3JR70 (Type 1) DeVilbiss Compressor - Overview

Diagrams for 3JR70

See every part. Know exactly what you need.

Enter a part description. DIY Heroes keep it simple, eg. "belt" or "pump".

Search filter:
Clear Filter
Your search term must have 3 or more characters.
Tube Outlet 2.5G UMC – Part Number: DAC-269
No Longer Available
Tube Outlet 2.5G UMC
Part #DAC-269
Connecting Rod Assembly – Part Number: N036518
$77.89
In Stock
Connecting Rod Assembly
Part #N036518
This genuine OEM replacement kit is designed for use with select air compressors and includes essential components to restore proper function. The kit comes with a piston rod, compression ring, cylinder sleeve, and bearing—ideal for repairing worn or damaged internal parts. Please note that this kit does not include the valve plate, head gaskets, or any other compressor components, so be sure to check your model’s requirements before beginning repairs. Installation requires basic tools: a screwdriver, hex key Allen wrench), and pliers. With these tools and a bit of care, you can perform a straightforward repair that helps extend the life and efficiency of your compressor.
Brush Pair Kit – Part Number: 5140209-03
$21.96
Special Order
Brush Pair Kit
Part #5140209-03
Genuine Porter Cable replacement part Includes 2 Carbon Brushes, with wire lead. • Worn brushes frequently are the cause behind a motor running poorly. • Replacing brushes can fix a motor that's operating intermittently. • New brushes can restore a motor's electric braking. Carbon brushes are one of the most commonly replaced power tool parts. This is because carbon brushes are wear items, meaning that through friction and use they will gradually wear away until they need replacing. Worn brushes are a common causes of intermittent motor function, reduced electric braking and reduced motor power. A worn-out brush will often be worn down near to the wire lead and can be cracked, pitted, or burned. When replacing carbon brushes, be sure to inspect your armature for burns, cracks, or other damage which can indicate larger motor problems. rnrn1.5" X .25" X .5"
Valve – Part Number: D20114
$16.74
Special Order
Valve
Part #D20114
This safety valve is a genuine replacement part manufactured for use with air compressors. If the compressor's pressure switch malfunctions, and does not turn the motor off when the amount of pressure is met, the safety valve will open to release the extra air pressure. The amount of pressure required to open the safety valve is set by tension of the spring inside the valve. The spring can wear out, and leave the valve open at a lower pressure than what is set to turn the switch off, and will not allow pressure to build inside the tank. This safety valve has a thread sealant pre-applied, so additional thread sealant is not required, the safety valve is sold individually.
SCREW – Part Number: A19123
$7.44
Special Order
SCREW
Part #A19123
BELT TIMING – Part Number: AC-0815
$47.91
Special Order
BELT TIMING
Part #AC-0815
This is an OEM part sourced directly from the manufacturer. The belt is commonly found in Craftsman air compressors. This part is made of flexible rubber, and is used to transfer power between the piston and the pump assembly. Over time, it may become cracked and brittle, requiring replacement. You may need an Allen wrench or hex key when replacing this part. This item is sold individually.
Screw .250-20x.750 H – Part Number: 91895680
$8.29
Special Order
Screw .250-20x.750 H
Part #91895680
This replacement screw is a genuine OEM sourced item commonly utilized on air compressors and pressure washers. It is a standard hardware which has multiple applications depending on the unit. Please make sure to check diagrams of your model for the correct location and used of this screw. This part is made from durable metal and it is sold individually. You will need a wrench to install or remove this hardware.
CLAMP HOSE .250 ID – Part Number: CAC-1206-1
$7.44
In Stock
CLAMP HOSE .250 ID
Part #CAC-1206-1
This replacement hose clamp is designed for use in various compressor models and serves an important role in securing hoses to specific parts of the unit. Whether you're performing maintenance or replacing worn components, this clamp helps ensure a tight, leak-free connection. Made from durable metal and sold individually, it’s easy to install and built to withstand the pressure and vibration common in compressor operation. If your hose feels loose or you're noticing air leaks, replacing the clamp can help restore proper function and keep your compressor running smoothly.
NIPPLE CLOSE 1/4-18 – Part Number: AB-9050628
$7.44
Special Order
NIPPLE CLOSE 1/4-18
Part #AB-9050628
This is a genuine OEM part. The Porter Cable nipple (1/4-18NPT X 1) is constructed of high-quality metal, and is compatible with many air compressors. This part secures the manifold to the compressor tank. An adjustable wrench set is helpful in making the repair. This part is sold individually.
VALVE PLATE ASSY – Part Number: N017592SV
$32.06
Special Order
VALVE PLATE ASSY
Part #N017592SV
Genuine Porter Cable replacement part, this item is sold individually. Head Gasket Sold Separately. This part is used in the all of the compressors models listed below. When air is pumped by the piston it passes through the Valve Plate into the compressor tank. There are reeds on the valve plate that will eventually wear out, and the Valve plate will need to be replace. It is advisable at this time to replace the Graphite Gasket Kit, part number D30139.
Cylinder Kit – Part Number: N036517
$68.91
Special Order
Cylinder Kit
Part #N036517
This is an Original Manufacturer Approved replacement part used on some Air Compressors. This Kit Includes: Cylinder Sleeve, Compression Ring, Piston Rod Cap Screw. This is the is a hollow, round cavity or chamber with smooth walls that houses the Piston.
SCREW #10-24X.563 PA – Part Number: D21127
$7.44
Special Order
SCREW #10-24X.563 PA
Part #D21127

Common Symptoms of the 3JR70

How this model fails, and the parts that fix it.

See how others fixed this model. Time, tools, difficulty, and steps that lead to victory! View More

Search repair tips from other customers using simple keywords like "replace", "fit", "remove", "inspect". DIY doesn't mean you have to do it alone!

Search filter:
Clear Filter
Your search term must have 3 or more characters.
Worn piston rod and sleeve
7 of 12 people found this instruction helpful.
  • Donald from BRYAN, TX
  • Really Easy
  • 30 - 60 mins
  • Nutdriver, Screw drivers
Disassemble plastic housing around compressor unit using appropriate tools. Remove the four bolts from the compressor head using a 5/16 nut driver. Carefully remove head assembly including airline. Remove bolt through rod bearing with Allen wrench.

Reassemble with new rod and piston assembly. Best to use blue locktite on bolt through rod bearing when reassembling. Make sure to torque all bolts to specs listed.
Was this helpful?
Thank you for voting!
The compressor was getting air
4 of 8 people found this instruction helpful.
  • Linda from CARO, MI
  • Really Easy
  • 30 - 60 mins
  • Screw drivers, Socket set, Wrench set
Put the seal in and it ran like a champ. No vacuum leak and it now runs again!
Was this helpful?
Thank you for voting!