Editing User:Eric/sandbox/Progressive Refinements (section)

=== 1949 ===
{| class="wikitable"
|+
! Date Introduced
! Chassis No.
! Unit No.
! Modification
|-
| 5 Jan. 49
| 091 914
|
| <u>Heating control cable</u>
Now: twin cable
|-
| 12 Jan. 49
| 092 498
| 123 184
| <u>Oil pump cover</u>
Now: deep-drawn sheet metal<br>
Formerly: light metal
|-
| 14 Jan. 49
| 092 918
| 123 564
| <u>Air cleaner</u>
Now: mushroom shape<br>
Formerly: pot shape
|-
| 18 Jan. 49
| 093 270
| 124 031
| <u>Lower heater channel</u>
Now: modified                                                                                  thout without hinges
|-
| 1 Feb. 49
| 094 554
| 125 426
| <u>Intake manifold support</u>
Formerly: none
|-
| 7 Mar. 49
| 096 978
| 128 051
| <u>Fan housing</u>
Now: without throttle ring
|-
| 7 Apr. 49
| 100 615
| 131 840
| [[V-Belts / Progressive Refinements|V-belts]]
Now: 1 - modified stickers, 2 - new markings
|-
| 8 Apr. 49
| 100 826
| 132 017
| [[Fuel Pump / Progressive Refinements|Fuel pump]]
Now: with blue Solex diaphragm fitted with 4 seals
|-
| 28 Apr. 49
| 101 902
| 131 133
| <u>Exhaust valves</u>
Now: operating with inserted pressure plate (except for engine numbers 133 634–668)
|-
| May 49
|
|
| [[V-Belts / Progressive Refinements|V-belts]]
Now: red marks for adjusting belt tension
|-
| June 49
| 1-0 106 637
| 137 701
| <u>Vent pipe</u>
Now: extended. Modified rear engine cover plate
|-
| June 49
| 1-0 108 091
| 139 293
| <u>Filters</u>
Now: in cylinder head vent holes
|-
| July 49
| 1-0 114 186
|
| <u>Felt cone filter</u>
Now: for engines in vehicles of type 11 A
|-
| Aug. 49
| 1-0 116 811
| 147 950
| <u>Connecting rod bushes</u>
Now: widened
|-
| Aug. 49
| 1-0 117 389
| 148 542
| [[Fuel Pump / Progressive Refinements|Fuel pump]]
Now: genuine Solex in a number of cases
|-
| Aug. 49
| 
| 
| [[Push Rod Tubes / Progressive Refinements|Push rod tubs]]
Now: several hundred engines with corrugated tube ends
|- 
| Sept. 49
| 1-0 119 364
| 150 486
| <u>[[Carburetor / Progressive Refinements|Carburetor]]</u>
Now: genuine Solex, standard equipment
|- 
| Sept. 49
| 1-0 119588
| 150 702
| <u>Piston clearance</u>
Now: 0.05 mm larger for 3rd cylinder
|-
| Sept. 49
| 1-0 120 959
| 152 050
| <u>Clutch pressure plate</u>
Now: offset F & S plate. Double thrust springs continue to be used for the time being
|-
| Sept. 49
| 1-0 119 841
| 150 956
| <u>Heating control sheets, front</u>
Now: with rubber gasket
|-
| 30 Sept. 49
| 1-0 142 902
|
| <u>Cylinder</u>
Now: higher phosphorus content
|-
| Oct. 49
| 1-0 127 560
|
| <u>Clutch lever</u>
Now: reinforced
|-
| Oct. 49
| 
|
| <u>Starting handle</u>
Now: no longer supplied
|-
| Nov. 49
| 1-0 132 535
| 163 614
| <u>Heater Box</u>
Now: with straps
|-
| Dec. 49
| from 1-0 134 921
up to 1-0 134 966
| from 166 091
up to 166 135
| [[Fuel Pump / Progressive Refinements|Fuel pump]]
Now: straight push rods with conical transition
|-
| Dec. 49
| from 1-0 135 268
up to 1-0 136 157
| from 166 439
up to 167 412
| [[Fuel Pump / Progressive Refinements|Fuel pump]]
Now: straight push rods with conical transition
|-
| Dec. 49
| 1-0 136 157
| 168 075
| <u>Push rod tubes</u>
Now: only corrugated tubes with cylindrical ends at both sides
|}