F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
5 - M
AINTENANCE
PAGE 5-47
take into consideration the resulting bore diameters, geometry, surface hard-
ness and finish. Contact Ariel for the applicable dimensions and tolerance limits
to help determine inspection limits when restoring cylinder bores and to ensure
a mechanically sound product.
Ethylene Glycol Contamination
Ethylene glycol contamination of a compressor can result from water-cooled compressor rod
packing or oil cooler leaks.
Ethylene glycol anti-freeze coolant mixture leaking into the compressor crankcase oil can
cause crankshaft seizure due to lack of adequate lubrication. Crankcase oil should be
changed as recommended in Section 6, while being 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 percent, drain oil, replace filters and flush oil system with a 50/50 mixture of
butoxyethanol (Dow Chemical Co. Dowanol EB or equal) 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 crankshaft. All surfaces that come in contact with
crankcase oil are to be flushed which includes 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.
Completely drain system, install new filters and fill crankcase and filters with the proper oil.
The coolant leak is to be found and repaired.
If sampling indicates that glycol contamination is greater than 5 percent or the compressor
has seized due to contamination, the unit is to be torn down, cleaned with 100 percent
butoxyethanol, flushed with kerosene or fuel oil and repaired as required. All surfaces that
come in contact with the 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. Coolant leak is to be found and repaired.
Butoxyethanol presents health and safety hazards. Use proper eye and skin 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 chemical disposal service should be used.
