Segment; Erractic Leg Operation; Low Fluid Level; Bleeding - Kwikee Level Best Service Manual

Figure 1a
CAUTION: Never run
the pump without
fluid. Damage to the
pump will occur.
DO NOT engage the
pump for periods
greater than sixty
(60) seconds. Periods
greater than 60 second can
overheat the motor andmay
cause permanent damage to
the pump motor.
Level Best Service Guide
1

Erractic Leg Operation

SEGMENT

A Low Fluid
1. Check system for a low fluid level. This check should only be made when jacks are
in the fully retracted position.
a. Check the fluid level by removing the breather cap on the reservoir tank. When full,
the fluid level should be within 1" of the top of the tank at the fill opening (Figure 1a.)
2. Fill reservoir to within 1" of the top of the tank at the fill opening. Use transmission
fluid only, we recommend the use of Dexron III. Do not mix fluids.
b. With the reservoir filled and the fittings checked, turn the system on at the control
panel and begin to extend one of the cylinders furthest from the pump. When air is in
the system the valves at the manifold will not seal and the cylinders will begin to extend
erratically. As the hydraulic fluid begins to purge the air from the system, the manifold
valves will seal and the jacks will begin to act independently.
c. When the reservoir begins to run low on fluid, the resistance of the fluid within the
pump lessens and the sound of the pump increases in pitch. Retract the legs and
replenish the fluid in the reservoir at this time.
d. Continue to extend the cylinder until it reaches the end of its stroke, then follow by
retracting all of the cylinders. With air in the lines, the cylinders will emit squeaking and
humming noises and move in a jumpy manner; as air is purged from the system the
cylinders will move in a smoother quieter manner. It may be necessary to extend and
retract each cylinder several times to completely purge the lines and cylinders of air.
e. When the system has been bled fully, retract all of the cylinders check the fluid level
in the reservoir. With all cylinders retracted the fluid level should be within 1" of the top
of the reservoir at the fill opening.
2. Manually Bleeding. Most cylinders will bleed themselves, however if you have diffi-
culty with a particular cylinder during the bleeding process, it is possible to manually
bleed a cylinder.
B

Bleeding

1. Air in cylinders and hydraulic lines
will cause erratic system operation.
a. Prior to initiating the bleeding
process, verify that all the fittings on
the cylinders and the manifold have
been tighten to 50-150 in/lbs. Also
check that all the swaged hose cou-
plers are tighten to the fitting s at 50-
150 in/lbs. The entire system must be
filled with hydraulic fluid during the
bleeding process. Check that the
cylinders are fully retracted and fill the
reservoir.
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