Advertisement
13-28
FOLDING TOP
RESERVOIR TUBE
Disassembly From Motor and Pump Assembly
1. Remove motor and pump assembly from body.
2. Scribe a line across pump end plate and reser-
voir tube to insure a correct assembly of
parts. See Fig. 13-62.
3. With a straight-bladed screwdriver, remove
reservoir filler plug.
FROM TOP
OF CYLINDER
FROM
RESERVOIR
TO BOTTOM
OF CYLINDER
1725
4. Drain fluid
from
reservoir
into
a clean
container.
5. With suitable tool, remove bolt from end of
assembly and remove reservoir tube. Note
sealing rings around bolt and between end of
reservoir tube and pump cover plate assembly.
Assembly To Motor and Pump Assembly
1. Position sealing ring on pump and assembly
reservoir tube to pump according to scribe
marks.
NOTE:
Bracket assembly on tube should be
located at outer end when tube is assembled to
pump.
2. Install and tighten attaching bolt.
3. Place unit in horizontal position and fill with
fluid until fluid level is within 1/4" of lower
edge of filler plug hole.
RESERVOIR FILLER PL
Fig. 13-62 — Hydro-Lectric Motor And Pump Assembly
Fig. 13-63—Operation Of Pump To Raise Top
OPERATION OF FOLDING TOP
When the control switch is actuated to the "up"
position, the battery feed wire is connected to the
red motor lead and the motor and pump assembly
operate to force the hydraulic fluid through the
hoses to the lower ends of the double-acting cyl-
inders. The fluid forces the piston rods in the
cylinders upward, thus raising the top. The fluid
in the top of the cylinders returns to the pump for
recirculation to the bottom of the cylinders. When
the control switch know is actuated to the "down"
position, the feed wire is connected to the dark
green motor lead and the motor and pump assembly
operate in a reversed direction to force the hy-
draulic fluid through the hoses to the top of the
cylinders. The fluid forces the piston rods in the
cylinders downward, thus lowering the top. The
fluid in the bottom of the cylinders returns to the
pump for recirculation to the top of the cylinders.
OPERATION OF PUMP ASSEMBLY
The rotor type pump assembly is designed to de-
liver a maximum pressure in the range of 340 psi
to 380 psi. The operation of the pump assembly
when raising the top is as follows:
1. Raising the Top.
When the red motor lead is
energized the motor drive shaft turns the
rotors clockwise as indicated by the large
arrow in Figure 13-63. The action of the pump
rotors forces the fluid under pressure to the
bottom of each cylinder forcing the piston
upward. This action causes the fluid above the
piston in each cylinder to be forced into the
pump, which recirculates the fluid to the bot-
tom of the cylinders. The additional fluid re-
quired to fill the cylinder due to piston rod
displacement is drawn from the reservoir.
2. Lowering the Top. When the green motor lead
is energized the motor drive shaft turns the
Advertisement
