Heavy Duty Balanced Opposed Compressors - Ariel Corporation

FOR MODELS: JGZ AND JGU SECTION 6 - MAINTENANCE INTERVALS & TROUBLE SHOOTING
sis. See the Ariel Packager’s Standards or Technical Manual Lube Section for a
listing of what an oil analysis should provide. If the oil analysis results indicate,
change oil. If an oil analysis indicates lead, tin or copper particles in the oil,
check main, connecting rod and crankshaft-thrust bearing clearances. If bearing
clearances are outside of the limits, replace the affected bearings. See the Ariel
Technical Manual for instructions and clearance tolerances.
Every 6 Months or 4000 Hours (plus Daily/Monthly)
1. Drain and replace lubricator box oil.
2. Change oil filter or when oil filter differential pressure exceeds the filter change
value, see filter information plate on the top cover or Ariel Technical Manual,
Lube Section for value.
3. Change oil. A more frequent oil change interval may be required if operating in
an extremely dirty environment or if the oil supplier recommends it or if an oil
analysis dictates it. A less frequent oil change interval may be allowed if the oil is
replenished on a regular basis due to force feed lubricator usage.
4. Clean sintered element in the small oil filter supplied on the force feed lubrication
system or every time main oil filter is changed.
5. Clean strainer when oil is changed.
6. Open frame when oil is changed and visually inspect for foreign material. Disassembly
is not recommended unless a reason for it is found.
7. Check fluid level in torsional vibration damper (if applicable). Take fluid sample
for viscosity testing.
8. Re-tighten hold down stud-nuts to proper torque values. Inspect for frame twist
or bending to be sure the main bearing bores are in alignment. Check frame top
cover mounting surface flatness tolerance and/or soft foot (reference Ariel document
ER-82 or Technical Manual Section 2). For soft foot check, more than
0.002 inch (0.05 mm) pull down requires re-shimming.
9. Realign if necessary to hold coupling hub face and rim hot alignment within
0.005 inch (0.13 mm) TIR, except for hub O.D. >17 in. (>43 cm) angular face
limit is increased to 0°1’ (0.0167°).
10. Check cylinders for the proper lubrication rates. Reference Ariel Technical Manual,
Lube Section for a practical indication using the paper test method.
Yearly or 8000 Hours (plus Daily/Monthly/6 Months)
1. Check main, connecting rod, and crankshaft-thrust bearing clearances with a
pry bar and dial indicator. See the Ariel Technical Manual for instructions and
clearance tolerances. Any time bearing clearances are outside the limits,
replace the affected bearings. Disassembly to check clearances is not recommended.
Disassembly should be performed if the pry bar check indicates excessive
clearance.
2. Check crosshead guide clearance with feelers and if outside the limits listed in
the Ariel Technical Manual, Clearances Table, replace the affected parts.
3. Inspect valves for broken plates and loose center bolts, replace broken parts
and tighten center bolts. Reference Ariel Technical Manual, Fastener Torque
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