Kwikee Level Best Manuale utente
Segment Table of Content Page
1. Erractic leg operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A. Low fluid level
B. Bleeding
C. Incorrect hose installation
2. Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A. On/Off switch
B. Ignition
C. Park brake
D. Leg extended indicator
3. Electrical wiring/connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
A. Function:
-- Inspection
-- Connections
-- Testing
-- Routing
4. Pump motor/manifold assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
A. Bleeding
B. Motor solenoid
C. By-pass valve
5. Solenoid valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
A. Functions
B. Sticking valve
C. Shorted coils
6. Control touchpad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
A. Function
B. Pump runs / valves do not open
C. Replace control
D. Auxiliary dash light and/or air dump does not work
E. Auto Level flashing red / green alternating
Service
Guide
June 22003
LEVEL BEST
Service
Guide
Products Company, Inc.
230 Davidson Avenue
Cottage Grove, Oregon 97424
(541) 942-3888 ©2003 Kwikee Products Co., Inc.
www.kwikee.com Kwikee Doc #KSG002
The Level Best Service Guide
has been organized to facilitate
quick and easy diagnostics and
trouble shooting for the most
common installation problems and
serviceable part failures.
Each segment of the Service
Guide, labeled 1-6, begins with a
diagnostics flow chart illustrating
the steps involved in the trouble
shooting process. The flow charts
are divided into alphabetical
sections that correspond to the
instructions that immediately
follow the chart.
How to use the
Service Guide:
1. Use the Table of Contents
to locate a topic area that
best matches the
symptoms.
2. Examine the flow chart at
the beginning of the
segment you select.
3. Review the system checks
and maintenance
procedures that
correspond to the
problem.
4. Follow the recommended
steps to repair the system.
5. If system failure continues
after completing the
diagnostics and
recommended repairs,
call 1-800-738-9961.
LIMITED WARRANTY
Kwikee Products Company, Inc. (“Kwikee”) warrants to the original purchaser that the Level Best® hydraulic leveling/stabilizing system is free from defects in material and
workmanship for a period of 5 years from the date of purchase. Kwikee’s obligation under this warranty is limited to the repair or replacement of defective parts returned to Kwikee's'
factory.
Kwikee will pay for the labor required to repair or replace its products on claims submitted within 2 years of the date of purchase. The warranty on repaired or replaced parts shall be
limited to the unexpired duration of the original warranty.
This warranty does not apply to products or parts that, in Kwikee’s opinion, have been subject to abuse, accident, alteration, improper installation/repair, inadequate maintenance or
deterioration due to normal wear. This warranty does not apply to electrical wiring or hydraulic hoses. The purchaser shall pay all shipping or other transportation charges for any
warranty claim.
Kwikee makes no warranty (and disclaims any implied warranty) regarding the merchantability, fitness for a particular purpose or the suitability of this product for use with other
products. In no event shall Kwikee be liable for incidental, consequential or property damage arising from the purchase and/or use of this product or any claim hereunder. This
warranty is in lieu of all other express and implied warranties. Kwikee neither assumes nor authorizes any other person to assume any liability for warranty claims not provided herein.
This warranty gives you specific legal rights including other rights that may vary from state to state. Some states do not allow limitations on implied warranties and exclusion or
limitation of incidental or consequential damages, therefore the limitations and exclusions contained herein may not apply to you.
Any questions regarding warranty claims should be directed to your dealer or contact Kwikee Products Company. Address correspondence to: Kwikee Customer Service
Representative, 230 Davidson Ave., Cottage Grove, Oregon 97424; or contact us by telephone at 1- (800) 736-9961.
NOTE: Any parts returned for warranty service/repair with wires cut will result in voiding of the warranty.
NOTE: It is important to read and understand this manual thoroughly before initiating any installation of the jacks. Kwikee Products Company, Inc., assumes no liability
for damages or injury resulting from the improper installation or operation of the Level Best® Hydraulic Leveling/Stabilizing System.
Level Best Service Guide Page 2
Level Best Service Guide Page 3
Erractic Leg Operation Diagnostics Chart
SEGMENT
1
Level Best Service Guide Page 4
SEGMENT 1Erractic Leg Operation
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 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.
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.
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 Page 5
a. Completely extend the cylinder and loosen the top hose fitting on the cylinder. You
will hear air escaping. Do not remove the fitting from the cylinder to vent this air.
Tighten the fitting when air ceases to vent and only fluid is escaping.
b. Operate the cylinder up and down several times to check for smooth operation.
CAUTION: Do not run the pump without fluid as damage to the pump
may occur. Do not engage the pump motor for periods greater than
thirty (60) seconds as motor damage may occur.
WARNING: While retracting knee acting jacks, the cam on the upper
portion of the leg will make contact with lift plate and cause the
leg assembly to swing upward. Failure to stay clear of the levelers
when the system is being operated can result in severe injury.
C Incorrect Hose Installation
1. Check hose routings and attachments at cylinders and manifold.
a. Manifold connections are labeled 1T through 4T, and 1B through 4B. “T” indicates
top hose at cylinder. Match the labeled hoses to the matching manifold connections.
LF1T to 1T; RF2T to 2T; etc. (Figure 1b.)
Left Front Extend LF1T
Right Front Extend RF2T
Left Rear Extend LR3T
Right Rear Extend RR4T
Left Front Retract LF1B
Right Front Retract RF2B
Left Rear Retract LR3B
Right Rear Retract RR4B
Figure 1a
Level Best Service Guide Page 6
SEGMENT
2Control Diagnostics Chart (1 of 2)
Level Best Service Guide Page 7
SEGMENT
2Control Diagnostics Chart (2 of 2)
A On / Off Switch (no function)
1. No function indicates that the panel is not receiving power, or the vehicle ignition
system is in the off position. See 2B Ignition. Power is transmitted to the control
panel by the multi-wire cable. Check the cable connections at the panel and at the
pump / manifold assembly. Verify that the cable is not damaged and is fully inserted into
connectors (Figure 2a.)
2. Check the controls 12-volt connection that is attached to the pump motor solenoid.
This connection is located on the same terminal as the battery cable from the vehicle
battery. Power for the control system is derived from this connection. The Level Best
control requires a minimum of 12 volts for proper operation (Figure 2b.)
B On / Off Switch
(ignition)
1. Green LED will not
illuminate when turning the
control panel “ON”. This
condition indicates a lack of, or
an inadequate ignition signal, or
a low battery. Check the source
for the ignition signal. The
ignition source must be a
constant signal with a minimum
of 12 volts.
2. The Level Best control
panel will not operate when the
vehicle ignition system is in the
off position.
Level Best Service Guide Page 8
SEGMENT 2Control
Figure 2a: Pump, Reservoir, Manifold Assembly (top view)
Figure 2b
Level Best Service Guide Page 9
C On / Off Switch (park brake)
1. Green LED flashes when turning the control panel “ON”. This condition
indicates an improper, or an inadequate signal for the park brake interlock.
Check the connection at the signal source. This is normally located at or
near the parking brake assembly. The Level Best control is designed for a
ground signal when the park brake is set. For a 12-volt signal a “mini relay”
is required to transform the signal for the control panel (Figure 2c.)
2. Check for the type of signal, Ground, 12-volt On, or 12-volt Off.
For a 12-volt On park brake signal see Figure 2c.
For a 12-volt Off park brake signal see Figure 2c.
D Leg Extended Indicator
1. With the ignition on, a green LED at the All / Up button indicates that all
leveling legs are in the fully retracted position. A flashing red LED indicates
that one or more of the leveling legs are not in the fully retracted position.
2. Flashing red LED. Visually check to verify leveling leg positions. If legs
are fully retracted, check the leg position wiring and switches (Figure 2d.)
3. Retest panel, if the LED continues to flash red, check leg position switch
function. Separate the wiring connector at the switch. Using an ohm meter
check the wires leading to each of the leg switches. These wires should
show continuity when the legs are fully retracted. If the wires do not show
continuity replace the defective leg switch (Figure 2d.)
Figure 2c
Figure 2d: Rear view of retracted jack as seen
through foot pad
SEGMENT
3Electrical Wiring/Connections Diagnostics Chart
Level Best Service Guide Page 10
Indice
