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36
Chapter 1V—Hydraulic System
CONSTANT
DRAFT SPRING ADJUSTMENT
NUT
CASTLE NUT
SELF LOCKING
NUT
c SPRING
ADJUSTMENT
BOLT
4
f
POSITION
CONTROL
SPRING
POSITION CONTROL
SPRING
LOCK NUT
POSITION
INDICATION
MARKS
OM-416
Fig. 29—Hydraulic Unit in Position for Adjustments
(2) ADJUSTMENT
OF
FORCE
REQUIRED
TO
MOVE
HYDRAULIC
TOUCH
CONTROL
LEVER.
This is accomplished
by tightening or loosening the nut on the end of the hydraulic touch
control lever shaft (fig. 17). Tightening the nut increases the force
required to move the lever. It should be set so that it requires a pull
of 4 to 5 pounds on the knob to move the lever.
b. Internal Adjustments. The internal adjustments have been
carefully made
at the factory.
However,
it may
be necessary
to
readjust the hydraulic unit after an overhaul. These internal adjust-
ments must be made before the unit is installed on the tractor.
The first step in making the internal adjustments is to check the
two external adjustments as outlined above, and adjust if necessary.
(1) Support the unit in a vise in a vertical position with the control
spring down as shown in fig. 29.
The lift arms
must be supported in the fully raised position as
indicated by the marks on the lift arms and housing (fig. 29).
§ 143 b. (1)
3730-47]
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