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DANGER:  Tongue weight beyond rating  limits will interfere with performance of 

actuator, and braking system, and the tow vehicle.

  9.  The actuator is designed for use with Free-Backing trailer brakes. To block
    braking action, (in order to back up)  with other types of brakes including disc  
    brakes, use an electric solenoid. For trailer movement when brakes are not required,  
    place the safety pin in the hole on the side of the actuator housing to block
    movement of the actuator.
  

DANGER: Failure to remove pin will also prevent forward braking. Pin must  

    be in the lower, forward hole as a safety lock for the hitch ball coupler latch  

    when towing at all times.

 

Directions Vehicle Wiring - Brake Solenoid

 

  1.  Disconnect trailer hitch and any wiring connectors from the vehicle.

  2.  Connect a 14 gauge wire to the backup (reverse) light wire of the vehicle.  This
    wire should be of sufficient length to attach to the existing vehicle/trailer
    wire receptacle. The end of this wire will require a female end that will match the  
    solenoid male connector wire. Your vehicle may have a 5 wire connection for
    this purpose.

 
  3.  For ease of use, tape or band the end of the reverse light wire to the vehicle’s  
    trailer electrical connector. 

Maintenance

  1.  Always check the brake fluid reservoir before using trailer. Make sure it is at least  
    half full. If not, re-fill to 3/8 inch below the top of the reservoir with DOT 3 brake  
    fluid. Do not use DOT 5 brake fluid. Check for leaks and repair as required.
    Never reuse brake fluid.

  2.  To extend coupler and ball life, coat both with a thin coating of grease. This will also  
    eliminate squeaking. Wipe clean and renew film each time trailer is used.

  3.  Examine the actuator for bent parts or wear each time the trailer is used.
    Replace parts as necessary.

  4.  There are no user adjustments on the actuator.

  5.  Actuator travel (shown by coupler roller path) over one inch indicates a need to  
    adjust the brakes or add fluid to the reservoir or a need to bleed the brakes and  
    check connections for leaks. Adjust per instructions found in brake installation  
    manual. In general, back-off adjusters on drum brakes from locked position, as  
    required.  Adjust Free-Backing brakes by rotating in forward direction only.  Failure  
    to adjust may result in loss of braking. Disc brakes do not require adjustment,
    check for pad wear.

Page 4

Summary of Contents for 70521

Page 1: ...Model 750E Brake Actuator...

Page 2: ...cking Brake Solenoid 4 Actuator Maintenance 4 Warnings 5 6 Bleeding Instructions 7 8 Part Diagrams and Replacement Parts 9 12 Limited Warranty 13 14 TIE DOWN ENGINEERING 255 Villanova Drive SW Atlanta...

Page 3: ...quire the use of flexible brake lines at the connection POINT on the brake caliper Follow brake manufacturer instructions 3 Use only DOT 3 heavy duty brake fluid in the Model 750E actuator Use a press...

Page 4: ...coupler or may result in coupler failure Balls smaller than 1 95 can cause shock loading and sudden disconnection Make certain ball latch is in correct position to retain the hitch ball Push latch un...

Page 5: ...5 wire connection for this purpose 3 For ease of use tape or band the end of the reverse light wire to the vehicle s trailer electrical connector Maintenance 1 Always check the brake fluid reservoir b...

Page 6: ...and fingers clear as you re set the mechanism hydraulic pressure held in the system may cause the assembly to snap back suddenly WARNING AVOID sharp turns which can cause the actuator to bind or jack...

Page 7: ...ertain that coupler latch safety pin is securely installed into coupler latch WARNING Brake laws sometimes are minimum standards and you may wish to add additional brakes to your trailer Read your tow...

Page 8: ...e stop bracket and NOT in the slot on the e stop bracket See 2A FRONT FRON To bleed master cylinder and brakes install bleeder hose on first wheel cylinder to be bled if tandem axle trailer bleed clo...

Page 9: ...cylinder See 2B The bleeding operation for that brake is complete when bubbling stops Be sure to tighten bleeder screw securely Each wheel cylinder must be bleed until all air is out of the lines Repl...

Page 10: ...00 Parts Diagram Page 9 Model 750E 7 500 lbs Capacity Part 70521 Disc Brake Part 70522 Drum Brake Model 750 7 500 lbs Capacity Part 70501 Disc Brake Part 70502 Drum Brake Model 700 7 000 lbs Capacity...

Page 11: ...ts 1A 70519KD Drum Brake Master Cylinder Kit Enclosed Model Includes master cylinder and cap 4 mounting screws with washers 2 rollers with matching nuts and bolts 1B 11286 Disc Brake Solenoid used wit...

Page 12: ...1A 3 2 1 1 4 5 5 7 1 1 6 5 Classic Model 70 Replacement Parts Page 11...

Page 13: ...h master cylinders 2 47261 Latch Kit Assembly serial numbers 16021 and above 2 47262 Latch Kit Assembly serial numbers 16020 and below 3 50302 Emergency Stop Cable E stop Breakaway serial numbers 1602...

Page 14: ...oduct replace the TIE DOWN product or repair the product TIE DOWN has sole discretion in choosing which option to provide For this LIMITED WARRANTY to apply TIE DOWN must receive notice of the alleged...

Page 15: ...AKES ACTUATORS BEARINGS HOSE AND TUBING PURCHASER S RECOURSE SHALL BE LIMITED TO ANY WARRANTY OF THE RESPECTIVE MANUFACTURERS THIS WARRANTY EXCLUDES ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNES...

Page 16: ...ENGINEERING www tiedown com 255 Villanova Drive SW Atlanta GA 30336 404 344 0000 Fax 404 349 0401 2014 TIE DOWN Inc ALL RIGHTS RESERVED Instruction 08164 2 Model 750E Brake Actuator Owners Manual 0512...

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