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SKU 43753 

For technical questions, please call 1-800-444-3353. 

Page 5

The 

Safety Block (#19) 

will keep the claws from springing open and causing 

injury.
Position the top hooks over the strut springs and tighten the 

6. 

Adjustment Screw 

(#6)

 so that the lower hooks will fit over the spring.  See Figure 2.

Make sure the same number of coils are between the hooks on each of the spring. 

7. 

Make sure the hooks are securely fastened and sit in line with the center axis of 

the spring (see Figure1).

8.  Turn the 

Adjustment Screw (#6)

 by using a wrench on the Hex Nut (see assem-

bly diagram on page 8) clockwise to compress the strut spring. Also hold the 

Screw Adjustment Nuts (#15)

 with another wrench while 

adjusting.  
Remove the strut rod nut, mounting plate, and spring seat.

9. 

Carefully remove the spring with the strut spring compressor still 

10. 

attached.
Repair or replace the strut (See service manual).

11. 

Set the spring over the repaired or new strut and re-install the rod 

12. 

nut, mounting plate, and spring seat.
Loosen the strut spring compressor and remove it.

13. 

Remove the strut from the strut vise.

14. 

Note:

 Remember, if the spring doesn’t compress evenly, loosen and reposi-

tion.

Note:

 Only compress the spring enough to remove the drive nut.

Warning!

 Do not allow contact between spring coils.

Warning!

 Make sure the arms of the Strut Spring Compressor do not contact 

each other.

Warning!

 Do not overtighten.

Replacing a MacPherson Cartridge on a Vehicle

Open the Spring Compressor approximately 8 inches.  

1. 

Position it with the Hex 

Nut facing down. 

As discussed on page 5, before clamping the spring, slip the 

Safety Block (#19) 

over the

 Hook (#5)

 and 

Hook (#7)

 as a safety precaution 

should the strut break loose. The 

Safety Block (#19) 

will keep the claws from 

springing open and causing injury.
First, position the top hooks over the strut spring. 

2. 

Use the 

3. 

Adjustment Screw (#6

) to tighten the unit so the lower hooks fit over the 

spring. 

Figure 2

Low Hook

Summary of Contents for 43753

Page 1: ...can result in serious injury Save this manual Copyright 2000 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or fo...

Page 2: ...n assistant can bring help Keep work area clean 2 Cluttered areas invite injuries Observe work area conditions 3 Don t expose to rain Keep work area well lit Keep children away 4 Children must never b...

Page 3: ...rmed regularly by a qualified technician Capacity 15 Never exceed the recommended capacity springs up to 7 in diameter Only use this tool with MacPherson Struts Never use with high pitched struts Use...

Page 4: ...sure to put the struts in a MacPherson Strut Vise prior to using the Strut Spring Compressor Warning Only use hand tools with the Strut Spring Compressor Never use any air electric or impact tools wit...

Page 5: ...t See service manual 11 Set the spring over the repaired or new strut and re install the rod 12 nut mounting plate and spring seat Loosen the strut spring compressor and remove it 13 Remove the strut...

Page 6: ...wrench while adjusting Repair the cartridge Release and remove the Strut Spring Compressor 6 Note Only compress the spring enough to remove the drive nut Note Remember if the spring doesn t compress...

Page 7: ...AIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTI FIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL...

Page 8: ...SKU 43753 For technical questions please call 1 800 444 3353 Page 8 Assembly Diagram Hex Nut REV 01e...

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