350 S. St. Charles St. Jasper, In. 47546
Ph. 812.482.2932 Fax 812.634.6632
www.ridetech.com
Part # 19004900
4000lb. Air Over Leaf Kit – 2.5” Leaf / Side Frame
Components:
2 90006781 6.5” diameter double convoluted air spring
2 90000061 2.5” leaf spring bracket
2 90000070 Air spring roll plate
2 9000002 Upper bolt-on bracket
2 31954201 ¼” npt x ¼” tube 90 degree airline fitting
Hardware:
2 99371001 3/8” x ¾” USS bolt Air spring to lower bracket
2 99373005 3/8” lock washer Air spring to lower bracket
6 99373003 3/8” SAE flat washer Air spring mounting
4 99372002 3/8” USS Nylok nut Air spring to upper brackets
8 99431002 7/16” x 1 1/4” USS bolt Upper bracket to frame
8 99433002 7/16” USS flat washer Upper bracket to frame
8 99432001 7/16” Nylok nut Upper bracket to frame
350 S. St. Charles St. Jasper, In. 47546
Ph. 812.482.2932 Fax 812.634.6632
www.ridetech.com
REAR INSTALLATION
SUPPLEMENT FOR MOUNTING AIRSPRING ON TOP OF LEAFSPRING
1. This installation is performed with the vehicle at ride height. When you raise the vehicle to a
comfortable working height, support it by the axle housing.
2. Attach the lower airspring bracket to the top of the leafspring, preferably behind the rearend, using
the attachment hardware provided. On some models, the lip of the airspring bracket will locate in the
axle plate. NOTE: On some vehicles, a softer ride is obtained by removing leafs from the spring
pack. Be sure to leave at least 2 leafs in the spring pack for stability.
3. Attach the airspring to the lower bracket.
4. The upper bracket can now be attached to the airspring and its placement on the framerail can be
determined. If the leafspring is under the frame, the upper bracket will be a “J” shaped piece that the
airspring screws into. If the leafspring is beside the frame, the upper bracket will be an angle bracket
that will bolt on to the frame. Using the proper inflated dimensions, check for airspring clearance to
nearby obstacles. [Refer to the airspring dimension chart.] Note that the proper inflated dimensions
will not be the same as the uninflated dimensions.
5. Mark the bolt holes for drilling or clamp in place to weld.[Remove airspring before welding to avoid
weld splatter damage!]
6. Reassemble, inflate, and re-inspect for proper clearance.
NOTE: On the 88 -99 GM 1 ton chassis the F6957 airspring should be placed BEHIND the axle
for the best clearance and the most load capacity.
REMEMBER: THE AIRSPRING BELLOWS MUST NOT TOUCH ANYTHING AT ANYTIME!! IT IS
THE FINAL RESPONSIBILITY OF THE INSTALLER TO DETERMINE ADEQUATE CLEARANCE.
PLEASE CALL AIR RIDE TECHNOLOGIES IF YOU HAVE ANY QUESTIONS.
Installation using 7000series or 9000 series airspring
<<<<<FRONT
Note: airspring can be placedNote: airspring can be placed
in front or behind axle
as space permits.
axle
Installation using F6957 airspring
<<<<<FRONT
Note: airspring can be placedNote: airspring can be placed
in front or behind axle
as space permits.
axle
Typical sideframe installation
Typical underframe installation
B
air inlet
A
Tapered
Sleeve
Top
Top
Bottom
Rolling
Sleeve
Compressed Extended
Top
Ride Height
Double
Convoluted
AIRSPRING DIMENSION CHART
PART#
255C
[F6957]
224C
[F0335
26C
[F7325]
20
[F6908]
F9000
F9002
F9003
F9010
7012
7076
TYPE Capacity
@100psi
Double
Convoluted
Double
Convoluted
Double
Convoluted
Double
Convoluted
Tapered Sleeve 1500# 4.5 8”-9.5” 13” 5” A=2.75 B=1.312
Tapered Sleeve 1500# 4.5 7”-8.5” 12” 5” A=2.75 B=1.312
Tapered Sleeve 1500# 4.5 6”-7” 11” 5” A=2.75 B=1.312
Tapered Sleeve 2000# 6.5” 10.5”-11.5” 16” 6.5” .750 SAE/.250npt
Rolling Sleeve 1020# 4” 7.5”-8.5” 13” 5” .750SAE/.125npt
Rolling Sleeve 800# 2.25” 5”-6” 9” 4” .750SAE/.125npt
2040# 3”[built in
3150# 3” 5”-6” 8” 8.0” A=2.75 B=1.312
3400# 3” 5”-6” 10” 8.5” A=2.75 B=1.312
4790# 3” 7”-8” 11” 9.9” A=3.50 B=1.75
Compres
s Height
bumpstop]
Ride
Height
4.5”-5.5” 7” 6.5” A=1.75 B=.875
Max.
Height
Max
Diameter
Bolt Pattern
CAUTION!!! EXCEEDING THESE DIMENSIONS MAY RESULT IN SUDDEN AIRSPRING
FAILURE! PROPER CLEARANCES MUST BE MAINTAINED AT ALL RIDE HEIGHTS AND
STEERING ANGLES. BUMPSTOPS MUST BE USED TO LIMIT SUSPENSION TRAVEL BEFORE
THESE DIMENSIONS ARE EXCEEDED.
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