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5

MN-651

LoadLifter 5000

4.  Set the air spring on the lower bracket (C) aligning the two holes in the base of the air 

spring with the two outer slots in the top of the lower bracket (fig. 4).

5.  Attach the upper bracket to the assembly using flat washers (I), lock washers (J), and 

hex head bolts (N). Tighten securely.

6.  Loosely attach the lower bracket to the assembly using flat washers (I), lock washers 

(J), and hex head bolts (N) (fig. 4).

The flange on the bracket must face the outside (tire-side) of the vehicle.

POSITIONING THE BRACKETS

1.  There must be 6½ to 8 inches between the upper bracket and the lower bracket (distances 

X and Y) to install the air spring (fig. 5). It is best to use the highest envelope available 

between the upper and lower bracket. 

Failure to mount the air spring at or higher than 6½ inches can result in the air spring 

bottoming out.

2.  If you are installing this kit on a 2008 or later model it will be necessary to drill the 3/8” 

locating hole for locating the upper bracket to the frame rail. Use the template provided 

at the end of this manual to properly locate the 3/8” hole, center punch and drill a 3/8” 

hole through the frame.

BEFORE DRILLING, CHECK THE BACK SIDE OF THE FRAME FOR CLEARANCE ISSUES 
WITH THE BRAKE LINES, GAS LINES AND ELECTRICAL LINES. ANY OBSTACLES WILL 
NEED TO BE TEMPORARILY RELOCATED TO CLEAR THE AREA.

3.  Set the air spring assembly on the leaf spring over the axle (fig. 6).

On some models it may be necessary to relocate a line bracket on the inside of the frame 

on  the  driver’s  side.  Move  the  bracket  back  far  enough  to  clear  the  upper  bracket  and 

remount.

NOTE

NOTE

CAUTION

NOTE

fig. 5

X

Y

Distance must 

be no less than 

6½-8” and equal 

on both sides

Optional spacer 

to achieve proper 

mounting height

Torque u-bolt 

nuts to 16 ft/lbs

fig. 6

Bracket flange 

must face the 

outside of the 

vehicle.

Contact overloads, 

use u-bolt F

Upper and lower 

brackets must 

be parallel

Summary of Contents for 57212

Page 1: ...pletely before proceeding with installation Failure to read these instructions can result in an incorrect installation MN 651 041210 ECR 7436 INSTALLATION GUIDE Kit Nos 57212 57411 Cover illustration...

Page 2: ......

Page 3: ...ets 6 Securing the Air Spring to Brackets 7 Securing the Emergency Brake Cable 7 Installing the Air Lines 8 Attaching the Jounce Bumper 9 Checking for Leaks 9 Fixing Leaks 9 Before Operating 10 Instal...

Page 4: ...t does not alter the Gross Vehicle Weight Rating GVWR or payload of the vehicle Check your vehicle s owner s manual and do not exceed the maximum load listed for your vehicle Gross Vehicle Weight Rati...

Page 5: ...O 01525 Spacer bar 4 Item Part Description Qty P 17202 3 8 16 x 1 25 Hex head cap screw 2 Q 18468 3 8 Flat washer 8 R 18435 3 8 Nyloc washer 4 S 18207 1 2 Large flat washer 8 T 18460 1 2 Nyloc nut 4 U...

Page 6: ...nce bumpers from under the frame above the axle Save for later use Installing the LoadLifter 5000 System DANGER ASSEMBLING THE AIR SPRING UNIT 1 Set a roll plate D on both ends of the air spring A The...

Page 7: ...ou are installing this kit on a 2008 or later model it will be necessary to drill the 3 8 locating hole for locating the upper bracket to the frame rail Use the template provided at the end of this ma...

Page 8: ...template BEFORE DRILLING CHECK THE BACK SIDE OF THE FRAME FOR CLEARANCE ISSUES WITH THE BRAKE LINES GAS LINES AND ELECTRICAL LINES ANY OBSTACLES WILL NEED TO BE TEMPORARILY RELOCATED TO CLEAR THE ARE...

Page 9: ...thickness of the leaf spring stack it will be necessary to trim the U bolts fig 10 3 Check to ensure that all hardware is secure and repeat the process for the remaining side of the vehicle SECURING T...

Page 10: ...WILL ENSURE AGAINST LEAKS DO NOT USE WIRE CUTTERS OR SCISSORS TO CUT THE AIR LINE THESE TOOLS MAY FLATTEN OR CRIMP THE AIR LINE CAUSING IT TO LEAK AROUND THE O RING SEAL INSIDE THE ELBOW FITTING FIG 1...

Page 11: ...the swivel fitting a Check the air line connection by deflating the spring and removing the line by pulling the collar against the fitting and pulling firmly on the air line Trim 1 off the end of the...

Page 12: ...late the air springs to 60 PSI and ensure there is at least clearance around each bellow away from anything that might rub against them Be sure to check the tire brake drum frame shock absorbers and b...

Page 13: ...he suspension brake components Use of on board leveling systems do not require deflation or disconnection Stability translates into safety and should be the priority meaning the driver may need to sac...

Page 14: ...a hoist for service work damage the air springs No The vehicle can be lifted on a hoist for short term service work such as tire rotation or oil changes However if the vehicle will be on the hoist fo...

Page 15: ...with all products The consumer will be responsible for removing labor charges the defective product from the vehicle and returning it transportation costs prepaid to the dealer from which it was purc...

Page 16: ...t was purchased If it is necessary to return or exchange the kit for any reason If there is a problem with shipping if shipped from the retailer If there is a problem with the price Contact Informatio...

Page 17: ...ot 2 Align slot from template with the slot on the frame that is located above the axle 3 Center punch and drill a 3 8 hole that will be used to locate the upper bracket to the frame 4 Repeat for oppo...

Page 18: ...16 MN 651 LoadLifter 5000 Notes...

Page 19: ...17 MN 651 LoadLifter 5000 Notes...

Page 20: ...com Thank you for purchasing Air Lift products the professional installer s choice Printed in the USA Need Help Contact our customer service department by calling 800 248 0892 Monday through Friday 8...

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