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5.1.17. Accelerating pump

Check

Adjustment of productivity of the accelerating pump, "" to increase, "-" to reduce

PERFORMANCE ORDER
1. When checking operability of the accelerating pump it is necessary to give to the float-operated camera fuel from the additional tank.
2. Mount primary camera of the carburetor over a volumetric glass. Completely open ten times and close a throttle the ny gate, and you make opening of the gate within one second then return the gate to a starting position and in three seconds repeatedly open it. Check that the cam of the accelerated turns of idling did not limit movement of a butterfly valve.
3. Measure amount of fuel which the accelerating pump gave to a volumetric glass, and compare these data with technically ми characteristics.
4. If adjustment is required, weaken the screw of fastening and turn a cam in the required direction then tighten the screw and repeatedly check productivity of the accelerating pump (see rice. Adjustment of productivity of the accelerating pump).

Removal

PERFORMANCE ORDER
1. Remove a weight wire from the accumulator.
2. On early models remove the air filter. On later models disconnect the air duct from the air filter, then disconnect a vacuum pipe and a hose of ventilation of a case from an air chamber. Unscrew three screws and remove an air chamber together with an air duct.
3. Clear the external surface of the accelerating pump.
4. Unscrew four screws and uncover the accelerating pump, a diaphragm, a spring, a support of a spring and the valve.

Installation

Elements of the accelerating pump

1 – a cover with a control lever;
2 – diaphragm;
3 – spring;
4 – valve;
5 – an opening for air

PERFORMANCE ORDER
1. Clear the interfaced surfaces of a cover of the accelerating pump and the case of the carburetor.
2. Check a condition of the valve of the accelerating pump and, if necessary, replace it.
3. Install the valve, a support of a spring and a spring in the carburetor case. Big diameter the spring has to be to a napravla on to the carburetor.
4. Install a diaphragm and a cover of the accelerating pump in the carburetor case. Gradually and evenly screw up screws of fastening of a cover of the accelerating pump not to deform a diaphragm (see rice. Elements of the accelerating pump).
5. Further installation is made in the sequence, the return to removal.