Adjust Tread Adjust Shims—Tire off Ground (Preferred Method)

1. IMPORTANT: Tread adjust shims must be adjusted with machine empty with spray booms folded.

   Axles should be extended to 3454 mm (136 in.) to properly adjust the shim gap.

   NOTE: If sticking occurs, remove debris from axle knees and spray with MCB004 HiTech Lube or TY25733 TEFLON® based lubricant. Activate tread adjust in and out until free.

   Adjust tread width to 3454 mm (136 in.) so that all shim hardware can be accessed.

2. CAUTION: Sprayer with spray boom weighs approximately 16,400 kg (36,080 lb.). To avoid injury or death to you or others, lift and support an empty machine only. Only jack wheels using supplied lift bracket, 6804 kg (7.5 Ton) jack and support machine using John Deere JDG10393 shop stand or equivalent. Do not apply jack pressure at any other location on axle. Lift only one wheel at a time. Before jacking a front wheel, turn it fully outward.

   NOTE: Retain fender mounting hardware for installation of jack plate.

   
   N99732-UN-17SEP12

   
   N99931-UN-17SEP12

   A - Cap Screws

   B - Cap Screw (3 used)

   C - Fender Mount Bracket

   Remove cap screws (A), cap screws (B), fender mount bracket (C), and fender.

---




3. CAUTION: Air spring can explode if over inflated causing serious injury or death to you or others. When adjusting suspension assemblies, do not exceed 689 kPa (6.89 bar) (100 psi). Keep hands and body away from suspension linkage.

   NOTE: JDG1781 Spindle Spacers are available from your John Deere dealer.

   
   N116119-UN-04MAR15

   R4030 and R4038 Shown

   
   N116120-UN-04MAR15

   R4045 Shown

   A - JDG1781 Spindle Spacer

   B - Jack Plate

   C - Cap Screw (3 used)

   Inflate air spring and install JDG1781 Spindle Spacer (A) on each spindle.

---




4. Deflate air spring until machine is resting on spacers.

5. Position jack plate (B) and install cap screws (C).

6. Raise machine using bottle jack at location shown.

7. IMPORTANT: Support machine using JDG10393 Support Stand which has a capacity of 6804 kg (15,000 lb.). Do not use JT07365 Support Stand for supporting machine.

   There must be no load on wheel or knee before beginning adjustment procedure.

   Position suitable jackstand under axle on frame.

8. Lower machine onto jackstand.

9. 
   N100105-UN-17SEP12

   
   N101662-UN-24JAN13

   A - Cap Screws (3 Used)

   B - Jam Nuts (3 Used)

   C - Dog Point Cap Screws (3 Used)

   Remove cap screws (A).

---




10. Coat cap screws with anti-seize compound and install loosely in previous location.

11. Loosen jam nuts (B).

12. Remove dog point cap screws (C) and coat with anti-seize compound.

13. Install and tighten dog point cap screws to specification. This forces inner axle tube to opposite side of outer axle tube.

    Item	Measurement	Specification
    Dog Point Cap Screws	Torque	136 N·m (100 lb.-ft.)

14. Repeat tightening until proper torque is maintained on all three dog point cap screws.

15. Tighten cap screws (A) to specification.

    Item	Measurement	Specification
    Cap Screw	Torque (lubricated)	250 N·m 184 lb.-ft.

16. Loosen dog point cap screws 1/8-1/4 turn.

17. Tighten jam nuts to specification.

    Item	Measurement	Specification
    Jam Nut	Torque	475 N·m (350 lb.-ft.)

18. Raise machine and remove jackstand.

19. Lower machine and remove jack plate.

20. Inflate air spring and remove JDG1781 Spindle spacers.

21. Install fender in reverse order using the following special instructions:

    • Lubricate fender bracket cap screws and install. Tighten to specification.

      Item	Measurement	Specification
      Fender Bracket-to-Drive Housing Cap Screws	Torque (lubricated)	268 N·m (198 lb.-ft.)

    
    

22. Repeat procedure for remaining axles.