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Question posted by Tbassgolf on May 3rd, 2021

Compressor Won't Build Pressure. I Replaced The Manifold. The Compressor Goes

compressor won't build pressure. I have replaced the manifold and it will only go to about 40 psi. It stays running but will not build pay. Does anyone have any ideas on what is wrong.

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Answer #1: Posted by techyagent on May 4th, 2021 1:00 PM

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Related Dewalt D55140 Manual Pages

Instruction Manual - Page 2

....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. CUT-OUT PRESSURE SCFM @ 100 PSI (689.5 kPa) 135 PSI (930 kPa) .07 FIG. 1 E B DC NOT A STEP A G F H 2 English D55140 Air Compressor A. Quick Connect F. Air Tank Drain Valve H. Pressure Regulator E. On/Off Switch B.

Instruction Manual - Page 3

...depending on how often you read the manual and pay attention to these chemicals are: • lead ...pressure switch to reduce the risk of of hose may result in property damage. • arsenic and chromium from chemically-treated lumber Your risk from compressor...An additional length of personal injury. When using such tools. Wash hands after handling. SAVE THESE INSTRUCTION DANGER:...

Instruction Manual - Page 4

...supply air for human consumption. To reduce the risk of fire, do not allow the compressor to operate unattended. • Never place objects against or on the label or safety data...ASPHYXIATION) WHAT CAN HAPPEN HOW TO PREVENT IT • The compressed air directly from the compressor should never be used in personal injury or property damage. Breathing these contaminant's can cause serious...

Instruction Manual - Page 5

... air tank. • Drain air tank daily or after each use compressor to repair a damaged or leaking air tank. Attachments & accessories: • Exceeding the pressure rating of a phone book or call 1-800-4-DEWALT for units with a new air tank or replace the entire compressor. • Modifications or attempted repairs to the air tank. •...

Instruction Manual - Page 6

...animals. • Always turn the compressor off and bleed pressure from the air hose and air tank before attempting maintenance, attaching tools or accessories. Compressor will remain hot for several minutes...ANSI Z87.1 eye protection (CAN/CSA Z94.3) with guards or covers which the compressor is connected provides proper electrical grounding, correct voltage and adequate fuse protection. See ...

Instruction Manual - Page 7

...; Any repairs required on a roof or other elevated position. others. • Become familiar with the operation and controls of the air compressor. • Keep operating area clear of the unit. Stay alert at all times. • Never defeat the safety features of this product. • Equip area of alcohol or drugs. SAVE...

Instruction Manual - Page 8

... automatically starts the motor when the air tank pressure drops below the factory set cut -out pressure, the check valve closes, allowing air pressure to remain inside the air tank. Turn regulator knob clockwise to increase pressure and counterclockwise to the tank pressure. COOLING SYSTEM This compressor contains an advanced design cooling system. English FEATURES ON...

Instruction Manual - Page 9

... • 16 gauge (AWG) or larger. (Wire size increases as the grounded plug. Ensure the outlet being used . 9 The compressor will snap into the Quick Connect body (E). Ensure regulated pressure gauge reads 0 PSI (0 kPa). 2. Grasp the hose at the Quick Connect plug and push the plug into place. 3. DISCONNECTING HOSES WARNING: Risk of...

Instruction Manual - Page 10

...other containers on a 15 amp circuit if the following conditions are run off the compressor must comply with petroleum-based products. Observe extension cord safety instructions ...if necessary. Damage can be operated on or near these openings. Compatibility TRANSPORTING Air tools...

Instruction Manual - Page 11

... inspect air hose, replace if needed. 8. Firmly grasp air hose in hand when installing or disconnecting to escape and prevent air pressure build up in the air...Run the compressor for air tools and accessories. The regulator outlet 2. connect. 2. Ensure the drain valve (H) is in instructions are not closely followed. Ensure regulated pressure gauge reads 0 PSI (0 kPa). 7. pressure...

Instruction Manual - Page 12

... lubricating oil and/or substances which may occur, causing air tank rupture or an explosion. Remove hose and accessory. Ensure air tank pressure gauge reads 0 PSI (0 kPa). Allow air compressor to make sure that are periodically replaced. NOTE: Take note of the positions and locations of parts during disassembly to cool down before starting...

Instruction Manual - Page 13

... can cause stains. 6. Grasp black lever on drain valve. 5. When air tank pressure gauge reads 10 PSI (275.1 kPa), rotate valve to faulty materials or workmanship. CAUTION: The use with this will repair, without charge, any accessory for a free replacement. For warranty repair information, call 1-800-4-DEWALT (1-800-433-9258) or visit our...

Instruction Manual - Page 14

... maintained; PSI: Pounds per minute. Cut-In Pressure: While the motor is off is used. Branch Circuit: The circuit carrying electricity from pressure higher than 3045 minutes in any given hour. 14 SCFM: Standard cubic feet per minute; However, to build. Duty Cycle: This air compressor pump is , the air compressor pump should not run , air pressure in pressure.

Instruction Manual - Page 15

... continuous air leak 13 Regulator will not shut off air outlet 13 Motor will not run ...14,15,16,17,18,19 CODE 1 2 3 Troubleshooting Codes POSSIBLE CAUSE POSSIBLE SOLUTION Pressure switch does not shut off motor when compressor Set the On/Off switch to OFF, if the unit does not shut reaches cut...

Instruction Manual - Page 16

... 7 Regulator is not adjusted correctly for accessory being used. WARNING: Risk of air 9 Compressor is not large enough for accessory 10 Hole in Regulator under flow conditions while accessory is...air usage. NOTE: Adjust the regulated pressure under Features if pressure drop is wrong length or gauge 16 POSSIBLE SOLUTION Air tank must be replaced. It is normal for proper gauge...

Instruction Manual - Page 17

... low voltage conditions and/or proper extension cord. 4. Check fuse box for proper fuse. Check for blown fuse and replace as necessary. Disconnect the other electrical appliances from circuit or operate the compressor on its own branch circuit. Contact a DEWALT factory service center or a DEWALT authorized service center. 1. English CODE POSSIBLE CAUSE...

Instruction Manual - Page 55

... lozenge-shaped humps on the surface of pyramids on the handgrip; DEWALT Industrial Tool Co., 701 Joppa Road, Baltimore, MD 21286 (AUG06) Form No. A18021 r1 D55140 Copyright © 2006 DEWALT The following are trademarks for one or more DEWALT power tools: the yellow and black color scheme; the "D" shaped air intake grill;

Parts Diagram - Page 2

...5140040-30 Parts List for current parts information. Please visit www.dewaltservicenet.com for D55140 Type 1 Description Qty Required TUBE PLUG 2 KIT ISOLATOR W/SCREW 4 SCREW .250... SAFETY 150 .25 1 No Longer Available 1 GAUGE 2 GAUGE 2 SCREW .250-20X.500 P 6 REGULATOR/MANIFOLD 1 HOSE 1 NUT 4 BALL VALVE 1 DECAL 1 DECAL 1 DECAL 1 LABEL 1 No Longer Available 1 WARNING ...

Parts Diagram - Page 3

Page 2 Parts list, pricing, and availability subject to change. 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. All ...