MTZ K-744R1, Руководство по эксплуатации

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KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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Check of temperature sensor
Set the check switches into position 1. Install the sensor being checked into the cup for heating
and bring water in the cup to boiling by means of a heater. Connect the sensor terminal to the
socket, and the “frame ground” – to socket II and determine, at the water boiling temperature,
the micro-amperemeter readings with the button being pressed.
The micro-
amperemeter readings shall be within the range of (33±2) μA.
Faulty sensors and gauges shall be subject to replacement.
Check of the condition of electrical wiring
In order to identify a wire break, activate the circuit and, by means of reference lamp or
combined device
Ц-4324, determine the break area. To this end, connect one wire from the
device or lamp to the “frame ground”, and touch, with the end of the other wire, alternately the
clamps, tips or cores of the wire, starting from the storage battery to the non-operating user.
See when the lamp will go out or the device pointer will deviate to zero. It will mean that the
circuit has a break at the section from the non-operating user to the given connection point.
In order to determine the closure of wires with each other or to the “frame ground”, disconnect
all ends of the wires being checked from the fastening clamps. Using the device, measure
resistance of the w
ire being checked with respect to the “frame ground” (the other wire). In case
when the closure is missing, the device will correspond to the infinite value of resistance. If the
closure is present, the device will show a finite resistance value.
Maintenance of air conditioning system
In operation with the use of air conditioner, it is necessary to do the following:
1. Every day perform an inspection of the condenser and remove chaff, vegetation
particles, stuck dirt from the plates and interplate cavities and blow off the condenser with
compressed air as well as check the tension V-belt of the compressor drive.
2. During execution of M-1, M-2, M-3 check the belt tension of the compressor drive and,
if necessary, make adjustments. The belt deflection (F
ig.40) when a force of 4±0.2 kg is
applied at point “P” shall be within 9...14 mm.
Fig. 40 Adjustment of the tension of
belt of the compressor drive
P