Operation Manual

en-39
9 ADJUSTMENTS
9.3 SPRING ADJUSTMENT/REMOVAL ____________________________________
Springs are factory set and should not require adjustment.
The springs are set to achieve 30kg of lift at the cutting unit
pivot pin.(A) Without this lifting force cutting units may not
lift.
To measure the spring lifting force a spring balance can be
used. First measure the weight of the cutting unit fitted to
the lift arm with the lift arm in the work position and no
spring force acting on the lift arm. The spring balance
should be attached to the cutting unit pivot pin.(A) Add or
remove spring tension on the smaller springs until a cutting
unit weight of approximately 30kg less than the weight
previously measured is achieved.
If springs are adjusted they must not go through more than 130 degrees of deflection when in work.
1. The large spring fitted to lift arms 6/7 can not be adjusted. The tension in the spring can be removed by
raising the lift arms and fitting the transport locks. The large spring is now safe to remove.
2. Remove spring retainer(B) and slide the large spring clear of the retainer plate.(C) The spring is now free
from the lift arm.
3. Fitting is reversal of removal.
The smaller springs fitted to lift arms 1,2,3,4,5,6,7 are adjustable. They should be adjusted with the lift arms
raised and the transport locks on.
4. The tension in the springs can be removed by carefully levering out the spring lock.(D)
Keep hands clear, extra care should be taken as there is stored energy in the spring.
Once the spring lock is removed there is no more tension in the spring.
5. To add or adjust the tension, use a 78mm spanner on the large hexagon spring lock nuts.(E) Turn the
spring lock nut(E) to relieve the pressure on the spring lock(D), remove spring lock(D) and turn spring lock
nut(E) one flat at a time, then replace spring lock.(D)
WARNING
Stored Energy In Lift Arms Can Cause
Serious Injury. Only Experienced
Personnel Should Attempt Cutting Unit
Removal Or Spring Adjustment.