FOR MODELS: JGW, JGR AND JGJ SECTION 5 - MAINTENANCE
PAGE 5 - 40 1/01
Ethylene Glycol Contamination
Ethylene glycol contamination of a compressor can result from water-cooled compressor rod
packing or oil cooler.
Ethylene glycol anti-freeze coolant mixture leaking into the compressor frame crankcase oil
can cause crankshaft seizure due to lack of adequate lubrication. Crankcase oil should be
changed as recommended in “Recommended Maintenance Intervals” on Page 6-1. Also,
crankcase oil should be routinely sampled and analyzed by a qualified laboratory to verify
suitability for continued use, including checking for ethylene glycol contamination.
Even small quantities of ethylene glycol in the oil can be detrimental. If contamination is less
than 5%, drain oil, replace filters and flush oil system with a 50-50 mixture of butoxyethanol
(Dow Chemical Company Dowanol EB or equivalent) and 10W oil using a motor driven
pump. Flushing should be done on a warm compressor. Bearings should be continuously
flushed for 1/2 hour while barring over compressor. All surfaces that come in contact with
crankcase oil are to be flushed, including spraying all interior surfaces in the crankcase.
Completely drain cleaning mixture, being sure to drain all components of the oil system.
Repeat flushing operation using a 60/40 mixture of 10W oil and kerosene or fuel oil. Com-
pletely drain the system, install new filters and fill the crankcase with proper oil. The source
of the coolant leak must be found and repaired.
If sampling indicates ethylene glycol contamination greater than 5% or if the compressor has
seized due to contamination, the unit must be disassembled, cleaned with 100% butoxyeth-
anol, flushed with kerosene or fuel oil and repaired as required. All surfaces that come in
contact with crankcase oil must be cleaned with butoxyethanol, including all passages and
piping, and then flushed with kerosene or fuel oil. Oil and filters must be changed. The
source of the coolant leak must be found and repaired.
Butoxyethanol presents health and safety hazards. Use proper eye and shin protection and
adequate ventilation. Do not use near open flame or sparks. See manufacturer’s Material
Safety Data Sheet for complete details.
Ethylene glycol, butoxyethanol, contaminated oils and solvents must be properly disposed.
A qualified chemical disposal service should be used.
Cleaning Non-Lube Compressor Cylinder Components
Complete non-lube cylinders ordered and shipped from Ariel are provided cleaned and pro-
tected to non-lube service requirements. Internal parts shipped loose, contaminated internal
surfaces and all repair parts are to be cleaned prior to installation, thus providing long life of
non-lube compressors and extending life of rings.
Clean the cylinder bore thoroughly with denatured alcohol until a clean, alcohol soaked,
white “Bounty” paper towel does not remove any more debris. This includes all surfaces of
the bore, counter bore, valve pockets, etc.... Do not use Never-Seize on the crank-end-head
steel gasket. If the cylinder in an O-ring seal, apply only a very light film of oil to the cylinder
seating surface to seal the O-ring.
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