MIL-T-62110 Trucks, Maintenance: With Rotating Hydraulic Derrick, 32,000 To 44,500 Gvw, 4X2, 4X4, 6X4, And 6X6, CommercialThis specification covers maintenance trucks with a rotating and telescoping hydraulic derrick. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58

MIL-T-62110G

3.9.2.2  Cable guards.  Two hinged cable roller guards shall be furnished on top of the derrick boom, one near the front, the other near the rear.  The guards shall retain the cable and allow up and down movement of the cable.  Rollers shall be furnished above and below the cable.

3.10  Derrick controls.  A complete set of hand-operated controls for the hydraulic turret, derrick assembly, winch, digger, and pole grabber shall be provided.  All gages, controls, and switches furnished shall be mounted to resist shock and shall be weatherproof.  The centerline of the controls shall be at least 4 inches apart.  The controls shall be self-centering and shall revert to a neutral position when released by the operator.  A safety interlock system shall be provided to prevent operation of the derrick assembly when the outriggers are not extended.  A means

shall be provided to retract the derrick assembly and rotate the turret into stowage position, and

retract the outriggers in the event of hydraulic failure.  The switches, instruments, and pressure gages on the control station shall be panel mounted and identified as to their function and installed in a manner to facilitate removal and servicing.  Gages and instruments shall be provided and shall be waterproof and weatherproof.  Identification markings shall be on

photo-etched, corrosion-resistant metal plates.  At least the following gages and controls shall be furnished on the console or the dual controls for type I, on the console for type III, and in the left rear compartment control cabinet for type II:

(a)   Key-operated 3-wire, remotely operated start and stop switch

(b)   Foot operated engine throttle

(c)   Tachometer for each control location

(d)   Dash light(s) with rotating shields and toggle switch to illuminate control panels

(e)   Pressure and temperature gages for the hydraulic system

(f)    Restricted return line filter warning light.

3.10.1  Controls on rotating turret, type I and type III.  Unless dual side controls are specified for type I (see 3.10.2), controls for type I and type III shall be furnished on a control console on the rotating derrick.  An operator's seat shall be furnished.  Access to the control console shall be provided as specified in 3.5.1.2.  The control console shall be weatherproof. The operator's platform shall be furnished with safety tread steel plate or grating.  A

weatherproof cover shall be provided to cover the controls.  Means shall be provided to retain the cover.

3.10.2  Dual side controls, type I.  When specified (see 6.2), dual controls for type I shall be provided on each side of the turret.  The controls shall be identified as to their function.  The identification plates shall be located at the controls.  Access to controls shall be provided as specified in 3.5.1.2.  The control panels shall be weatherproof.  The operator's platform shall be furnished with safety tread steel plate or grating.  A weatherproof cover shall be provided to cover the controls.  Means shall be provided to retain the cover.

37