New Holland T8010 Manual page 87

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Loosen the shroud mounting screws on the left hand

side of the fan, and route the temperature probe

between the front of the viscous drive and the

Secure the temperature probe to the rear of the

radiator with wire ties so the sensing probe measures

air temperature within 1 inch (25.4 mm) of the center

of the fan drive.

Route the electrical lead to the probe so temperature

readings can be taken with the hood closed.

Start the engine, and turn electrical loads ON (lights

and work lamps).

Measure the fan drive shaft speed with the photo

tachometer aimed at the reflective tape on the shaft.

Increase engine speed until fan drive shaft speed reaches

2200 rpm on all models with 40 KPH transmission or 2500

rpm on all models with 50 KPH transmission.

NOTE: Fan drive shaft speed is not the same as

engine speed. Fan drive to engine speed ratio is

1.1:1 on all 40 KPH transmission models and 1.25:1

on all 50 KPH models.

Lock the throttle at this RPM. This establishes the fan

drive shaft test RPM.

Install the magnetic base for the photo tachometer on

the top of the left hand rail. Install the photo pickup on

the base and aim it at the reflective tape on the fan

blade. Route the leads to the photo pickup so they will

not interfere with any rotating parts with the hood closed.

Reinstall any side panels removed. Close the hood.

Cover the front grille screen. Measure the fan blade

speed with the photo tachometer.

Section 10 - Engine - Chapter 5

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T8020 T8030 T8040