M201 - lubrication / lubrification
Occasionally I have come across examples of french army jeeps with markings stencilled under the bonnet. In all cases observed so far these refer to lubricants and fluids.
In the case of the jeep above (no. 25274), C 642 is a military reference to SAE 30W preservative engine oil used for jeeps held in reserve. The jeep in question was sold at auction with a very low mileage on the clock and in almost perfect condition.
The second and more striking example from Christophe Muller contains references to NATO / OTAN codes indicating that the jeep remained in active service probably into the 1990s. At the time of writing (2006) these codes remain current and are as follows:
usage NATO / OTAN civilian moteur / engine 0 - 180 SAE 30W boites / gearboxes 0 - 226 Hypoid SAE 80W90 ponts / axles 0 - 226 Hypoid SAE 80W90 freins / brakes H 542 synthetic brake fluid graisse / grease G 414 no detail available
Examples of lubrication details stencilled under the hood are quite rare, particularly as many M201s have been repainted since their sale at auction. I came across the next example at Beltring this year (2011) and it must rate as pretty unusual.
As previously explained, C642 is a reference to SAE 30 oil for the engine but what makes this hood unusual is the chassis lubrication diagram which is stencilled in silver with the grease points marked with yellow dots. Also in yellow are an arrowhead with AV (avant / front) and COND, the meaning of which escapes me at present.
Obviously the engine oil specified for jeeps would have depended on the climate of the region in which they were operating (hot or cold). Multi-grade oil was also specified. The example on the left is from Nigel Patterson (M201 no. 22380) and is from an earlier period when the code OMD 60-110 referred to multigrade SAE 20W30.
If you have a jeep with similar markings please do let me know by e-mail. If the codes are not listed on this page I can look them up in the army document MAT 2835.
Thanks to Christophe Muller and Nigel Patterson for the second and last photos and to JLM for deciphering the military product codes. Also thanks to Ken Chapman for sending me another example below.
More information about ANTIGEL (antifreeze) markings can be found here