MIL-T-62518 Trucks, Maintenance: With 9 To 37 Meters 30 To 120 Foot Multi-Position Aerial Platform, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive; four-wheel, four-wheel drive; and six-wheel, four-wheel-drive trucks having minimum gross vehicle weights GVW of 6800 kilograms kg 15,000 to 22 700 kg 50,000 pounds, equipped with maintenance bodies and 9 to 37 meters m 30 to 120 foot multi-position, articulating, boom type aerial platforms. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62518A

3.6.9 Rechargeable electrical system. When specified (see 6.2), a rechargeable electrical system shall be furnished to drive the hydraulic pump assembly, in addition to the normal power takeoff drive. The electric motor shall be mounted on the body platform in conjunction with the hydraulic pump. The motor shall have adequate output power for full compliance with all performance and lifting requirements and speeds specified herein. The mounting shall minimize transfer of vibration. The electrical system shall include:

	(a) (b)	A minimum 12-volt dc motor Industrial battery(s) of not less than 450 ampere-hour capacity
	(c)	Provisions for charging battery(s) from the vehicle alternator (see 3.4.2.3)
*	(d)	A 220-volt, single phase battery charger with a dc output capable of recharging the battery(s) in (b) above in not more than 12 hours
	(e) (f)	Hour meter Battery charge indicator
	(g) (h)	Pressure switches and control circuits Battery isolator connected to the chassis charging system which prevents a drain of the
*	(i)	chassis battery during boom operations Connection of all vehicle lights to the rechargeable electrical system to enable
		operation of the lights when this system is being used.

3.6.10 Auxiliary engine. When an air compressor is furnished (see 3.6.10.9), an auxiliary engine to drive the air compressor and the hydraulic pump shall be furnished, in addition to the normal power takeoff drive. When specified (see 6.2), an auxiliary engine shall be provided to drive the hydraulic pump assembly only, in addition to the normal power takeoff drive. The auxiliary engine shall operate on the same type of fuel as the truck chassis engine. Unless an auxiliary engine fuel tank is specified, the auxiliary engine fuel supply shall be from the chassis fuel tanks. The engine shall be mounted on the body platform in conjunction with the hydraulic pump and, when applicable, the air compressor. Mounting shall minimize the transfer of vibration. The engine shall be capable of being started and stopped from the aerial basket. The auxiliary engine shall have sufficient output power to drive all operating components other than the vehicle. When a gasoline engine is furnished, it shall be capable of warranted operation on unleaded fuel.

3.6.10.1 Engine components. The engine shall be a two or four-cycle diesel engine on truck chassis with a diesel engine or a four-cycle gasoline engine on truck chassis with a gasoline engine. The engine shall be equipped with at least the following components:

(a) Distributor or magneto type ignition (gasoline engine only) (b) Starter, 12-volt