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NATIONAL 68" SR & DL TRIPLEX – CE
®
17
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.
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
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.
FRONT
OF
MACHINE
NOTE
Guards removed
to show detail
FIGURE J