SaMASZ XT 390, Operator'S Manual, Page: 33 / 48

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OPERATOR'S MANUAL REAR DISC MOWER XT
7.2. Controlling condition of knives and holder pins
WARNING!
Condition of knives and holders should be checked each time before
commencing any operation. Damaged or worn elements pose danger of
throwing and are as well health and life threatening.
WARNING!
When operating pay attention whether there are no excessive vibrations of the
mower which may indicate that the disc(s) operate with 1 cutting knife attached
only. Long-term cutting with insufficient amount of knives will cause permanent
damage to the cutterbar, not eligible for a repair under the warranty. When
operating check knives for completeness.
All knives should be of the same length and weight. Replace them, if necessary, only in sets of
the same length and weight.
Knife holder pin cannot be worn more than provided in Fig. 24 . Too big a pin wearing is enough
for a knife holder to be replaced.
Fig. 24. Permissible wear of knife mounting in disc a) knife mounting M12
b) knife mounting M12 with claw
7.3. Replacing knives and holder pins
Worn and/or damaged knives must be replaced immediately as shown in Fig. 25 . Knives should
be replaced in pairs so proper disk balance is kept. On replacing knives pin of knife’s holder shall be
examined carefully. If holder's pin is worn ( Fig. 24 ), both holders or the pins must be replaced with new
ones (tightening torque 130 Nm / 96 ft-lb ( Fig. 26 )).
WARNING!
When replacing knives the engine must be off and the cutterbar must lie on the
ground. The PTO shaft connecting the mower to the tractor must be off.
Discs should be perpendicular to cutterbar.
a) b)