Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47)

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) Single Use Fasteners and Components Front Air Spring Seal Front Shock Absorber Upper Insulator Front Shock Absorber Seal [3x] Front Shock Absorber Seal [3x] Front Shock Absorber Spacer [2x] Front Suspension Strut Washer Special Tools CH-45400-100 Strut Compressor Adapters CH-48845 Strut Spring Compressor CH-50732-A Strut Rod Nut Socket CH-52667 Air Spring Inflator Equivalent regional tools: Special Tools

Warning

If the air lines need to be removed to perform repairs on any air suspension components, depressurize the Automatic Level Control System. This will prevent vehicle damage or personal injury.

Warning

Do NOT remove Automatic Level Control System components under any circumstances when the system is pressurized. Disconnecting a pressurized air line that is connected to an Automatic Level Control System component can cause damage to components or personal injury.

Note

ONLY use hand tools to perform the following service procedure. Removal Procedure

Note

Service mode will be automatically enabled when the ride height sensors detect the vehicle has been lifted off the ground. Service mode will automatically be disabled when the vehicle reaches 16 km/h(10 MPH).

1. Raise the vehicle until the tires are off the ground. Lifting and Jacking the Vehicle
2. Using the scan tool, deflate the air spring that will be serviced.
3. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 1

4. Disconnect the electrical connector for the electronic suspension wheel front vertical accelerometer (1) and the front air shock harness electrical connector (2).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 2

5. Unclip and reposition the chassis wiring harness bracket (1) away from the frame shock tower.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 3

6. Disconnect the air line nut (1) and position the air line aside.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 4

7. Front Shock Absorber Nut (1) » Remove [3x]

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 5

8. Front Shock Absorber Bolt (1) » Remove [2x]

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 6

9. Front Shock Absorber (1) » Remove Disassembly Procedure

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 7

1. Place the split collar (1) of the CH-45400-100 Strut Compressor Adapters onto the front shock absorber contacting the bottom of the retaining ring (2).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 8

Note

The bolts on the holder should only be hand tight. They do not need to be torqued, the tool should spin freely on the shock tube when installed.

2. Install the holder (2) of the CH-45400-100 Strut Compressor Adapters around the split collars, hand tightening the bolts (1).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 9

Note

Since the spring was deflated before removing from the vehicle, the spring compressor is just used as a holding fixture to loosen the top nut. Only minimal pressure is required to hold the spring assembly.

3. Install and secure the front shock absorber (1) with CH-45400-100 Strut Compressor Adapters into the CH-48845 Strut Spring Compressor (2) ensuring that it is properly positioned as shown.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 10

4. Remove the electrical terminals from the electronic suspension position sensor electrical connector (1).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 11

5. Using a small screwdriver (1) depress the valve (2) to relieve any remaining pressure in the air spring.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 12

6. Remove the front suspension upper mounting cap (1).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 13

7. Remove the front shock absorber shock rod mount nut (1) using CH-50732-A Strut Rod Nut Socket (2) and a suitable wrench to hold the shock rod.
8. Remove the front shock absorber from the CH-48845 Strut Spring Compressor.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 14

9. Remove the front air spring (1) from the front shock absorber.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 15

10. Remove and DISCARD the upper front shock absorber spacer (1).
11. Remove and DISCARD the front air spring seal (2).
12. Remove and DISCARD the lower front shock absorber spacer (3).
13. Remove and DISCARD the front shock absorber upper insulator (4).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 16

14. Remove and DISCARD the front shock absorber seal (1).
15. Remove and DISCARD the front suspension strut washer (2).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 17

16. Remove the jounce plate assembly (1).

17. Remove the front lower spring seat (2).

18. Front Shock Absorber Seal (3) » Remove and DISCARD [2x]

19. Inspect the components and replace as necessary. Assembly Procedure

20. Front Shock Absorber Seal (3) » Install NEW [2x]

21. Install the front lower spring seat (2).

22. Install the jounce plate assembly (1).

Note

Ensure the concave (beveled) side of the strut washer is facing down. The o-ring should rest on the flat surface of the spacer.

4. Install the NEW front suspension strut washer (2).
5. Place electrical tape around the threads of the front air shock to prevent damage to the seal in the front air spring.
6. Install the NEW front shock absorber seal (1).

Note

Ensure the recess of the upper insulator is facing down.

7. Install the NEW front shock absorber upper insulator (4).
8. Install the NEW lower front shock absorber spacer (3).
9. Install the NEW front air spring seal (2).
10. Install the NEW upper front shock absorber spacer (1).

Note

Use mechanics wire to guide the harness through the front air spring.

11. Install the front air spring (1) to the front air shock.
12. Remove electrical tape from front air shock threads.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 18

13. Identify the stud (2) in relationship to the airline valve (1).

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 19

14. Ensure the identified stud (1) is aligned to the Shock absorber bushing barrel (2).

Note

Since the spring was deflated before removing from the vehicle, the spring compressor is just used as a holding fixture. Only minimal pressure is required to hold the spring assembly.

15. Install and secure the front shock absorber (1) with CH-45400-100 Strut Compressor Adapters into the CH-48845 Strut Spring Compressor (2) ensuring that it is properly positioned as shown.

16. Install and tighten the front shock absorber shock rod mount nut (1) using CH-50732-A Strut Rod Nut Socket (2) and a suitable wrench to hold the shock rod. Fastener Specifications

17. Install the front suspension upper mounting cap (1).

18. Install the electrical terminal to the electronic suspension position sensor electrical connector  (1).

Caution

Failure to inflate the Air Spring with CH-52667 Air Spring Inflator PRIOR to installing the Air Spring into the vehicle will not allow the Air Spring to be properly seated against the spring seat, and will result in an air leak at the O-Ring Seals. Failure to properly inflate the Air Spring can cause component damage or personal injury.

19. Using CH-52667 Air Spring Inflator, adjust the regulator to 4 bar (60 psi) and fill the front air spring.

20. Remove CH-52667 Air Spring Inflator.

21. Remove the front shock absorber from the CH-48845 Strut Spring Compressor.

22. Loosen the bolts (1)  and remove the holder (2) of the CH-45400-100 Strut Compressor Adapters.

23. Remove the split collar (1) of the CH-45400-100 Strut Compressor Adapters from the front shock absorber from under the retaining ring (2). Installation Procedure

Note

Prior to installing the front shock absorber, you MUST apply anti-corrosion wax to the frame shock tower.

1. Apply anti-corrosion wax to the frame shock tower. Anti-Corrosion Treatment and Repair
2. Support the front shock absorber using a suitable jack stand.

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 20

3. Reposition the air line, then install and tighten the air line nut (1). Fastener Specifications

4. Front Shock Absorber (1) » Install

5. Front Shock Absorber Nut (1) » Install and tighten [3x] — Fastener Specifications

6. Remove the front shock absorber support.

Caution

Refer to Fastener Caution.

7. Front Shock Absorber Bolt (1) » Install and tighten [2x] — Fastener Specifications

8. Reposition and install the chassis wiring harness bracket (1) to the frame shock tower.

9. Connect the electrical connector for the electronic suspension wheel front vertical accelerometer (1) and the front air shock harness electrical connector (2).

10. Install the tire and wheel assembly. Tire and Wheel Removal and Installation

Shock Absorber, Shock Absorber Component, or Spring Replacement - Left Side (F47) — figure 21

11. Remove the automatic level control air supply reservoir air valve cap (1).
12. Install CH-52667 Air Spring Inflator to the automatic level control air supply reservoir air valve (2) and set the regulator on the nitrogen tank to 16 Bar (232 PSI).
13. Using CH-52667 Air Spring Inflator, open the valve on the pressure gage to fill the automatic level control air supply reservoir.
14. Using CH-52667 Air Spring Inflator and the shop nitrogen tank, fill the automatic level control air supply reservoir to 16 Bar (232 PSI).
15. Close the pressure gauge valve and remove CH-52667 Air Spring Inflator from the automatic level control air supply reservoir.
16. Install the automatic level control air supply reservoir air valve cap (1) and tighten. Fastener Specifications.
17. Partially lower the vehicle, but DO NOT let the wheels touch the ground.
18. Using GDS2 tool, use short-term inflate to increase pressure to the air springs: Front: 6 Bar (87 PSI) Rear: 5 Bar (73 PSI)
19. Using GDS2, verify automatic level control air supply tank pressure is at 16 Bar (232 PSI), if not repeat steps 11 - 16.
20. Remove the support and lower the vehicle.
21. With the vehicle off the hoist and on flat level ground, use the scan tool to reset trim heights. Trim Height Inspection