New Holland T8010 Manual page 88

STEP 17
As the engine warms up,
A. The fan RPM should stabilize between 800-
1000 RPM.
B. When engine coolant reaches 200-220° F
(93.3-104.4° C), fan speed should increase to
1 8 7 0 R P M o n a l l m o d e l s w i t h 4 0 K P H
transmission or 2125 on all models with 50
KPH transmission.
C. Air temperature at the fan drive should be 165-
195° F (73.9-90.6° C) when the fan engages.
With the fan engaged, record fan RPM, coolant
temperature and air temperature at the drive.
With the fan engaged while maintaining the test
RPM, fan speed should begin to decrease as
temperature decreases. After 2-3 minutes, the fan
should slow to the initial fan speed – about 1000
RPM on all models with 50 KPH transmission or 880
RPM on all models with 40 KPH transission.
Repeat this cycle several times while recording
temperatures and fan RPM.
STEP 18
1. Replace the viscous fan drive if:
50 KPH Transmissions: If the fan fails to reach
2125 RPM or higher (at least 85% of the test
RPM) at 200-220° F (93.3-104.4° C) coolant
temperature AND air temperature at the fan drive
exceeds 195° F (90.6° C).
40 KPH Transmissions: If the fan fails to reach
1870 RPM or higher (at least 85% of the test
RPM) at 200-220° F (93.3-104.4° C) coolant
temperature AND air temperature at the fan drive
exceeds 195° F (90.6° C).
2. The fan drive is not faulty if the fan fails to reach
8 5 % o f t h e t e s t R P M a n d t h e c o o l a n t
temperature EXCEEDS 220° F (104.4° C) and
air temperature at the fan drive does NOT
exceed 195° F (90.6° C). Check for the following:
A. Air flow restrictions through the air cooler, oil
cooler and radiator.
B. Internal radiator plugging.
C. Faulty thermostat.
D. Defective water pump.
3. If fan speed fails to slow down to 800-1000 RPM
after the fan drive disengages (with the test RPM
maintained), replace the viscous fan drive.
Section 10 - Engine - Chapter 5
10-5-9
RH03C032