Motobilt MB1110 User manual

MB1110 JT Gladiator Crusher Rear Bumper Contents
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
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Paint or powder coat all Motobilt parts to your desired colors.
Place vehicle in park. Apply park brake.
Disconnect negative terminal on battery.
Lower & remove spare tire.
These instructions are shown with a Jeep TJ with an aftermarket engine. Stock motor mounts
will be in different locations.
NOTE:
Please read through all instructions prior to installation. Some factory hardware is reused
for this installation. If your vehicle is NOT equipped with the optional rear rock rails located
behind the rear tires, then you will require our MB1111 Rear Corner Supports (sold separately)
prior to your installation.
NOTE:
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Disconnect rear bumper wiring harness
at two (2) locations. Move the red tab
outwards then press on the connector to
disconnect.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Disconnect trailer 7 pin connector from
inside the bumper.
Using a T-50 Torx socket, remove two (2)
M10 bolts located on the underside of the
hitch cross frame member.
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Using a at screwdriver, remove the
license plate.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Using a 15mm socket, remove two (2)
bolts located behind the license plate.
OPTIONAL REAR ROCK RAILS:
If your vehicle is equipped with the
optional rear rock rails located behind
rear tires, you may reuse the mounting
brackets holding the rock rails to the
frame. Remove only the rock rails from
the mounting bracket, keeping the
mounting bracket attached to the frame
(each side).
Using a 15mm socket, remove three (3)
bolts from the underside of the rock rail.
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Using a 15mm socket, remove two (2)
nuts that fasten the rock rail to the
bumper.
Repeat Steps #11 & #12 on
opposite side.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Loosen the bolts holding the rock rail
mounting brackets. Do not remove the
bolts.
If your vehicle is NOT equipped with the
optional rear rock rocks, you will need the
MB1111 Gladiator Rear Corner Supports to
complete your installation.
Using a 16mm socket, remove the four (4)
ange nuts from behind frame mounting
plates.
With all fasteners removed & wiring
disconnected, remove the factory rear
bumper from the vehicle.
If your vehicle is equipped with optional
rear tow hooks, remove these tow hooks
now.
Using a cut off wheel, remove a small
portion of metal above the factory
receiver hitch (as shown removed). Apply
paint to cut edges of bare metal if desired.
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Preparing for installation
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Place the factory bumper face down with the wiring harness facing up.
Label the positions of all connections & park sensors (if equipped). Example: Park Sensor – Outer
Driver, Park Sensor – Middle Driver, Park Sensor – Outer Passenger, Park Sensor – Middle Passenger,
Connector – Driver, Connector – Passenger, License Plate Light – Driver, License Plate Light –
Passenger. The wiring connectors that connect the bumper wiring harness the vehicle’s main wiring
harness on the driver side are a different shape than the wiring connectors on the passenger side.
Labelling them now will ensure you position the bumper wiring harness correctly into your new
Motobilt bumper. Also, the positions of the park sensors (if equipped) must be placed back into their
relative positions in the new bumper.
Disconnect the four (4) park sensors (if equipped) by opening the plastic bezels slightly with a
screwdriver to remove them.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Remove the factory rear bumper wiring
harness from the factory bumper.
Install Covers MB1110-10, MB1110-11 &
MB1110-12 with the supplied Hex Button
Screws #10-24 x ¾” long & #10-24 Nylock
Nuts. Use a 1/8” hex bit & 3/8” wrench.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Install MB1110-13 (Harness Tie Plate) with
tab facing up using ¼” x 1.0” L Hex Button
Screw & ¼” Nylock Nut. Install license
plate & tag light during this same time.
If equipped, install park sensors by
placing the sensor in the hole then
position MB2117-01 Sensor Retainer plate
over the back side of the park sensor.
Fasten using #10-24 x ½” long Hex Button
Screw (4 places total)
Route the wiring from the factory bumper
wiring harness near the underside of the
top inside edge of the bumper. Use our
integrated zip tie mounts to neatly secure
your wiring.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
If adding a light over your license plate/
tag, then splice into one of the two factory
light connectors shown.
With the bumper assembled & wiring in
place, grab an assistant to help you lift
the bumper by supporting each end &
align the four (4) threaded studs with the
mating plates in the rear frame. Loosely
fasten using four (4) 7/16” Flat Washers
& four (4) 7/16” Hex Flange Nuts. Do NOT
tighten nuts yet.
Loosely install four (4) 7/16” x 1.0”
Hex Bolts (two each side) to mate the
underside corners of the bumper with
the Frame Rail Brackets. Use two (2) 7/16”
at washers & a 7/16” Nylock Nut for each
bolt. Do NOT tighten yet.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Loosely install two (2) M10 x 25mm Hex
Bolts & at washers to the hitch cross
frame member underside where shown.
Do NOT tighten yet.
With all fasteners loosely installed,
measure the gaps on each side between
the body & the bumper. Adjust left or
right as needed. Tighten all fasteners
including the Frame Rail Brackets.
If installing cube lights (optional), bolt
them into place using the built-in cube
light mounts. Wire each light to a 12 volt
source & switch.
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MB1110 JT Gladiator Crusher Rear Bumper – Installation Instructions
Connect the bumper wiring harness to
the main chassis wiring harness in two (2)
locations
Connect the trailer 7 pin wiring connector.
Check all lights & park sensors for proper
operation.
Check & tighten all fasteners after 50
miles then every 500 miles thereafter.
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