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SKU 99780-81 

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

Page 9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Allow the Air Compressor to build up 

7. 

pressure until it cycles off.
Adjust the air compressor’s Output 

8. 

Regulator so that the air output is 

enough to properly power the tool, 

but the output will not exceed the 

tool’s maximum air pressure at any 

time.  Turn the knob clockwise to 

increase pressure and counter-clock-

wise to decrease pressure.  Adjust 

the pressure gradually, while check-

ing the air output gauge to set the 

right pressure range.
The Air Compressor will cycle up to 

9. 

155 PSI before shutting off.  It will 

start to build pressure again when the 

PSI of the Compressor drops to 125 

PSI.
If the Compressor becomes too hot 

10. 

the circuit breaker 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 ON 

d. 

position and resume operation.

After the job is complete, move the 

11. 

Power Switch to the OFF position.
Pull up on the Safety Valve to release 

12. 

pressure in the tank.  Squeeze the 

Trigger of the air tool to release pres-

sure from the line
Turn the Drain Valve at the bottom 

13. 

of the Tank two turns to release any 

built-up moisture.  Close the valve 

after moisture has drained out.  Do 

not remove the Drain Valve.

drain Valve

14.  Disconnect the air hose and tool.

To prevent accidents, disconnect its 

15. 

power supply after use.  Clean, then 

store the tool indoors out of children’s 

reach.

REV 10a

psi gauge of  

compressor

safety  

Valve

power  

switch

circuit  

Breaker

Output  

regulator

psi gauge  

for tool

air 

Outlet 

connection

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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