gf1430p2000v

Electric air pump. description of components

Type gf · topic 14.30 · version 0109 · 2008-03-17

Applies to: ENGINE 272.920 in MODEL 203 up to Model Year 8 ENGINE 272.922 in MODEL 211 ENGINE 272.940 in MODEL 203 up to Model Year 8 ENGINE 272.941 in MODEL 203 up to Model Year 8 ENGINE 272.942 in MODEL 171 up to Model Year 8 ENGINE 272.943 in MODEL 211, 219 ENGINE 272.944 in MODEL 211 ENGINE 272.945 in MODEL 251 up to Model Year 8 ENGINE 272.946 in MODEL 221 up to Model Year 8 ENGINE 272.960 in MODEL 203 up to Model Year 8 ENGINE 272.963 in MODEL 171 up to Model Year 8 ENGINE 272.964 i

Where it sits

Function group 1 Engine › 14 Exhaust manifold, engine brake, emission control system › 14.30 Secondary air injection — Series 164 · Series 171 · Series 203 · Series 209 · Series 211 · Series 216 · Series 219 · Series 221 · Series 230 · Series 251

Also applies to engines/gearboxes: 272 920, 272 922, 272 940, 272 941, 272 942, 272 943, 272 944, 272 945, 272 946, 272 960, 272 963, 272 964, 272 965, 272 966, 272 967, 272 970, 272 972, 272 975, 273 922, 273 923, 273 924, 273 960, 273 961, 273 962, 273 963, 273 965, 273 967, 273 968

GF14.30-P-2000V

Electric air pump. description of components

20.10.04

ENGINE 272.920 in MODEL 203 up to Model Year 8

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203 up to Model Year 8

ENGINE 272.941 in MODEL 203 up to Model Year 8

ENGINE 272.942 in MODEL 171 up to Model Year 8

ENGINE 272.943 in MODEL 211, 219

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251 up to Model Year 8

ENGINE 272.946 in MODEL 221 up to Model Year 8

ENGINE 272.960 in MODEL 203 up to Model Year 8

ENGINE 272.963 in MODEL 171 up to Model Year 8

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221 up to Model Year 8

ENGINE 272.966 in MODEL 230 up to Model Year 8

ENGINE 272.967 in MODEL 164, 251 up to Model Year 8

ENGINE 272.970 in MODEL 203 up to Model Year 8

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221 up to Model Year 8

ENGINE 273.922 in MODEL 221 up to Model Year 8

ENGINE 273.923 in MODEL 164 up to Model Year 8

ENGINE 273.924 in MODEL 221 up to Model Year 8

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251 up to Model Year 8

ENGINE 273.965 in MODEL 230 up to Model Year 8

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221 up to Model Year 8

ENGINE 272.940 in MODEL 209

ENGINE 272.960 in MODEL 209

Electric air pump. description of components

P14.30-2099-81

Shown on ENGINE 272

126/1 Left shutoff valve air injection (combination valve: Check valve integrated)

126/2 Right shutoff valve air injection (combination valve: Check valve integrated)

M33 Electric air pump

Location

The air pump is located upstream of the intake manifold.

Task

The electrical air pump pumps the injected air to the exhaust side of the engine.

Design

Electrically operated vane-type pump. The injected air is drawn from the air filter (clean air side) and driven via two pressure connections via the air shutoff valves to the outlet ducts.

Electric air pump. description of components

P14.30-2096-01

M33 Electric air pump

a Air intake from the right air filter housing

b Injected air to the right air injection shutoff valve

c Injected air to the left air injection shutoff valve

Function

The electric air pump is actuated when air injection is enabled via the air injection relay at the same time as the air pump switchover valve for a maximum of 40 seconds. Its power consumption at 13 V is approx. 45 A.

This draws the injected air from the air filter (clean air side) an and drives this via two pressure connections via the air shutoff valves to the outlet ducts. If the air pump runs for longer than around 4 minutes, for example due to an incorrect actuation, it will be damaged.

Following actuation, air injection remains locked. A new enable of the air injection will only take place if the catalytic convertors cool down again due to a sufficiently long stoppage of the engine. The electrical air pump thus has sufficient time to cool down again.

Air injection may be actuated deliberately using STAR DIAGNOSIS for a maximum

of 2 minutes. Prior to the next actuation, it is essential to maintain a cooling time of 30 minutes, otherwise the air pump may be damaged.