 Clutch Pressure
    (15) No. 6 Clutch Pressure
    (16) No. 2 Clutch Pressure
    (17) No. 1 Clutch Pressure
    (18) No. 3 Clutch Pressure

  33. Connect pressure gauges (13), (14), (15), (16), (17), and (18) to the proper locations.


    Illustration 33g01313927
    (19) Priority Valve Pressure

  34. Connect pressure gauge (19).


    Illustration 34g01313930
    (20) Supply Pressure

  35. Connect pressure gauge (20).


    Illustration 35g01313964

  36. Connect Tooling (P) to the transmission.


    Illustration 36g01313965

  37. Connect Tooling (P) to a suitable location.


    Illustration 37g01313979
    Tooling (P)


    Illustration 38g01457869
    Tooling (P)

  38. Connect Tooling (P) to a power source. Refer to Tool Operating Manual, NEHS0644 or Tool Operating Manual, NEHS0996 for the correct operating instructions.

    Note: Make sure that the transmission is secured to the test bench. Tighten all bolts to the proper torque.

Test Procedure

TA3 Navigation

  1. Select “Off-Highway Trucks”.

  2. Select “793D-24V”.

Harness Test (TA3 only)

  1. Make sure that the harness is properly connected.

  2. Use Tooling (P) to perform the harness test.

  3. Record the values in Table 6.

    Note: Do not continue testing until Harness Test passes.

Solenoid Test (TA2 only)

  1. Make sure that the harness is properly connected.

  2. Use Tooling (P) to perform the solenoid test.

  3. Record the values in Table 6.

    Note: Do not continue testing until Solenoid Test passes.

Start Checks

    Note: Refer to Testing and Adjusting, UENR1063, "789D and 789D XQ Off-Highway Truck Power Train" for the correct adjusting procedures.

  1. If you are using SAE 10W oil, warm the oil to 50 °C (125 °F). If you are using Mobil DTE11 oil, warm the oil to 34 °C (95 °F). Maintain this temperature for the duration of the test.

  2. Adjust the input flow to 57 ± 4L/min (15 ± 1 US gpm).


    Illustration 39g02720621

  3. With the transmission in the NEUTRAL position, rotate the input shaft in a counterclockwise direction. Adjust the input rotation to 700 ± 30 rpm.

    Note: The input shaft will be rotated in a counterclockwise direction for the duration of this test. The direction is determined as you face the drive motor of the test bench.

  4. Shift the transmission through all gears to eliminate air from the transmission controls.

  5. Verify the correct clutch engagement. Refer to Table 4.

  6. Stop the input rotation.

    Table 4
    Clutch Engagement Check 
    Gear  Cl 1  Cl 2  Cl 3  Cl 4  Cl 5  Cl 6 
    X          X 
    N1      X       
    N2  X           
    F1  X        X   
    F2    X      X   
    F3  X      X     
    F4    X    X     
    F5  X    X       
    F6    X  X       

Initial Pressure Check



    Illustration 40g01314751

  1. Remove the load piston plugs (21) in each clutch station.

  2. Adjust the input flow to 57 ± 4 L/min (15 ± 1 US gpm).

  3. Adjust the input rotation to 700 ± 30 rpm.

  4. The lockup clutch solenoid must be de-energized.

  5. Set pump pressure to 2517 ± 41 kPa (365 ± 6 psi).

  6. Shift the transmission through each gear range.

  7. Stop the input rotation.

  8. Stop the input flow.

  9. Record the clutch pressure for each gear range in Table 8.

  10. Verify all test points with the values in Table 7.


    Illustration 41g01314771

  11. Replace all of the load piston plugs except plug (22).

Priority Reducing Valve Check

  1. Adjust the input flow to 57 ± 4 L/min (15 ± 1 US gpm).

  2. Adjust the input rotation to 700 ± 30 rpm.

  3. Shift the transmission to the NEUTRAL 2 position.

  4. Shift the transmission to the FORWARD 1 position.

  5. The priority reducing valve pressure must be 2585 ± 68 kPa (375 ± 10 psi).

  6. Shift the transmission to the NEUTRAL 2 position.

  7. Stop the input rotation.

  8. Stop the input flow.

  9. Record the value in Table 9.

Neutralizer Valve Check

    Note: Eliminate all incoming flow before performing this test. It may be necessary to shut down the test bench.

  1. Stop the input rotation in any gear range except the NEUTRAL 1 position or the NEUTRAL 2 position.

  2. Adjust the input flow to 57 ± 4 L/min (15 ± 1 US gpm).

  3. Adjust the input rotation to 700 ± 30 rpm.

  4. The neutralizer valve must prevent a pressure increase at any clutch station.

  5. Shift the transmission to the NEUTRAL 1 position.

  6. The pressure at clutch "3" must rise to normal operating pressure.

  7. Stop the input rotation.

  8. Stop the input flow.

  9. Record the values in Table 10 and Table 11.

Lubrication Pressure Checks

  1. Adjust the input flow to 57 ± 4 L/min (15 ± 1 US gpm).

  2. Adjust the input rotation to 700 ± 30 rpm.

  3. Shift the transmission to the FORWARD 1 position.

  4. Record the lubrication pressure and lube flow in Table 12.

  5. Shift the transmission to the NEUTRAL 2 position.

  6. Adjust the input rotation to 600 rpm.

  7. Shift the transmission to the REVERSE position.

  8. Adjust the input speed to 700 ± 30 rpm.

  9. Record the lubrication pressure and lube flow in Table 13.

  10. The lubrication pressure must be within 7 kPa (1 psi) of the average for this arrangement.

  11. The lube flow must be at least 42 L/min (11 US gpm).

  12. Adjust the input flow to 148 ± 4 L/min (39 ± 1 US gpm).

  13. Adjust the input rotation to 1850 ± 30 rpm.

  14. Record lubrication pressure and lube flow in Table 13.

  15. The lubrication pressure must be within 7 kPa (1 psi) of the average for this arrangement. Reference is 48 ± 10 kPa (7 ± 2 psi).

  16. The lube flow must be at least 132 L/min (35 US gpm).

  17. Adjust the input speed to 600 rpm.

  18. Shift the transmission to the NEUTRAL 2 position.

  19. Shift the transmission to the FORWARD 1 position.

  20. Adjust the input rotation to 1850 ± 30 rpm.

  21. Record the lubrication pressure and lube flow in Table 13.

  22. The lubrication pressure must be within 7 kPa (1 psi) of the average for this arrangement. Reference is 48 ± 10 kPa (7 ± 2 psi).

  23. The lube flow must be at least 132 L/min (35 US gpm).

    Note: The lubrication outlet flow is the difference between the cooler supply flow and lubrication supply oil.

  24. Shift the transmission through positions FORWARD 2, FORWARD 3, FORWARD 4, FORWARD 5, and FORWARD 6. Repeat Step 21 for each gear range.

  25. Adjust the input rotation to 700 ± 30 rpm.

  26. Shift the transmission to the NEUTRAL 2 position.

  27. Stop the input rotation.

  28. Stop the input flow.

Lube Circuit Check

  1. Shift the transmission to the FORWARD 2 position.

  2. Adjust the input flow to 189 ± 4 L/min (50 ± 1 US gpm).

  3. Adjust the input rotation to 1850 ± 30 rpm.

  4. Record the lubrication pressure in Table 14.

  5. The lubrication pressure must be within 7 kPa (1 psi) of the average for this arrangement. Reference is 62 ± 10 kPa (9 ± 2 psi).

    Note: The lubrication outlet flow is the difference between the cooler supply flow and lubrication supply oil.

  6. Stop the input rotation.

  7. Stop the input flow.

Low Idle Clutch Pressure Checks

  1. Adjust the input flow to 57 ± 4 L/min (15 ± 1 US gpm).

  2. Adjust the input rotation to 700 ± 30 rpm.

  3. The lockup clutch solenoid must be de-energized.

  4. Set low idle pressure to 2517 ± 172 kPa (365 ± 25 psi).

  5. Shift the transmission through ranges REVERSE, NEUTRAL 2, and FORWARD 1.

    Note: Always shift the transmission back to NEUTRAL when shifting between FORWARD and REVERSE.

  6. Record the clutch pressure for each gear range in Table 16.

  7. Verify all test points with the values in Table 15.

High Idle Clutch Pressure Checks

  1. Adjust the input flow to 148 ± 4 L/min (39 ± 1 US gpm).

  2. Adjust the input rotation to 700 ± 30 rpm with the transmission in the NEUTRAL 1 position.

  3. The lockup clutch solenoid must be de-energized.

  4. Adjust the input rotation to 1850 ± 30 rpm.

  5. Set pump pressure to 2979 ± 193 kPa (432 ± 28 psi).

  6. Record the clutch pressure in Table 18.

  7. Adjust the input rotation to 700 ± 30 rpm.

  8. Shift the transmission through positions NEUTRAL 2, REVERSE, and FORWARD 1. Repeat Steps 4 through 7 for each gear range.

    Note: Always shift the transmission back to NEUTRAL when shifting between FORWARD and REVERSE.

  9. Adjust the input rotation to 700 ± 30 rpm with the transmission in the FORWARD 1 position.

  10. Energize the lockup clutch solenoid.

  11. Adjust the input rotation to 1850 ± 30 rpm.

  12. Record the clutch pressure in Table 18.

  13. Record pump pressure in Table 18.

  14. Adjust the input rotation to 700 ± 30 rpm.

  15. Shift the transmission through positions FORWARD 2, FORWARD 3, FORWARD 4, FORWARD 5, and FORWARD 6. Repeat Steps 11 through 14 for each gear range.

  16. Verify all test points with the values in Table 17.

Contamination Control

  1. Take an oil sample of the test bench oil supply. Oil contamination must be maximum ISO 16/13.

  2. Record the results in Table 19.

  3. Remove the transmission from the test bench if the test bench oil supply is within specifications.

Transmission Bench Test Data Sheet

Table 5
CATERPILLAR  Transmission Bench Test Data Sheet  Test Date:_______ 
Model:_______
Work Order:_______  Serial No.:_______ 

Solenoid Test

Table 6
Solenoid Test  Solenoid 1  Solenoid 2  Solenoid 3 

_______ ohms

_______ ohms 

_______ ohms 

Initial Pressure Check

Table 7
Initial Clutch Pressures 
Input Flow 57 ± 4 L/min (15 ± 1 US gpm)
Input Pressure 2517 ± 41 kPa (365 ± 6 psi) 
Input Speed (700 ± 30 rpm) 
Gear  Active Clutches  Cl 1(1)  Cl 2(1)  Cl 3(1)  Cl 4(1)  Cl 5(1)  Cl 6(1) 
R  1  6  475 kPa (69 psi)          427 kPa (62 psi) 
N1    3      482 kPa (70 psi)       
N2  1    475 kPa (69 psi)           
F1  1  5  475 kPa (69 psi)        448 kPa (65 psi)   
F2  2  5    524 kPa (76 psi)      448 kPa (65 psi)   
F3  1  4  475 kPa (69 psi)      427 kPa (62 psi)     
F4  2  4    524 kPa (76 psi)    427 kPa (62 psi)     
F5  1  3  475 kPa (69 psi)    482 kPa (70 psi)       
F6  2  3    524 kPa (76 psi)  482 kPa (70 psi)       
(1) The tolerance is + 48 − 34kPa (+ 7 − 5psi).

Table 8
Initial Clutch Pressures 
Input Flow 57 ± 4 L/min (15 ± 1 US gpm)  Input Speed (700 ± 30 rpm) 
Gear  Active Clutches  Cl 1(1)  Cl 2(1)  Cl 3(1)  Cl 4(1)  Cl 5(1)  Cl 6(1) 
R  1  6 
________ 
       
________ 
N1    3     
________ 
     
N2  1   
________ 
         
F1  1  5 
________ 
     
________ 
 
F2  2  5   
________ 
   
________ 
 
F3  1  4 
________ 
   
________ 
   
F4  2  4   
________ 
 
________ 
   
F5  1  3 
________ 
 
________ 
     
F6  2  3   
________ 

________ 
     
(1) The tolerance is + 48− 34kPa (+ 7− 5 psi).

Priority Reducing Valve Check

Table 9
Priority Reducing Valve  Input Speed (700 ± 30 rpm)
Input Flow 57 ± 4 L/min (15 ± 1 US gpm) 
_______kPa
_______(psi) 

Neutralizer Valve Check

Table 10
Neutralizer Valve (Step 1)  Input Speed (700 ± 30 rpm)
Input Flow 57 ± 4 L/min (15 ± 1 US gpm) 
Cl 1  Cl 2  Cl 3  Cl 4  Cl 5  Cl 6 
_______kPa
_______(psi) 
_______kPa
_______(psi) 
_______kPa
_______(psi) 
_______kPa
_______(psi) 
_______kPa
_______(psi) 
_______kPa
_______(psi) 

Table 11
Neutralizer Valve (Step 2)  Gear Range N1 
Cl 3  _______kPa
_______(psi) 
The clutch pressure must rise to normal pressure.  Yes  No 

Lubrication Pressure Check

Table 12
Low Idle Lubrication Pressures  Input Speed (700 ± 30 rpm)
Input Flow 57 ± 4 L/min (15 ± 1 US gpm) 
Gear  Lubrication Pressure  Lubrication Flow 
R  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F1  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 

Table 13
High Idle Lubrication Pressures  Input Speed (1850 ± 30 rpm)
Input Flow 148 ± 4 L/min (39 ± 1 US gpm) 
Gear  Lubrication Pressure  Average Lubrication Pressure of Arrangement 
R  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
N1  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
N2  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F1  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F2  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F3  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F4  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F5  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 
F6  _______kPa
_______(psi) 
_______L/min

_______(US gpm) 

Lube Circuit Check

Table 14
Low Idle Lubrication Pressures  Input Speed (1850 ± 30 rpm)
Input Flow 189 ± 4 L/min (50 ± 1 US gpm) 
Gear  Lubrication Pressure  Lubrication Flow 
F2  _______kPa
_______(psi) 
_______kPa
_______(psi) 

Low Idle Clutch Pressure Checks

Table 15
Low Idle Clutch Pressures (Lockup Clutch De-energized) 
Input Flow 57 ± 4 L/min (15 ± 1 US gpm)
Input Pressure 2517 ± 172 kPa (365 ± 25 psi) 
Input Rotation (700 ± 30 rpm) 
Gear  Active Clutches  Cl 1(1)  Cl 2(1)  Cl 3(1)  Cl 4(1)  Cl 5(1)  Cl 6(1) 
R  1  6  2399 kPa (348 psi)          2585 kPa (375 psi) 
N2  1    2399 kPa (348 psi)           
F1  1  5  2399 kPa (348 psi)        2585 kPa (375 psi)   
(1) The tolerance is + 240 − 100 kPa (+ 35 − 15 psi).

Table 16
Low Idle Clutch Pressures 
Input Flow 57 ± 4 L/min (15 ± 1 US gpm)  2517 ± 172 kPa (365 ± 25 psi)  Input Rotation (700 ± 30 rpm) 
Gear  Active Clutches  Cl 1  Cl 2  Cl 3  Cl 4  Cl 5  Cl 6 
R  1  6 
________ 
       
________ 
N2  1   
________ 
         
F1  1  5 
________ 
     
________ 
 

High Idle Clutch Pressure Checks

Table 17
High Idle Clutch Pressures 
Input Flow 148 ± 4 L/min (39 ± 1 US gpm)  2979 ± 193 kPa (432 ± 28 psi)  Input Rotation (1850 ± 30 rpm) 
Gear  Active Clutches  Cl 1(1)  Cl 2(1)  Cl 3(1)  Cl 4(1)  Cl 5(1)  Cl 6(1) 
Lockup clutch solenoid de-energized 
R  1  6  2426 kPa (352 psi)          2806 kPa (407 psi) 
N1    3      2468 kPa (358 psi)       
N2  1    2426 kPa (352 psi)           
F1  1  5  2426 kPa (352 psi)        2723 kPa (395 psi)   
Lockup clutch solenoid energized 
Pump Pressure 2158 ± 152 kPa (313 ± 22 psi) 
F2  2  5    1723 kPa (250 psi)      1723 kPa (250 psi)   
F3  1  4  1723 kPa (250 psi)      1723 kPa (250 psi)     
F4  2  4    1723 kPa (250 psi)    1723 kPa (250 psi)     
F5  1  3  1723 kPa (250 psi)    1723 kPa (250 psi)       
F6  2  3    1723 kPa (250 psi)  1723 kPa (250 psi)       
(1) The tolerance is + 240 − 100 kPa (+ 35 − 15 psi).

Table 18
High Idle Clutch Pressures 
Input Flow 148 ± 4 L/min (39 ± 1 US gpm)  2979 ± 193 kPa (432 ± 28 psi)  Input Rotation (1850 ± 30 rpm) 
Gear  Active Clutches  Cl 1  Cl 2  Cl 3  Cl 4  Cl 5  Cl 6 
Lockup clutch solenoid de-energized 
R  1  6 
________ 
       
________ 
N1    3     
________ 
     
N2  1   
________ 
         
F1  1  5 
________ 
     
________ 
 
Lockup clutch solenoid energized 
F2  2  5   
________ 
   
________ 
 
F3  1  4 
________ 
   
________ 
   
F4  2  4   
________ 
 
________ 
   
F5  1  3 
________ 
 
________ 
     
F6  2  3   
________ 

________ 
     

Contamination Control

Table 19
ISO Particle Count  Sample the test bench oil supply.
*ISO 4406 is 16/13 or better 
________/________Particle Count 

Table 20






______________________________________
Technician
 






______________________________________
Supervisor
 

Caterpillar Information System:

777E, 777F and 777G Off-Highway Truck Turbocharger - Remove
120M, 12M, 140M, 14M, 160M and 16M Motor Graders Implement Electronic Control System Electrical Input Components
814F Series 2 Wheel Dozer, 815F Series 2 Soil Compactor and 816F Series 2 Landfill Compactor Braking System Brake and Planetary
120M, 12M, 140M and 160M Motor Graders Final Drive and Tandem Drive
740 and 740 EJECTOR Articulated Trucks Power Train Final Drive and Wheel
2006/11/06 Service Parts for the Suspension Cylinder Are Available Worldwide {7201}
740 and 740 EJECTOR Articulated Trucks Power Train Final Drive and Wheel
12M, 140M and 160M Motor Graders Braking and Hydraulic Fan System Service Brakes
2006/12/25 A New Pump Flow Test for Skid Steer Loaders and Multi Terrain Loaders {5073}
777G Off-Highway Truck Power Train Modulating Valve (Torque Converter Lockup Clutch) - Install
12M, 140M and 160M Motor Graders Braking and Hydraulic Fan System Location of Components
Installation of the AccuGrade® - Grade Control System (GPS/ATS) for the Motor Graders{7220} Installation of the AccuGrade® - Grade Control System (GPS/ATS) for the Motor Graders{7220}
2006/11/06 Improved Routing and Retention of Components on Skid Steer Loaders and Multi Terrain Loaders {1274, 1408, 5057, 7451}
120M, 12M, 140M, 14M, 160M and 16M Motor Graders Implement Electronic Control System Electrical Output Components
773F Off-Highway Truck and 775F Off-Highway Truck Engine Supplement Oil Cooler (Engine) - Remove
773F Off-Highway Truck and 775F Off-Highway Truck Engine Supplement Oil Cooler (Engine) - Install
246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Systems Electrohydraulic Control (Joystick) - Right
C175-16 Engine for 795F Series AC Off-Highway Trucks Turbocharger Support
246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Systems Tandem Drive and Axle
814F Series 2 Wheel Dozer, 815F Series 2 Soil Compactor and 816F Series 2 Landfill Compactor Power Train Position Sensor (Left Brake Pedal) (Decelerator) (Electronic Technician) - Calibrate
C175-16 and C175-20 Engines for Off-Highway Trucks Engine Oil Pump
814F Series 2 Wheel Dozer, 815F Series 2 Soil Compactor and 816F Series 2 Landfill Compactor Power Train Fill Time for the Transmission Clutch (Electronic Technician) - Calibrate
770 and 772 Off-Highway Truck Power Train Differential
C175-16 Engine for Off-Highway Trucks Engine Oil Scavenge Pump
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