Issue date: March 08, 2011

Revised: January 03, 2013

Please reference the attachment for information regarding the aftermarket installation

of the Utility Side Skirts (USS-120A) on Refrigerated Trailers.

Any other questions regarding this service bulletin should be directed to

Utility’s Field Service Department at 800-423-6591.

Field Service Department

UTILITY TRAILER MANUFACTURING COMPANY

Attachment: 27 pages

SB-19-003

Page 1 of 1

Installing Reefer Side Skirts

USS120A

FSD

Utility Trailer Manufacturing Co

USS-120A Utility Side Skirt Installation

Guide for Reefer Trailers

Date: 01/03/2013 1

UTUSS120A Side Skirt Parts Kit Part Number Part Description Qty

GC00049 Panel .120X34”X23’W 02 Ea

03-1075-0-319 Brace Strut 14GA HT8 12 Ea

03-1075-0-320 Brace Strut Spring 1 12 Ea

03-2155-0-039 Clip C-Bar Mtg 12GA 48 Ea

03-6281-0-106 Plate Angle Mtg 12GA 12 Ea

03-6281-0-105 Plate Brace Strut Mtg 24 Ea

03-6155-0-020 Pipe Alum Std 6061-T 24 Ea

03-6268-0-068 Plate Bearing 26 GA G 12 Ea

04-0490-0-002 Nuts & Bolts for Spring Bracket 01 Bag

CB7P9654 Rivet Alum 1/4“X5/8” 01 Bag

03-2690-0-243 Decal Patent Pending 02 Ea

03-2690-0-232 Decal Notice No Fuel 01 Ea

03-0250-0-019 Angle Alum 2X2X275 1 02 Ea

03-6775-0-306 Reinf Strip Alum Pun 06 Ea

03-1102-0-409 Spring Bracket 02 Ea

03-6268-0-070 Plate Bearing for Spring Bracket 02 Ea 2

Note: Parts, Quantity and Design subject to change. Please check with UTM Field

Service for updates.

General Skirt Layout

3

Strut Components

4

Clip C-bar MTG

Plate Strut Mounting

Brace Strut Spring

Brace Strut

Pre-Assemble:

Strut Components Leave one bolt and one nut out. This allows

for the bracket to pivot for attachment to the

cross bars. Pre-assemble ALL struts prior to

assembly to trailer.

5

Bottom View

Top Side

Pre-Assemble:

Angle Mounting Plates

6

Leave out the nuts and bolts on the outside. This allows for the brackets to pivot for

attachment. Pre-assemble ALL the angle mounting brackets before assembly to trailer.

NOTE: that the angle mounting assemblies for the 4” cross bars in combination with 5 ½”

crossbars use aluminum pipe spacers

Attach: Strut Subassemblies to

the Trailer

7

Identify the crossbars where the struts are to be installed on the trailer (See Page 7).

Rotate the mounting clips to engage the crossbar, insert additional nuts an bolts and

hand tighten only. Hang struts for entire trailer and slide towards center.

Strut Layout

8

2ND CMEM AFTER

LEG SUB ASSY (24”)

Leave Struts Loose for Positioning

9

Snug tighten nuts and bolts so strut will slide, but not fall off, prior to

locating the side skirt subassembly.

Attach: Mounting Plates to

Trailer

10

Identify the crossbars where the angle mounting plates are to be installed on the trailer.

Rotate the mounting clips to engage the crossbar, tighten nuts and bolts for a snug fit

where part will slide, but not fall off. Hang angle mounting plates for the entire trailer

and slide towards center to clear skirt

Photo: Struts & Angle Mounting

Brackets on Trailer

11

Note: Refer to drawing for placement of struts

Wingplate Spring Bracket

12

Apply: Barrier Tape to the Skirt

Mounting Angle

13

Protection between the dissimilar metals

Clamp: Skirt in Place

14

Position the forward edge of the skirt at the rear edge of the leg wingplate. Locate the

rear edge of the skirt flush with the bottom rail. Position the skirt so the top edge of the skirt is as straight as possible.

Skirt mounting

angle is flush with bottom rail

Skirt is flush with back of wingplate

Clamp: Skirt to Crossbars

15

Toggle clamp in about (4) places. Place clamps on crossbars that do not have struts or

angle clamp assemblies

Install: Wingplate Spring Bracket

Mounting

16

Use the pre-punched holes in the spring bracket to back drill (2) 5/16” diameter holes

through the side skirt. Attach the spring bracket to the side skirt using 5/16” steel bolts

and lock nuts

Attach: Angle Mounting Brackets

to the Skirt Mounting Angle

17

Slide the angle mounting brackets onto the angle. Snug tighten, line drill through

mounting angle. Insert additional nuts and bolts and snug tighten. Verify that top edge

of the skirt is straight and tighten all nuts and bolts.

Drill: Strut Mounting Holes in Skirt

with Center Drill Template

18

Note: After drilling the first hole, stick an awl

in the drilled hole to hold the template in

place while drilling the remaining holes.

Remove: Plastic Protective Layer

19

Assemble: Lower Strut

20

Install bolts in skirt backup plate and through skirt and lower strut. Tighten the nuts while

holding the head of the screw. Note: the plate with the patent pending decal goes on

the second strut from the rear on each side

Final Skirt Positioning

21

Position the struts (in or out) so that the bottom edge of the skirt is as straight as possible.

Tighten all strut nuts and bolts.

Drill: Hole for Mid Turn Harness

22

Grommet: Harness Hole

23

Mount the center marker light bracket and light.

Install: Fuel Tank

24

Position the fuel tank so that the fill spout is approximately flush with the backside of the

skirt. Be sure to follow the fuel tank manufacturer’s installation instructions.

Fuel Tank Access Holes

25

Locate spout access hole so it is centered front to rear on the tank and the top of the

hole is tangent to the aluminum mounting angle. Hole saw a 5 ½” diameter hole.

Locate the fuel gage sight hole vertically in line with the spout hole and approximately

16 ½“ from the bottom of the 4” crossbars. Hole saw a 4” diameter hole. Verify all

dimensions before cutting. Use drawing as reference only.

Finished Product – Inside View

26

Finished Product – Outside View

27

Note: Patent Pending

Decal Location

Refer to skirt fabrication presentation for skirt fabrication details