Harbor Freight Tools Power Hammer 46935 User Manual

BREAKER HAMMER  
WITH PORTABLE CASE  
Model 46935  
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  
REV 04/03  
 
10. Maintain tools with care. Keep tools sharp and 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 handles must be  
kept clean, dry, and free from oil and grease at all times.  
11. Disconnect power. Unplug tool when not in use.  
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are  
removed from the tool or machine work surface before plugging it in.  
13. Avoid unintentional starting. Be sure the Switch Knob #87 is not depressed when not  
in use and before plugging in. Do not carry any tool with the switch depressed, whether  
it is plugged in or not.  
14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool when  
you are tired.  
15. Take caution as some woods contain preservatives such as copper chromium  
arsenate (CCA) which can be toxic.When cutting these materials extra care should be  
taken to avoid inhalation and minimize skin contact.  
16. 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. Do not use the tool if  
any switch does not turn On and Off properly.  
17. Guard against electric shock. Prevent body contact with grounded surfaces such as  
pipes, radiators, ranges, and refrigerator enclosures.  
18. 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.  
19. 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.  
20. People with pacemakers should consult their physician(s) before using this product.  
Electromagnetic fields in close proximity to a heart pacemaker could cause interference  
to or failure of the pacemaker.  
21. WARNING: Some dust created by power sanding, sawing, grinding, drilling, and  
other construction activities, contain chemicals known [to the State of California]  
to cause cancer, birth defects or other reproductive harm. Some examples of these  
chemicals are:  
- Lead from lead-based paints  
- Crystalline silica from bricks and cement or other masonry products  
- Arsenic and chromium from chemically treated lumber  
Your risk from these exposures varies, depending on how often you do this type of work.  
To reduce your exposure to these chemicals: work in a well ventilated area, and work  
with approved safety equipment, such as those dust masks that are specially designed  
to filter out microscopic particles.  
(California Health & Safety Code § 25249.5, et seq. )  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 3  
 
22. Maintenance. For your safety, maintenance should be performed by a qualified technician.  
23. Use proper size and type extension cord. If an extension cord is required, it must be of  
the proper size and type to supply the correct current to the tool without heating up.  
Otherwise, the extension cord could melt and catch fire, or cause electrical damage to  
the tool. See the chart below for appropriate extension cord size. Longer extension  
cords require larger size wire. If you are using the tool outdoors, use an extension cord  
rated for outdoor use (signified by “WA” on the jacket).  
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*  
(120 VOLT)  
NAMEPLATE  
AMPERES  
EXTENSION CORD LENGTH  
(At Full Load)  
25  
Feet  
18  
18  
18  
18  
16  
14  
12  
50  
Feet  
18  
18  
18  
16  
14  
12  
10  
75  
Feet  
18  
18  
16  
14  
12  
10  
-
100  
150  
Feet  
16  
14  
12  
12  
-
Feet  
18  
16  
14  
12  
10  
-
0 – 2.0  
2.1 – 3.4  
3.5 – 5.0  
5.1 – 7.0  
7.1 – 12.0  
12.1 – 16.0  
16.1 – 20.0  
-
-
-
* Based on limiting the line voltage drop  
to five volts at 150% of the rated amperes.  
Note: Performance of this tool (if powered by line voltage) may vary depending on  
variations in local line voltage. Extension cord usage may also affect tool performance.  
Warning:The warnings, cautions, and instructions discussed in this instruction manual  
cannot 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, make sure the parts listed on page 7 are included. If parts are missing or  
broken, call Harbor Freight at the number on the cover of this manual as soon as possible.  
Maintenance  
Warning!! Make sure the Breaker Hammer is unplugged before doing any maintenance.  
1.  
Wipe the tool with a lint free cloth after each use. Remove all dust and grit from the tool.  
2.  
Add a drop or two of a lightweight oil to the Switch assembly area to lubricate the  
Switch Knob (#87).  
3.  
Examine the tool before each use. Make sure the Chisel Bit is sharp and not dull or  
cracked. Replace worn or broken bits with approved replacement bits from Harbor  
Freight Tools.  
4.  
Store in temperatures no lower than 50-60° F.  
REV 11/06; 02/07  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 4  
 
Operation  
Installing a Chisel.  
Figure 1  
Chisels come with or without collars. Figure 1 shows  
installation of a chisel without a collar (the two included chisels  
are without a collar). Figure 2 shows installation of a chisel  
with a collar.  
Without a Collar:  
1.  
Pull the retaining ring to the side just far enough to allow  
the bit to be inserted, as shown in Figure 1.  
2.  
3.  
Insert the bit. Slide the chisel in as far as it will go.  
Pull the retaining ring down approximately 120° until it  
contacts the housing. Physically check that the chisel is  
secure before operating.  
Retaining  
Ring  
Note: If the Chisel Bit doesn’t slide in easily, apply some grease  
on the loading end of the Chisel Bit.  
With a Collar:  
1.  
Pull the retaining ring open about 30-40° to the second  
engaging position as shown in Figure 2.  
2.  
3.  
Insert the collared chisel.  
Return the retaining ring to close to its original position  
to lock the chisel in place. Physically check that the chisel  
is secure before operating.  
Figure 2  
Before each use, check the Chisel for cracks or other dam-  
age: Never use a damaged Chisel.  
Make sure you only use sharp tipped chisels.  
Retaini
Ring  
Dull tipped chisels can cause unnecessary  
chisel movement resulting in tool wear, and  
possible injury.  
REV 11/03; REV 06/04  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 5  
 
Operation (continued)  
Warning!! Always wear ANSI approved impact safety goggles. Wear a full face shield if you  
are producing metal filings or wood chips. Wear an ANSI approved dust mask or  
respirator when working around metal, wood, and chemical dusts and mists. Always  
wear ear protection. Ear protection is required for any other persons in the work  
area.  
Warning!! Be aware of flying concrete chips. Keep all spectators clear of the work area.  
Warning!! Do not operate this tool if you have back, neck, wrist, or other conditions or injuries  
that will be aggravated by the severe jerking forces that this tool exerts upon its  
operator.  
Warning!! If the Breaker Hammer ever gets out of your control, immediately release the Switch  
Knob (87).  
Note: Use the weight of the Breaker Hammer to help you break up concrete. Use the tool in  
the vertical position whenever possible. This tool was intended to break up larger pieces of  
concrete.  
IMPORTANT - READ BEFORE USE  
This Breaker Hammer may have decreased performance for a brief period at the beginning  
of each use. This warmup period lasts approximately 3-5 minutes. This happens because  
the grease inside the tool may be somewhat thick, preventing the tool from operating at full  
efficiency while the motor is cold. This is perfectly normal and does not indicate a problem.  
To help reduce this effect, we recommend storing this equipment in temperatures no lower  
than 50-60° F.  
Chipping a Straight Line  
1.  
Use chalk or another suitable writing material and mark you work surface to delineate  
the area you intend to hammer.  
2.  
3.  
Plug in the Breaker Hammer.  
Grasp the handles firmly with both hands. When you are sure that no people or animals  
are in the vicinity, and it’s safe to begin, depress the Switch Knob (#87).  
4.  
5.  
The Breaker Hammer will begin to break the top layer of concrete. If you push down, it  
will begin to break the next layer as well.  
Keep moving the Breaker Hammer along the line you want to section, breaking concrete  
as you go. If the Breaker Hammer jumps off of the line or section, release the Switch  
Knob (#87) and reposition the Breaker Hammer.  
6.  
When you are finished, release the Switch Knob (#87) and unplug the Breaker Hammer.  
Breaking up Concrete.  
1.  
2.  
Place the bit on the center of a piece of concrete.  
Grasp the handles firmly with both hands. When you are sure that no people or animals  
are in the vicinity, and it’s safe to begin, depress the Switch Knob (#87).  
3.  
4.  
As you break the concrete into big chunks, release the Switch Knob (#87)and move to  
other large pieces until all of the larger pieces are broken. Do not try to break up smaller  
pieces with this tool as it is too powerful and aggressive to control on small pieces.  
When you are finished, release the Switch Knob (#87) and unplug the Breaker Hammer.  
REV 12/04  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 6  
 
Parts List  
Part  
No.  
1
2
3
4
5**  
6
7
8**  
9
10  
11*  
12  
13  
14  
15  
16  
17  
18*  
19  
20  
21  
22**  
23  
24  
25  
26  
27  
28  
29  
30  
31  
Description  
Qty  
Part  
No.  
32**  
33  
34  
35**  
36  
37**  
38  
39  
40**  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
Description  
Qty  
Part  
No.  
63**  
64  
Description  
Qty  
Screw  
Cover  
4
1
1
1
1
1
1
1
1
4
1
1
1
1
2
1
1
1
1
2
1
1
1
2
9
2
1
2
1
1
1
Spring  
1
1
1
2
1
3
3
3
2
1
1
2
1
1
1
2
2
1
2
2
2
2
2
1
1
1
9
1
1
1
2
Rubber Seal  
Bearing  
Fixing Sheath  
1
1
1
Fixing Sheath  
Hammer Cylinder  
O-ring  
Clamp Base  
Spring  
Washer  
Nut  
Rubber Washer  
Pin  
Clamp Frame  
Roll Pin  
Shell  
Wire Protector  
Stator  
Stator Compressor  
Screw  
Rotor  
Wire Fixing Board  
Carbon Brush  
Screw  
Carbon Brush Holder  
Screw  
Wind Lead Ring  
Vane  
Tail Cover  
Screw  
Crankshaft Box  
Connecting Rod  
Fixing Ring  
Piston  
Spring Hammer  
O-ring  
Cylinder Box  
Screw  
Bearing  
Pin  
Felt Washer  
Bearing  
Axle  
Bearing Ass’y.  
Gear  
65  
67  
68*  
69**  
70**  
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
81  
82  
83  
84  
85  
86  
87  
88  
89  
90  
91  
Crankshaft  
Bearing  
Seal Washer  
Seal Cover  
Right-down Cover  
Screw  
Screw  
Right Balancing  
Nut  
Switch Box  
Switch  
Switch Sheath  
Screw  
Switch Box Cover  
Capacitor  
Terminal  
Cable Clip  
Screw  
1
2
1
1
1
4
4
1
2
1
1
1
2
1
1
1
1
2
1
1
1
1
1
4
2
1
4
Bearing  
Adjust Washer  
Snap Ring  
Gear  
Seal Spacer  
Gear Box  
Shock Absorber  
Screw  
Spline Ass’y.  
Spline Axle  
Nut  
Left Balancing  
Fixing Sheath Washer  
Fixing Sheath  
51  
52  
53  
54  
55  
56  
57  
58  
Cable  
Switch Knob Base  
Switch Knob  
Roll Pin  
Right Handle  
Screw  
Nut  
Left Handle  
Screw  
59*  
60  
61  
Bearing  
Nut  
Rear Cover  
Washer  
92  
93  
62  
94*  
95**  
Bearing Kit  
Seal Kit  
Parts with one or two asterisks are not available individually. You must purchase the  
parts kits.  
#94* - Bearing Kit includes part numbers 11*, 18*, 59*, 68*.  
#95** - Seal Kit includes part numbers 5**, 8**, 22**, 32**, 35**, 37**, 40**, 63**, 69**,  
70**  
NOTE: Some parts are listed and shown for illustration purposes only and  
are not available individually as replacement parts.  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM INTHIS MANUAL  
AS A REFERENCETOOL ONLY. NEITHERTHE MANUFACTURER NOR DISTRIBUTOR MAKES ANY REP-  
RESENTATION ORWARRANTY OF ANY KINDTOTHE BUYERTHAT HE OR SHE IS QUALIFIEDTO MAKE  
ANY REPAIRSTO THE PRODUCT ORTHAT HE OR SHE IS QUALIFIEDTO REPLACE ANY PARTS OFTHE  
PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL RE-  
PAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECH-  
NICIANS 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 PARTSTHERETO.  
REV 06/04; 02/05  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 7  
 
Assembly Drawing  
SKU 46935  
For technical questions, please call, 1-800-444-3353.  
Page 8  
 

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