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21-B Trailer Suspension Maintenance Recommendations
Trailer Suspensions, Single Axle

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 Equalizer Assembly 1. Position equalizer (Item 2) in hanger (Item 1) and align the shaft holes.  Due to the weight of the components, the use of a vise is recommended. 2. Apply a rubber lubricant to the equalizer bushing (Item 4). The lubricant used should be of the type that makes rubber slippery  while  wet  but  will  dry  (for  example,  P80  rubber lubricant, water, or soap and water). 3. Using   a   hammer,   tap   the   equalizer   bushings   into   the equalizer from each side. 4. Remove  plugs  from  capscrew  holes  in  the  shaft  (Item  3) and install (finger tight) on one side of  the  shaft  a  washer (Item 5), a lock washer (Item 6), and a capscrew (Item 7). 5. Slip the shaft through the equalizer bushing. 6. In the other end of the shaft, install (finger tight) the second washer, lock washer, and capscrew. 7. Tighten the capscrews evenly from both sides to a  torque of  200-225  lb.    ft.    Use  a  low  speed  impact  wrench  to prevent galling of the components surface. 8. When  the  installation  is  complete  there  should  be  a  bead of  rubber  118"  to  3116"  in  thickness  between  the  hanger casting and washer on each side. Torque Arm Bushing Assembly 1. Place compression washer and rubber bushing on torque arm bolt and insert, through the opening in the hanger and axle seat.  It is permissible to dip the bushing into a rubber lubricant.  The lubricant used should be of the type that makes rubber slippery while wet but will dry (for example, P80 rubber lubricant, water, or soap and water). 2. Place the second rubber bushing and compression washer on the bolt from the opposite side of the torque arm.  It is permissible to dip the bushing into a rubber lubricant, following the guidelines in step (1). 3. Push the rubber bushing into the joint on the nut side before tightening, as shown in figure #1. 4. Tighten the nut to 160-200 lb.  ft.  There should be, as nearly as possible, an even build-up of rubber on each side of the torque arm between the torque arm and the hanger (or axle seat) and very little build-up of rubber between the compression washers and the hanger (or axle seat) as shown in figure #2.  Ideally, there should be between a 1/16" to 118" bead of rubber between the compression washer and casting. FIGURE 1 FIGURE 2 (page 3-1353)







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