Ford Sierra

3.1.3.9.2. Carburettors Weber

THE GENERAL DATA

Elements of two-chamber carburettor Weber 84 HF and 85 HF

And – a cover of the carburettor, In – the case of the starting arrangement, With – a cover of the starting arrangement with a bimetallic spring, D – a jet of idling of II chamber, Е – a vacuum regulator of the second Chambers, F – the step-by-step engine of adjustment of idling (only Weber 85 HF), G – the screw of adjustment of structure of a mix of idling (the maintenance WITH),

Н – a diaphragm of the accelerating pump, J – a diaphragm of the enriching device of full loading (total power), To – a diaphragm of the enriching device of average loadings, L – a float, M – эмульсионная a tube of I chamber, N – a jet of idling of I chamber, Р – the needle valve, Q – the mesh fuel filter, R – эмульсионная a tube of II chamber

Installation of the step-by-step engine of adjustment of idling of carburettor Weber

And – a pusher of the step-by-step engine, In – a restrictive bolt of the lever throttle заслонки mixes

Adjustment of idling of carburettor Weber 85 HF

By arrow the screw of adjustment of structure of a mix of idling is shown.

In the engine 1,6 дм³ type LSD two-chamber carburettor Weber 84 HF 9510 CA is applied.

From model 1985 in the engine 2,0 дм³ type NET carburettor Weber 85 HF 9510 CA (in cars with a mechanical transmission) or Weber 8 HF 9510 DA (in cars with an automatic transmission) is applied. The design of basic elements of these carburettors is identical to carburettors Weber 83 HF, applied earlier in engines 2,0 дм³.

Carburettors Weber 84 HF and 85 HF contain following new elements:

  – Throttle заслонка mixes of II chamber copes vacuum, образуемом in an inlet collector;
  – The automatic starting arrangement has electric heating (only 85 HF – the engine 2,0 дм³);
  – The number of turns of idling is regulated by means of the electric step-by-step engine actuating throttle заслонку I chambers. This engine receives operating signals from the module of management of ignition ESC II (only 85 HF – the engine 2,0 дм³).

Check and adjustment of carburettors Weber

The information concerning only of check and adjustment of idling, and also removal and installation of the step-by-step engine of management throttle заслонкой mixes of 1st chamber idling carburettors Weber 85 HF 9510 CA and DA, applied in engines 2,0 дм³ type NET is more low resulted.

Removal and installation of the step-by-step engine and the basic adjustment of idling – the engine 2,0 дм³ type NET

Removal and installation of the step-by-step engine of adjustment of idling do not represent special difficulties.

PERFORMANCE ORDER

1. After installation it is necessary to spend the basic adjustment as follows. 2. To warm up the engine to normal working temperature, to switch off all consumers of a current and two times to increase number of turns of the engine to size about 2500 rpm. 3. To insert a plate щупа in the thickness of 1 mm between the pusher ends () (fig. Installation of the step-by-step engine of adjustment of idling of carburettor Weber) the step-by-step engine of adjustment of idling and a restrictive bolt () the lever throttle заслонки mixes see. The number of turns of idling of the engine should make 875±25 rpm. 4. If the number of turns has inappropriate size it is necessary to weaken a counternut of a restrictive bolt () and, rotating this bolt, to achieve necessary size of number of turns of idling of the engine. 5. To take a plate щупа and to increase at least two times number of turns of the engine to size about 2500 rpm. 6. Again to establish a plate щупа on a corresponding place and to check up, whether correct number of turns of idling of the engine. 7. To take a plate щупа, to check up and in case of need to adjust the maintenance WITH in exhaust gases.

Adjustment of structure of a mix (the maintenance WITH) idling – the engine 2,0 дм³ type NET

PERFORMANCE ORDER

1. To warm up the engine to normal working temperature. 2. To connect a tachometre and the analyzer of exhaust gases. 3. To keep within nearby 30 seconds number of turns of the engine at level of 3000 rpm and to release an accelerator pedal. 4. After stabilisation of indications of both devices to read the maintenance WITH idling. 5. In case of need to adjust the maintenance WITH by means of the screw of adjustment of structure of a mix of idling (fig. Adjustment of idling of carburettor Weber 85 HF see). 6. To establish a seal on the screw of adjustment of structure of a mix of idling. The prevention The number of turns of idling is regulated by the electronic module of management of ignition ESC II which operates the step-by-step engine turning throttle заслонку mixes idling. This knot is not subject to adjustment.

Adjusting data of carburettors Weber

The carburettor	84 HF 9510 СА (1/2 chamber)	85 HF 9510 СА (1/2 chamber)	85 HF 9510 DА (1/2 chamber)
Diameter chambers (mm)	28/30	30/34	30/34
Diameter диффузора (mm)	21/23	25/27	25/27
The main fuel jet	97/110	112/135	110/135
The main air jet	185/190	165/150	160/150
Emulsionnaja tube	F59/F22	F22/F22	F22/F22
Fuel jet of idling	50/40	45/45	45/45
Float installation – from an upper edge (mm)	6,0 ± 0,5	8,0 ± 0,5	8,0 ± 0,5
Deviation starting air заслонки at work of a vacuum regulator (mm)	6,25 ± 0,25	9,0	8,0
Number of turns of the accelerated idling (rpm)	1700 ± 100	–	–
Number of turns of idling (rpm)	800 ± 25	800*	800*
The maintenance FROM (%)	1,0 ± 0,25	1,0 ± 0,25	1,0 ± 0,25

* The number of turns of idling of the engine is regulated by the electronic module of management of ignition ESC II.