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GOER
	The XM 520 E1 cargo version went into production as the M 520. The one in the picture with the small crane in the back is known as the M 877. The engine was a multi fuel D333 by Caterpillar later models used the pure diesel D333C that produced 192 hp at 2200 rpm that gave the Goer a road speed up to 50 km/h and that was to much for a vehicle without suspension 30 km/h was possible without falling apart of vehicle and driver. The Goers are amphibious and can do 3 to 10 km/h in calm water by the turning of the wheels. There was no extra water propulsion. Barry Meltzer has mailed me: I was a GOER Platoon Leader in Vietnam during 1967/1968. We followed the monsoon to resupply remote artillery fire bases by taking the GOERS overland. Superb vehicle under difficult ground conditions.
	The M 559 tanker can carry 105 gallons (450 ltr) of fuel in it's 2 tanks. The Goers are 4 wheel drive in the lowest 2 gears, the rear wheels being driven by electric motors. In the high 4 of the 6 gears only the front wheels are driven. The gearbox is a power shift type. The cargo and the tanker did not carry spare tires.
	The mechanics of the XM553 wrecker are the same as the M 520 and M 559. The extra 2 tons come from the 2 spare wheels, the crane, the rear winch and the stabilizing jacks. crane = 10 tons front winch = 5 tons rear winch = 22 tons total number of wreckers build = 117
	Rene Henry from France email me the following: This Goer carries a Nike-Hercule missile for a test. That was around 1965. I do not think that it was amphibious while carrying that missile.