Bigfoot 8k Operating instructions

SQUARE HYDRAULIC JACK
INSTALLATION & OWNER’S MANUAL
Quadra Manufacturing
Bigfoot Leveling Systems
305 US 131 SOUTH WHITE
PIGEON, MI 49099
800-752-9815
Visit Our Site @
BIGFOOTLEVELER.COM
Version #1122

THEREARE SIX KITS AVAILABLE:
12k Standard Single Point
One 12k Jack, One Pump, and Weatherproof Control Box.
12k Wireless Single Point
One 12k Jack, One Pump, and Wireless Key Fob & Emergency Switch Inside Tank.
12k Standard Slave Kit
Two 12k Jacks, One Pump, and Weatherproof Control Box,
NO side to side leveling.
12k Wireless Slave Kit
Two 12k Jacks, One Pump, and Wireless Key Fob & Emergency Switch Inside Tank,
NO side to side leveling.
12k Dual 2PT Kit
Two 12k Jacks, Two Pumps, and Weatherproof Control Box,
Jacks can run individually, so side to side leveling can be achieved.
8k Standard Single Point
•One 8k Jack, One Pump, and Weatherproof Control Box.
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SQ824
#M4081
LARN STYLE BRACKETS
24" STROKE
8k-lb LIFT CAPACITY
MEDIUM TANK ASSEMBLY
STANDARD #M26850
MANUAL OVERRIDE #M26855
7" FIXED FOOTPAD
4" OUTER TUBING
'B' BRACKETS (4")
QTY: 5 PER JACK
#M28930
'B' BRACKETS SLIDE FOR
ADJUSTABLE WIDTH
3.6" TO 5.5" BEAM
1/2" G8 HEX BOLT x 5.5" TO 6.5" LONG
1/2" G8 HEX NUT
1/2" G8 LOCKWASHER
QTY: 2 OF EACH PER JACK
7/16" G8 HEX BOLT x 1.5" LONG
7/16" G8 HEX NUT
7/16" G8 LOCKWASHER
QTY: 3 OF EACH PER JACK
7/16" G8 HEX BOLT x 1.75"
7/16" G8 HEX NUT
7/16" G8 LOCKWASHER
QTY: 4 OF EACH PER JACK
DRILL 1/2" CLEARANCE HOLE THROUGH
TRAILER FRAME BULKHEAD OR BEAM
ATTACH JACK USING TWO 1/2" BOLTS
(EITHER IN 5.5" OR 6.5" LENGTHS)
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RETRACT PORT
1/4" JIC
MEDIUM TANK ASSEMBLY
STANDARD #M26850
MANUAL OVERRIDE #M26855
3/8" G5 HEX BOLT x .5" LONG
3/8" G5 LOCKWASHER
QTY: 2 EACH PER PUMP
TAB BRACKET
QTY: 2 PER PUMP
#M28725
EXTEND PORT
1/4" JIC
7/16" G8 HEX BOLT x 1.5"
7/16" G8 HEX NUT
7/16" G8 LOCKWASHER
QTY: 2 EACH PER PUMP
TANK ASSEMBLY
RETRACT PORT
SQI-24
STANDARD LARN
#M4024
"B" BRACKETS
QTY: 4 PER JACK
#M28930
DRILL 1/2" CLEARANCE HOLE THROUGH
TRAILER FRAME BULKHEAD OR BEAM
ATTACH JACK USING TWO 1/2" BOLTS
(EITHER IN 5.5" OR 6.5" LENGTHS)
7/16" G8 HEX BOLT x 1.75"
7/16" G8 HEX NUT
7/16" G8 LOCKWASHER
QTY: 4 EACH PER JACK
1/2" G8 HEX BOLT x 5.5" to 6.5" LONG
1/2" G8 HEX NUT
1/2" G8 LOCKWASHER
QTY: 2 EACH PER JACK
"B" BRACKETS SLIDE FOR
ADJUSTABLE WIDTH
3.6" TO 5.5" BEAM
PIVOTING FOOTPAD
3

Mounting Instructions (SEE DIAGRAM PAGE 3)
Attach the “B” brackets (4” long angle brackets with slots in them, shipped loose) to the
backside of the jack’s plates using the 7/16”hardware, two 7/16”bolts per bracket is
OK, B-bracket face with slot to back of jack mounting plate for adjustability. Brackets
will form a clamping design to the trailer frame’s bulkhead (vertical, rectangular frame
section exposed on front of trailer). If no bulkhead, bolt jack directly to frame and
bypass the “B” brackets all together with supplied 7/16” bolts (4 per jack minimum) or
two to four 1/2" or 5/8”bolts (not included).
Level trailer (typical ride height) and support front of the trailer with jack stands.
Unbolt and remove existing jack (and brackets).
Set the Bigfoot jack temporarily to desired placement.
(Recommended Ground Clearance: Minimum of 8 inches, typically match old jack height)
Make sure new jack is level then mark placement of mounting holes on the frame also
called the bulkhead (rectangular frame).
If existing holes in bulkhead do not match the Bigfoot jack’s hole pattern, drill holes
using a 17/32 drill bit.
Then bolt the jack assembly to the bulkhead frame of the trailer using the 5 ½” & 6 ½”
long bolts (½” hardware). Tighten to 70 ft/lbs.
Plumbing of hydraulic lines:
1pt or Drive Leg: If the tank hoses are not already connected to the leg, the left fitting
on the tank assembly goes to the bottom fitting on the Bigfoot Jack, (the longest hose.)
2pt Slave Legs: Install “T” fittings at the drive leg’s ports, run the short hoses from the
tank assembly to the “T” fittings, run the longer hoses to the slave or driven leg.
Recommended Hydraulic Line Bleeding Process:
Prior to hooking up both slave leg hydraulic lines; install the retract line only, leave the
extend line un-attached at the slave leg and place the line in a container (the same container
used for filling the reservoir works well). After filling the reservoir and installing the controls
and power (may be temporary), press the extend button on the control to extend the jacks
for a moment until the container starts to be filled with the fluid from the slave leg’s extend
line. This means all the air is removed from that line and cannot be internally trapped in the
system. Install the extend line to the slave leg and continue to run the jacks to full extension
and leave for a moment (typically 15 minutes) and back down again. After doing so, top off the
hydraulic reservoir and process complete!
4

Tank Assembly Diagram
Fill with 2 quarts Dexron III ATF (automatic transmission fluid) only!
Replacement Assembly Standard motor: #M26850
Replacement Assembly Manual Override motor: #M26855
98oz. PLASTIC RESERVOIR
#M25507
5

Final Electrical Steps…
Hydraulic jack requires 12 volt battery; make sure you use at least a 4 gauge battery
cable for the power to the jack.
Remove plastic cover from pump assembly (if installed).
(Standard kits) Mount weather proof control box assembly in a convenient location
making sure to allow enough wire harness to reach the pump assembly.
Most trailers have the battery mounted on the front of the trailer in a box; install the 80
amp breaker (if equipped) using the self tapping screws in-line somewhere between the
jack and the battery.
Hooking up the breaker: Using the battery cable (if equipped); attach one end of the
cable to the bottom solenoid on the lug with the copper strip. Route the cable through
the grommet holes in the marked AUX then attach the other cable (if equipped) to the
circuit breaker post marked BAT and route the cable to the battery (DO NOT CONNECT
UNTIL THE REST OF THE TANK WIRING IS COMPLETE)
(Standard kits) Route the harness from the switch box through the grommet on the back
of the pump. Connect the green wire with the white strip to the small post on the top
solenoid (make sure to use the crimp on push on connector if supplied). Next, connect
the solid green wire to the small post on the bottom solenoid. You may now connect the
battery cable to the battery.
In the event the Tank Assembly is not attached or mounted to steel; it is necessary to
attach the AUX Ground from tank assembly to frame. (If tank Assembly is mounted to
steel, the ground is reached thru the tank body and frame of vehicle.)
At this point add fluid (ATF) to the pump (red fill cap) make sure you fill the tank so that
the fluid is ¾” below the top.
Then you must press the extend button and fully extend the jack(s) until it reaches full
extension. Let is set this way for 30 minutes, this bleeds the air from the lines.
Once that is done lower your system and enjoy your brand new BIGFOOT LEVELER.
6

7

8

9

2pt Dual Control…
98oz. PLASTIC
RESERVOIR
#M25507
10

MANUAL RETRACT &
TOGGLE SWITCH WIRE DIAGRAM
MANUAL RETRACT (if equipped)
If your jack is equipped with manual retract there will be a 6” hex bit in with
your kit, there will also be a hole in the top of your tank assembly to access
the drive at the top of the pump.
Use a drill to retract or extend cylinder, this is not a quick operation but will
work in case of emergency.
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Troubleshooting Guideline
#1 issue is poor battery connection or low charge, so check that first!
The jack runs for a few seconds, then stops…
The battery is weak or the battery capacity has diminished.
An auxiliary ground is needed from the tank assembly to the trailer’s frame.
The jack only runs in one direction…
Check battery voltage.
Check all wire connections & for proper plumbing.
Press the switch but nothing happens…
Check both positive & negative 12V connections.
Check for full charge of battery.
Check that tank assembly has proper ground.
Check wiring connections.
The jack is jerky when retracting…
There may be air in the system, see bleeding procedure earlier in the booklet.
Low fluid level (Must be 3/4” below top of reservoir)
Incorrect hose installation.
To purge system, add necessary fluid and extend/retract leg completely.
Cylinders “creep” down when not in use… Check fluid level, OR Bleed System (air in the system)
Hydraulic Fluid on footpad or on ground around cylinder… Loose fitting or broken hydraulic line.
Cylinders “creep” down or don’t hold pressure when lifting/holding coach…
Air in the system, see bleeding procedure.
Check fluid level, should be ¾” below top of reservoir with jacks retracted completely, ATF Dexron III.
Check for leaks in hydraulic lines/fittings… if lines damaged, replace.
Possibly plumbed backwards
Relief Valves have failed on pump motor… replace motor/tank assembly
Hydraulic seal failure… replace/return cylinder OR seal kit
Plastic Foaming of fluid or overflow in reservoir….
Check fluid level of reservoir with legs retracted (should be ¾”-1” below top).
Semi-Annual Service Required: Bleeding the system
Every six months, extend both jacks completely and leave for a
minimum of 30 minutes, then return to standard position.
This is our basic bleeding process, if you have issues with air in the system
(Lifting or holding trailer weight issues) see below for a more detailed process…
1. Disconnect extend hose fitting on the slave jack (jack without pump).
2. Place hose in bucket, run EXTEND on control until smooth fluid flow, stop.
3. Re-connect extend hose fitting on slave jack.
4. Extend both jacks completely (listen to pump), leave for 30 minutes, retract to
normal position.
12

Warranty Guide
1 & 2pt Square Leg Systems:
Limited 5 years cylinders, 2 years on parts and 1 year on labor.
Should the product be defective due to workmanship and/or material flaw, we will repair or replace the defective
material. Core charges and refunds may apply for specific components.
Quadra is NOT responsible for:
Freight on warranty parts.
Replacing footpads, bolts, or fluids lost as a result of failure to maintain the system (Loose footpads
should be tightened at owner’s expense).
Damages caused by abuse, misuse, negligence, misapplication, error of operation, accidental
or purposeful damage or faulty installation,including but not limited to hoses, fittings & wiring
components.
Liability for loss to the vehicle, or apparatus or property, loss of time, manufacturing costs, labor,
material, loss of profits, consequential damages (direct or indirect).
For transportation to and from a service center, onsite service calls to or from the customer, damage
from road hazard, loss of salaries, commissions, lodging, towing charges, bus fares, car rentals, fuel
expense, telephone charges, inconvenience compensation while repairing or replacing a defective
part or material.
This warranty voids all previous issues. Effective date: 1/21/2022
OWNERSHIP MUST BE REGISTERED WITHIN 30 DAYS FROM THE DATE OF PURCHASE TO
ACTIVATE WARRANTY.
Prior to any work being done an authorization number must be obtained by calling
269-483-9633 for Warranty Parts or Service Labor. For full warranty transcript just contact us!
Service labor based on a flat rate schedule determined by Quadra for authorized work performed will
be reimbursed. This will eliminate much diagnostic time and avoid refusal of unauthorized claims. Many
problems may be resolved by contacting a Quadra service representative.
Credit card payment arrangements at time of order will be nullified upon our receipt of your defective
parts. All returned parts need to have the repair authorization number and be received within 30 days of
original order to avoid charges.
Provide the system serial number here .
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