303GB5129AM | Yumak Single Cylinder Air Compressor For E7, ETEC

Cylinder diameter Ø85 mm
Volume 218 cm³
Working distance of the piston 56 mm
Port 0 Ø25 mm
Port 2 1/2" - 14 NPT
Port 4 1/8 x 27 NPTF
Port 8.1 Ø11.6 mm
Port 9.1 3/8" - 18 NPT
Port 9.2 3/8" - 18 NPT
Crankshaft thread 7/8" - 14 - 2A UNF
Number of cylinders 1
Cooling Water
ESS Characteristics Yes
Water cooled valve plate Yes
Direct control Yes
Maximum working pressure 10 bar

1. Produce compressed air

The compressor draws in air and compresses it to a higher pressure for use in different systems.

2. Supply air for vehicle systems (especially trucks)

In heavy trucks and buses, a single-cylinder air compressor provides air for:

• Air brakes

• Air suspension

• Air-operated accessories

3. Power air tools

Used to operate:

• Impact wrenches

• Nail guns

• Ratchets

• Small pneumatic tools

4. Inflate tires and equipment

Common for:

• Car tires

• Bicycle tires

• Air mattresses

• Sports equipment

5. Provide air for small industrial or workshop tasks

Supports light-duty air needs such as:

• Blowing dust

• Painting (small spray guns)

• Cleaning parts

1. Unusual noises

• Loud knocking, rattling, or grinding sounds may indicate worn pistons, bearings, or valves.

2. Reduced air pressure

• The compressor cannot reach its normal pressure or loses pressure quickly.

• Air tools or systems may work weakly or inconsistently.

3. Overheating

• The compressor becomes unusually hot during operation, indicating internal wear or insufficient lubrication.

4. Oil leaks

• Oil leaking from seals or around the cylinder may indicate worn gaskets or piston rings.

5. Excessive vibration

• The unit shakes more than normal due to imbalance or damaged components.

6. Air leaks

• Hissing sounds or inability to maintain pressure may indicate leaks in valves, fittings, or the cylinder itself.

7. Frequent tripping of safety valves

• Pressure relief valves may release air often if the compressor cannot maintain proper operation.

8. Failure to start or run consistently

• Motor or piston issues prevent the compressor from starting or running smoothly.