Challenger Terra Gator 3244 Chassis. Manual - part 29

627333-A  

3-29

Testing and Adjusting

FIG. 11: Modulating Valves

Each modulating valve has a designated letter, as

shown. The letters have been cast into the

transmission housing.

Log the clutch pressures in the table on the next page.

There are always two clutches that are engaged for

each gear selection. Neutral position only uses one

clutch. See the table in order to determine the clutches

that are engaged for gear selection.

FIG. 11

Q000051S

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627333-A  

Testing and Adjusting

1. Make sure that the transmission control lever is in

the park brake position.

2. Warm the oil to a minimum temperature of 60°C

(140°F).

NOTE: Third gear that uses clutches E and G is shown

in the following test:

3. Connect one end of tooling (A) to the test port on

valve E. Connect one end of a second tooling (A) to

the test port on valve G.

4. Operate the transmission in third gear at high idle.

5. Observe the pressure that is being delivered to

transmission clutches E and G. Use the table above

(or a copy of that table) to write down the

measurement.

6. Stop the engine.

7. Repeat steps 3 through 6 for the remaining reverse

gears and forward gears. Use the table in order to

determined the combination of modulating valves

that are being engaged for each gear.

8. Compare the pressure measurements from all of

the transmission clutches. The pressure

measurement should be within 2100 ± 35 kPa (305

± 5 psi).

9. Remove tooling (A).

10. Stop the engine.

11. If the pressure is not within the specified limits,

check the pressure that is being delivered by the

relief valve (charge pressure).

Checklist for Transmission Clutch Pressures

Gear

Clutch or Valve

Pressure 

Measurement

Clutch or Valve

Pressure 

Measurement

Third gear (reverse)

A

H

Second gear (reverse)

A

B

First gear (reverse)

A

G

Neutral

J

-

First gear

C

G

Second gear

D

G

Third gear

E

G

Fourth gear

F

G

Fifth gear

C

B

Sixth gear

C

H

Seventh gear

D

B

Eighth gear

D

H

Ninth gear

E

B

Tenth gear

E

H

Eleventh gear

F

B

Twelfth gear

F

H

Thirteenth gear

C

J

Foureenth gear

D

J

Fifteenth gear

E

J

Sixteenth gear

F

J

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3-31

Testing and Adjusting

HYDRAULIC OIL COOLER

FIG. 12:

m

WARNING: Escaping fluid under

pressure, even a pinhole size leak, can

penetrate body tissue, causing serious

injury, and possible death. If fluid is

injected into your skin, it must be treated

immediately by a doctor familiar with this

of injury.

Always use a board or cardboard when

checking for a leak.

m

WARNING: Personal injury can result

form hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the

hydraulic system after the engine has

been stopped. Serious injury can be

caused if this pressure is not released

before any service is done on the

hydraulic system.

Make sure all of the attachments have

been lowered, oil is cool before removing

any components or lines. Remove the oil

filler cap only when the engine is

stopped, and the filler cap is cool enough

to touch with your bare hand.

IMPORTANT: Care must be taken to ensure that fluids

are contained during performance of

inspection, maintenance, testing, adjusting

and repair of the product. Be prepared to

collect the fluid with suitable containers before

opening any compartment or disassembling

any component containing fluids.

Introduction

The following test procedure will check the pressure of

the oil that returns the hydraulic oil cooler.

Required Tools

FIG. 13: The tool to check the oil pressure contains a:

•

Pressure Gauge, to read the pressure;

•

Fitting, to connect the pressure gauge to the hose;

•

Quick Connect Coupler, to connet the pressure

gauge to the transmission.

•

Hose As, to allow make a distance between

pressure gauge and the measure point.

FIG. 12

Q000119S

FIG. 13

Q000046S

Testing and Adjusting

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627333-A  

Test Procedure

FIG. 14: Pressure tap location for the hydraulic cooler

return oil.

1. Warm the oil to a minimum temperature of 60°C

(140°F).

2. Connect tooling (A) to test port (1).

3. Start the engine. Run the engine at high idle.

4. Make sure that the temperature of the hydraulic oil

is at least 60°C (140°F). Record the pressure of the

hydraulic oil that is coming from the hydraulic oil

cooler. The pressure of the oil that is returning from

the hydraulic oil cooler should be 520 kPa (75 psi).

5. Remove tooling (A) from test port (1).

6. Stop engine.

FIG. 14

Q000052S