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TROLLEY ROCKER PRINCIPLE - TM-55-1930-209-14P-13_114
WHEEL TROLLEY

TM-55-1930-209-14P-13 Water Purification Barges (1930-01-234-2165) Equipment Montoring System Manual
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SPANMASTER TROLLEYS The Spanmaster line of monorail trolleys has been designed with an eye first to quality and service- ability and secondly to economy for the different capacities and service factors for which the various trolleys are designed and offered. WHEELS: All wheels are made from high alloy forged steel.  Treads are accurately machined and hardened to 425-480 Brinell. BEARINGS: All trolley wheels are equipped with first quality precision ball bearings which are lubricated and sealed at assembly.  This feature eliminates the necessity for periodic checks and lubrication of the wheel bearings and assures satisfactory  bearing  life  even  under  adverse  operating  conditions.  For  special  conditions  where  unusual  factors  are present  the  wheel  assemblies  can  be  equipped  with  pressure  lubrication  fittings.    Spanmaster  wheel  assemblies  are designed  to  permit  replacing  a  bearing,  if  necessary,  without  having  to  replace  the  entire  wheel,  bearing  and  axle assembly. SIDE ROLLERS: Several of the heavier series of trolleys are available equipped with lubricated and sealed precision ball bearing, heavy, heat treated side guide rollers.  These side roller trolleys are generally recommended for use on high speed, high service, power driven equipment.  When used in this manner this type of trolley can materially extend the life of the rail by eliminating the scuffing action of the wheel flanges on the edge of the rail.  Where there are curves in the system they also serve to guide the trolleys into and out of the curves when operating at high speeds. TWO WHEEL TROLLEYS: It will be noted that each trolley series includes a two wheel trolley.  These two wheel trolleys are the basic assembly used to make up the various four wheel trolleys.  They may also be used in pairs to mount on carriers, racks, etc., and suitable fittings are shown for that purpose.  These two wheel units must not be used singly to carry a load since they will not operate properly if so used. TROLLEY WHEEL MOUNTING In the interest of easy installation and maintenance it is highly  desirable  that  trolley  wheels  be  easily  in-  stalled or  removed  while  the  trolley  is  on  the  rail.  Spanmaster trolleys   are   equipped   with   a   unique   feature   which permits     this     interchangeability     of     wheels     without removing the trolley from the rail. In the accompanying sketch   you   will   notice   that   there   is   a   "Wheel   Axle Bushing" which fits the bore in the trolley yoke and also accommodates  the  axle  of  the  wheel  assembly.    This bushing  is  prevented  from  slipping  or  turning  by  the clamping bolt which also engages a notch in the bushing to insure and maintain correct wheel gaging. To remove a wheel with the trolley on the rail the hexagon nut and lockwasher are removed from the axle and the clamping bolt   removed   from   the   yoke.   The   bushing   is   then withdrawn from the yoke bore as shown.  With the axle bushing removed the wheel axle will readily slip upward thru the slot in the top of the yoke thus freeing the wheel assembly from the trolley.  Replacing the wheel simply involves     the     above     procedure     in     reverse.     This interchangeability of wheels is quick and simple and can be accomplished without the use of any special tools or devices. DIMENSIONS ARE FOR ESTIMATING PURPOSES ONLY.  REQUEST CERTIFICATION FOR CONSTRUCTION. Copyright 1978 A DIVISION OF JERVIS B.  WEBB  COMPANY Page 16.2 Jervis B. Webb co. 739 MOORE ROAD, AVON LAKE, OHIO 440121 0-1-80







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