Smoke Limiter, Tad1630P/V; Replacing The Diaphragm - Volvo Penta TAD1630G Workshop Manual

Group 22
9
Fit the union (3) and the O-ring (4) to the feed pump housing.
10
Fit the hand primer pump (5) and the seal (6).
11
Fit the push rod (15).
Note: If the pump is not going to be refitted immediately, fit
protective plugs to both connections.
Smoke limiter
The task of the smoke control device is to limit the quantity of
fuel from the injection pump at low boost pressure.
The diaphragm in the smoke control device is activated via a
pipe by the pressure in the inlet pipe. The diaphragm's move-
ment operates an angle lever via a link system.
The angle lever's lower section operates the injection pump's
control rod.
Low boost pressure
At low boost pressure the angle lever is operated by the con-
trol rod so that a low maximum quantity is maintained.
At high boost pressure the angle lever adopts a position
where the control rod can provide the high maximum quanti-
ty.
Note: The seals may only be broken by authorized staff.
High boost pressure
Service procedures - fuel system

Replacing the diaphragm

(Can be carried out with the pump fitted to the engine)
Note: The seals may only be broken by authorized staff.
1
Remove the pipe between the smoke control device and the
inlet pipe.
2
Remove the seals on the smoke control device and remove
the upper cover and outer end cover.
3
Rotate the diaphragm 90° and lift it out.
4
Unscrew the nut (1), remove the diaphragm and screw in a
new one.
5
Fit the diaphragm in the smoke control device.
Note: The groove (2) in the axle should be across the
pump's length direction before rotation. Check after fitting
that the diaphragm's axle (3) is correctly secured in the
yoke.
6
Fit the cover and pipe. Seal the screws.
107