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

(ay)      Rechargeable electrical system, if required in addition to PTO (see 3.6.9). (az)      Auxiliary engine, if required in addition to PTO (see 3.6.10).

(ba)      Auxiliary engine fuel tank, if required (see 3.6.10.6).

(bb)     Air compressor (furnished only with auxiliary engine), if required

(see 3.6.10.9).

(bc)      If a ground hydraulic tool outlet is not required (see 3.6.11.1).

(bd)     If a basket(s) hydraulic tool outlet and hose are not required (see 3.6.11.1.1). (be)      Hydraulic capstan hoist, if required (see 3.6.11.3).

(bf)      Hydraulic impact wrench and drill, if required (see 3.6.11.4). (bg)     Hydraulic chain saw, if required (see 3.6.11.5).

(bh)     Hydraulic chain saw, pole mounted, if required (see 3.6.11.6). (bi)      Hydraulic circular saw, pole mounted, if required (see 3.6.11.7).

(bj)      Hydraulic pruner, pole mounted, if required (see 3.6.11.8). (bk)     Hydraulic hose reel, if required (see 3.6.11.11).

6.3  Performance prediction.  SAE Truck Ability Prediction Procedure computations and computations for low speed and maximum geared speed will be required by the contract.  The SAE Work Sheet Item 1 should include vehicle model number, engine model number, and vehicle type, class.  Unless other conditions are cited in the contract, computations should be made for normal atmospheric pressure, normal ambient air temperature, and still, dry air.

The factors to be used in predicting truck ability (see 3.3.1.1) are established as follows for the corresponding SAE Truck Ability Prediction Procedure Tables:

Table 1                                                      -  Tire Factor.  This factor must relate to the size

of tires furnished by the contractor in accordance with this specification.

Table 2                                                      -  Altitude Factor.  1.00

Table 3                                                      -  Rolling Factor.  1.613

Table 4                                                      -  Area Factor.  0.173

Table 5                                                      -  Velocity Factor.  250.0

Table 6                                                      -  Altitude Factor.  1.00

Table 7                                                      -  Chassis Friction Horsepower.  Use applicable

power unit GVW ( to nearest, higher, tabulated

454 kg (1,000 pounds)) and the engine rpm

(to nearest 100 revolutions) which is required for 80 km/h (50 mph) geared speed.  For GVW and engine speed beyond the range of this table, factors shall be extrapolated.

Table 8                                                      -  Grade Factor.  0.75

Table 8A                                                   -  Correction Factor.  Not required.

Table 9                                                      -  Road Factor.  0.0.

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