- Wheel Loader
- 950L (S/N: TNS1-UP; LXX1-UP)
- 950M (S/N: KSA1-UP; EMB1-UP; ENE1-UP; XCJ1-UP; NHL1-UP; FTR1-UP; LCR1-UP; J1S1-UP)
- 950M Z (S/N: HE81-UP)
- 962L (S/N: MTN1-UP; SXS1-UP)
- 962M (S/N: K881-UP; EJB1-UP; JYD1-UP; LSE1-UP; RKH1-UP; RCL1-UP; J2S1-UP; F2T1-UP)
- 962M Z (S/N: SA81-UP)
- 950M (S/N: KSA1-UP; EMB1-UP; ENE1-UP; XCJ1-UP; NHL1-UP; FTR1-UP; LCR1-UP; J1S1-UP)
Introduction
Revision | Summary of Changes in REHS9354 |
06 | Added serial number prefixes KSA and RKH. |
05 | Added serial number prefixes NHL and K88. |
04 | Add Part Number to Tooling C in Table 3
Adjust Flow Tolerances in Low and High Idle Add Missing Sensor Value in Table 19 |
03 | Added serial number prefixes. |
02 | Change Lockup Pressures in Tables 13 and 17. Standardized. |
© 2019 Caterpillar All Rights Reserved. This document 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 document 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 document 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 document must be used with the latest technical information that is available from Caterpillar.
For technical questions when using this document, work with your Dealer Technical Communicator (TC).
To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.
Machine Model | Transmission Arrangement |
950M, 962M | |
950L, 962L |
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 1 | g02139237 |
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 2 | g00008666 |
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 document 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.
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. |
Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. |
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. These tools are suggested and may very depending on availability and bench configuration.
Required Tools | |||
---|---|---|---|
Tool | Part Number | Part Description | Qty |
A | Rail As | 2 | |
Plate | 2 | ||
Plate | 2 | ||
Bracket As | 2 | ||
Bolt (M16x2.00x140) | 4 | ||
Crossmember As | 1 | ||
Bolt (M16x2.00x90) | 6 | ||
Hard Washer | 16 | ||
Nut | 2 | ||
Lifting Eye Assembly | 2 | ||
B | Drive Adapter Gp | 1 | |
C | Adapter As | 1 | |
Adapter Ring | 1 | ||
Bolt (3/8-16x1.25 inch) | 6 | ||
Lockwasher | 6 | ||
D | Spindle Gp | 1 | |
Bolt (1/2-13x2.00 inch) | 4 | ||
Lockwasher | 4 | ||
E | Adapter As (Spindle Drive) | 1 | |
F(1) | Drive Adapter (Drive Key) | 1 | |
G(2) | Drive Adapter | 1 | |
H | Load Binder As (Ratchet Type) | 2 | |
Lifting Eye Assembly | 4 | ||
J | Cover | 1 | |
Bolt (M12x1.75x30) | 4 | ||
Washer | 4 | ||
K | Fitting | 8 | |
L | Half Flange | 2 | |
Bolt (M10x1.5x35mm) | 4 | ||
Fitting | 1 | ||
Adapter As | 1 | ||
Fitting | 1 | ||
Fitting As | 1 | ||
M | Ball Valve | 1 | |
Adapter | 1 | ||
Quick Coupler | 1 | ||
Fitting As | 1 | ||
N | Flange | 1 | |
Fitting As | 1 | ||
Bolt (M10x1.5x40mm) | 4 | ||
Pipe Nipple | 1 | ||
P | Fitting | 1 | |
Fitting | 1 | ||
Weld Stud | 1 | ||
Fitting As | 1 | ||
Adapter | 1 | ||
Elbow | 1 | ||
Q | Fitting | 1 | |
Fitting As | 1 | ||
Fitting | 1 | ||
Union | 1 | ||
Adapter | 1 | ||
R | Tee | 1 | |
Fitting As | 3 | ||
S | Load Sensing Valve | 1 | |
T | Adapter Harness As | 1 | |
Extension Cable | 1 | ||
U | Transmission Analyzer Gp | 1 | |
V(3) | Portable Hydraulic Tester | 3 | |
W(3) | Pressure Gauge ( |
10 | |
Quick Connect Coupler | 10 | ||
X(3) | Pressure Gauge ( |
2 | |
Quick Connect Coupler | 2 |
(1) | For use with the small drive shaft. |
(2) | For use with the large drive shaft. |
(3) | Optional Tooling if needed with Test Bench. |
Installation Procedure
- Install Tooling (A) to the test stand.
Show/hide table
Illustration 4 g03581447 - Use a hoist to install the transmission on to Tooling (A). The weight of the transmission is
1588 kg (3500 lb) .Show/hide tableIllustration 5 g03581454 - Install Tooling (B) to the input end of the transmission.
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Illustration 6 g03581457 - Use a hoist to install Tooling (C) to the input end of the transmission.
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Illustration 7 g03581481 - Use a hoist to install Tooling (D) to Tooling (C).
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Illustration 8 g03374665 - Adjust and tighten the collet on Tooling (D).
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.
Show/hide tableIllustration 9 g03581489 - Install Tooling (E) onto Tooling (D).
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Illustration 10 g03581492 - Install Tooling (F) onto Tooling (E).
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Illustration 11 g03581498 - Align the transmission with the input drive shaft.
- Connect the input drive shaft with Tooling (F).
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Illustration 12 g03581501 - Close and latch drive shaft guard.
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Illustration 13 g03375318 - Tighten all four jack bolts and castle nuts on test bench bed.
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Illustration 14 g03581517 - Route chain through Tooling (A) and install Tooling (H) to both ends of the test stand.
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Illustration 15 g03581528 - Remove plug (1) from transmission.
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Illustration 16 g03581535 - Install Tooling (J) to the transmission.
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Illustration 17 g03581542 - Remove cover and filter assembly (2) from the transmission.
Show/hide table
Illustration 18 g03581557 Bottom: Clutch 1
Top: Clutch 2 - Install Tooling (K) to the transmission.
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Illustration 19 g03581565 Top: Clutch 3
Bottom: Clutch 4 - Install Tooling (K) to the transmission.
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Illustration 20 g03581576 Top: Clutch 5
Bottom: Clutch 6 - Install Tooling (K) to the transmission.
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Illustration 21 g03581601 Top: eMRV
Bottom: Lockup Clutch - Install Tooling (K) to the transmission.
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Illustration 22 g03581618 TC (out) - Install Tooling (L) to the transmission.
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Illustration 23 g03581621 - Install Tooling (M) onto Tooling (L).
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Illustration 24 g03581640 Lube (in) - Install Tooling (N) to the transmission.
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Illustration 25 g03581733 Controls (in) - Install Tooling (P) to the transmission.
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Illustration 26 g03581802 TC (in) - Install Tooling (Q) to the transmission.
Show/hide table
Illustration 27 g03581806 - Connect Hose Assembly (3) from Pump Supply to Tooling (R).
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Illustration 28 g03581814 Controls (in) - Connect Hose Assembly (4) from Flowmeter 1 (out) to Tooling (P).
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Illustration 29 g03581816 - Connect Hose Assembly (5) from Tooling (R) to Flowmeter 1 (in).
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Illustration 30 g03581823 Show/hide tableIllustration 31 g03581827 - Connect Hose Assembly (6) from Tooling (R) to Tooling (S) (in).
Show/hide table
Illustration 32 g03581837 - Connect Hose Assembly (7) from Tooling (S) (out) to Flowmeter 3 (in).
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Illustration 33 g03581838 TC (in) - Connect Hose Assembly (8) from Flowmeter 3 (out) to Tooling (Q).
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Illustration 34 g03581845 TC (out) - Connect Hose Assembly (9) from Tooling (M) to Flowmeter 4 (in).
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Illustration 35 g03581852 Lube (in) - Connect Hose Assembly (10) from Flowmeter 4 (out) to Tooling (N).
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Illustration 36 g03581867 Spindle Lube - Connect Hose Assembly (11) to Tooling (D).
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Illustration 37 g03581872 0 - 3447 kPa (0 - 500 psi)
(12) Clutch 2
(13) Clutch 1 - Connect Pressure Gauges to Pressure taps (12) and (13).
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Illustration 38 g03581875 0 - 3447 kPa (0 - 500 psi)
(14) Clutch 3
(15) Clutch 4 - Connect Pressure Gauges to Pressure taps (14) and (15).
Show/hide table
Illustration 39 g03581898 0 - 3447 kPa (0 - 500 psi)
(16) Clutch 5
(17) Clutch 6 - Connect Pressure Gauges to Pressure taps (16) and (17).
Show/hide table
Illustration 40 g03581908 0 - 3447 kPa (0 - 500 psi)
(18) Lockup Clutch
(19) eMRV - Connect Pressure Gauges to Pressure taps (18) and (19).
Show/hide table
Illustration 41 g03581921 0 - 3447 kPa (0 - 500 psi)
(20) Controls (in) - Connect a Pressure Gauge to Pressure tap (20).
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Illustration 42 g03581927 0 - 1379 kPa (0 - 200 psi)
(21) TC (in) - Connect a Pressure Gauge to Pressure tap (21).
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Illustration 43 g03581933 0 - 413.7 kPa (0 - 60 psi)
(22) Lube (in) - Connect a Pressure Gauge to Pressure tap (22).
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Illustration 44 g03581936 0 - 483 kPa (0 - 70 psi)
(23) TC (out) - Connect a Pressure Gauge to Pressure tap (23).
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Illustration 45 g03581960 - Install Tooling (T) to the transmission.
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Illustration 46 g03581976 - Install Tooling (T) to Tooling (U).
Illustration 3 | g03581445 |
TA3 Navigation
- Select “Wheel Loaders”.
- Select “950M-24V”.
Harness Test
- Make sure that the harness is properly connected.
- Use Tooling (U) to perform the harness test.
- Record the values in Table 6.
Note: Do not continue testing until Harness Test passes.
Start Checks
- 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 to34 °C (95 °F) . Maintain this temperature during the test. - Set input flow to
56.8 ± 3.8 L (15 ± 1 US gal) .Show/hide tableIllustration 47 g02720621 - With the transmission in NEUTRAL position, rotate the input shaft in a counterclockwise direction. Adjust the input rotation to 900 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
37.9 ± 1.9 L (10 ± 0.5 US gal) for Controls and18.9 ± 1.9 L (5 ± 0.5 US gal) for TC (in) is achieved. - Shift the transmission through all gear ranges until air is eliminated to stabilize pressures and flows.
- The lube pressure should be minimum
30 kPa (4 psi) .Note: If there is no lube pressure after 30 seconds, stop the test and verify test stand and transmission connections.
- Verify the correct clutch engagement. Refer to Table 4.
Show/hide table
Table 4 Clutch Engagement Check Gear Cl 1 Cl 2 Cl 3 Cl 4 Cl 5 Cl 6 F1 X X F2 X X F3 X X F4 X X F5 X X R1 X X R2 X X R3 X X - With the transmission in NEUTRAL position, measure Lube flow, Lube pressure, Controls pressure, TC (in) pressure, TC (out) pressure, and eMRV pressure.
- Record the values in Table 8.
- Confirm the values with Table 7.
Note: If the values do meet acceptance criteria, stop the test and verify test stand, instrumentation hook-ups, calibration, and/or repair/adjust the transmission.
- With the transmission in NEUTRAL, adjust the input flow to
117.3 ± 3.8 L (31 ± 1 US gal) . - Adjust the input rotation to 2000 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
75.7 ± 1.9 L (20 ± 0.5 US gal) for Controls and41.6 ± 1.9 L (11 ± 0.5 US gal) for TC (in) is achieved. - Wait until flows and pressures stabilize.
- Repeat Steps 8 through 10.
Electronic Main Relief Valve (eMRV) Check
Note: This check is to prove the function of the valve.
- With the transmission in NEUTRAL, adjust the input flow to
117.3 ± 3.8 L (31 ± 1 US gal) . - Adjust the input rotation to 2000 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
75.7 ± 1.9 L (20 ± 0.5 US gal) for Controls and41.6 ± 1.9 L (11 ± 0.5 US gal) for TC (in) is achieved. - Select the tab marked eMRV High Current/Low Pressure on test screen.
Note: Do not exceed 10 seconds at this setting.
- Record controls pressure in Table 9. Confirm that controls pressure is
655 ± 138 kPa (95 ± 20 psi) to verify the valves response. - Select the tab marked eMRV Low Current/High Pressure on test screen.
- Record controls pressure in Table 9. Confirm that controls pressure is
2654 ± 172 kPa (385 ± 25 psi) to verify the valves response.
Torque Converter Block Check
- Set the input flow to
56.8 ± 3.8 L (15 ± 1 US gal) . - Adjust the input speed to 900 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
37.9 ± 1.9 L (10 ± 0.5 US gal) for Controls and18.9 ± 1.9 L (5 ± 0.5 US gal) for TC (in) is achieved. - Shift the transmission to FORWARD 1.
- Use Tooling (M) to block flow temporarily at the converter outlet.
- The converter inlet and outlet pressures must be between
855 kPa (124 psi) and1138 kPa (165 psi) .Note: To prevent running the transmission dry, the maximum block time is 10 seconds.
- Open the lube flow.
- Record the value in Table 10.
Low Idle Pressure Check
- Set the input flow to
56.8 ± 3.8 L (15 ± 1 US gal) . - Adjust the input rotation to 900 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
37.9 ± 1.9 L (10 ± 0.5 US gal) for Controls and18.9 ± 1.9 L (5 ± 0.5 US gal) for TC (in) is achieved. - Shift the transmission to FORWARD 1.
- Record Lube Flow, Lube, Controls, TC (in), TC (out), and eMRV pressures, and Horse Power Loss in Table 12.
- Confirm values with Table 11.
- Record all Clutch pressures in Table 14.
- Confirm values with Table 13.
- Shift transmission through FORWARD 2, FORWARD 3, FORWARD 4, FORWARD 5, REVERSE 1, REVERSE 2, and REVERSE 3.
Note: Always shift the transmission back to NEUTRAL when shifting between FORWARD to REVERSE.
- Repeat Steps 5 through 8.
High Idle Pressure Check
- Set the input flow to
117.3 ± 3.8 L (31 ± 1 US gal) . - Adjust the input rotation to 900 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
75.7 ± 1.9 L (20 ± 0.5 US gal) for Controls and41.6 ± 1.9 L (11 ± 0.5 US gal) for TC (in) is achieved. - Shift the transmission to FORWARD 1 and increase input rotation to 2000 ± 20.
- Record Lube Flow, Lube, Controls, TC (in), TC (out), and eMRV pressures, and Horse Power Loss in Table 16.
- Confirm values with Table 15.
- Record all Clutch pressures in Table 18.
- Confirm values with Table 17.
- Shift transmission through FORWARD 2, FORWARD 3, FORWARD 4, REVERSE 1, REVERSE 2, REVERSE 3, and REVERSE 4.
Note: Always shift the transmission back to NEUTRAL when shifting between FORWARD to REVERSE.
- Repeat Steps 2 though 8.
Speed Sensor Test
- Set the input flow to
56.8 ± 3.8 L (15 ± 1 US gal) . - Set the input rotation to 900 ± 20 rpm.
- Adjust Tooling (S) until a split flow of
37.9 ± 1.9 L (10 ± 0.5 US gal) for Controls and18.9 ± 1.9 L (5 ± 0.5 US gal) for TC (in) is achieved. - Shift the transmission to FORWARD 2.
- Record Output Speed 1, Output Speed 2, and TC Output Speed in Table 19.
Contamination Control
- Take an oil sample of the test bench oil supply. Oil contamination must be maximum ISO 16/13.
- Record the results in Table 20.
- Remove the transmission from the test bench if the test bench oil supply is within specifications.
Transmission Bench Test Data Sheet
CATERPILLAR | Transmission Bench Test Data Sheet | Test Date:_______ |
Model:_______ | ||
Work Order:_______ | Serial No.:_______ |
Solenoid Test
Solenoid Test | Solenoid 1 | Solenoid 2 | Solenoid 3 | Solenoid 4 | Solenoid 5 | Solenoid 6 | Solenoid 7 |
_______ ohms |
_______ ohms |
_______ ohms |
_______ ohms |
_______ ohms |
_______ ohms |
_______ ohms |
Start Checks
Reference Nominal Transmission Flows and Pressures in NEUTRAL | ||
Input Speed | Low Idle | High Idle |
Lube Flow | |
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Lube Pressure | |
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Controls Pressure | |
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TC (in) Pressure | |
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TC (out) Pressure | |
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eMRV Pressure | |
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Reference Nominal Transmission Flows and Pressures in NEUTRAL | ||
Input Speed | Low Idle | High Idle |
Lube Flow | ||
Lube Pressure | ||
Controls Pressure | ||
TC (in) Pressure | ||
TC (out) Pressure | ||
eMRV Pressure |
Electronic Main Relief Valve (eMRV) Check
Input Flow Input Speed (2000 ± 20 rpm |
Low Current/High Pressure | High Current/Low Pressure |
Controls Pressure | _______kPa _______(psi) |
_______kPa _______(psi) |
Torque Converter Block Check
Torque Converter Inlet Pressure | Input Speed (900 ± 20 rpm) | _______kPa _______(psi) |
Low Idle Pressure Checks
Input Speed (900 ± 20 rpm)
Approximate Pump Flow |
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Gear Range | F1 | F2 | F3 | F4 | F5 | R1 | R2 | R3 |
Lube Flow | |
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Control Pressure | |
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TC In Pressure | |
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TC Out Pressure | |
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eMRV Pressure | |
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Hp Loss | |
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Input Speed (900 ± 20 rpm)
Approximate Pump Flow |
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Gear Range | F1 | F2 | F3 | F4 | F5 | R1 | R2 | R3 |
Lube Flow | ||||||||
Lube Pressure | ||||||||
Control Pressure | ||||||||
TC In Pressure | ||||||||
TC Out Pressure | ||||||||
eMRV Pressure | ||||||||
Hp Loss |
Low Idle Pressure at 900 ± 20 rpm | |||||||
Gear | Cl 1 | Cl 2 | Cl 3 | Cl 4 | Cl 5 | Cl 6 | Lockup |
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Low Idle Pressure at 900 ± 20 rpm | |||||||
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High Idle Pressure Checks
Input Speed (2000 ± 20 rpm)
Approximate Input Flow |
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Gear Range | F1 | F2 | F3 | F4 | F5 | R1 | R2 | R3 |
Lube Flow | |
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Control Pressure | |
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TC Out Pressure | |
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eMRV Pressure | |
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Hp Loss | |
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Input Speed (2000 ± 20 rpm)
Approximate Input Flow |
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Gear Range | F1 | F2 | F3 | F4 | F5 | R1 | R2 | R3 |
Lube Flow | ||||||||
Lube Pressure | ||||||||
Control Pressure | ||||||||
TC In Pressure | ||||||||
TC Out Pressure | ||||||||
eMRV Pressure | ||||||||
Hp Loss |
High Idle Pressure at 2000 ± 20 rpm | |||||||
Gear | Cl 1 | Cl 2 | Cl 3 | Cl 4 | Cl 5 | Cl 6 | Lockup |
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High Idle Pressure at 2000 ± 20 rpm | |||||||
Gear | Cl 1 | Cl 2 | Cl 3 | Cl 4 | Cl 5 | Cl 6 | Lockup |
N | |||||||
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F4 | |||||||
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R2 | |||||||
R3 |
Speed Sensor Test
Speed Sensor Test | Output Speed (900 ± 20 rpm)
Gear Range FORWARD 2 |
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Speed Sensor 1 | 635 Hz | __________________ |
Speed Sensor 2 | 635 Hz | __________________ |
TC Out Speed | 857 Hz | __________________ |
Contamination Control
ISO Particle Count | Sample the test bench oil supply. *ISO 4406 is 16/13 or better |
________/________Particle Count |
______________________________________ Technician |
______________________________________ Supervisor |