Dewalt D55140 Support Question

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Question posted by aunurhome on May 10th, 2023

Dewalt 1 Gallon Compressor

the compressor turns on builds pressure but then releases the air And then starts to build air pressure again but then releases air

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Answer #1: Posted by SonuKumar on May 10th, 2023 10:25 AM

SonuKumar

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If your DeWalt D55140 compressor is turning on and building pressure, but then releasing air and repeating the process, it could be a sign of a few possible issues. Here are some things to check:

Check the pressure switch: The pressure switch is responsible for turning the compressor on and off as needed to maintain the correct pressure. If the switch is not working properly, it could be causing the compressor to turn on and off repeatedly. Check the switch to see if it is functioning correctly, and if necessary, replace it.

Check the check valve: The check valve is responsible for preventing air from flowing back into the compressor when it is turned off. If the check valve is not working properly, it could be causing the compressor to release air and then restart. Check the check valve to see if it is functioning correctly, and if necessary, replace it.

Check the safety valve: The safety valve is designed to release air if the pressure in the tank becomes too high. If the safety valve is not functioning correctly, it could be causing the compressor to release air and then restart. Check the safety valve to see if it is functioning correctly, and if necessary, replace it.

Check the regulator: The regulator controls the pressure that is released from the compressor. If the regulator is not functioning correctly, it could be causing the compressor to release air and then restart. Check the regulator to see if it is functioning correctly, and if necessary, replace it.

If you are unsure about how to check or replace any of these parts, it is recommended to consult the DeWalt D55140's user manual or contact a professional for assistance.

Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.

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Sonu
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Related Dewalt D55140 Manual Pages

Instruction Manual - Page 2

... Type: Time delay Speciﬁcations MODEL D55140 WEIGHT HEIGHT 24 lbs. (11.79 kg) 11.75" (298.5 mm) WIDTH LENGTH 14.895" (377.8 mm) 18.5 (469.9 mm) AIR TANK CAPACITY (GALLONS) 1.0 (3.8 liters) APPROX CUT-IN PRESSURE 105 PSI (723.9 kPa) APPROX. Air Tank Pressure Gauge C. Safety Valve G. Pressure Regulator E. Quick Connect F. On/Off Switch B. English D55140 Air Compressor A.

Instruction Manual - Page 3

... THIS OR ANY DEWALT TOOL, CALL US TOLL FREE AT: 1-800-4-DEWALT (1-800-433-9258) • It is normal for each signal word. WARNING: This product contains chemicals, including lead, known to the State of severity for electrical contacts within the motor and pressure switch to spark. • Always operate the compressor in minor or...

Instruction Manual - Page 4

... TO PREVENT IT • The compressed air directly from your specific application. 4 The air stream may contain harmful vapors and poisons. • Work in an area with the product when it is operating. • Always turn off and unplug unit when not in conjunction with your compressor is not safe for breathing. Inline filters...

Instruction Manual - Page 5

... Section VIII, Div. 1 rules. WARNING: RISK OF ELECTRICAL SHOCK WHAT CAN HAPPEN • Your air compressor is powered by electricity. Like any modifications to the air tank or its attachments. All pressure vessels should be performed by a DEWALT factory service center or a DEWALT authorized service center in the government section of a phone book or call 1-800...

Instruction Manual - Page 6

...high speed, resulting in serious injury or death from the air hose and air tank before attempting maintenance, attaching tools or accessories. WARNING: RISK FROM MOVING PARTS WHAT CAN HAPPEN... particles, and small objects at other people or animals. • Always turn the compressor off and bleed pressure from electrocution. WARNING: RISK OF HOT SURFACES WHAT CAN HAPPEN HOW TO PREVENT...

Instruction Manual - Page 7

...performed by a DEWALT factory service center or a DEWALT authorized service center. English • Attempting to operate compressor with damaged or missing parts or attempting to repair compressor with missing, ...; Keep children away from the air compressor at all compressor could result in serious injury or death to the operator. • Always operate compressor in ous injury or death to...

Instruction Manual - Page 8

... (I) /OFF SWITCH (O) Place this fan to blow air through the vent holes in large amounts. PRESSURE SWITCH The pressure switch automatically starts the motor when the air tank pressure drops below the factory set cut -out pressure setting, the safety valve (G) will protect against high pres- Turn regulator knob clockwise to increase pressure and counterclockwise to remain inside the...

Instruction Manual - Page 9

...regulated pressure gauge reads 0 PSI (0 kPa). 2. Ensure regulated pressure gauge reads 0 PSI (0 kPa). 2. Grounding Instructions WARNING: Risk of shock by a qualified electrician. The portable air compressor is.... cian. • Repairs to release Quick Connect plug on hose. Extension Cords If an extension cord must be properly grounded. The compressor will snap into the Quick Connect ...

Instruction Manual - Page 10

...air compressors can occur to change the cord set. To reduce excessive noise, use only time delay fuses. Compatibility TRANSPORTING Air tools and accessories that a material is required. Keep the compressor..., an air line filter for proper cooling. Contact a DEWALT service center or call 1-800-4-DEWALT for information regarding acceptable noise levels in compressed air is not...

Instruction Manual - Page 11

...(Fig. 1) hazardous risk of unsafe operation. Follow Pre-Start Checklist under Features. pressure rating for Use. Move the On/Off switch to escape and prevent air pressure build up (Fig. 1) cut -out pressure and the motor will start. 5. This procedure is required before the air compressor is functioning properly, see Draining Air Tank under Maintenance. 6. Read the instructions for 15...

Instruction Manual - Page 12

... center or a DEWALT authorized service center. Ensure On/Off switch (A) is loud when draining. Ensure regulated pressure gauge reads 0 PSI (0 kPa). 3. Drain the air tank, see Draining Air Tank under Maintenance. If not drained, water will condense in this section should be kicked up into face. Allow the compressor to cool down before starting compressor, pull the...

Instruction Manual - Page 13

... of purchase. Full One Year Warranty DEWALT heavy duty industrial tools are available for a free replacement. FREE WARNING LABEL REPLACEMENT: If your tool, please contact DEWALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, call 1-800-4-DEWALT for purchase from air tank. from date of property damage. When air tank pressure gauge reads 10 PSI (275.1 kPa...

Instruction Manual - Page 14

... motor is off, air tank pressure drops when accessory is turned on and begins to a certain high pressure before the motor automatically shuts off is called cut -in pressure. Cut-Out Pressure: When an air compressor is used. The high pressure at which the motor shuts off , protecting your air compressor, it is , the air compressor pump should not run , air pressure in any given...

Instruction Manual - Page 15

... 1,2 Air leaks ...3 Air leaks in air tank or at air tank welds 4 Air leaks between head and valve plate 5 Air leaks from safety valve...6 Knocking Noise...6 Pressure reading on the regulated pressure gauge drops when an accessory is used 7 Compressor is not supplying enough air to OFF, if the unit does not shut reaches cut -out too high Contact a DEWALT factory...

Instruction Manual - Page 16

..., it will weaken. See Extension Cords under Features if pressure drop is excessive. Do not repair the leak. English CODE POSSIBLE CAUSE 4 Defective air tank 5 Leaking seals 6 Defective safety valve 7 Regulator is not adjusted correctly for accessory being used 8 Prolonged excessive use of air 9 Compressor is not large enough for accessory 10 Hole in...

Instruction Manual - Page 17

... for proper fuse. Contact a DEWALT factory service center or a DEWALT authorized service center. 1. Reset circuit breaker. Motor will start automatically when tank pressure drops below cut -in pressure of pressure switch. 17 Check for your particular branch circuit. 2. Disconnect the other electrical appliances from circuit or operate the compressor on its own branch circuit...

Instruction Manual - Page 55

and the array of the tool. A18021 r1 D55140 Copyright © 2006 DEWALT The following are trademarks for one or more DEWALT power tools: the yellow and black color scheme; the array of pyramids on the surface of lozenge-shaped humps on the handgrip; the kit box configuration; the "D" shaped air intake grill; DEWALT Industrial Tool Co., 701 Joppa...

Parts Diagram - Page 2

Parts list, pricing, and availability subject to change. Please visit www.dewaltservicenet.com for D55140 Type 1 Description Qty Required TUBE PLUG 2 KIT ISOLATOR W/SCREW 4 SCREW .250-20X.750 H 4 No Longer Available 4 PUMP 1 FITTING 90DEG ELBOW 1 CLAMP HOSE .250 ID H 2 HOSE ...

Parts Diagram - Page 3

... A19513 Parts List for current parts information. Parts list, pricing, and availability subject to change. All Rights Reserved. Page 2 Please visit www.dewaltservicenet.com for D55140 Type 1 Description Qty Required SCREWS 2 SCREWS 6 SHROUD RIGHT 1 SWITCH 1 FAN 1 CHECK VALVE 1 FUSE 1 PCB ASSY 1 CORDSET 1 BODY QC .250 IND .25 1 COPYRIGHT© 2005...