[Hanno Spoelstra]

An article in Wheels & Tracks magazine issue no. 34 on Chevrolet Wreckers gives some info on Arcticized vs. Winterized equipment:

(...)
(c) BRKD-3, as (b) but with No. 13 cab and arcticized (to -40° F). Body 4G1 for Holmes W45CE, 4G2 for Gar Wood CA5P crane. These bodies, which differed only in detail, were a development from the 4D1 above, with certain improvements. The 4G2 had a jerrican and oil can carrier instead of the earlier type POW (petrol, oil, water) carrier.
(...)
(e) BRKD-5, as (d) but winterized (to -20° F) and improved winch cable fairleads front and rear, and revised rear towing hook mounting.

Arcticized equipment (to -40° F) was produced in 1942 to Specification OA99 and fitted to CMP vehicles supplied under Contracts S/M 2563, 64, 66-74 and 2613 and 19, and Specification OA111 for the USSR. It comprised special fuel primer (for starting only), engine oil predilutor, cab heaters, under-chassis heater, tyre chains and detail changes to ignition and brake system, lubricants, fuel pump, thermostat, etc.

Winterized equipment was to Specification OA199 and intended to facilitate operation at ambient temperatures down to -20° F.

Does anyone have access to Specifications OA99, OA111 and OA199?