Joyce LA155P User Manual

Joyce/Dayton Corp

Operation and Maintenance Manual for

Joyce/Dayton Linear Actuator

1500 Pound Capacity AC Actuator (with limit switch and potentiometer)

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WARNING !

The recommendations in this manual for installation, operation and maintenance must be followed to
ensure safe use. All persons responsible for the installation and use of Joyce/Dayton Linear Actuators
must be familiar with the contents of this manual.

Customer is responsible for guards and other protective devices and ensuring that Linear Actuator
usage conforms with local and national operating and safety codes appropriate to the class of
equipment into which the Linear Actuator is installed.

©2006 Joyce/Dayton Corp. All rights reserved FB0188A 11/06

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Table of Contents

Section I – General Information

1-2 Purpose and Scope...........................................................................3

1-3 Receipt of Product.............................................................................3

1-4 Warranty...............................................................................................3

1-5 Precautions for Use...........................................................................3

1-6 General Installation Instructions....................................................4

1-7 Limit Switch Adjustment - Initial ....................................................4

1-8 Limit Switch Adjustment – Fine......................................................5

1-9 Final Installation of Actuator...........................................................5

Section II – Maintenance

2-1 Lubrication...........................................................................................6

2-2 Repair Parts.........................................................................................6

2-3 Disassembly of Linear Actuator.....................................................7

2-4 Assembly of Linear Actuator ..........................................................7

Section III – Views and Parts Lists

3-1 Exploded View....................................................................................9

3-2 Parts List for Linear Actuator..........................................................10

Section IV – Technical Drawings and Illustrations

4-1 Wiring Diagram...................................................................................11

4-2 Limit Switch.........................................................................................11

4-3 Brake Assembly Diagram................................................................12

4-4 Travel Limit Chart...............................................................................12

Section V – Part Numbers and Ordering

5-2 Record of maintenance ....................................................................14

1-1 Contacting Joyce Dayton.................................................................3

5-1 Ordering information.........................................................................13

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Section I

General Information

1-1 Contacting Joyce/Dayton Corp.

Joyce/Dayton Corp.
P.O. Box 1630
Dayton, OH 45401
[phone] (US and Canada only)
[phone] [phone] Fax
Email: [e-mail]
Website: www.joycedayton.com

1-2 Purpose and Scope

This manual provides installation, operation and maintenance instruction for the standard 1500
pound capacity Joyce/Dayton Linear Actuator. Although this manual covers the standard Linear
Actuators, some may vary significantly from this manual. For special units not covered, please
contact Joyce/Dayton Corp. for assistance.

1-3 Receipt of Product

All equipment should be immediately inspected upon receipt for any damage and to verify correct
product and quantities. Any problems should be reported to Joyce/Dayton Corp. and the freight
carrier as soon as possible. Products returned without a Return Goods Authorization (RGA) form
will not be accepted.

1-4 Warranty

Seller warrants its products to be free from defects in material and workmanship under normal
and proper use in accordance with instruction of seller for a period of one year from the date of
shipment to buyer. Seller's liability under such warranty or in connection with any other claim
relating to the products shall be limited to the repair, or at seller’s option, the replacement or
refund of the purchase price, of any products or parts or components thereof which are returned
to seller freight prepaid and which are defective in material or workmanship. Products or parts or
components thereof which are repaired or replaced by seller will be returned to buyer freight
collect. This warranty is not intended to cover consumer products, as defined in the Magnuson­Moss Warranty-Federal Trade Commission Improvement Act, 15 U. S. C. Sections 2301-12,
which are purchased by buyer for purposes other than resale. If buyer is not intending to resell the
products, and if the products are consumer products as defined in the Magnuson-Moss Act, the
foregoing warranty, but not the limitation of seller's liability, shall be null and void. EXCEPT AS
EXPRESSLY STATED ABOVE, SELLER MAKES NO WARRANTY, EXPRESS OR IMPLIED,
WHETHER OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR
USE OR OTHERWISE, ON THE PRODUCTS, OR ON ANY PARTS OR LABOR FURNISHED
DURING THE SALE, DELIVERY OR SERVICING OF THE PRODUCTS.

1-5 Precautions of Use and Installation

1. Travel is limited using the limit switches provided. It is imperative that the limit switches be set
within the designed limits of the Linear Actuator. Exceeding the design limits can cause
damage to the internal linear actuator mechanism. Follow the procedure in Sections 1-7 and 1­8 of this manual.

2. In most applications, factory or manufacturer-assisted installation is not required. However, it is
necessary that appropriate, qualified personnel perform the installation of Joyce/Dayton
products.

3. Joyce/Dayton Linear Actuators are not rated for shock-loading or extreme vibration. It is the
responsibility of the user to ensure these conditions are not imposed on the actuator.

4. In the event that service or maintenance is required, the load must be secured or removed
before any work can begin.

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5. The Linear actuators can be mounted and operated in any orientation. Standard Linear
actuators will come with all holes plugged. Follow the procedure in Section 1-9 to properly plug
or vent the holes to prevent dirt and moisture from contaminating the actuator.

6. Never allow the actuator to retract beyond the minimum closed position or extend beyond the
maximum open position, as damage to the unit can occur. Refer to the Travel Limit Chart
provided in Section 4-4 for a list of dimensional limits.

7. External temperature may exceed 200 Degrees F. near maximum duty cycle. Use caution to
prevent personal injury.

8. Do not use actuator in applications where the unit can be jammed; that is, where the limits can
be over-traveled or the linear actuator can be pressed against an immovable object.

9. The capacitor may retain an electrical charge. Touching the terminals may result in an
electrical shock. Exercise caution when handling the capacitor.

1-6 General Installation Instructions

1. Ensure that all personnel who will service or operate equipment are familiar with its use and
limitations.

2. Secure or remove the load before any installation procedures begin.

3. Be certain the rating of the actuator meets or exceeds the load.

4. The actuator must be mounted on a rigid structure sufficient to support the maximum possible
load. An under-designed structure could lead to premature wear or failure.

5. When fastening the load to an actuator, make sure the actuator is in the retracted position.
This positions the load accurately with respect to the lifting screw centerline. Never pull the
translating tube to one side to make connection with your structure. Fully extend the actuator to
make sure the load is aligned with the translating tube.

6. Limit switches are NOT pre-set. They require field adjustment before use (See Section 1-7 and
1-8).

7. The capacitor may retain an electrical charge. Touching the terminals may result in an
electrical shock. Exercise caution when handling the capacitor.

1-7 Limit Switch Adjustment – Initial Adjustment Procedure

1. The travel limits must not be exceeded when setting the limit switches.
This means that you do not want to set the extended or the retracted position beyond the
designed travel limits of the unit.

2. Remove the screws (47), switch cover gasket (62) and switch cover (63). On units equipped
with a potentiometer, remove the nut retainer (59).

3. Rotate both Limit Switch Nut Cams (56) toward the center of the threaded shaft (55) to clear
the switches.

4. Rotate the translating tube (33) until the distance between both clevis eyes equals the
minimum closed dimension you require. This can be fine adjusted via the slot at the end of the
motor. Do not exceed the designed travel limits of the unit. Refer to the Travel Limit Chart
in Section 4-4.

5. If the clevis holes are not properly aligned, use a screwdriver to rotate the motor (3) and drive
the translating tube (33) to its proper retracted position.

6. Now adjust the limit switch nut cam (56) that controls the retracted limit. This switch has a red
electrical lead attached to it. To make this adjustment, rotate both limit switch nut cams
together on the threaded shaft until the switch is activated. You will see the switch lever
depress and hear it “click” when it is activated.

7. If a potentiometer is included on the linear actuator, it will need to be adjusted before
reinserting the nut retainer (59) as described in the next step. Holding the potentiometer so the
small pinion gear (60A) is facing you, gently rotate it clockwise until it reaches the end of travel.
Now rotate the pinion counter-clockwise ½ turn. This protects the potentiometer from being
“jammed” and its travel limits exceeded.

8. Temporarily insert the retainer nut (59) into the proper slots in the limit switch cavity and in the
slots in the cams (56). Using a marking pen, mark the slot on the limit switch nut cam (56) of
the lower limit switch. Do not mark the upper cam (56) at this time. Use screw (47) to install
the limit switch gasket and cover (62, 63) to hold the retainer nut (59) in place.

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9. Next, extend the jack to the upper limit position. This will need to be done electrically or with a
screwdriver through the electric motor. Do NOT rotate the translating tube (33). (Make sure
the two clevis ends are oriented properly.) The extended position is the maximum distance
between the two clevis eyes. Do not exceed the designed travel limits of the unit. Refer to
the Travel Limit Chart in Section 4-4.

10. Remove the limit switch gasket, cover (62, 63), and retainer nut (59). Use care not to disturb
the position of the lower cam nut (56).

11. Now adjust the upper limit switch nut cam (56). It is located nearest the translating tube (33)
and controls the extended position. This switch has a blue lead on it. Rotate this limit switch
nut cam until the switch is activated. You will see the switch lever depress and hear it “click”
when it is activated.

12. Insert the retainer nut (59) into the marked slot (for the lower setting) and the slot closest to the
position you have set (for the upper setting). Using a marking pen, mark the slot on the limit
switch nut cam for the upper limit setting.

13. If the unit has a potentiometer, do not rotate the worm. Make sure the threads on the
potentiometer pinion fully engage the potentiometer worm (57) before assembling the gasket
and cover.

14. Replace the limit switch gasket and cover (62, 63), using screws (47).

15. The travel limits are now set to their initial settings. Activate the motor to check for proper
adjustment. Sometimes after installing this actuator in your application, a fine adjustment is
required on the limit switches. To achieve the fine adjustment, follow the procedure outlined
below.

1-8 Limit Switch Adjustment – Fine Adjustment Procedure

1. Remove the limit switch gasket and cover (62, 63) and retainer nut (59). You will see the limit
switch nut cams that you marked for position. Each notch on the limit switch nut cam is equal
to approximately .050 inch of screw travel. By rotating the limit switch nut cams you can fine­tune the limit settings.

Viewing the Limit switch cavity with the lifting screw and gearbox on your right the
following adjustments can be made:

2. To retract the translating tube (33) more, that is to shorten the distance between the clevis
eyes, rotate the right-hand limit switch nut cam away from the switch lever. This activates the
switch with the red leads. Note: It is critical that you are not setting the limit beyond the
minimum travel of the actuator. Refer to the Travel Limit Chart in Section 4-4.

3. To extend the lower limit, that is to increase the distance between the clevis eyes, rotate the
right-hand limit switch nut cam toward the switch lever. This activates the switch with the red
leads.

4. To shorten the maximum travel so the travel is slightly less at the extended position, rotate the
left-hand limit switch nut cam toward the switch with the blue leads.

5. To extend the upper limit so the travel is slightly greater, rotate the left-hand limit switch nut
cam away from the switch. This activates the switch with the blue leads. Note: It is critical
that you are not setting the limit beyond the maximum travel of the actuator. Refer to the
Travel Limit Chart in Section 4-4.

6. When the fine adjustment is complete, insert the retainer nut (59) into the closest slot and mark
with a marking pen. Note: The retainer nut may now be inserted in notches other than those
you previously marked.

7. NOTE: When a potentiometer is included, it will be mounted to the retainer nut (59). Make sure
the threads on the potentiometer pinion (60B) fully engage the potentiometer worm (57) before
assembling the gasket and cover.

8. Replace the limit switch gasket and cover (62, 63) using the correct fasteners.

9. Activate the actuator electrically to test the limit switch stops. The adjustment procedure can be
repeated as needed.