Ford Sierra

1982-1993 of release

Repair and operation of the car


Ford Siyerra
+ 1.2. Identification of the car
+ 2. Maintenance
- 3. General data
   - 3.1. Cars with petrol engines
      3.1.1. Masses and transfer numbers
      3.1.2. Operational liquids
      - 3.1.3. Changes in a car design from 1984 to 1986.
         3.1.3.1. Engine
         3.1.3.2. Head of the block of cylinders
         3.1.3.3. Block of cylinders of the engine
         3.1.3.4. Krivoshipno-shatunny mechanism
         3.1.3.5. Bent shaft
         3.1.3.6. System of gas distribution
         3.1.3.7. Engine mount
         3.1.3.8. Cooling system
         + 3.1.3.9. Carburetor
         3.1.3.10. System of injection of fuel
         3.1.3.11. System of ignition
         3.1.3.12. Coupling
         3.1.3.13. Mechanical four-speed transmission
         3.1.3.14. Mechanical five-speed transmission
         - 3.1.3.15. Automatic Ford A 4 LD transmission
            3.1.3.15.1. Technical characteristics
            3.1.3.15.2. Service and repair
            3.1.3.15.3. Changes in a design of the automatic transmission
         3.1.3.16. Power shaft and back bridge
         3.1.3.17. System of steering with the hydraulic booster
         3.1.3.18. Forward suspension bracket
         3.1.3.19. Back suspension bracket
         3.1.3.20. Brake system
         + 3.1.3.21. Electric equipment
         3.1.3.22. General data
      + 3.1.4. Changes in a car design from 1987 to 1989.
      + 3.1.5. Changes in a car design from 1990 to February, 1993.
   + 3.2. Cars with diesel engines
+ 4. Engines
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment


a773976c



3.1.3.15. Automatic Ford A 4 LD transmission

3.1.3.15.1. Technical characteristics
GENERAL INFORMATION

Elements of the automatic Ford A 4 LD transmission
1 – oil pallet,
2 – oil receiver,
3 – laying,
4 – drive of the reverse gear,
5 – hydrokinetic knot of management,
6 – cover and consolidations,
7 – drive of forward transfer,
8 – drive average transfers,
9 – vacuum regulator,
10 – acceleration valve,
11 – safety switch,
12 – the blocking ratchet and the mechanism of blocking on the parking,
13 – sealing ring,
14 – back case of the transmission,
14a – laying,
15 – blocking mechanism latch
on the parking,
16 – secondary shaft,
17 – regulator,
18 – sealing rings of Viton,
19 – a regulator nave with a blocking mechanism gear wheel on the parking,
20 – ring,
21 – average case of the transmission,
22 – laying of the oil pallet,
23 – back coupling,
24 – ring,
25 – tape of a brake,
26 – brake drum,
27 – reverse planetary gear,
28 – lock ring,
 28a – laying,
29 – solar gear wheels,
30 – case of forward planetary transfer,
31 – forward planetary transfer,
32 – needle bearing,
32a and 33 – rings,
34 – forward coupling,
35 – sealing rings,
36 – multidisk coupling of direct transfer,
37 – persistent laying,
37a – sealing rings,
38 – case of average planetary transfer,
39 – persistent laying,
40 – average planetary transfer,
41 – unidirectional coupling,
41a – the needle bearing,
42 – multidisk coupling,
43 – laying,
44 – persistent laying,
45 – oil pump,
45a – sealing rings,
45b – a sealing ring of a shaft of the oil pump,
46 – gear wheel of the oil pump,
47 – intermediate plate,
47a – laying of an intermediate plate,
48 – case of hydrokinetic transfer,
48a – laying,
49 – output shaft,
50 – hydrokinetic transfer

From model of 1985 the version of the cars equipped with the automatic Ford A 4 LD four-speed transmission is entered. This transmission is equipped with the coupling blocking hydrokinetic transfer. Its three first transfers correspond to transfers of the three-stage automatic Ford C transmission 3, and the 4th transfer is nadperedachy (the increasing speed has transfer number).

CABLE OF THE KICK-DOWN MECHANISM

Originally in automatic Ford A 4 LD transmissions the control of the kick-down mechanism was mechanical (see rice. Adjustment of a cable of the kick-down mechanism in the 1st version of execution).

Since May, 1986 (a code of date of production of "GJ") the kick-down mechanism is run by the electromagnetic valve which provides more exact reduction of transfers.

DISTINCTIONS BETWEEN AUTOMATIC TRANSMISSIONS C 3 AND A 4 LD

In the four-speed transmission A 4 LD after inclusion of the 3rd and 4th transfers there comes blocking of hydrokinetic transfer thanks to what heating of oil in the transmission, and also fuel consumption by the engine decreases. The fourth transfer has the increasing transfer number which is the reason that the speed of the engine is 25% less, than on the 3rd (direct) transfer at the same speed of the movement.

Pressing an accelerator pedal against the stop (kick-down) causes automatic switching of transfer to the 3rd. It allows to achieve big accelerations and the maximum speed of the movement.

Specifications

Brand and type
Ford A 4 LD
Hydrokinetic transfer
Trilock with the blocking coupling
Number of hydrokinetic transfer
2,8
Oil radiator
tubular

CONTROL PARAMETERS

Control pressure of oil (kPa)

Position of the lever of gear shifting
Pressure idling
Pressure * at 1600 rpm
"R"
450 – 550
1850 – 2200
"P" and "N"
350 – 430
–
"DE"; "D"; "2" and "1"
350 – 430
1100 – 1300

* Pressure at test of an overload of the engine

Engine speed at test of an overload – 2000–2900 rpm.

Speeds of the movement at which there is a gear shifting

Provision of a pedal
Gear shifting
accelerator
1 – 2
2 – 3
3 – 2
2 – 1
The pedal of an accelerator is pressed against the stop
5800 ± 200 rpm
5800 ± 200 rpm
75 km/h
–
The pedal of an accelerator is pressed on 3/4
–
–
50 km/h
–
The pedal of an accelerator is not pressed
–
–
90 km/h (the lever in situation "2")
between 60 (the lever in situation "1")
Speed provided in the table concern the engine.

Numbers of transfers

Transfer
Transfer number
Full number of transfer with the main transfer with number
3,62 *
3,38 **
1
2,474
8,96
8,36
2
1,474
5,34
4,98
3
1,000
3,62
3,38
4
0,749
2,71
2,53
Backing
2,111
7,64
7.14

* The Ford Sierra 1,8 cars (the carburetor engine) and 2,0i (the engine with fuel injection.

** In the Ford Sierra 2,0 cars (the carburetor engine).

Lubricant

Amount of oil
8,5 dm3
Type
oil for automatic SQM 2C 9010 A transmissions (oil for CJ transfers)

Tightening moments

Case of hydrokinetic transfer to the engine
30 – 37 Nanometers
Case of hydrokinetic transfer to a forward case of the automatic transmission
36 – 53 Nanometers
Hydraulic knot of management
9 – 13 Nanometers
Lock-nut of a bolt of adjustment of a tension of a tape of a brake
47 – 61 Nanometers
Bolt of the intermediate holder
27 – 40 Nanometers