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Tuffer - Proximity Switch Install

INSTALLING THE PROXIMITY SWITCH BRACKET

STEP 1

Raise the boom on the loader so that the bucket is just below truck loading height. Use a large ‘C’ clamp to hold the proximity switch bracket (part number 25-00400-01) in place as near to the pivot point of the boom as possible. Refer to Figure 6. Position the bracket so that the middle hole on the upper half of the bracket is near the middle of the boom.

Figure 6, Proximity Switch Bracket Placement


NOTE: If there is not enough room to fit the proximity switch bracket outside of the boom and frame, it can be attached to the inside of the frame. Check carefully for interference with other parts of the loader!.

STEP 2

Use a second ‘C’ clamp to hold the adjustable target plate (part number 25-00401-01) in place horizontally in the middle of the boom of the loader. The large flange of the target plate should face the boom.

The target plate should be visible through all six holes in the proximity switch bracket as it passes by. Refer to Figure 7.

Figure 7, Target Plate Placement

STEP 3

Adjust the width of the target plate so that there is approximately one inch between the proximity switch bracket and the target plate. Refer to Figure 8. Tighten both adjustment bolts on the target plate.

Figure 8, Target Plate Adjustment

STEP 4

Move the loader onto a hill that slopes to the left. Raise and lower the boom several times, so that the boom moves as far to the left on its pivot pins as possible. Check the spacing between the proximity switch bracket and the target plate: it should be between 7/8” and 1 1/8”.
Move the loader onto a hill that slopes to the right. Raise and lower the boom several times, so that the boom moves as far to the left on its pivot pins as possible. Again, check the spacing between the proximity switch bracket and the target plate: it should be between 7/8” and 1 1/8”.
Make sure that the spacing does not change more than 1/8”. Permanent damage to the proximity switches will occur if the target plate comes in contact with the proximity switches!

INSTALLING THE PROXIMITY SWITCHES

STEP 1

Remove one of the large nuts from each of the two proximity switches (part number 81-00555-01). Insert the switch marked “UPPER” into the middle hole on the top half of the proximity switch bracket and the switch marked “LOWER” into the middle hole on the bottom half of the proximity switch bracket. The flat plastic face of each switch should point toward the target plate. Replace the large nuts to hold each switch in place. Do NOT over tighten the proximity switch nuts! Damage may result!
Adjust the nuts on each proximity switch so that there is 1/4” between the face of the proximity switch and the target plate. Refer to Figure 9.

Figure 9, Proximity Switch Adjustment

STEP 2

SLOWLY raise the boom and check to see that the proximity switches do NOT come in contact with the target plate. Adjust the nuts on the proximity switches if necessary. Check the spacing on a left sloping and a right sloping hill as in step 4 on page 14. The spacing between the proximity switches and the target plate should be between 1/8” and 3/8”.
Check to see that the proximity switch bracket and the target plate do not come into contact with each other, or with other parts of the loader (hydraulic cylinders, hoses, etc.) Adjust the position of the target plate or the proximity switch bracket if necessary.
Lower the boom so that the target plate is at the level of the proximity switch in the bottom half of the proximity switch bracket. The boom should be above carry position. If not, the proximity switch can be moved up one hole.


STEP 3

Route the cable on the proximity switch harness through the tube in the proximity switch bracket and back to the cab. Secure with wire ties.
Attach the metal connector at the end of the proximity switch harness to the connector on the back of the Tuffer labeled, “Proximity Switches”.

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