John Deere – 1023E, 1025R and 1026R – Adjust Brakes

Brake control linkage must be properly adjusted in order to provide effective brake operation within the required arc of movement of the brake pedal. The differential lock is engaged when brakes are applied in order to apply braking force equally to both rear wheels. Differential lock engagement may be affected by brake wear and brake linkage adjustment.

[1] – Park machine safely.

[2] – Block front tires to prevent machine movement. Release park brake.

[3] – Raise rear of machine and support on jack stands. Remove right rear wheel.

[4] – Remove locking pin (A), washer and pin securing brake yoke to outer brake arm.
Remove yoke from brake arm.

[5] – Remove hex bolt (B), two washers, and hex nut securing outer brake arm to inner arm.
Do not remove outer arm.

[6] – Check length of springs (D) on left and right differential lock rods (C). Adjust spring compressed length to specification if needed.

[7] –
Rotate the axle shaft while rotating the differential lock bellcrank to ensure differential lock engagement.

Engage differential lock control to rotate differential lock bellcrank (E) downward. Ensure that differential lock is fully engaged.

[8] – Hold differential lock control down to maintain differential lock engagement.

[9] – With the differential lock fully engaged, use a 17 mm socket on the transmission brake brake shaft (F) to apply and hold torque to specification.

[10] – Determine which set of holes (G) in outer and inner brake arms are best aligned.

[11] – Install M10x30 hex bolt with washers through aligned brake arm holes. Secure bolt with hex nut and tighten to specification.

[12] – Release differential lock control and rotate axle (if needed) to disengage differential lock. Ensure that differential lock shaft returns to fully released position.

[13] – Loosen hex nut (H) securing brake rod adjuster (I).

[14] – Turn adjuster several turns to lengthen brake rod.

[15] – Reattach brake rod yoke to outer brake arm with drilled pin.
a. Attach brake rod to round hole in brake arm for domestic models.
b. Attach brake rod to slotted hole in brake arm for export models.
c. Secure pin with washer and locking pin.

[16] –
Gear contact will be heard (and felt in the axle) when the differential lock begins to engage.

Rotate axle while turning adjuster nut to shorten brake rod until differential lock just begins to engage.

[17] – Rotate axle while turning adjuster nut to lengthen brake rod just until clicking is no longer heard (or felt in axle hub).

[18] – Tighten lock nut to secure adjuster.

[19] – Rotate the hub to ensure that it turns freely, without brake drag or partial differential lock engagement.
a. If brake drag is noted, repeat steps 5 through 19.
b. If partial differential lock engagement is noted, repeat steps 13 through 19.

[20] – Lock the park brake.

[21] – Check compression of brake rod spring (J). Spring should be partially, but not fully compressed.

[22] – Check brake rod extension to see if space (K) between brake rod yoke and roll pin is within specification. If the gap is not to specification, repeat steps 5 through 21.

[23] – Install rear wheels and tighten lug bolts to specification.

[24] – Lower machine and check operation of brakes and differential lock.