SFN-20240118E Install new stanchion

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TICO Document #: SFN-20240118E (formerly TES 136)

Description of Procedure: A new “Vee” shaped stanchion has been design to eliminate the base plate cracking issue. The stanchion has been relocated forward over a channel support in the fender. A cross brace has been added to the mirror loop to reduce the vibration seen in the mirror heads. The new stanchion has a tapered shape to reduce the “blind spot” caused by the post itself. The new “Vee” shape reduces the weight of the post by 22 lbs.

Units Affected: Units build between February 2014 to November 2014.

Parts Required: MIRROR STANCHION FIELD KIT 72644

Planned Labor: 30 min

Instructions:

  1. Park vehicle on flat surface, apply parking brake, and chock wheels. If your company utilizes a “Lock Out, Tag Out” policy, you should employ it during this procedure.

  2. Remove the old mirror stanchion from fender. Stanchion is held onto fender with 3/8-16NC bolts and nuts. Remove mirror loop and mounting brackets from stanchion, by removing the three 5/16-18NC bolts and nuts from each mounting bracket. Retain these parts they will be installed on new stanchion. If heater or motorized mirrors are installed, disconnect the wire harness and remove from stanchion.

  1. Using drawing 72643A, lay out the new hole pattern for the new stanchion (P/N 91923). If you have a large number of fenders to modify, contact TICO’S Mr. Joe Moore @ 843-536- 8143 for a hole location template, template provides location for a center punch to mark the hole pattern. The template (SK0024-1) contacts the front and outside edges of the fender. Use center punch mark holes as provided in the template. Drill four new holes using a 9/16 drill. In addition to the four new holes for mounting the stanchion, drill out two existing 7/16 diameter holes in fender to 9/16 diameter. These two holes will be plugged.

  1. Locate template ( SK0024-1) on fender with sides against front and outside edges of fender as shown below.

  1. Install new mirror stanchion (P/N 91923) on fender. Place clamp plate (P/N 91920-5) underneath fender across the channel-shaped fender support. Install four ½ -13nc bolts, nuts, and washer.

    Note: when installing bolts, they should be straight up and down with fender. If not, rotate the clamp plate. The four holes in the mounting plate are not symmetrical, rotate clamp plate until bolts are straight. Torque nuts to 80 ft./lbs.

  1. Install cap plugs (91515, 91515-7) in open holes on the fender. Plugs have a slight press fit.

    Note: the third 5/8 diameter hole plug goes in the top of the mirror stanchion.

  1. Install mirror loop brackets on top and bottom legs of stanchion using the 5/16-18NC bolts, washer, and nuts that you previously removed. Ensure rubber isolator is installed between mirror bracket and stanchion bracket. Torques nuts to 75 in./lbs.

  2. If unit is equipped with 98” width mirrors, the mirror loop is replaced with a new 14” width loop (50236). If a unit has 122” width mirrors, the loop is already a 14”loop.

  1. Install mirror clamp on upper mirror loop. Remove 3/8-16 NC bolt and compression spring from lower loop bracket. Install lower stabilizer bar with a foot over the lower mirror loop. Replace the compression spring and 3/8-16NC bolt and nut. Install upper stabilizer bar, placing bar between the ears of the clamp. Orientate the upper clamp on the loop outward as far as possible without interfering with mirror head and tighten bolt. Torque lower bolt with compression spring to 75 in./lbs. Tighten set screw on collar to lock stabilizer bar.

  1. If mirrors are heated or motorized, connect electrical harness—route harness along loop and down stanchion. Secure harness using studs provided and plastic ties.

  2. Adjust mirror for driver’s vision.

Note: if a convex spot mirror is utilized, it should not be attached to the bottom leg of the west coast mirror. To reduce mirror vibration, install a convex mirror using a separate clamp to the mirror loop.

  1. Remove “Lock Out, Tag Out” plaque.

  1. Return vehicle to service.