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Chapter 1V—Hydraulic System
CONSTANT
DRAFT
CONTROL
SPRING
UFT ARM,
y
'
geo
ARM
Fig. 21—Install Constant Draft Control Linkage
c. Assembly.
The hydraulic
unit may
be assembled
by sub-
assemblies.
The
sequence
of assembling
subassemblies
onto
the
hydraulic unit cover may be changed from that given below.
(1) ASSEMBLE
LIFT ARMS AND SHAFT.
Hold the ram arm
in place in the hydraulic unit cover, and install the shaft. Install the
two bushings (fig. 20) on the shaft. Install the two lift arms on the
shaft, and secure
each arm
to the shaft with a flat washer, lock
washer, and two cap screws. The lift arms should be tightened enough
to prevent end play of the shaft. The lift arms should not bind to the
extent that they will not settle under their own weight.
(2) ASSEMBLE
CONTROL
LINKAGE.
Install the draft con-
trol linkage as shown in fig. 21. Place the position control linkage on
the hydraulic touch control lever shaft, and insert this assembly in
the hydraulic unit cover. Install the control arm on the draft control
linkage and the hydraulic touch control lever shaft. Secure the con-
trol arm in place with a castellated nut and cotter pin.
Position the three-cornered plate with the pin at the top on the
hydraulic unit cover and secure with three cap screws. Install a new
felt washer in the control spring seat. Install the control spring seat,
control spring, and yoke (fig. 18). Mount the quadrant, using a new
gasket, on the hydraulic unit cover. Install a new friction disk and
§ 141.
c. (2)
3730-47J
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