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Resumen del manual
(See Figure 20.) Remove the hairpin cotter ard clevis pin from the other end of the brake rod to disconnect it, and tighten the nut. Recheck the adjustment making certain correct adjustment is reached before operating the tractor. 1 Figure 20. 1. Hairpin Cotter 2. Hex Nut 3. Brake Rod 4. Clevis Pin ADJUSTING THE BRAKES (1220 Tractor) During normal operation of this tractor, the brakes are subject to wear and will need periodic examination and adjustment. To check the brake adjustment, engage the hydrostatic dump valve so unit can be pushed. Then lock the parking brake (hydrostatic dump valve is still engaged). You should not be able to push the tractor. If the tractor can be pushed with the parking brake locked, or if the unit cannot be pushed with the parking brake released, brake adjustment is necessary. To adjust the brake, adjust the nut on the end of the brake rod until there is approximately 1/8 inch to 3/16 inch space between the spacer and cam lever. (See Figure 21.) Recheck the adjustment, making certain correct adjustment is reached before operating the tractor. 1. Cam Lever 2. 1/8 inch to 3/16 inch Space 3. Spacer 4. Nut NEUTRAL ADJUSTMENT FOR THE SPEED CONTROL LEVER (1220 Tractor) (See Figure 22) ^^NOTE Spring from pedal assembly to frame strap was removed in Figure 22 for clarity only. If the speed control lever does not return to the neutral notch on the speed control when the brake pedal is depressed, make the following adjustment: 1. Remove the cotter pin and clevis pin from turn-buckle “A” at actuating arm assembly. 15 Figure 22. Figure 23. 1. Turnbuckle “A" 2. Hex Nut 3. Actuating Arm Assembly 4. Clevis Pin 5. Cotter Pin 6. Frame strap 2. Loosen hex nut and thread the turnbuckle “A" inward or outward, so as to move the speed control lever into the neutral position on the fender. 3. Retighten hex nut and reassemble the clevis pin and cotter pin and spread. ■^NOTE If the tractor creeps while the speed control lever is in neutral (“N”), the controls at the hydrostatic transmission must be adjusted. HYDROSTATIC TRANSMISSION CONTROL ADJUSTMENT (1220 Tractor) (See Figure 23) 1. Block the rear of the tractor up so both rear wheels are off the ground. 2. Remove the cotter pin and clevis pin from turnbuckle “B” at actuating arm assembly. Loosen hex nut. 3. Thread turnbuckle “B” inward or outward one or two turns. 4. Reattach turnbuckle “B” to actuating arm assembly with the clevis pin. Do not install cotter pin at this time. 5. Start the engine and run at idle speed. 6. If rear wheels do not turn, turnbuckle “B” is adjusted properly. If the wheels do turn, shut off 1. Turnbuckle "B” 2. Hex Nut 3. Actuating Arm Assembly 4. Clevis Pin 5. Cotter Pin 6. Frame strap engine and readjust turnbuckle “B”. Repeat this operation until the wheels will not turn when the speed control lever is in neutral (“N"). 7. Secure the clevis pin with the cotter pin. 8. Remove blocks from under tractor and set the speed control lever in neutral (“N”). 9. Start the engine, checking to see if the tractor creeps. Repeat above adjustment if necessary. PIVOT BAR ADJUSTMENT BOLTS A CAUTION The tractor must be checked every 50 hours of tractor operation for play between the front axle and the pivot bar adjustment bolts. Both adjustment bolt heads must fit against the front axle. If play is discovered, the pivot bar adjustment bolts must be adjusted. If play is discovered between the front axle and the pivot bar adjustment bolt heads, adjust both bolts as follows: (See Figure 24.) 1. Loosen jam nut 3 to 4 turns or as required. 2. Turn pivot bar adjustment bolt counterclockwise until it hits against the front axle. 3. Tighten jam nut. 4. Repeat the above steps for the other pivot bar adjustment bolt. 16 rl IB*—2 SECTION A-A Figure 24. 1. Jam Nut 2. Pivot Bar Adjustment Bolts 3. Front Axle WHEEL ALIGNMENT The front wheels should toe-in approximately 1/8 inch. Measure the distances A and B on the front wheels. (See Figure 25.) ■^note Dimension B should be approximately 1/8 inch less than dimension A. A (S (1/8” LESS THAN A) Figure 25. FRONT WHEEL ADJUSTMENTS. To adjust the toe-in remove one ball joint, loosen lock nuts “C” at the ball joint and turn the tie rod bail joint in or out as required. (See Figure 26.) ■^note Tie rod has a bend in the center for clearance of castle nut on pivot bar. Bend must remain down as shown in Figure 26. TURNING RADIUS A CAUTION Be sure all parts are tightened after completing the following adjustment. The front wheels should have an equal angle for left and right turns. If adjustment is necessary, remove ball joint and loosen lock nut “D”. (See Figure 26.) Turn the drag link ball joint clockwise or counterclockwise as required. 17 Figure 26. Tie Rod and Drag Link Ball Joints. 1. Castle Nut at Pivot Bar 2. Bend in Tie Rod 3. Lock Nut “D” 4. Lock Nut “C” Carburetor adjustments should be made with the air...
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