AR20.40-W-0500-02B | Test hydraulic pressure and fan speed | ||
Danger! | Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. | |
Danger! | Risk of injury caused by moving parts that can pinch, crush or, in extreme cases, even sever extremities | No parts of the body or limbs should be within the operating range of the mechanism when moving components. | |
Danger! | Risk of injury to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning caused by swallowing hydraulic fluid | Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses. |
625 589 01 21 00
Measuring hose
Tester
Adapter
Ohm decade
957 589 02 63 00
442 589 00 90 00
124 589 09 63 00
Electrical connection kit
220 589 00 99 00
W20.40-1127-06
Check hydraulic motor and hydraulic pump
1 Disconnect electrical connector (1) at hydrostatic fan (Y66)
2 Start engine.
Engine must be cold.
3 Point digital tachometer at fan (2), read fan speed off on digital tachometer and hydraulic pressure from tester (3).
Check at different engine speeds (according to table).
4 Compare fan speed and hydraulic pressure according to table.
If measurement results deviate:
When the hydraulic pressure is too low, replace hydraulic pump.
If the hydraulic pressure is okay and the fan speed is too low, check hydraulic motor (4) and hydrostatic fan proportional valve (Y66).
For the following vehicles, the measurement results are at 600 rpm and 1000 rpm below the tabular value:
Vehicles with diesel engine and vehicle ident. end no. to V 218937
Vehicles with gaseous fuel engine and vehicle ident end no. to V 217403
5 Switch off engine.
6 Connect electrical connector (1) to hydrostatic fan proportional valve (Y66).
Engine speed (rpm) | Fan speed (rpm)10% | Hydraulic pressure (bar)10 % |
600 | 980 | 50 |
1000 | 1620 | 115 |
1400 | 2220 | 205 |
2000 | 2390 | 235 |
W20.40-1137-11
Check function of hydraulic engine and hydrostatic fan proportional valve (Y66)
7 Disconnect electrical connector (4) from coolant temperature sensor.
8 Connect decade resistor (5) with suitable connection from electrical connection set to electrical connector (4) and adjust resistance (according to table).
9 Start engine.
10 Point digital tachometer at fan (2), read fan speed off on digital tachometer and hydraulic pressure from tester (3).
Check with various resistance values and motor speeds (according to table).
11 Compare fan speed and hydraulic pressure according to table.
If the hydraulic pressure is okay and the fan speed is too low, replace hydraulic motor (4) with hydrostatic fan proportional valve (Y66).
For the following vehicles, the measurement results are at 600 rpm and 1000 rpm below the tabular value:
Vehicles with diesel engine and vehicle ident. end no. to V 218937
Vehicles with gaseous fuel engine and vehicle ident end no. to V 217403
12 Switch off engine.
13 Disconnect decade resistor (5).
14 Connect electrical connector (4).
Resistance (ohm) 2 Ω = 92 °C coolant temperature | Engine speed (rpm) | Fan speed (rpm)10% | Hydraulic pressure (bar)10 % |
230 | 600 | 780 | 32 |
230 | 1000 | 815 | 35 |
230 | 1400 | 855 | 40 |
230 | 2000 | 900 | 45 |
Resistance (ohm) 2 Ω = 95 °C coolant temperature | Engine speed (rpm) | Fan speed (rpm)10% | Hydraulic pressure (bar)10 % |
214 | 600 | 960 | 47 |
214 | 1000 | 1400 | 88 |
214 | 1400 | 1450 | 95 |
214 | 2000 | 1500 | 104 |
Resistance (ohm) 2 Ω = 101 °C coolant temperature | Engine speed (rpm) | Fan speed (rpm)10% | Hydraulic pressure (bar)10 % |
185 | 600 | 965 | 47 |
185 | 1000 | 1530 | 105 |
185 | 1400 | 2190 | 195 |
185 | 2000 | 2385 | 232 |
Henviste dokumenter
- as0000z000501a Fare for ulykke ved automatisk igangsætning når motoren kører. Fare for personskade på grund af knusning og forbrænding, hvis der arbejdes mens motoren startes eller kører
- as0000z000901a Fare for personskade som følge af klemning af legemsdele, i værste fald fare forafskæring af legemsdele ved indgreb i mekanikken
- as0000z001301a Fare for kvæstelser på hud og øjne på grund af sprøjtende hydraulikvæske, som erunder højt tryk. Forgiftningsfare ved indtagelse af hydralikvæske