New Holland LS140 Workshop Manual page 165

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The following pump relief valves protect the direction

of motor (tire) rotation forward or reverse.

Front pump controls right motor.

1 - Forward (top)

2 - Reverse (bottom)

Rear pump controls left motor.

3 - Forward (bottom)

4 - Reverse (top)

8. Start the engine and run it at full throttle (LS140

at 3070 - 3150 RPM; and LS150 at 3410 - 3480

9. Stroke the hydrostatic control lever on the side

being tested and in the direction being tested and

take a pressure reading, the pressure should be

306 bar (4500 PSI). If the pressure is not at speci-

fication, 306 bar (4500 PSI), replace the suspect

relief valve.

NOTE: All four directional relief valves can be tested

in this manner.

If the pressure is within specification, refer to the

pump/motor case drain test for further testing to

locate the problem.

Always stay clear of moving parts during testing

or serious injury could occur.

SECTION 29 - HYDROSTATIC TRANSMISSION

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