New Holland LS140 Workshop Manual page 170

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The following pump ports control 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)

IMPORTANT: Check and make sure the flowmeter is

connected properly, so when the pump is stroked the

flow from the pump goes to the motor and to the inlet

side of the flowmeter.

IMPORTANT: Check the hydraulic oil level and add

if required to insure sufficient oil for the test.

9. Using the EIC or a photo tach, set the engine

speed to 2900 RPM (LS140) or 3200 RPM

10. Stroke the control lever for the direction to be

tested and take a free flow pressure reading and

Always stay clear of moving parts during testing

or serious injury could occur.

11. Turn the pressure regulator valve, 1, in on the

flowmeter until a pressure reading of 136 bar

(2000 PSI) is obtained and record.

12. Motor efficiency specifications:

When figuring the motor efficiency, it should not

be less than 80%. The motor free flow should not

be less than 15.9 GPM (81 LPM).

a. Motor flow recorded at 136 bar (2000 PSI) di-

vided by the free flow reading at zero pres-

sure will determine the motor efficiency.

Motor free flow - 18.5

Motor flow at 2000 PSI - 16.5

Motor efficiency:

SECTION 29 - HYDROSTATIC TRANSMISSION

= 0.89 or 89%

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