Does not start or stops at once: what to do?

Cause: Control panel fault, low voltage, thermal relay tripped. What to do: Repair, reset

Air receiver safety valve blows: what to do?

Cause: Unloader pressure switch, unloader valve or solenoid fault. What to do: Readjust, clean or replace

Separator safety valve blows (high oil pressure): what to do?

Cause: Clogged separator cartridge, minimum pressure valve fault. What to do: Replace cartridge, overhaul valve

Pressure does not rise (stays unloaded): what to do?

Cause: Pressure switch, solenoid or unloader seal ring fault. What to do: Readjust, clean or replace

Overheat trip: what to do?

Cause: Dirty cooler, low oil, fan stopped, blocked intake, thermo valve fault. What to do: Clean, top up, repair fan, clear intake, replace element

Oil flows back to suction filter at stop: what to do?

Cause: Unloader solenoid fault or stop delay relay wrong. What to do: Clean/replace valve, adjust off-delay timer

High oil content in air: what to do?

Cause: Clogged separator cartridge, blocked return line, overfilling. What to do: Replace cartridge, clean line, lower oil level

High vibration or noise: what to do?

Cause: Worn mounting rubbers, loose bolts, bearing damage. What to do: Replace rubbers, retighten, replace bearings

Tanabe TASK

Oil-injected rotary screw compressor, packaged

Tanabe TASK is a packaged, oil-injected rotary screw compressor (male and female rotors) in a soundproof box, used on board for service and working air. Oil cools, lubricates and seals the screw end; an oil separator element cleans the delivered air and an integrated aluminium oil cooler / after-cooler is cooled by a fan. Capacity control is by automatic unload, unload stop and automatic start/stop from a pressure switch and unloader solenoid valve. The manual gives safety warnings, construction, oil and filter replacement, cooler cleaning, V-belts, lay-up, the periodical check chart and a troubleshooting table.

Click a part on the model to see its number and purpose.Open the 3D trainer

Maintenance procedures

Oil and oil filter change

Stop the compressor, isolate power and check oil pressure reads 0 MPa. p. 27
Pressure inside can eject oil
Fit the short drain pipe to the separator oil outlet valve and drain the oil. p. 27
Unscrew the old filter cartridge with a wrench; grease the new packing thinly and fit by hand. p. 29
Fill fresh oil to the H line and run; check for leaks. p. 27

Suction filter cleaning

Remove the top board of the package, the butterfly nut and cover. p. 31
Pull out the element and blow it with air under 0.7 MPa from inside and outside. p. 31
Check for damage and refit with the wider flange downwards; replace every 2000 h. p. 31

Lay-up and restart

Before lay-up renew the oil, run about 1 hour, drain the separator, close the outlet valve, cover motor, panel and filter; cut power. p. 33
Before restart remove covers, check motor insulation is over 1 MΩ, drain the separator and start normally. p. 33

Maintenance intervals

Item	When	Action	Manual
Compressor oil	500 h first, then 2000 h	Replace with filter element	p. 27
Oil filter element	500 h first, then 2000 h	Replace; grease the new gasket thinly	p. 29
Suction filter element	500 h / 2000 h	Clean with air under 0.7 MPa / replace	p. 31
Oil cooler and after-cooler	1000 h (shorter in summer)	Blow clean from the back side	p. 32
V-belts	5000 h	Replace the whole set	p. 32
Oil level	daily	Check between H and L marks	p. 34

Faults and what to do

Does not start or stops at onceControl panel fault, low voltage, thermal relay tripped Air receiver safety valve blowsUnloader pressure switch, unloader valve or solenoid fault Separator safety valve blows (high oil pressure)Clogged separator cartridge, minimum pressure valve fault Pressure does not rise (stays unloaded)Pressure switch, solenoid or unloader seal ring fault Overheat tripDirty cooler, low oil, fan stopped, blocked intake, thermo valve fault Oil flows back to suction filter at stopUnloader solenoid fault or stop delay relay wrong High oil content in airClogged separator cartridge, blocked return line, overfilling High vibration or noiseWorn mounting rubbers, loose bolts, bearing damage

Technical specifications

Oil change	first at 500 h, then every 2000 h together with the oil filter	p. 27
Oil grade	ISO VG 46 turbine/hydraulic oils (e.g. Shell Comptella 46, Mobil Rarus SHC 924, Esso Nuto H 46)	p. 29
High air temperature trip	about 100 °C (thermo switch)	p. 32
Cooler cleaning air	0.7–1.0 MPa from the back side	p. 32
V-belts	3VX-530/560 (0.7 MPa) or 3VX-500/530 (1.0 MPa), 5 pcs, tensioned by motor weight	p. 33
Cooling fan rotation	clockwise seen from the motor side	p. 19
Insulation before restart	motor over 1 MΩ	p. 33

Source: manufacturer's manual “EM-20-3 INSTRUCTION MANUAL FOR AIR COMPRESSOR”, 39 pages. Page numbers refer to the original. Check against the manual on board before work.