BRAKE ADJUSTMENT
The foot brake is properly adjusted if it slows the machine when depressed and can be locked when the pedal is depressed fully.
Adjust brake tension by removing cotter pin and brake pedal pin and turning brake clevis located under pedal on brake rod. When adjustment is complete, attach clevis to pedal with pin and cotter pin.
WING MOWER DRIVE BELT TENSION
Proper Belt tension allows mowers to be driven without slippage but loose enough to be deflected slightly at a point midway between the pulleys. An overtight belt will cause excessive bearing wear and a slipping belt causes excessive belt wear. IMPORTANT: Never allow oil to get on the belt which could cause slipping.
Adjust tension by loosening set screw (Fig. E) in the wing mower pull arm, sliding the mower rearward and retightening set screw.
NATIONAL® 68" SR & DL TRIPLEX – CE
NOTE
Guards removed
to show detail
FRONT
OF
MACHINE
REAR MOWER DRIVE BELT TENSION
Follow the recommendations above for determining proper tension and refer to Figure J.
Spacers (1, Fig. J) are provided on the rear mower Pull Rod (2, Fig. J) to adjust the belt tension. Remove Pin (3, Fig. J) from the end of the pull rod and slip out the pull rod from the Pivot Tube (4, Fig. J). Move as many spacers as necessary to the location indicated and reassemble.
ENGINE DRIVE BELT (Engine to Main Countershaft)
Belt tension is increased by loosening the four engine mounting bolts and sliding the engine forward in the slotted frame holes. Test for the proper tension as detailed
FIGURE J
for the wing mower adjustment. When tension is correct, tighten all the bolts securely.
MAIN DRIVE BELT (Main Countershaft to Rear Drive)
Belt tension is increased by loosening the four bolts holding the Main Countershaft Housing (45, Fig. 3) and sliding the housing forward in the slotted frame holes. NOTE - It will probably be necessary to loosen or remove belt guards to reach the adjustment bolts. Also, if this belt is adjusted, it will probably be necessary to readjust the engine belt.
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