Invacare 3LX, Service Manual

Page: 36 / 72

36
PREVENTIVE MAINTENANCE
PROCEDURE 2
PROCEDURE 2 - PREVENTIVE MAINTENANCE (continued)
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Fan
14. Reinstall the fan onto the shaft in original orien-
tation.
Valve Plate
15. With the sleeve located and firmly seated on the
housing, replace the valve plate in the same
manner as it was (FIGURE 18).
NOTE: Make sure the top edge of the sleeve locates
in the O-ring groove in the bottom of the valve plate.
CAUTION
Make sure that the O-ring is NOT twisted when
seated in the groove of the bottom of the valve plate.
WARNING
DO NOT lubricate or use oil on any moving parts.
The compressor eccentric uses a precision
sealed bearing.
CAUTION
DO NOT crimp the piston cup when you replace the
sleeve. If the cup is crimped, it MUST be replaced.
11. With bearing side (FIGURE 18) of connecting rod/ec-
centric assembly facing the center (motor) of the com-
pressor, slide the assembly onto the shaft bringing it
flush to the motor bearing.
NOTE: Make sure the eccentric setscrew is positioned
over the flat of the shaft.
12. Tighten setscrew to 100 inch-lbs.
13. Hold the sleeve down by the housing with one (1) hand
and slowly rotate the eccentric with the other hand to
ensure all the components are lined-up properly.
Compressor Heads
16. Place the heads on top of the valve plates.
17. Tighten the head screws in a criss-cross pattern
to 40 inch-lbs.
Compressor
WARNING
To avoid personal injury or property damage,
rotate the fan by hand prior to connecting the
unit to a power source. Check for suction at the
air inlet by placing your finger over the port as
you rotate the fan. You should feel a slight suc-
tion with each rotation of the fan. If you don't
feel a suction but you feel or hear a thump as
you turn the fan, DO NOT connect the unit to a
power source. Review the assembly procedure
for possible error.
18. Reinstall compressor (Refer to PROCEDURE 7 -
REPLACING COMPRESSOR ASSEMBLY OR
CAPACITOR).
19. Run unit and check for leaks around compres-
sor hoses and compressor tubes (Refer to PRO-
CEDURE 19 - LEAK TEST).
20. Take pressure readings to ensure proper system pres-
sures (Refer to PROCEDURE 21 - SIEVE BED
PRESSURE TAP-IN KIT INSTALLATION AND BED
PRESSURE CHECK in the IRC3LX/IRC5LX/
IRC5LXO2 SERVICE MANUAL).
Connecting Rod/Eccentric Assembly
9. With gloved-hand or clean cloth, pre-form piston cup if
necessary.
10. Gently slide cylinder sleeve up and over cup to fully
form it.
NOTE: As the piston travels up and down it will
also rock from side-to-side. This is a feature of
the WOB-L Piston.
FIGURE 18 - CONNECTING ROD/ECCENTRIC
ASSEMBLY
Cylinder Sleeve
Retainer
Piston Cup
Rod Top