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SKU 99780-81 

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

Page 13

limited 1 Year / 90 daY WarrantY

Harbor Freight Tools Co. makes every effort to assure that its products meet high qual-

ity and durability standards, and warrants to the original purchaser that for a period of one year 

from date of purchase that the tank is free of defects in materials and workmanship (90 days 

if used by a professional contractor or if used as rental equipment).  Harbor Freight Tools also 

warrants to the original purchaser, for a period of ninety days from date of purchase, that all 

other parts and components of the product are free from defects in materials and workmanship.  

This warranty does not apply to damage due directly or indirectly to misuse, abuse, negligence 

or accidents, repairs or alterations outside our facilities, normal wear and tear, or to lack of 

maintenance. We shall in no event be liable for death, injuries to persons or property, or for inci-

dental, contingent, special or consequential damages arising from the use of our product. Some 

states do not allow the exclusion or limitation of incidental or consequential damages, so the 

above limitation of exclusion may not apply to you.  

ThIs WARRANTy Is ExPREssLy IN LIEU 

of ALL oThER WARRANTIEs, ExPREss oR IMPLIED, INCLUDINg ThE WARRANTIEs of 

MERChANTAbILITy AND fITNEss.

To take advantage of this warranty, the product or part must be returned to us with trans-

portation charges prepaid. Proof of purchase date and an explanation of the complaint must 

accompany the merchandise. If our inspection verifies the defect, we will either repair or replace 

the product at our election or we may elect to refund the purchase price if we cannot readily and 

quickly provide you with a replacement. We will return repaired products at our expense, but if 

we determine there is no defect, or that the defect resulted from causes not within the scope of 

our warranty, then you must bear the cost of returning the product.

This warranty gives you specific legal rights and you may also have other rights which vary 

from state to state.

3491 Mission Oaks Blvd.  •  PO Box 6009  •  Camarillo, CA 93011  •  (800) 444-3353

troubleshooting

problem

possible causes

likely solutions

Overheating

Poor ventilation. 

1. 

Dirty cooling surfaces.

2. 

Compressor undersized for 

3. 

application.

Move the compressor to an area with better 

1. 

air circulation.
Clean compressor.

2. 

Check air requirements of tools.

3. 

Compressor 

operates, but with 

low air output

Valve or regulator loose or 

1. 

leaking.
Valve or regulator damaged. 

2. 

Air tank not pressurized yet.

3. 

Repair leaks. 

1. 

Have valve or regulator repaired by a 

2. 

qualified technician.

Allow pressure to build.

3. 

Incorrect pressure 

gauge reading

Pressure gauge worn or 

1. 

damaged.

have pressure gauge replaced by a qualified 

1. 

technician.

 Follow all safety precautions whenever diagnosing or servicing the 

tool.  disconnect air supply before service.

Summary of Contents for 99780

Page 1: ...ghts 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 Diagrams within this manual m...

Page 2: ...indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE is used to address practices not related to personal injury CAUTION without the safety alert symbo...

Page 3: ...urce or moving the tool Do not overreach Keep proper d footing and balance at all times This enables better control of the tool in unexpected situations Dress properly Do not wear loose e clothing or...

Page 4: ...o reduce the risk of electric shock do not expose to rain Store indoors Do not use to supply breathing air 4 Do not direct air flow from the Com 5 pressor at people or animals Industrial applications...

Page 5: ...ncer and birth defects or other reproductive harm Wash hands after handling Califor nia Health Safety Code 25249 5 et seq The warnings precautions and in 15 structions discussed in this instruction ma...

Page 6: ...rds Association Underwriters Laboratories Inc V Volts Alternating Current A Amperes n0 xxxx min No Load Revolutions per Minute RPM Specifications Electrical Requirements 120 V 60 Hz 9 3 A Air Hose Con...

Page 7: ...3 bottom of the Air Tank 30 Secure using four Knobs 29 See Figure 1 To connect the Wheels 38 first put 4 a washer 35 at the end of each Axle 34 See Figure 2 Put the Axles 34 in the wheel brack 5 ets...

Page 8: ...ns Read the entire Important Safety Information section at the beginning of this manual including all text under subheadings therein before set up or use of this product To prevent serious injury from...

Page 9: ...reaker will trip and it will shut off If this happens move the Power Switch to the OFF a position wait until the Compressor cools b down push the Circuit Breaker button c turn Power Switch back to the...

Page 10: ...condition that may affect its safe operation After Use 2 clean external surfaces of the tool with clean cloth 3 WARNING If the supply cord of this power tool is damaged it must be replaced only by a...

Page 11: ...0 Washer 3 11 Bolt 3 12 Washer 3 13 Bracket Washer 3 14 Regulator 1 15 Screw ST4x18 4 16 Screw ST4x20 2 17 Cord Retainer 1 18 Rear Handle 1 19 Connector 1 20 Valve 1 Parts List Part Description Qty 21...

Page 12: ...Page 12 ASSEMBLY DIAGRAM Record Product s Serial Number Here Note If product has no serial number record month and year of purchase instead Note Some parts are listed and shown for illustration purpos...

Page 13: ...of this warranty the product or part must be returned to us with trans portation charges prepaid Proof of purchase date and an explanation of the complaint must accompany the merchandise If our inspec...

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