Dixon ZTR 5421 Operator's Manual download pdf (Page 42)

CARE AND MAINTENANCE - 5000 SERIES MODELS

PROCEDURE FOR ELECTRIC CLUTCH ADJUSTMENT

Electric clutches require periodic Air Gap adjustments to extend the life of the clutch. Listed below is both an

Air Gap adjustment procedure and an Ohms test to check for a faulty coil within the clutch. No replacement

parts are available to repair a faulty assembly. The entire clutch must be replaced.

A. AIR GAP ADJUSTMENT

1. Remove the clutch from the engine. This is recommended because it is easier to verify the gap.

2. Locate the three rivet joints which fasten the leaf springs to

the armature, (figure 1)

3. Rotate the pulley until these rivet joints are located midway

along the edge of the triangular field adapter, (figure 1)

4. Locate the three holes in the brake plate, one near each

adjustment nut. (figure 2)

5. Insert a .012 inch feeler gauge into one of the three

windows. Be careful to position the feeler gauge between

the rotor and armature faces, (figure 3)

figure 1

6. Tighten the adjusting nut adjacent to the window with the feeler gauge inserted until the gauge

fits snugly between the rotor and armature. The gap should not be so tight that the feeler

gauge cannot be reinserted after removal.

7. Repeat Steps 5 and 6 at the other two windows.

8. Re-check the air gap at each window and make minor

adjustments as necessary to achieve a consistent .012 inch

air gap.

9. Reinstall the clutch to the engine. Be sure to torque the

mounting bolt back to 50 ft. Ibs.

B. OHMS TEST:

1. Disconnect clutch from mower wiring harness which is located

on the right side of the mower frame.

2. Set the multi-meter on RX1 and attach the two leads to the

two wires coming from the electric clutch.

3. The reading you receive should be between 2.4 to 2.9 OHMS.

4. If the resistance is outside this range the clutch coil is faulty.

5. If the clutch coil is faulty, the clutch must be replaced.

figure 2

figure 3

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Dixon ZTR 5421 Operator's Manual Page 42