I T L S E R V I C E M A N U A L
H-21
HYDRAULIC SYSTEM
In case of complete disassembly of the rockshaft it is necessary to make the follow
adjustments:-
1. Adjustment of Control Valve Sensitivity
Ÿ Place The lift arms with the weight applied about the middle of the stroke so that the control valve is in the neutral
phase.
Ÿ Operate now on Control Valve.
Ÿ At that point screw again "B" till the movement of arms stops, then screw again for lA of turn and lock the screw "B"
with the nut "A".
Ÿ Unscrew a little the nut "A" and then unscrew the screw "B" till the arms start to jerky.
Ÿ In this way the Control Valve is adjusted at the maximum sensitivity.
The adjustment is carried out in order to establish the maximum raised position, of the rockshaft lifting arms.
2. Adjustment of Position Control Lever
Completely lower the arms and apply a weight.
Loosen the fastening screw "1" so as to free the lever "L" from the position control shaft "2" Raise the lever "L" all the
way toward backstop "F" without rotating shaft "2".
With a 13mm open end wrench, rotate slowly in an anticlockwise direction the position control shaft "2" so as to raise
the arms. Continue the rotation until reaching the degree of 75° º-2° (the maximum raised position).
Take care to maintain the position control shaft "2" blocked and the lever "L" against the backstop "F".
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