11:10. Check of pressure of transmission liquid (F4A42)

Check of pressure of transmission liquid is carried out to define a condition of hydraulic components and whether there are leaks.

 PERFORMANCE ORDER

  1. Launch the engine before warming up of the transmission up to the temperature of 80-100 °C.
  2. Lift the forward party of the car so that driving wheels could rotate freely.
  1. Connect the special manometer with an adapter to each union of check of pressure.
  1. Measure pressure of transmission liquid at various provisions of the lever of the selector and frequency of rotation of a bent shaft of the engine given in the table.
  1. If pressure does not correspond to the required values, check and repair transmission elements.

Automatic F4A42 transmission

State
Standard pressure of transmission liquid, kPa
Provisions of the selector
Position of the lever of the selector
Frequency of rotation of a bent shaft, mines-1
Reduction of pressure (UD)
Back coupling (REV)
Pressure of coupling of an overdrive gear (OD)
Р
–
2500
–
–
–
R
Z.Kh.
2500
–
1,270–1,770
–
N
Neutral.
–
–
–
–
D
The 1st lane.
2500
1,010–1,050
–
–
2 lanes.
2500
1,010–1,050
–
–
3 lanes.
2500
780–800
–
780–880
4 lanes.
2500
–
–
780–880

Automatic F4A42 transmission (continuation)

Standard pressure of transmission liquid, kPa
Brakes of low transfers and Z.H. (LR) Brakes 2 transfers (2ND) Pressure of the regulator of coupling (DA) Pressure of the regulator of a damper of coupling (DR)
260–340
–
–
220–360
1,270–1,770
–
–
500–700
260–340
–
–
220–360
1,010–1,050
–
–
500–700
–
1,010–1,050
–
500–700
–
–
More than 750
450–650
–
780–880
More than 750
450–650

Analysis of results of check of pressure of transmission liquid (F4A42)

Malfunction sign
Possible reason
All high hydraulic pressures The cable of control of the transmission is incorrectly adjusted
The adjusting valve is faulty
All hydraulic pressure low The cable of control of the transmission is incorrectly adjusted
The oil pump is faulty
The internal oil filter is polluted
The oil heater is blocked
The adjusting valve is faulty
The safety valve is faulty
The valve case is incorrectly installed
Hydraulic pressure is abnormal only in position of the R selector The adjusting valve is faulty
The opening is blocked
The valve case is incorrectly installed
Hydraulic pressure is abnormal only in position of the 3 or 4 selector The adjusting valve is faulty
The opening is blocked
The valve case is incorrectly installed
The valve of the solenoid of an overdrive gear is faulty
The valve of regulation of pressure of an overdrive gear is faulty
The switchboard valve is faulty
Hydraulic pressure is abnormal only on the lowering transfer Oil consolidation of K is damaged
Oil consolidation of L is damaged
Oil consolidation of M is damaged
Possible reason
The valve of the solenoid of the lowering transfer is faulty
The valve of regulation of pressure of the lowering transfer is faulty
The control ball is damaged
The opening is blocked
The valve case is incorrectly installed
Hydraulic pressure is abnormal only on coupling of transfer of a backing Oil consolidation of A is damaged
Oil consolidation of B is damaged
Oil consolidation of C is damaged
The opening is blocked
The valve case is incorrectly installed
Hydraulic pressure is abnormal only on an overdrive gear Oil consolidation of D is damaged
Oil consolidation of E is damaged
Oil consolidation of F is damaged
The valve of the solenoid of an overdrive gear is faulty
The valve of regulation of pressure of an overdrive gear is faulty
The control ball is damaged
The opening is blocked
The valve case is incorrectly installed
Hydraulic pressure is abnormal only on low transfers and transfer of a backing
Oil consolidation of I is damaged
Oil consolidation of J is damaged
The valve of the solenoid of low transfers and transfer of a backing is faulty
The valve of regulation of pressure of low transfers and transfer of a backing is faulty
The switchboard valve is faulty
The safety valve A is faulty
The control ball is damaged
The opening is blocked
The valve case is incorrectly installed
Abnormally only secondary hydraulic pressure
Oil consolidation of G is damaged
Oil consolidation of H is damaged
Oil consolidation of O is damaged
The secondary solenoidal valve is faulty
The secondary valve of adjustment of pressure is faulty
The safety valve B is faulty
The opening is blocked
The valve case is incorrectly installed
Abnormally only the hydraulic pressure of coupling of transfer of a backing
The oil heater is damaged
Oil consolidation of N is damaged
The valve of the solenoid of management of coupling of the shock-absorber is faulty
The valve of management of coupling of the shock-absorber is faulty
The valve of adjustment of pressure of the hydrotransformer is faulty
The opening is blocked

Pressure is put not to the functioning element 		The valve case is incorrectly installed
The cable of control of the transmission is incorrectly adjusted
The valve is damaged
The control ball is damaged