Harbor Freight Tools Air Compressor 47890 User Manual

HYDRAULIC SPRING  
COMPRESSOR SET  
Model 47890  
ASSEMBLY and OPERATING  
INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyright © 2002 by Harbor Freight Tools®. All rights reserved. No portion of this  
manual or any artwork contained herein may be reproduced in any shape or form  
without the express written consent of Harbor Freight Tools .  
For technical questions and replacement parts, please call 1-800-444-3353  
 
9.  
Maintain tools with care. Keep tools clean for better and safer performance. Follow  
instructions for lubricating and changing accessories. Inspect tool cords periodically and, if  
damaged, have them repaired by an authorized technician. The handle must be kept clean,  
dry, and free from oil and grease at all times.  
10. Stay alert. Watch what you are doing, use common sense. Do not operate any tool when you  
are tired.  
11. Check for damaged parts. Before using any tool, any part that appears damaged should be  
carefully checked to determine that it will operate properly and perform its intended function.  
Check for alignment and binding of moving parts; any broken parts or mounting fixtures; and  
any other condition that may affect proper operation. Any part that is damaged should be  
properly repaired or replaced by a qualified technician.  
12. Guard against electric shock. Prevent body contact with grounded surfaces such as pipes,  
radiators, ranges, and refrigerator enclosures.  
13. Replacement parts and accessories. When servicing, use only identical replacement parts.  
Use of any other parts will void the warranty. Only use accessories intended for use with this  
tool. Approved accessories are available from Harbor Freight Tools.  
14. Do not operate tool if under the influence of alcohol or drugs. Read warning labels on  
prescriptions to determine if your judgment or reflexes are impaired while taking drugs. If there  
is any doubt, do not operate the tool.  
15. Maintenance. For your safety, maintenance should be performed regularly by a qualified  
technician.  
16. Never leave a loaded spring unattended. Whenever a strut spring is compressed, a lot of  
force is stored in the spring. This must be controlled and monitored until the spring is relaxed.  
17. Keep hands and fingers away from the Spring Compressor when applying or releasing  
a load.  
18. Release a load from the Spring Compressor before performing any service or  
maintenance. Do not move the tool, service the pump, or clean a Strut Assembly while it’s  
under a load.  
19. Do not allow contact with lubricants. Make sure the Spring Compressor is clean and all  
lubricants are washed off prior to use. Lubricants will diminish it’s ability to hold the sping  
firmly and safely.  
Never exceed the maximum capacity of 1500 Lbs. Personal injury or property damage  
may result if you exceed the capacity of the Spring Compressor.  
20. Warning: De-grease the strut spring to be compressed. Never attempt to compress a  
dirty spring.  
21. Warning: The maximum force which can be applied by the Strut Spring Compressor is 1,500  
Lbs. Use the Strut Spring Compressor only on passenger cars and pickup trucks. Using the  
Struct Spring Compressor at a force greater than 1,500 lbs. may result in personal injury and/or  
property damage.  
22. Do not allow any lubricants to contact the Coil Brackets (#16) of the Hydraulic Spring  
Compressor. Lubricants of any type on the above mentioned parts will diminish the ability of the  
Hydraulic Spring Comporessor to firmly and safely grip and hold a Strut Spring in position, which  
may result in personal injury and/or property damage.  
Page 3  
SKU 47890  
 
Warning: This product contains or produces a chemical known to the State of Califor-  
nia to cause cancer and birth defects (or other reproductive harm). (California Health  
& Safety Code 25249.5 et seq.)  
Warning:The warnings, cautions, and instructions discussed in this instruction manual can-  
not cover all possible conditions and situations that may occur. It must be understood by the  
operator that common sense and caution are factors which cannot be built into this product,  
but must be supplied by the operator.  
Unpacking  
When unpacking, check to make sure the parts listed on pages 6 and 7 are included. If any  
parts are missing or broken, please call Harbor Freight Tools at the number on the cover of  
this manual as soon as possible.  
Assembly  
The only assembly required is the mounting of the large or small set of Coil  
Brackets (#16).  
Removing existing Coil Brackets (#16).  
1. On the Coil Bracket Base (#15), remove the existing Coil Brackets (#16) by removing  
the Bolt (#13), Lock Washer (#12), and Washer (#11). Repeat with other side.  
Adding a Coil Bracket (#16 ).  
2. Line up the holes on the Coil Bracket (#16) with the holes on the Coil Bracket  
Base (#15). Put a Lock Washer (#12), and a Washer (#11) on a Bolt (#13), and thread it  
through the Coil Bracket Base (#15), into the Coil Bracket (#16 ). Repeat with other side.  
Operation  
Refer to both Assembly Drawings on pages 8 and 9.  
Note: This product is to be used to remove a strut spring from a strut assembly previ-  
ously removed from a vehicle. For the purpose of this manual, it is assumed that this  
tool will be used to remove a strut spring from a generic type of strut assembly previ-  
ously removed from a vehicle. You must follow the directions in the vehicle manual (not  
included) specific to your strut assembly  
1. Attach the hose from the Hand Pump (#17) to the Cylinder Screw (#9) within the  
Connection Nut (#10).  
2. Tighten (clockwise) the Release Valve (#15a) on the Pump (#17).  
3. To move the Coil Brackets (#16) closer together slowly pump the Handle Grip (#38a).  
4. To adjust them away from each other, loosen (counterclockwise) the ReleaseValve (#15a)  
on the Pump (#17).  
Page 4  
SKU 47890  
 
Operation (continued)  
5. De-grease the spring to be compressed. Never attempt to compress a dirty spring as it  
may slip from the brackets causing injury or damage.  
6. Make sure you have the proper size Coil Brackets (#16) for the spring. If not, change  
them according to the assembly directions on page 4.  
7. Adjust the Coil Brackets (#16) according to the directions under Operation on page 4 so  
that the recessed lips (See Assembly Drawing 1) of the Coil Brackets (#16) fully contact the  
furthermost top and bottom spring coils within the strut assembly.  
Note: Make sure you tighten (clockwise) the Release Valve (#15a) on the Pump (#17).  
8. Check to make sure that the top and bottom of the vehicle’s spring coils are firmly in  
contact with the Coil Brackets (#16).  
9. Clear the area of all observers.  
10. Keep your hands clear of the spring.  
11. Slowly pump the Handle Grip (#38a) to compress the spring.  
Removing strut assembly from spring.  
12. After fully compressing the spring, remove the spring from the strut assembly by following  
the manual (not included) specific to your struts. Per the manual’s (not included) instructions,  
remove the appropriate hardware (Upper Spring Cap & Piston Rod Nut) that connects the  
spring to the strut assembly.  
13. Slowly release (counterclockwise) the Release Valve (#15a) on the pump to release the  
load on the Spring Compressor.  
14. If necessary (according to the strut manual) loosen nuts that hold spring to the strut  
assembly.  
15. The vehicle’s strut assembly may now be removed from the Spring Compressor.  
Reassembly  
16. Reassemble the strut assembly with the exception of the Spring Cap & Piston Rod Nut.  
17. Follow steps five through eleven above to compress the spring.  
18. Following the strut manual (not included), replace the strut assembly hardware into the  
spring, securing the Piston Rod Nut onto the Piston Rod, and replacing the Upper Spring  
Cap.  
19. Slowly release (counterclockwise) the Release Valve (#15a) on the pump to release the  
load on the Spring Compressor. Once the Coil Brackets (#16) are clear of the furthermost  
top and bottom spring coils, remove the tool.  
Maintenance  
To keep the pump working properly, air must be bled from the hydraulic system when  
performance begins to decline.  
1. Tighten (clockwise) the Release Valve (#15a) on the pump while the pump hose is still  
attached to the main assembly.  
2. Remove the Oil Fill Cap (See Assembly Drawing 2). Pump the Handle Grip (#38a) slowly  
to bleed air from the system. Repeat until no more air leaves the system.  
3. Add clean, high quality hydraulic oil if necessary and then replace the Oil Fill Cap . Loosen  
(counterclockwise) the Release Valve (#15a).  
4. Test the pump by tightening the Release Valve (#15a) and pumping the Handle  
Grip (#38a) ten times, making sure the Coil Brackets (#16) compress. If the pump is still not  
performing properly, repeat the bleeding procedure.  
Page 5  
SKU 47890  
 
PLEASE READTHE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS  
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-  
TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KINDTOTHE BUYERTHAT HE  
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS  
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER  
AND/OR DISTRIBUTOR EXPRESSLY STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS  
SHOULD BE UNDERTAKEN BY CERTIFIED 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 PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING  
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.  
NOTE: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
Parts List 1 (Main Assembly)  
Part No.  
1
Description  
Screw  
Qty.  
1
2
Spring  
2
3
Nut  
1
4
Bushing  
1
5
6
7
8
Sealing Ring  
Retaining Ring  
Piston Rod  
Cylinder  
1
1
1
1
9
Cylinder Screw  
Connection Nut  
Washer  
Lock Washer  
Bolt  
1
1
4
4
4
2
1
4
10  
11  
12  
13  
14  
15  
16  
17  
0-ring  
Coil Bracket Base  
Coil Bracket  
Hand Pump  
1
Page 6  
SKU 47890  
 
Parts List 2 (Pump)  
Part No.  
1a  
2a  
3a  
4a  
5a  
6a  
7a  
8a  
Description  
Valve Block  
Oil Filter  
0-ring  
Reservoir  
Tie Rod  
NylonRing  
Nut  
Ring  
Breather Valve  
Screw  
0-ring  
Pump Foot  
Ball  
0-ring  
Release Valve  
Hose  
Coupler  
Dustproof Cover  
Ball  
Ball Cap  
Spring  
Qty. Part No.  
Description  
Screw  
0-ring  
Screw  
Screw Cover  
Screw  
Nylon Ring  
Sealing Ring  
Screw  
0-ring  
Nylon Ring  
Piston  
Qty.  
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
1
2
1
1
1
1
1
3
1
2
1
1
1
1
1
1
1
1
22a  
23a  
24a  
25a  
26a  
27a  
28a  
29a  
30a  
31a  
32a  
33a  
34a  
35a  
36a  
37a  
38a  
39a  
40a  
41a  
42a  
9a  
10a  
11a  
12a  
13a  
14a  
15a  
16a  
17a  
18a  
19a  
20a  
21a  
Pin  
Retaining Ring  
Pin  
Handle Socket  
Handle  
Handle Grip  
Screw  
Screw  
1
1
1
1
Spring  
Ball  
Note: When ordering pump parts off of Parts List 2 (referring to Assembly Drawing 2 on page  
9), make sure you add the suffix “a” to the order number.  
Page 7  
SKU 47890  
 
Assembly Drawing 1  
Lip of Coil Bracket  
Page 8  
SKU 47890  
 
Assembly Drawing 2  
Note: When ordering pump parts off of Parts List 2 (referring to Assembly Drawing 2 on page  
9), make sure you add the suffix “a” to the order number.  
Oil Fill Plug  
Page 9  
REV 12/04  
SKU 47890  
 

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