MTZ 1220.1, Operator'S Manual

Page: 108 / 244

MTZ 1220.1/1220.3 Section D. Construction and Operation
D60
Adjustment of the hydroficated hook control mechanism and peculiarities of ad-
justment with the electro-hydraulic regulator of the RHL control
ATTENTION! Prior to beginning the work with
semi-trailers as well as prior to each adjust-
ment of the position sensor (in case of mount-
ing of the EHR) determining the position of the
lift levers (1) and (2) (see Fig. E-38), it is nec-
essary to turn out the screws (3) (see Fig. E-
39) from the shackles (4) to ensure the free
travel of the levers to avoid breakage of pins
(5) of the angle braces.
If the tractor is equipped with the EHR, the po-
sition sensor shall be set in the following order:
Screw in the sensor (12) with applying the hand
torque until full taking up of its travel (up to
the stop) and then screw it out by 0.5...1.0
revolutions and stop by means of a locknut
(with applying the hand torque too).
To adjust the control mechanism, proceed as
follows:
1. Lift the lift levers to the maximum possible
height, which can be determined by the posi-
tion sensor and position handle of the dis-
tributor, adjust the length of the lifting bars by
means of the screws (3), turn in the screws
(3) into the shackles (4) until the heads of the
screws rest against the surfaces of the shack-
les 6 and stop them with locknuts. When it will
be done, the grips (7) shall pass under the
hook axle 8 without striking against it.
2. Set the pawl
Е of the handle (10) onto the
bracket (11).
3. Ensure the clearance «
Д » between the grips
(7) and the hook axle (8) when lowering and lift-
ing the same by adjusting the length of the rod
(9).
4. Lift the levers to the top position and move the
handle (10) down. When it will be done, the grips
(7) shall be positioned under the hook axle.
5. Make sure that the grips ensure the locking of
the hook in the working position when lowering
the levers.
Fig. E-39