Scotsman MAR 106, Service Manual

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5. Fit in place of it the screw of 4 MA supplied in
the kit then tighten its nut.
6. Gradually unloose the two remaining screws
and the nut till release the spring of seal
mechanism.
7. Unloose the last screw to remove the seal
mechanism ring as well as the seal
mechanism S.S. ring and its spring.
8. Withdraw entirely the stainless steel ring (6)
that houses the graphitic seal ring.
9. Check to see the surface conditions of
cylinder shaft journal. It is of extreme
importance that this surface be clean, smooth
and polished. In case of scored surface it is
necessary to stroke on it a very fine sand
paper stripe. Check to see that washer (5) be
properly clean and positioned with keyway to
match the key.
10. If necessary replace the 0 rings of the S.S.
ring that houses the graphitic ring.
11. Proceed attentively to examine the graphitic
sulface of the seal ring. If this surface is no
more perfect and optically flat, proceed to
replace the seal ring in the following way.
Lubricate the outer surface of the new seal
ring with compressor oil and place it at the
inferior of the housing ring.
12. Place on drum shaft the steel ring housing
the graphite.
13. Mount on drum shaft journal the remaining
portion of seal mechanism (S.S. ring and
spring) (9) then the seal mechanism ring (10).
14. Fit the screw of 4 MA with its nut in one of the
three threaded holes then screw down the
nut in order to compress the spring.
15. When the seal mechanism spring has been
partially compressed fit the other two screws
and full compress the spring by screwing
down gradually the three tightening point.
16. After have tightened the screws unloose the
tie rod screw and replace it with the third one.
17. Clean carefully the inner surface of refrigerant
manifold. Check to see the good condition of
the seal ring (8) and fit it in its seat inside the
refrigerant manifold. Fit on shaft end the
washer (12) which keeps in place the seal
ring (13) inside the refrigerant manifold and
fit inside the manifold the gasket.
18. Position the manifold on the six monting
studs, fit the six mounting nuts and washers
and tighten all them down by means of a 10
mm. wrench.
19. Connect the outlet refrigerant line to the
corresponding port of the manifold and tighten
it with the four head necessed screw.
20. Connect the refrigerant inlet line on its
manifold fitting and tighten the fitting flarenut.
9. REMOVAL AND REPLACEMENT OF
THE DRIVE MOTOR
A. To remove the drive motor assembly:
1) Remove screws and front, top and right side
panels.
2) Slid-off V belt from motor pulley.
3) Unloose and remove hex head screw
securing the pulley to motor shaft.
4) Disconnect wire leads to motor.
5) Remove two hex head bolts, lockwashers
and washer, and nut which attach the sleigh
support plate of motor to the side frame of
evaporator drum basin.
6) Lift the sleigh plate with the drive motor out of
the Chassis.
7) Unloose and remove 4 Nuts securing the
motor to the sleigh plate.
B. To replace the Drive Motor Assembly reverse
the removal procedure.