background image

2

1A

1A

1A

1A

1A

Model 70

“Open” 

Master Cylinder

Model 750E

“Enclosed” 

Master Cylinder

Model 700 & 750

“Open”

Master Cylinder

1B

1

1

1 & 6

1

4

5

7

5

5

3

3

2

1

1

4

5

5

7

1

1 & 6

5

1B

1C

1B

1C

Model 750E/750/700 Replacement Parts List

Page 10

 Item #  Part #  Description

 1A 

70461K

 

Disc Brake Master Cylinder Kit 

“Open Model” with gasket,

   

 

Includes: master cylinder and cap, 4 mounting screws with washers,  

   

 

2 rollers with matching nuts and bolts

 1A 

70461KD

 

Drum Brake Master Cylinder Kit

 “Open Model” with gasket,

   

 

Includes: master cylinder and cap, 4 mounting screws with washers,  

   

 

2 rollers with matching nuts and bolts

 1A 

70519K

 

Disc Brake Master Cylinder Kit

 “Enclosed Model”

   

 

Includes: master cylinder and cap, 4 mounting screws with washers,  

   

 

2 rollers with matching nuts and bolts

 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 with Disc Brake Actuators

 1C 

70470-3

  Gasket - For “Open Model” master cylinders

 2 

70411

  Latch Kit Assembly, with Drop N Go Coupler,

   

 

(for serial numbers 17926 and below)

 2 

70412

  Latch Kit Assembly, with Drop N Go Coupler,

   

 

(for serial numbers 17927 and above)

 3 

50317

  Emergency Stop Cable (E-stop/Breakaway)

 4 

50301

  Safety Cable with stainless steel pin - Includes mounting screw

 5 

70462K

  Actuator Covers, Includes: front and rear cover plates and

   

 

4 mounting screws

 6 

48986A

  Master Cylinder Fill Cap

 with internal bladder, 2.25” Opening (E-Models)

 6 

70470-4 

  Master Cylinder Fill Cap

 with internal bladder, 1.25” Opening (Open Models)

 7 

48845

  Safety Spring with two mounting screws 

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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