11:11. Check of pressure of transmission liquid (A4AF3)
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PERFORMANCE ORDER |
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Automatic A4AF3 transmission
№
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State
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Standard pressure of transmission liquid, kPa
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Provisions of the selector
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Speed of km/h
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Frequency of rotation of a bent shaft
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Position of the lever of the selector
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1
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2
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Reduction of pressure
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Kickdown
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1 |
N
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0
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H.KH.
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Neutral.
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430±30
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–
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2 |
D
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0
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H.KH.
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2 lanes.
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430±30
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138–277
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3 |
D (SW–ON)
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110
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2500
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4 lanes.
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430±30
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840–900
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4 |
D (SW–OFF)
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75
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2500
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3 lanes.
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430±30
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840–900
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5 |
2
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50
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2500
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2 lanes.
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430±30
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840–900
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6 |
L
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0
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2500
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The 1st lane.
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430±30
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–
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7 |
R
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35
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2500
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Z.Kh.
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420–480
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–
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0
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1000
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Automatic A4AF3 transmission (continuation)
Standard pressure of transmission liquid, kPa
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3
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4
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5
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6
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7
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8
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Forward coupling
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Pressure of coupling of the main transfer
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Brakes of low transfers and Z.H.
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Coupling regulator pressure
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Coupling damper regulator pressure
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Back coupling
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–
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–
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–
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–
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–
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–
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–
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–
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–
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–
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–
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–
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–
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650–710
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–
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570–630
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–
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840–900
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–
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840–900
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–
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660–820
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–
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840–900
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–
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–
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–
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490–785
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–
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840–900
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–
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–
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500–630
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–
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530–630
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–
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100–300
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–
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–
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–
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500–700
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–
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450
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–
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–
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Preliminary actions if pressure of oil is abnormal (A4AF3)
Malfunction sign
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Probable cause
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Actions
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Pressure in the pipeline very low (or high).
"Pressure in the pipeline" belong to the standard pressure of transmission liquid 2, 3, 4, 5, 6, 7 and 8 specified in the table |
1. The oil filter is polluted 2. Wrong adjustment of pressure adjusting valve 3. The regulator distributor is polluted 4. There is a gap of the case of valves 5. The inappropriate pressure created by the oil pump |
1. Visually examine an oil filter and, if necessary, replace it. 2. Check pressure in the pipeline by criterion of 2 (Kickdown): 3. Check functioning of the adjusting valve and, if necessary, replace the case of valves 4. Tighten bolts of fastening of the case of valves and an adjusting bolt 5. Check an axial gap of a gear wheel of the oil pump and, if necessary, replace the oil pump |
Inappropriate reduction of pressure | 1. Inappropriate pressure in the pipeline 2. Filter contamination (L-shaped type) 3. Wrong adjustment of reduction of pressure 4. Wrong adjustment of reduction of pressure 5. Jamming of the reducing valve 6. There is a gap of the case of valves |
1. Check pressure by criterion 2: 2. Disassemble the case of valves, check a condition of the filter and, if necessary, replace it 3. Check pressure by criterion 1: 4. Check functioning of the adjusting valve and, if necessary, replace the case of valves 5. Tighten bolts of fastening of the case of valves and an adjusting bolt |
Inappropriate pressure of a brake of kickdown | 1. The D-ring, a sealing ring, the plug or сервопоршень is damaged by kickdown 2. There is a gap of the case of valves 3. Functional failure of the case of valves |
1. Remove сервопоршень kickdown and check a condition of a sealing ring and a D-ring. In the presence of scratches replace a D-ring or a sealing ring 2. Tighten bolts of fastening of the case of valves and an adjusting bolt 3. Replace the case of valves |
Inappropriate pressure of forward coupling | 1. The D-ring, the plug or сервопоршень is damaged by kickdown 2. There is a gap of the case of valves 3. The case of valves is damaged 4. Wear of the forward piston of coupling or clamp, damage of a D-ring 5. Laying of the oil pump or a sealing ring is damaged |
1. Remove сервопоршень kickdown and check a condition of a sealing ring. In the presence of scratches replace a sealing ring or a D-ring 2. Tighten bolts of fastening of the case of valves and an adjusting bolt 3. Replace the case of valves 4. Disassemble the transmission and check wear of the piston of forward coupling, an internal circle of a clamp or damage of a D-ring. With wear and damages replace the corresponding elements |
Inappropriate pressure of coupling of the main transfer | 1. The D-ring, a sealing ring or a sealing ring of the pipeline is damaged 2. There is a gap of the case of valves 3. The case of valves is damaged |
1. Investigate coupling of the main transfer and check a condition of a D-ring, a piston ring, a sealing ring of a clamp, etc. In the presence of scratches replace the corresponding elements 2. Tighten bolts of fastening of the case of valves and an adjusting bolt an adjusting bolt 3. Replace the case of valves |
Low pressure of a brake of low transfers and transfer of a backing | 1. Consolidation between the case of valves and the transmission is damaged 2. There is a gap of the case of valves 3. The case of valves is damaged 4. The sealing ring of a brake of low transfers and transfer of a backing or a sealing ring of a clamp is damaged |
1. Remove the case of valves, check a condition of consolidation and, if necessary, replace it 2. Tighten bolts of fastening of the case of valves and an adjusting bolt 3. Replace the case of valves 4. Disassemble the transmission, check a condition of a sealing ring and, if necessary, replace it |
Inappropriate pressure of the hydrotransformer | 1. Jamming of the distributor with the electromagnetic drive of management of coupling of the shock-absorber (DCCSV) or the valve of management of coupling of the shock-absorber 2. Contamination or leakage of the oil heater and/or lines 3. The sealing ring of an entrance shaft is damaged 4. The hydrotransformer is damaged |
1. Check action of system of the coupling of the shock-absorber and DCCSV 2. Repair or replace a radiator and/or lines 3. Disassemble the transmission, check a condition of a sealing ring and, if necessary, replace it 4. Replace the hydrotransformer |
Inappropriate pressure of coupling of transfer of a backing | 1. The D-ring, a sealing ring or a sealing ring of coupling of transfer of a backing is damaged 2. There is a gap of the case of valves 3. The case of valves Possibly, the same reason, as pressure cause of infringement is damaged by management of coupling of the shock-absorber |
1. Investigate coupling of the main transfer and check a condition of a D-ring of the piston, a sealing ring of a clamp, etc. In the presence of scratches replace the corresponding elements 2. Tighten bolts of fastening of the case of valves and an adjusting bolt 3. Replace the case of valves Possibly, the same method of elimination, as elimination of a cause of infringement of pressure by management of coupling of the shock-absorber |
Inappropriate pressure of coupling of the shock-absorber |