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Service manual - SMC/TSMC 100 Mk4
4. Technical Description
Fig. 4.11
SMC 112 - 116 and TSMC 116
Fig. 4.12
Oil pressure regulating valve
Pos. 22
49A
Pointed screw
04 technical description.fm
The oil suction strainer pos. 33A prevents dirt
particles in the oil of the crankcase from entering
the oil pump with a subsequent wear on the pump
bearings. The filter is of the full flow filter type.
The filter can be cleaned.
The oil pump, pos. 11A, Fig. 4.14, is built into the
compressor and driven by the crankshaft by
means of a coupling. The oil pump is a self-priming gear pump which takes the oil from the oil
sump through an oil suction strainer in the crankcase, pos 33A, Fig. 4.13 and forces it through the
full flow filter into the lubricating system.
The oil pressure regulating valve, pos. 22,
Fig. 4.12 regulates the oil pressure in the compressor lubricating system. It can be adjusted
from the outside by means of a screw driver when
the pointed screw, which locks the regulating
screw, has been loosened. For variable speed
driven compressors, the oil pressure has to be adjusted to the minimum oil pressure at minimum
speed. Due to rising pressure drop at high oil flow,
the pressure will rise when running at maximum
rpm.
0178 - 933 - ENG
Rev. 2005.12.09.
Fig. 4.13
Oil suction strainer
Pos. 33A
External oil filter, pos. 9A. After the oil pump, the
oil is furthermore filtered in an external oil filter of
the full flow filter type, pos. 9A, before it is led into
the lubricating system. The filter element is a disposable filter and must be replaced by a new one
as soon as its filtering ability has been used up.
The replacement can be carried out without reducing the refrigerant pressure on the compressor.
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