Replacing the Drive Belt

6405 Tractors

Press catch (A) and pull hood forward.

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Open hood and engage support (B); see arrow.

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6605 Tractors

Pull lever (A) forward to unlock hood. The hood can now be folded up. Push down catch (B) to open the hood fully.

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Removing Grille Screens (6405 Tractors)

Open hood, push down locking bolt (A) and remove grille screens from the side.

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Removing Grille Screens (6605 Tractors)

Open hood, push locking bolt (A) forward and remove grille screens from the side.

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Removing Fan Guard

Remove grille screen. Unscrew nuts (A) and remove fan guard from the side.

IMPORTANT: Remember to put the fan guard back as soon as the job is completed.

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6405 Tractors

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6605 Tractors

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Relieving Drive Belt

causym CAUTION: Disconnect the battery ground cable (-)

Slacken off the four hex. nuts and push the fan forward.

Use a 15 mm (19/32 in.) wrench to turn the cap screw in the idler roll clockwise (see arrow) until the two holes (A) and (B) are aligned.

Insert a metal pin with a dia. of 5 mm (0.2 in.) into the two aligned holes.

Before tensioning, turn the idle roll a little to relieve the pressure on the metal pin, and then take out the metal pin. The drive belt tensioner returns to its tensioning position automatically.


A-Hole (cam)
B-Hole (base plate)
C-Idler roll

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Remove old drive belt from pulleys, and cut.

Remove the three expanding plugs (A) of the shroud. Place a loop of the new drive belt (B) between fan and shroud.

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Turn fan while at the same time placing the drive belt around the fan.

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Installing New Drive Belt

Slacken drive belt tensioner and install drive belt correctly.

For further assembly, see "Removing Drive Belt".


A-Crankshaft
B-Idler roll
C-Fan
D-Alternator
E-Coolant pump
F-Deflection roll
G-Compressor (air conditioning system)

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