Contents: Special tool required 🠛 Operating principle 🠛 Calibration of the device 🠛 Checking the calibration 🠛 Table 1.4 🠛 Engine D7F 🠛 Engine E7J 🠛 Engine F8Q 🠛
Special tool required
Mot. 1273 Belt tension measuring device.
Fig. 1.4a:
A - Measuring block;
B - Receiving unit with display;
C - Connecting cable;
D - Control calibration plate.
Operating principle
The measuring unit, using the knob 1 of the regulator of the pressure device 2 and the outer tabs 3, imparts a constant deflection to the belt. The reaction force of the belt is measured using the control plate 4, equipped with strain gauges. The stretching of the strain gauges leads to a change in their resistance. This change, converted by the device, is displayed on the display in SEEM (US) units.
(You can find the original at this link: Renaultbook.ru)
Calibration of the device
The device is adjusted by the manufacturer, but every six months it is necessary to perform a control check of its readings.
Method of measurement
Setting to zero:
- turn on the power supply of the device (button E) with the handle 1 positioned at the bottom of the measuring unit;
- if the display shows 0, then the device can be considered ready for operation;
- if there is no reading on the display, check the condition of the device battery with a nominal voltage of 9 V;
- if the display shows a value other than 0, set it to 0 by turning screw F.
Figure 1.4b
Checking the calibration
Turn on the power of the device (button E).
Place the Z reference plate into the measuring block as shown in the figure (engraved control marks upwards, A - minimum value, B - maximum value). Turn knob 1 of the pressure device regulator until the third click, thereby preparing the device for operation.
Make sure that the display shows a value X that is between values A and B (A < X < IN).
Table 1.4
Engine D7F
Figure 1.5a. Generator drive belt:
A - Crankshaft pulley;
B - Generator pulley;
-> - Belt tension control point.
Figure 1.5b. Power steering pump drive belt:
A - Crankshaft pulley;
C - Power steering pump pulley;
-> - Belt tension control point.
Engine E7J
Figure 1.6a. Generator drive belt:
A - Crankshaft;
B - Generator;
T - Tension roller;
-> - Belt tension control point.
Figure 1.6b. Power steering pump drive belt:
A - Generator pulley;
C - Power steering pump pulley;
T - Tension roller;
-> - Belt tension control point.
Engine F8Q
Figure 1.7a. Generator drive belt:
A - Crankshaft pulley;
B - Generator pulley;
T - Tension roller;
-> - Belt tension control point.
Figure 1.7b. Power steering drive belt F8Q:
A - Crankshaft pulley;
B - Generator pulley;
C - Power steering pump pulley;
T - Tension roller;
-> - Belt tension control point.