Installation instruc tio ns – Poison Spyder CJ ROCKBRAWLER REAR BUMPER WITH TIRE CARRIER User Manual

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INSTALLATION INSTRUC

TIO

Poison Spyder Customs • TJ-YJ-CJ ROCKBRAWLER REAR BUMPER

Page 5

27. Measure the overall height of your spare

tire (NOT one of the mounted tires on your

Jeep!), divide that measurement in half, then

add one inch. The resulting number will be

your tire mount height measurement. With

the Tire Carrier closed and latched, measure

upward from the recessed step surface of the

bumper, and make a small mark on the tire

carrier at the tire mount height measurement.

28. Use (4) 7/16-14 x 1 Gr8 Hex Head Cap

Screws with (4) 7/16 Flat Washers and (4)

7/16-14 Nylon Insert Lock Nuts to attach

the Tire Mount - Carrier Side to the Tire

Carrier, centered on the mark you made in

the previous step. The slots in the tire carrier

allow for some adjustment, however if there

isn’t enough adjustment to center the Tire

Mount exactly centered on your mark, move

it up slightly to the next set of slotted holes

in the carrier. Tighten the four bolts/nuts to

approximately 50 ft.-lbs.

29. Look at the Tire Mount - Tire Side, and

note that there are wheel stud holes for

several different bolt patterns. Use the Bolt

Pattern Template provided at the end of these

instructions to determine which THREE holes

to use for your specific bolt pattern. Once

the three holes are correctly identified, mark

them with a felt-tip marker.

30. Use a shop press or hammer to drive the

three provided Wheel Studs into the mounting

plate, using the holes that were marked in the

previous step. Make sure the studs point

in the opposite direction from the V-channel

piece that is welded to the back of the plate.

31. Lay your spare tire on the floor with the

mounting surface of the wheel pointed up.

Lay a long straight edge (yardstick, level, or

other suitable item) across the middle of the

tire. Measure the vertical distance from the

straight edge to the wheel mounting surface.

This is the Overall Offset measurement,

including any bulge in the tire sidewall.

32. Fit the Tire Mount - Tire Side channel on to

the corresponding beam of the Tire Mount -

Carrier Side. Use (3) 7/16-14 X 3 Gr8 Hex

Head Cap Screws with (6) 7/16 Flat Washers

and (3) 7/16-14 Nylon Insert Lock Nuts to

secure the Tire Mount-Tire Side to the Tire

Mount - Carrier Side, using the slotted holes

provided. Adjust the position of the mounting

surface of the distance between the Tire

Mount and the surface of the tire carrier frame

is 1/4 to 1/2 inch LESS THAN the Overall

Offset measurement found in the previous

step. Once properly adjusted, tighten the

three bolts/nuts to approximately 50 ft.-lbs.

NOTE: Some tire/wheel combinations, such

as 12.50 wide tires on stock Jeep wheels,

may require more Overall Offset than the

adjustment in the Tire Mount components allows

(approximately 4-3/4” to 6-3/4”). In these cases,

source a wheel spacer of suitable thickness to

make up the difference.
33. With the help of a friend, lift the spare tire

onto the Tire Mount - Tire Side, and fit the

previously installed lug studs through the

holes in the wheel. Tighten the (3) Lug

Nuts. This will draw the sides of the tire

tightly against the frame of the Tire Carrier, to

prevent rattles and squeaks.

34. Test-close the tire carrier. Note that the

Tire Carrier is built with “pre-load”, and it

needs the weight of the spare tire to be on it

for optimal alignment of the latch mechanism.

Even with the weight of the spare tire now on

the carrier, It is to be expected that the latch

mechanism and the latch pin/receiver may not

align perfectly on the first try. You may need

to loosen the attachment hardware of the

various components of the latch assembly to

align the correctly, then re-tighten. It may also

be necessary to make sure the hinge bearings

are fully seated in order to attain proper

alignment. Once all adjustments are made,

re-tighten the latch mechanism components

and re-check for proper operation of the latch

mechanism.

35. Use (4) 1/4-20 X 3/4 SS Button Head Cap

Screws, (4) 1/4 Flat Washers and (4) 1/4-20

Nylon Insert Lock Nuts to fasten your license

plate to the License Plate Mount.

36. Use the 1/4-20 X 3 Gr5 Hex Head Cap Screw

with 1/4 Flat Washer and 1/4-20 Wing Nut to

fasten the License Plate Mount to the Tire

Mount at the center of the spare tire. Tighten

the nut enough to eliminate “play” in the

bracket.

This manual is related to the following products:

YJ ROCKBRAWLER REAR BUMPER WITH TIRE CARRIER TJ ROCKBRAWLER REAR BUMPER WITH TIRE CARRIER