National Mower 68 SR 사용자 설명서

®

27

68OM-06/03

Engine will not start

Turn ignition switch to on

Ensure that there is sufficient gasoline (petrol) in the tank

Make sure safety switches are making contact and mowing clutch is in

neutral

Look for a loose wire on ignition or spark plug wire not connected

Interlock system inoperative—check wiring, see "Electrical Diagrams"

Operator must be positioned on seat to depress safety switches

(Model 68 DL only)

Mower will not move

Differential gear selector must be in one of the drive positions

Engine drive clutch must be engaged

Drive belts too loose (see "Drive Belt Tension" in Maintenance section)

Visually check to see that pulleys are not slipping on shafts

If everything above is OK, check for a damaged gear(s) in the differential
gear  box

Mower will not stop

Ensure that the main clutch is disengaged (brake will not stop engine)

Brake adjustment or service may be needed.

Cutting units will not turn.

Clutches may not be engaged

Look for anything that could be jammed between the reel and the bed knife

Drive belts or drive chain may need tightening

Visually check that both the drive pulleys and the shafts are rotating

Cutting units turn but

Reel bed  knife position may be out of adjustment (see "Reel to Bed Knife

 will not cut

Adjustment" in Maintenance section)

Drive belts or drive chain may need adjustment.

Visually check that both the drive pulleys and the shafts are rotating

Cutting units will not stop

Disengage all clutches

 turning

Uneven  cut

Set height of cut to the same height on each cutting unit (see "Cutting Height

Adjustment" in Operation section of this manual.)

Check to see if any part is bent

Something may be jammed in cutting unit pivots and/or lift pivots, preventing

the cutting units from floating