Bondioli & Pavesi SFT Manual Del Usuario página 20

ENG
LR – AUTOMATIC TORQUE LIMITER
42
This device interrupts the transmission of power when the torque exceeds
the setting. To automatically re-engage the device, slow down or stop the PTO.
This device is sealed - no additional lubrication is required.
43
GE – SHOCK ABSORBING CLUTCH
Absorbs shock loads and vibrations, and smoothes transmission of an alter-
nating or pulsating load.
No maintenance is required.
FRICTION TORQUE LIMITERS
Check the condition of the friction linings when installing the clutch or after periods
of storage.
• If the edges of the clutch plates are exposed (see fig. 44) the clutch is either type
FV with Belleville spring or FFV with helicoil springs. Measure and record the spring
height as shown in figure 45. If the clutch plates are covered by a metal band (see
figure 46) the clutch is type FT.
If the clutch discs are exposed and the bolts have cap nuts, the clutch is of
the FK type.
Following seasonal use, relieve the spring pressure and keep the clutch in a dry
place. Check the condition of friction disks and restore spring pressure before
using the clutch. If the clutch overheats due to frequent or prolonged slipping,
consult your equipment dealer or manufacturer, or your local Bondioli & Pavesi
representative.
44
FV - FFV FRICTION TORQUE LIMITER
The torque transmitted to the machine is limited by allowing the clutch plates
to slip relative to each other.
Torque peaks or short duration overloads are limited when the clutch is used and
adjusted properly.
It can be used as an overload clutch, or to help start implements with high inertial loads.
The setting can be adjusted by modifying the working height of the springs.
45 The torque setting of friction torque limiters FV and FFV is adjusted by incre-
asing or decreasing the height "h" of the spring.
To increase / reduce the torque setting, screw / unscrew each of the eight nuts
by 1/4 of turn and check for proper operation. Repeat the procedure if necessary.
Avoid excessive tightening of the bolts - implement, tractor, or driveline damage
may occur.
FT - FK FRICTION TORQUE LIMITERS
46
The torque transmitted to the machine is limited by allowing the clutch plates
to slip relative to each other. Torque peaks or short duration overloads are limited
when the clutch is used and adjusted properly. It can be used as an overload
clutch, or to help start implements with high inertial loads. The FT has a metal
band around its circumference. The bolts should be tightened until the metal band
around the circumference of the clutch touches the spring, then loosen each nut
by 1/4 turn. Avoid excessive tightening of the bolts - implement, tractor, or driveline
damage may occur.
The FK clutch has bolts with cap nuts. The spring compression is correct
when the nuts are fully screwed on. Use only special B&P bolts and nuts.
20