User's manual
CIRCULAR SAW - PT
- 17 -
6.3.
Transmission v-belts
Fig. 9. Adjusting tension of V-belts
In order to perform adjustment of V-belts' tension follow the instructions:
1.
Untighten nuts (1), and the remove bolts (2) (Fig. 9). To facilitate bolts (2) removal, slightly
turn the tensioner with key (3) no. 36 counter-clockwise.
2.
In order to tension the belt turn the tensioner with key (3) counter-clockwise and position, so
as it is possible to put back bolts (2). Then check tensioning of the belts according to item
6.2. The tensioner can be either tightened or loosened, if necessary.
3.
Assemble the tensioner in a reverse order as the procedure given in step 1 above, paying
attention to bolt tightening torques from Tab. 4.
7.
DEFECTS AND THEIR REPAIR
Tab. 3. Defects, causes and their repair
Default
Cause
Repair method
Circular saw fails
to cut
Circular blades are blunt
Sharpen blades / replace with new
ones
Too low PTO rpm
Switch up to 1000 rpm
Reduce to the lowest gear and speed
up
Seized bearings
Replace circular saw bearings
Worn, damaged hydraulic
engine
Recover hydraulic engine or replace
with new one
Low rpm rate at
circular blades
Improper tractor's PTO rpm
engaged
Switch tractor's PTO to 1000 rpm
Seized bearings
Replace circular saw bearings
Low motor rpm
Reduce to the lowest gear and speed
up
Worn bearings
Replace with new ones
Plays on bolt connections
Tighten bolts
Sliding v-belts
Tighten belts or replace with new
ones
Contamination between hub and
resistance disk
Check for smooth rotation, and if
resistance is felt, dismantle and
remove the contamination