Rev: 05.26.23 Page 14 CCD-0007708
Purging Hydraulic System
Do not attempt to purge this system without the front end of the 5th Wheel safely supported. Doing
so could result in death or serious bodily injury.
NOTE: Refer to TI-118, Basic Purge Procedure for Hydraulic Pumps.
NOTE: Use a purging machine to clear hydraulic fluid of air and foam.
1. Start with all hydraulic components in the fully retracted position, meaning all jacks, landing gear,
stabilizers and slide-outs brought back inside the trailer as if it were ready to travel.
2. Find the hydraulic pump location and note the amount of fluid currently in the reservoir. The fluid level
should be about 1/4” from the top of the reservoir and no more than 1/2” from the top.
NOTE: All valves must be placed in the override position. This can be accomplished by gently turning the
hex screw in until it stops.
3. Connect Lippert supplied purge machine to the up and down ports of the pump.
4. Fully extend and retract all hydraulic components 3 times.
5. Return valves to the closed position by backing out the hex screw and gently seating it. Do not over
tighten the hex screw in either direction.
6. Extend Hydraulic Landing Gear until footpads contact the ground, extend rear jacks to touch the
ground, extend all Slide-Outs. Retract all Slide-Outs immediately, retract rear jacks and then retract
Hydraulic Landing Gear.
NOTE: Purging of the system should take place in the chassis prep area prior to setting decking to observe
any leaks or improper function of the system.
Operation
Prior to Operation
The leveling system shall only be operated under the following conditions:
1. The trailer is parked on a reasonably level surface.
2. Make sure all persons and property are clear of the trailer while the LCD 5th Wheel Leveling system is
in operation.
3. Make sure the battery of the trailer is fully charged prior to attempting to operate the system. The
automatic leveling system requires a minimum of 12V DC from the battery for operation.
Touchscreen Operation
1. To open the touchscreen, place a finger underneath the latch (Fig. 14A) and pull outwards. The door
will unlatch.
2. Upon waking the touchscreen for use, a PIN will need to be entered.
A. The default PIN is 5241. This can be found on the controller label (Fig. 9).
3. To close the touchscreen, close the door and press the latch (Fig. 14A) toward the housing. The latch
will snap closed.
NOTE: The buttons on the touchscreen can be operated by pressing on the screen, or pressing and
holding on the screen. The touchscreen is a pressure-responsive type. This allows the touchscreen
to be operated while wearing gloves, and protects the leveling system against accidental operation.
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