Challenger Terra Gator 3244 Chassis. Manual - part 23

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3-5

Transmission and Solenoids

TRANSMISSION OIL CHANGE 
PROCEDURE

Start the machine and run it until the transmission oil

temperature warms. This is necessary to allow the oil to

flow freely during the draining procedure.

Place the machine on a hard, level surface and set the

parking brake. Remove the key and block the wheels.

FIG. 2: Remove the drain plug (1) (spanner 1½”) at the

underside of the transmission and drain the 56,7 L  (15

Gall) of transmission fluid into an appropriate container.

IMPORTANT: It is extremely important to work in a

clean environment when working with

hydraulic systems.

NOTE: There are multiple drain plugs located on the

transmission. Only one plug needs to be

removed to drain the transmission oil.

NOTE: Be prepared to collect and contain all fluids in

an approved container. Transmission capacity

56,7 L (15 Gall).

FIG. 3: The transmission filter (1) is located to the front

and to the right of the transmission. Loosen and

remove the transmission filter.

Drain the filter into an appropriate container.

FIG. 4: The screen filter (1) is located at the left.

Loosen the cover of the filter housing. Clean the filter

with pressurized air.

m

WARNING: Wear safety goggles when

work with pressurized air. Small part with

a blowing away can come in your eyes.

Serious injury can result.

FIG. 2

1

Q000028S

FIG. 3

1

Q000029S

FIG. 4

Q000028S

1

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FIG. 5: Reinstall the drain plug (1) (spanner 1½”) once

all oil has been drained from the transmission.

FIG. 6: Apply a light coating of oil to the o-ring on the

transmission filter. This will aid to create a tight seal.

Fill the transmissoin filter with AGCO 821XL (J20C) or

equivalents.

Install the transmission filter (1) by hand. When the filer

seal contacts the filter base, tighten the filter element by

an additional turn of 270 degrees. Rotation marks are

spaced at 90-degrees intervals. Use these rotation

marks as a guide for proper tightening.

FIG. 7: Refill the transmission with AGCO 821XL

(J20C) or equivalents through the transmission fill tube

(1). Check the level of oil with the dip stick (2), with a

running engine

. The transmission will hold approximately 56,7 L (15

gal).

IMPORTANT: Do not overfill the transmission.

Overheating of the transmission will occur,

resulting in possible damage to the

transmission.

Recalibrate the transmission and check for the proper

oil level.

FIG. 5

1

Q000028S

FIG. 6

1

Q000029S

FIG. 7

1

Q000030S

2

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Transmission and Solenoids

TRANSMISSION CALIBRATION

IMPORTANT: Calibrate the transmission every 1000

hours of operation or annually. Also calibrate

the transmission if shifting problems appear.

Calibration

IMPORTANT: Before starting calibration procedure,

park machine in area open on all sides of

machine. Do not park in front of a building,

vehicle or group of people when performing

this procedure. Never leave operator station

during calibration.

In order to start calibration the transmission oil temp

must be within 60°C to 65°C (140°F to 150°F), the park

brake must be on and the RPM’s must be set at 2100

or above.

FIG. 8:

Calibration can be entered by pressing all three buttons

on the display at the same time for 3 seconds. First

there will appear a radar calibration menu. Exit this

menu by pressing “ESC”, then the transmission

calibration menu will come up to confirm that the

operator wishes to start. To start calibration, select

“YES”. To exit back to normal operation select “NO”.

Once calibration has been started the display will show

the current status of calibration. If calibration cannot be

completed a reason will be displayed, and the display

will revert back to normal operation. If calibration is

successful the display will show a completed status and

resume normal operation.

Calibration Process

During the calibration the TCU will activate one by one

all the solenoids. The TCU adjust the length of  stroke

of the solenoids to the point the clutch will be engaged.

Every solenoid can have a different stroke length.

If the length of stroke is not correct, shifting will be very

tough. This will decrease the lifetime of the

transmission.

FIG. 8

Q000031S

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SYSTEM OPERATION SECTION

Hydraulic System

The transmission hydraulic system provides a

modulated flow of pressurized oil to the transmission.

The transmission contains nine transmission clutches.

The nine clutches are controlled by the nine

corresponding modulating valves (transmission). The

transmission provides the operator with 16 forward and

3 reverse gears.

The modulating valves (transmission) provide the

following control functions:

•

Proportional control of pressure;

•

Controls oil flow to clutch.