Case MXM120, MXM130, MXM140 Tractor Repair Manual

Manuals: Repair Manual

SECTION 00 – GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SECTION 10 – ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SECTION 18 – CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SECTION 21 – TRANSMISSION SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

SECTION 23 – DRIVE LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

SECTION 25 – FRONT AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

SECTION 27 – MECHANICAL REAR WHEEL DRIVE . . . . . . . . . . . . . . . . . . . . 26

SECTION 31 – POWER TAKE-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

SECTION 33 – BRAKES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SECTION 35 – HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

SECTION 41 – STEERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

SECTION 44 – FRONT AXLE AND WHEELS . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

SECTION 50 – AUXILIARY UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

SECTION 55 – ELECTRICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

SECTION 90 – CAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

The following pages are the collation of the contents pages from each section and chapter of the MXM120, MXM130, MXM140 Series Repair manual. Complete Repair part # 87613647.
Manual Extract: SENSORS
A sensor is the primary component of a

measurement chain that converts the input variable (temperature, capacitance, reluctance) into a signal suitable for measurement. The relationship between the input variable and the measured signal is a characteristic of the sensor.

In the above mentioned measurement chain the signal is filtered and treated in order to adapt it to its use. It consists of three elements: the sensor itself; the converter, which converts the output signal from the sensor (in most of the cases into an electric signal); and the conditioner, which transforms the output signal from the converter in the most suitable form. Generally the term sensor indicates the entire measurement chain.

Temperature Sensors
Generally based on a simple circuit with a thermistor.
A thermistor is a resistor that changes its resistance according to the temperature.

There are two groups of thermistors: NTC (Negative Temperature Coefficient) and PTC (Positive Temperature Coefficient). In the first case the higher the temperature, the lower is the resistance, and for the PTC the higher the temperature, the higher the resistance. The NTC are often used as sensors to indicate temperature change in fluids, such as the engine coolant fluid.

An example of these type of senders is the coolant temperature sender. The changes in its resistance (which varies with temperature) are relayed to the Instrument Cluster, which operates the bar graph and the warning indicators accordingly.