7. ADJUSTMENT AND REPAIR

2)Tightening Torque and Mounting Angle for Rod Joints

Tightening torque : L-ball 8A

Tightening torque : 5.79 to 7.23 ft lbf (7.8 to 9.8 N m)

Tightening torque : 9.40 to 12.3 ft (12.7 to 16.7 N m)

L-ball mounting angle

90degrees

The angle should be 90 degrees.

026997-00X

7-3-3Adjustment of Control Levers

1)Adjustment of Control Levers

(1)Move the lever boot 1 upward and loosen the lock nut 2

(2)Adjust the right and left control levers 3 so that the distance between them will be 18.7 in. (476 mm) and also adjust the right control lever 3 so that it doesn't interfere with the blade lever 4.

(3)Adjust the right and left control levers 3 so that they will be in a straight line when viewed from the side.

(4)Holding the adjustable nut 5, tighten the lock nut 2 at a specified torque (for each control lever).

Adjust nut 5 (Width across flats : 22)

Tightening torque for lock nut

Tightening torque : 73.5 to 83.4N•m (7.5 to 8.5kgf•m)

In neutral position

Lock lever

7-3-4Adjustment of Travel Levers

1)Position of Travel Lever Grips

Remove the step and the side cover L.

(1) Difference in height between the right and left lever grips : Within 0.08 in. (2 mm)

(2)Adjustment

Difference in side level

•Loosen the nut 1 of the L-ball and rotate the rod 2 to adjust the position of the lever grip to 2.44 in. (62 mm) from the rear end of the lever stand (for each lever grip) as shown in figure.

•After adjusting the difference in side level between both levers to 0.12 in. (3 mm) or less, tighten the nuts 1

2)Adjustment of Stopper Bolts (For Forward Travel and Reverse)

(1)Loosen the lock nuts 4 of the stopper bolts 3

(2)Screw in the stopper bolts 3 so that the travel lever will not touch them.

(3)Move the travel lever to its stroke end, and loosen the stopper bolt 3 until the bolt head touches the travel lever (for each stopper bolt).

(4)Loosen the stopper bolt 3 half a turn further and tighten the lock nut 4 to fix it.

Difference in side level between both lever grips : within 0.12 in. (3mm) (in neutral and full stroke position)

62mm

Tightening torque :

Mounting angle of L-ball 9.40 to 12.3 ft·lbf (12.7 to 16.7 N·m) 5.79 to 7.23 ft·lbf (7.8 to 9.8 N·m)

90degrees

Tightening torque :

7-3-5Adjustment of Boom Swing Pedal

1)Setting Pedal Level

Remove the step and side cover L.

(1)Loosen the nut 2 of the cable 1

(2)Adjust the cable 1 so that the pedal will be level.

(3)Tighten the nut 2 of the cable 1

2)Adjustment of Stopper Bolts (For Right and Left Boom Swing)

(1)Loosen the lock nuts 3 and screw in the stopper bolts 4 so that they will not touch the boom swing pedal.

(2)Move the boom swing pedal to its stroke end, and loosen the stopper bolt 4 until the bolt head touches the pedal (for each stopper bolt).

(3)Loosen the stopper bolt 4 half-turn further and tighten the lock nut 3 to fix it.

7-3-6Adjustment of Blade Lever

Remove the step, the side cover R, the indicator box and cover plate, and then remove the pilot valve (RH).

(1)Loosen the nut 1 and adjust the blade lever so that the supporting center point of the lock lever R and the I end position of the cable are level in the neutral position.

(2)Adjustment of stopper bolts 3 (for the blade up and down)

[1]Loosen the lock nuts 2 and loosen the stopper bolts 3 so that they will not touch the blade lever.

[2]Move the blade lever to its stroke end, and tighten the stopper bolt 3 until the bolt end touches the blade lever (for each stopper bolt).

[3]Tighten the stopper bolt 3 half-turn further and tighten the lock nut 2 to fix it.

7-3-7Adjustment of Lock Lever Switch

(1)Remove the panel L 1

(2)Adjust the operating force of the lock lever when the lever operating from unlock position to lock position is 13.2 lbf (58.8 N) or less.

(3)Adjust the switch 3 so that the length shown in the figure will be within the rage from 0.18 to 0.22 in. (4.5 to 5.5 mm) when the switch is fully pressed in.

Note :

The implement should not operate even if the control lever is moved when the lock lever is in the lock position.

Tightening torque :

21.7 to 25.3 ft lbf (29.4 to 34.3 N m)

Note : Overtorque may cause damage to the switch.

7-3-8Adjustment of Accelerator Lever

(1)Adjust the outer accelerator cable 1 installation to the illustrated dimension and fix it with the snap nut 2.

(2)Check (adjust) that the regulator handle 4 of the engine is in the low idling position in the condition in which the accelerator lever 3 touches the forward plate, and fix the snap nut 6 of the outer accelerator cable 5 in the accelerator side.

(3)Pull the accelerator lever 3 forward (high idling side) and check (adjust) that the regulator handle 4 of the engine is in the high idling position, and then fix the nut 8 after touching the stopper bolt 7 with the accelerator lever 3.

(4)Operate the accelerator lever 3 and make sure that the regulator handle 4 of the engine is operating in full-stroke without the crimp and tension in the inner cable.

(5)Adjust the operating force of the accelerator lever 3 with a lock nut.

(Operating force of F portion: 13.2 to 17.6 lbf (58.8 to 78.4))

7-3-9Adjustment of P.T.O. Pedal

1)Setting Pedal Level

(1)Loosen the nut 2 of the cable 1

(2)Adjust the cable 1 so that the P.T.O. pedal will be level.

(3)Tighten the nut 2 of the cable 1

2)Adjustment of Stopper Bolts (on Both Sides)

(1)Loosen the lock nuts 3 and screw in the stopper bolts 4 so that they will not touch the P.T.O. pedal.

(2)Move the P.T.O. pedal to its stroke end, and loosen the stopper bolt 4 until the bolt head touches the pedal (for each stopper bolt).

(3)Loosen the stopper bolt 4 half a turn further and tighten the lock nut 3 to fix it.

3)Adjustment of Pedal Lock

(1)After the adjustment of the pedal stroke, move the P.T.O. pedal to its stroke end on the left and place the P.T.O. pedal lock 5 on the P.T.O. pedal.

(2)Adjust the clearance between the P.T.O. pedal lock 5 and the P.T.O. pedal to 0.08 in. (2 mm) or less with the bolt 7 and the nut 8.

(3)Adjust the operating force for the P.T.O. pedal lock 5 at the end, with the lock nut 6, to a value within a specified range : 2.2 to 4.4 lbs. (1.0 to 2.0 kg).

7-3-10Adjustment Procedure of Travel Alarm Switch (Left and Right)

(1)Set the travel lever 1 to the neutral position.

(2)Loosen bolt 4 (2 pcs.) of bracket 3 of travel alarm switch 2

(3)Adjust the distance between the travel lever arm 5 and the travel alarm switch 2 to 0.02 in. (0.5 mm) or less.

Note :

Make the clearances A and B equal.

(4)Check that the alarm sounds without fault when each travel lever on either side is operated in forward and reverse.

7-4Swing Bearing

1)Removal and Reinstallation of Swing Bearing

(1)Remove the implement.

Refer to Section "7-6-1 Removal and Reinstallation of Implement".

(2)Remove the engine.

Refer to Section "7-1-5 Removal and Reinstallation of Engine".

(3)Remove the swing motor.

Refer to Section "7-5-3 Removal and Reinstallation of Swing Motor".

(4)Remove the hydraulic hoses from the swivel joint.

Refer to Section "7-5-4 Removal and Reinstallation of Swivel Joint".

(5)Rope the turning frame 1 at three points and suspend it temporarily.

(6)Remove the seventeen mounting bolts 2 with which the turning frame 1 is mounted on the outer race of the swing bearing.

(7)Lift up the turning frame 1

(8)Remove the eighteen mounting bolts 3 with which the inner race of the swing bearing is mounted on the track frame.

(9)Remove the swing bearing 4

2)Points of Installation

The inner and outer races of the swing bearing have a soft zone, and the soft zone of the inner race is marked with "S".

The soft zone of the outer race is located at the steel ball insertion port.

To reduce the load to be applied to the soft zones, as shown in the figure at the right, install the swing bearing with the "S" mark on the right side of the track frame and the steel ball insertion port on the left side of it.