MAXPEEDINGRODS 2500HD Air Suspension Spring Kit Installation Guide

: June 15, 2024
: MAXPEEDINGRODS

AIR SPRING KIT

INSTALLATION GUIDE

FIT FOR GMC SIERRA AND CHEVROLET SILVERADO

REAR AIR HELPER SPRING LEVELING KIT

AIR SPRING BAG KIT LIST

Mounting brackets

1		2X Upper mounting bracket (Left and Right)
2		2X Lower mounting bracket
3		2X Fastening block
4		4X Rolling plate
5		1x Wire clamp

Air Spring Bag and Air line

6		2X Air spring bag
7		1x Air line φ6*1(5m)

All Hardware kits

8		4X Carriage bolt M101.590
9		4X U-bolt M101.590-109*175
10		4X Hex flange bolt M101.525
11		3X Hex head bolt 5/16-22UNF*10
12		12X Hex nylon nut M10*1.5
13		8X Hex head screw M101.516
14		4X Hex nut (3mm thick) M8
15		12X Flat washer M10
16		5X Flat washer M8
17		2X Rubber gasket φ17φ72
18		2X Anti-skid washer φ8
19		1x Hex flange nut M10*1.5
20		2X 90° Air Hose Fitting R2 1/8(male)
21		2X Inflation valve 1/8 (with cap)
22		6X Zip tie (190*5)
23		1x Heat shield
24		2X Hoop band φ115
25		1X Thermal sleeve

PRE-INSTALLATION NOTICE

This product will not increase the load capacity of your vehicle.
Do not exceed the manufacturer’s recommended weight limit.
The installation process may require drilling, professional installation is recommended to ensure personal safety.
All modifications must be installed by qualified personnel and in compliance with your local modification regulations.

INSTALLATION GUIDE

Non-fifth-wheel
DRIVER’S SIDE

ASSEMBLING THE AIR SPRING

NOTE:
The U-bolt is often used on non-fifth-wheel hitch or non-gooseneck models.

REMOVING THE JOUNCE BUMPER AND SOME BRACKETS

STEP 1. Raise the vehicle and support it using safety stands so that the axle can be safely dropped away from the frame, and the air spring assemblies can be put into position between the axle and frame.
STEP2. Remove the jounce bumper from the frame.

STEP3. Remove the bolts that securing the emergency brake line to the the frame on the driver’s side.

STEP 4. Loosen the original bolt that holding the emergency brake line bracket under the leaf spring on both sides.

PLACING THE ASSEMBLY ON THE AXLE

STEP 1. Place the assembly on the axle.

INSTALLING THE UPPER BRACKET

STEP 1. Install the U-bolts ( 9 of the Air spring bag kit list)with Upper mounting bracket ( 1 of the Air spring bag kit list), then tighten the bolts with washers and nuts. Please pay attention not to insert the wire harness between the U-bolts and the frame.

NOTE:
If your car has a fifth-wheel hitch or a gooseneck, you may need to drill two 3/8″ holes on the frame that line up with the center hole of the Upper mounting bracket.

STEP2. Install the emergency brake line to the upper mounting bracket with the Wire clamp ( 5 of the Air spring bag kit list).

INSTALLING THE LOWER BRACKET

STEP 1. Adjust the assembly so that the air spring is perpendicular to the bottom and top mounting brackets without twisting.

STEP2. Install the Fastening block ( 3 of the Air spring bag kit list) to the axle and fit together with Lower mounting bracket ( 2 of the Air spring bag kit list).

STEP3. Attach the brake line bracket to the Lower mounting bracket with Hex bolt ( 11 of the Air spring bag kit list).