Ingersoll Rand VTR20 Manual Del Usuario página 18

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PROCEDURES
MAINTENANCE
Before performing any maintenance function, switch main disconnect switch to "off" position
to assure no power is entering unit. "Lock Out" or "Tag Out" all sources of power. Be sure all
air pressure is relieved. Failure to do this may result in injury or equipment damage.
REPLACEMENT OF COMPRESSOR & GUIDE RINGS – The procedure for disassembly and
reassembly is as follows:
1. Remove cabinet panels and tubing to head.
2. Remove capscrews holding cylinder to crankcase.
3. Carefully pull the cylinder/head assembly straight away from the crankcase. Removing the
cylinder/head will expose the piston.
4. Remove the compression rings, guide rings, and O-rings (See Figure 1-6)
5. Clean piston and ring grooves thoroughly with a clean lint-free cloth and install new
compression rings. The compression rings are not taper faced so there is no top position
(See B1418). Position the rings so that joints are staggered around the piston.
6. Install O-rings in the grooves provided at the top end of each guide ring.
7. Install guide rings and position so that joints are staggered and O-rings are visible.
8. Wipe out cylinder bore surface with a clean, lint-free cloth.
9. Carefully reinstall cylinder/head assembly over piston and rings. The cylinder should slide
freely over rings. Make certain guide rings are not compressed over O-rings. If resistance is
encountered, "twist" guide ring to properly position on piston.
10. Reinstall cap screws and retighten cylinder to crankcase.
11. Reinstall tubing to head and cabinet panels.
REPLACEMENT OF PISTON AND DRIVING SET – Every 10,000 hours of run time, as indicated
by the hourmeter, the piston set and driving set must be replaced. The pump must be returned to
the factory for this replacement. Exchange rebuilt pumps are available. Contact factory.
REPLACE OF CRANKSHAFT BEARINGS – Every 20,000 hours of run time, as indicated by the
hourmeter, the crankshaft bearings must be replaced. The pump must be returned to the factory
for this replacement. Exchange rebuilt pumps are available. Contact factory.
TORQUE CHART
FOR COMPRESSOR FASTENERS
All Manifolds
Connecting Rod Bolts, Cylinder
to Crankcase Bolts,
Counterweight Bolt, Crankcase
End Cover Bolts
Cylinder Head Nuts
Fan Hub Bolt P05390A *
Acorn Nuts
* Apply Loctite 242 to threads.
24 FT – LB.
50 FT. – LB.
50 FT. – LB.
50 FT. – LB.
300 IN. - LB.
IF3163 Rev A Page 18
B1418-A

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