MIL-T-52864D
3.7.1.9 Exhaust system. Muffler and exhaust piping shall conform to the requirements of UL 558. The exhaust system shall be protected against entry of rain. Exhaust gases shall be discharged vertically above the operator's
head or at the rear or side of the truck within the plan outline of the truck. The exhaust system shall be arranged to prevent bums to the operator or maintenance personnel while operating or performing maintenance. Guards shall be provided where the placement of the exhaust system is inadequate to prevent burns.
3.8 Transmission. The transmission shall be the full torque, power-shift type in combination with a torque converter. The transmission shall provide the speeds specified on the applicable specification sheet, all of which shall be manually selected. All transmission gears shall be constant mesh. Actuation shall be controlled by a hydraulic-control-valve body mounted on or in the transmission housing. The transmission shall provide for shifting
under the full engine power through all successive speeds in each direction. The transmission shall provide controlled application of the clutches to provide smooth shifting without slippage that could damage the clutches. Oil pressure for actuation of the transmission clutches, for torque converter supply, and for transmission lubrication shall be supplied by a pump mechanically driven by the engine. The transmission and torque converter fluid shall be filtered by fullflow filter(s), having replaceable elements. The transmission shall provide for positive inching control or declutch control of the truck (throughout the entire range of engine speed) in the forward and reverse directions. The inching or declutch control shall permit
tilting and full lifting speeds with rated load while the transmission control is in forward or reverse position without vehicle movement when tested as specified herein. The inching or declutch control shall apply the service brakes.
3.9 Hydraulic system. The hydraulic system shall consist of all hydraulic components necessary for operation of the mast and forks and does not include brake, transmission, and steering-system components. The system shall provide for lowering of rated load at rate specified in 3.24.2 in the event of failure of or damage to the hydraulic hose supplying the lift cylinder. A pipe tap or straight-thread O-ring boss test point shall be located at the outlet of each pump or pressure inlet of each control valve for measuring pressure. A means to determine fluid level in the reservoir (either dipstick or sight glass) shall be provided. When nuclear safety is specified (see 6.2), the hydraulic lift system shall be fail-safe (see 6.4). A hydraulic-system relief valve shall be provided to protect the hydraulic system from excessive pressure.
3.9.1 System filtration. System filter(s) shall be furnished in the reservoir, the suction line or the return line.
3.9.2 Hydraulic pumps. The hydraulic pump(s) shall have a 1000 hour Omega rating which is less than the system filter Beta Ten rating.
3.9.3 Hydraulic control valves. Mounting of the valves shall be rigid and shall permit no vibration that may cause instability of the controls. All control-valve spools shall be spring centered with sufficient force to return the levers to the center position and retain them there throughout all operations. Spools shall not bind under any operating conditions specified herein. All exposed control-valve surfaces shall show no evidence of corrosion when operated as specified herein.
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business