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WARNING

A minimum of 5% tongue weight and a maximum 10% tongue weight of the trailer 
G.V.W.R. must be located on the hitch ball. The Trailer tongue should be parallel to the 
ground. Too much weight can cause premature brake actuation and loss of control of the 
towing vehicle. To little tongue weight can cause the trailer to fishtail, resulting in loss of 
control of the tow vehicle and trailer (total trailer weight G.V.W.R. includes weight of the 
trailer plus load).

WARNING

A loose fit between the coupler and hitch ball can cause the actuator and hitch ball to
separate, causing serious damage, injury or death. Check coupler every time prior to
towing and at each stop on long trips.  Always make certain 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  vehicles owner’s manual on towing capacity and 
other towing recommendations before installing brakes or this actuator.

WARNING

Never allow the coupler latch safety pin to remain in the reverse lockout position hole.  
After reverse maneuvering, always insert coupler latch safety pin back into coupler 
latch.  

FAILURE TO REMOVE SAFETY PIN FROM REVERSE LOCK OUT POSITION HOLE 

WILL PREVENT FORWARD MOVEMENT BREAKING WHICH CAN RESULT IN SERIOUS 

PROPERTY DAMAGE, INJURY OR DEATH. 

WARNING

Tie Down actuators and brakes are designed to use DOT 3 (or 4) brake fluid.
Do not use of DOT 5 brake fluid. Use of DOT 5 brake fluid will cause damage to internal 
parts that can result in loss of brake power.

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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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