Dnepr MT10-36 - Care of Lubricating System

Ca re of Lubricating System
During daily preventive inspection, check the presence of oil in
the crankcase. If necessary, a· dd oil by pouring it from a clean ves-
sel,
through a dense gauze with a mesh sizing not more than
·0. 63X0.63 mm . The oil dipstick is provided with two ma rks to indi-
cate the lower and upper limits of oil level. Before checking the oil
level, wipe
the dipstick and lower it into the crankcase t'iller to the
full depth without screwing up the plug. Oil should be changed in
i he hot engine.
When changing oil in the crankcase, thoroughly clean dirt from
the plugs of the drain and filling holes of the crankcase and uns-
~rew the plugs. Th en drain the used oil, screw in the drain hole
plug, pour in 1.2 to 1.5 1 of industrial oil 12 (spindle oil 2) and
scr · ew in the filler plug. Now start the engine and allow it to opera -
te with in 2 and 3 min, then drain oil again. Following that, pour
fresh oil in the crankcase until it reaches the upper mark of the dip-
st ick.
In the winter time, oil should be warmed before filling. Oil
should be filled from a clean vessel taking care not to allow dirt,
dust, and moisture to get in the engine crankc-ase.
Remember that even a short-time failure of the lubricating sys-
te m may cause a brea~down of the engine.
Overheating of the cylinders and their heads , power drop and
knocks in the engine are an indic-ation of insufficient lubrication.
The operation of the lubricating system is monitored by means
of an emergency oil pressure transmitter, diaphragm-type, 22 (Fig.
10), which operates when the pressure in the system drops to
1.7
~8:! kgf/cm
2
.
The pres .c;ure drop is signalled by a warning lamp fitted on the
dashboard . When the ignition i·s switched on, the oH • pressure war-
ning l amp comes on; after the engine is started, the lamp extin-
guishes. If the lamp is on under operating conditions, this indi-
cates that the Jtransmibter or the engine is a·t fault. In this case the
engine must not be operated until t-he fault is traced and elimi-
nated.
In case the emergency oil pressure transmitter warning lamp is
on at the average crankshaft speed, the engine pan must be remo-
ved, the
reducing valve disassembled and its seat cleaned.
In case the engine is overheated or operates at low idling speed
(n=650-700 rpm) the lamp can be on even if the lubricating sy -
stem is sound.
It is good practice to periodically screw out the transmitter and
to check the oi1l pressure with a reference pressure gauge. The oil
pres · sure at the average crankshaft speed, with the engine warmed
up (at the oil temperature of about plus 80 oq must be not less
than 3 kgf/cm
2
and not more than 6.0 kgf/cm
2
•
The centrifugal forces developed during the engine operation
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