Removal And Installation - Hudson 480-490 Series Service Manual

FIGURE 102
Figure No. 102 is a side view of the motor and pump
assembly.
8. Fluid Level marker
9. Rubber cushioned mounting brackets
10. Ground strap terminal
11. Pressure relief valve
MAJOR HYDRAULIC UNITS,
480-490 SERIES

REMOVAL AND INSTALLATION:

NOTE: Before removing any hydraulic unit, two pre-
cautionary steps are to be taken.
1. All hydraulic fluid must be removed from the system.
2. Disconnect negative battery cable at battery.
CAUTION: This fluid is extremely injurious to
painted or lacquered surfaces, and it is highly inflam-
mable. Sparks from accidental grounding of electrical
connections may ignite the fluid.
FIGURE 103
To remove hydraulic fluid, raise the car on a hoist and
remove cover plate (A) from the bottom of the well con-
taining the Motor and Hydraulic Pump Assembly. See
Figure 103. Remove the reservoir bail (C) and the reser-
voir (D), and empty the contents into a clean dust-free
container
With a helper in the car to operate the top, hold the empty
reservoir in position on the bottom of the motor and pump
assembly so that the fluid pick-up is two to three inches
from the bottom of the reservoir. This prevents fluid being
drawn back into the system during the bleeding operation.
Using the dash mounted top operating button, move the
top up and down manually until all fluid is expelled from
the system. Top must be moved slowly and steadily to
prevent excess strain on top parts or top operating cylinders.
When all fluid is out of the system, empty the reservoir and
replace it on the pump.
Before disconnecting any hydraulic lines, place clean rags
under the connection to soak up any fluid that may drip
from the line when the connection is broken.
When all fluid is out of the system, empty the reservoir and
replace it on the pump.
Before disconnecting any hydraulic lines, place clean rags
under the connection to soak up any fluid that may drip
from the line when the connection is broken.
BODY MANUAL 71