BS 7901:2002 pdf download

BS 7901:2002 pdf download.Specification for recovery vehicles and vehicle recovery equipment.
5.2 Rotating shafts, housings and slideways
Any rotating, or partially rotating shafts. housings and slideways shall either:
a) be of a non-lubrication material or self-lubricating material: or b) be provided with a means of lubrication.
Any lubrication nipples shall be of a similar size and type and shall be readily accessible,
5.3 Containment of motion
The motion of the recovery equipment shall be contained within its design limits by means of limiters confurming to BS EN 12077.2,
Manually extending booms shall be fitted with a pull out limit stop and mechanical locking means for their retracted and incremental positions.
5.4 Partially slewing booms and fully slewing booms
NOTE In tlw ca of prupneary slowing rings. It ii pailicutiirly Important that the manul’aclurer is L’onsUItL’d and given detuil, of the rated Loads to hr appLied so that the correct components can be aekwtrd.
Provision shall be made to enable the boom to be mechanically locked to prevent inadvertent movement.
A slewing check device shall be fitted to prevent booms slewing uncontrollably whilst in use.
5.5 Lift and tow equipment
l.ift and tow equipment shall incorporate a means to prevent accidental disconnection of the casualty vehicle during use.
NOTE bIt and tow equipment should allow asic nod easy mnnrcsinoi to and disconnection from the casualty vehicle under adveese werking conditions,
6 Safe access
Safe means of access shall be provided to the control station(s) and to the recovery equipment for the operator. Controls shall be so positioned as not to present a hand hold” to the operator whilst gaining access to the control station or equipment.
NOTE The moans of access should hr sale in wet nod slippery cnndiuoss. for example by the usc of sup resistant siarfacre Where the fitting of lift and tow equipment to a casualty vehicle involves the operator being positioned partially beneath a raised casualty vehicle, then means shall be provided with the recovery equipment to solidly support the casualty vehicle from the ground (e.g. wheel blocks).
7 Stowage of equipment
Provision shall be made for the secure stowage of equipment on the recovery vehicle. As far as practicable, the provision for stowage of lift and tow equipment shall be on the nearside of the recovery vehicle. NOTE Attention should be given to th. prnviäan far stowage of equipment tat the recovery vehicle so that excessive oaks,, for example from 10015’ rquipnbenL is not traneinitied through the vehicle body,
S Guarding
All gear wheels, pinions and chain drives shall be guarded unless such parts are so situated in relation to the structure of the equipment as to be as safe as ifs guard were provided.
Guards conforming to BS EN 811 shall be used for protection of lower limbs and guards conforming to BS EN 294 shall be used for protection of upper limbs,
Guards shall be provided for revolving shafts and couplings unless every set screw, bolt or key on any revolving shaft is sunk, shrouded, or otherwise guarded.
9 Controls
9.1 General
All controls shall be idenifwd by a marking adjacent to the control Details of control functions shall he included in the operator’s manual (set’ 22.2.3).
Controls shall be so placed as to prevent accidental operation.
A stop control shall be located adjacent to all control stations and all remote andlor wander lead controls. The stop control shall be coloured red.
The direction of movement of control levers shall, wherever possible. be consistent with the consequential motion of the machine. Markings shall provide a clear and unambiguous indication of the relationship between the movement of the control lever at the control station and the corresponding direction of motion.
Spacing of controls shall be in accordance with prEN 13557:2002. 5.2.3.1.2. Controls shall be spring loaded to stop cxct’pt for controls which have float functions.
NOTE Controls with float (unctoOs may be hold to position by a detent or simiLar device, providing no powered movement of the equipment taken plnce when the control is Wi held, The control shall not activate equipment movement when disengaging from the hoot position.
The control arrangement shall be such that no combination of control selections by the operator can cause
a movement of the equipment not intended by the operator.
9.2 Control stations mounted upon the equipment
If one control station is provided it shall be mounted on the nearside of the recovery vehicle. Where more than one control station is provided, at least one shall be mounted on the nearside of the recovery vehicle. The order in which the controls are placed shall be the same for all stations viewed from the operator’s position.
The control station shall be situated such that the operator has a eleOr view of the revuvewy Operation.
All control stations shall be such that they can be rendered inoperative by the operator.
Control stations shall not be positioned adjacent to an engine exhaust outlet.