of

3/4

inch between the edge of the lever and the top end of the slot

in the quadrant as shown in fig. 29.

(5) Make sure that the control arm moves freely and is held in a

horizontal position by its own weight as shown in fig. 29. Loosen

the position control lock nut, and adjust the length of the position

control spring by turning the position control spring adjustment

bolt (fig. 30). Adjust the position control spring length until the

position control pin contacts the cam, and the position control spring

adjustment bolt contacts the control arm, as shown in fig. 29. It

will probably be necessary to hold the position control pin in contact

with the cam. The position control spring length should be 1

29/32

inches plus or minus

1/16

inch after the adjustment has been made

(fig. 30). Tighten the position control spring lock nut after complet-

ing the adjustment.

After the above adjustments have been made, check the position

of the hydraulic touch control lever and lift arms to be sure they

were not moved while making the adjustments.

(6) Install the hydraulic unit on the tractor, making sure that

the end of the control arm enters the opening in the valve control

lever and that the control arm is not bent or damaged in any way

during this operation. Do not install the inspection plate.

(7) Place the position control lever in the forward position,

support the lower links near the raised position, and place the

hydraulic touch control lever at the top of the quadrant. Check the

position and operation of the intake control valve as follows:

(a)

POSITION OF VALVE.

The valve should be completely open

when the hydraulic touch control lever is at the top of the quadrant.

The valve is open when, by inserting the hand in the inspection

opening, it is impossible to press the end of the control valve arm

toward the pump face any farther.

(b)

OPERATION OF VALVE.

Movement of the hydraulic touch

control lever away from the top of the quadrant should cause a

simultaneous movement of the control valve arm away from the

pump face. Movement of the control valve arm should begin at the

start of movement of the hydraulic touch control lever.

There is only one position in which the quadrant support plate

can be located where both of the above conditions will be met. To

find this position, slightly loosen the four cap screws that support

the quadrant. Hold the hydraulic touch control lever at the top of

the quadrant and gently tap the quadrant support plate forward or

backward until both of the above requirements are fulfilled.

(8) Tighten the four quadrant support cap screws securely and

install the inspection plate on the center housing.

§ 143. b. (8)

3730-47J

100