Rock Hard 4x4 RH-90340 Installation Manual Download Page 4

Customer Service / Tech Support: 

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Thank you for your purchase! Please read all instructions carefully prior to 

beginning installation of your Rock Hard 4x4 product. 

REMOVING FACTORY REAR BUMPER  

 

1.

 

Starting on driver side: remove factory plastic mud guard 
(if equipped) behind JL rear bumper. Use 8MM or 5/16 
socket. Remove end cap braces (if equipped) using 16MM 
socket. 2 on end cap, 2 on frame. Disconnect wiring 
harness. 3 plastic plugs. Last plug on bumper may be 
easier to remove if bumper is loose. Disconnect plug. 
Repeat process on passenger side. 

 
2.

 

If equipped with factory tow hooks, remove using 21MM 
socket, remove all hook bolts. 16MM socket removes 
bumper nuts. Remove rear bumper cross member bolts, 1 
per side, using 16MM socket. Remove bumper from 
frame. 

 
3.

 

Remove backup sensors (if equipped) by prying connect, 
then press clip towards wiring and remove sensor plug. 
Once connectors are disconnected pop plastic fasteners 
out of bumper using flat blade screwdriver. You’ll retain 
entire harness. Remove sensors from factory bumper. 
Remember which sensor was driver/passenger 
inside/outside and what orientation. Must be installed 
same orientation/location from driver to passenger. 

 

INSTALL ROCK HARD 4X4 REAR BUMPER  

 

1.

 

Remove factory trailer electrical harness (if equipped) plug 
assembly from OEM bumper.

 

 

2.

 

Remove outer 2 bolts from factory hitch in rear cross 
member.

 

 

Summary of Contents for RH-90340

Page 1: ...rockhard4x4 com Thank you for your purchase Please read all instructions carefully prior to beginning installation of your Rock Hard 4x4 product ROCK HARD 4X4 JEEP WRANGLER JL 2 4 DOOR 2018 CURRENT ALUMINUM REAR BUMPER PART RH 90340 Installation Manual ...

Page 2: ...4 product PACKING LIST 2 x 3 FULL THREAD BOLTS 2 WASHERS 4 14 X 1 5 BOLTS 4 14MM WASHERS 1 12 X 1 75 X 100 BOLT 1 12 X 1 75 X 100 SPECIAL THIN HEAD BOLT 2 12 X 1 75 NUTS 2 5 8 THICK BLOCK 1 SPECIAL LABELED BLOCK 4 PLASTIC PLUGS IF SENSORS NOT INSTALLED 1 PACK SENSOR CLIPS 4 10 X 24 X WHIZ BOLTS 4 10 X 24 KEPS NUTS 1 BLOCK OFF PLATE 1 4 PIN ADAPTER PLATE REQUIRED TOOLS xx ...

Page 3: ... 4x4 team We outsource zero processes To you that means the product you are installing is the highest quality and longest lasting component on the market To us that means you ve selected a part we ve spent years developing Each Rock Hard 4x4 part has gone through more research and development and evolution than most people realize While our parts may have the same striking look year after year sub...

Page 4: ...y tow hooks remove using 21MM socket remove all hook bolts 16MM socket removes bumper nuts Remove rear bumper cross member bolts 1 per side using 16MM socket Remove bumper from frame 3 Remove backup sensors if equipped by prying connect then press clip towards wiring and remove sensor plug Once connectors are disconnected pop plastic fasteners out of bumper using flat blade screwdriver You ll reta...

Page 5: ...ecial thin head bolt and nut 12MM x 1 75 x 100mm Head of bolt to rear of Jeep using 18mm wrench 4 Replace right side passenger bolt with 12mm x 1 75 x 100mm Head of bolt to rear of Jeep using 18mm wrench 5 Install factory towing electrical plug if equipped into Rock Hard 4x4 rear bumper or block off plate included with hardware kit using 4x 10 x 24 x flange bolts and 4x 10 x 24 locking nuts using ...

Page 6: ...l sensor holders and clips into bumper and sensors with wiring if equipped Sensor plugs must point to center of bumper If no sensors install supplied plastic plugs into bumper Install factory license plate light with factory nuts Some JL sensors may require a simple splice extension there are 2 sensor harnesses part numbers each vary in length slightly Install factory license plate light with fact...

Page 7: ...n holes Not needed on driver side since factory nuts are in place from tow hook 4 Set top lip of bumper on frame Slide 2x 1 1 2 x 5 8 x 3 1 4 blocks with 2 holes between frame and lower lip of bumper Make sure wiring is between bumper and block and will not get pinched Use 2 factory bolts from tow hook on driver side Use 2 1 2 x 3 full thread bolts with 2x 1 2 SAE flat washers on passenger side 18...

Page 8: ...x4 product 5 Install 2x 14MM x 1 50 x 40MM bolts with flat washer from outside of frame onto each side 22MM socket with short extension Tighten all hardware CONGRATULATIONS Now go wheel your rig with a whole new level of confidence and capability Please send photos of your install and wheeling adventures to sales rockhard4x4 com We love seeing our products on the trail ...

Page 9: ...imited Warranty without prior notice or obligation to upgrade your product What is Not Covered Your Rock Hard 4x4 Limited Warranty does not cover products or parts Rock Hard 4x4 determines to have been damaged by or subjected to a Installation damage alteration modification combination with other parts failure to maintain or improper repair or service b normal wear tear cosmetic damage or damage f...

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