Mudd-Ox FORT MAC 85 HP User manual

MUDD-OX, INC.
WWW.MUDDOX.NET
8525 W 750 N
SHIPSHEWANA, IN
260-768-7221
MADE IN THE USA
FORT MAC 85 HP OWNER’S MANUAL

A Message from Mudd-Ox Inc.
Thank you for choosing the Mudd-Ox as your new amphibious ATV.
We began designing the first Mudd-Ox in 2005, spending years testing and developing the ultimate amphibious vehicle. The first pro-
duction machine rolled off the line in 2008 and was shipped to Australia. Since then, we have expanded our model lineup to include the
Mudd-Ox XL, Fort Mac, and Vengeance to suit all your outdoor needs. Our journey has continued to be full of adventure.
Safety is the number one concern at Mudd-Ox Inc. Please be sure to read and follow the operation manual to ensure the safety of yourself
and others around the Mudd-Ox.
Mudd-Ox is proudly made in the USA. Our headquarters and manufacturing facility are located near the historic town of Shipshewana,
Indiana. We welcome everyone to come visit our facility and enjoy the local beauty that is rural Indiana.

Identify Your Mudd-Ox...........................................................................................................................................................1
Specifications............................................................................................................................................................................3
Warranty......................................................................................................................................................................................5
Safety.............................................................................................................................................................................................8
Instrument Panel.....................................................................................................................................................................11
Drive the Mudd-Ox................................................................................................................................................................15
Operation....................................................................................................................................................................................17
Accessing the Mudd-Ox ....................................................................................................................................................23
Track Installation ...................................................................................................................................................................31
Towing .......................................................................................................................................................................................32
General Maintenance .........................................................................................................................................................33
Bolt Torque Specs ................................................................................................................................................................33
Storage ......................................................................................................................................................................................47
Parts Manual ...........................................................................................................................................................................48
Dimensions .............................................................................................................................................................................67
Contact Us ...............................................................................................................................................................................68
Table of Contents

1
Identify Your Mudd-Ox
PIN Plate
Every Mudd-Ox has its own unique identification plate. It notates the Model and Product Identification Number (PIN). This infor-
mation is vital for identifying each individual Mudd-Ox and obtaining a state-issued title. Do not remove the PIN plate from the
Mudd-Ox.
Locating the PIN
On the interior of the Mudd-Ox in front of the parking brake handle locates the PIN plate. It is visible without removing any compo-
nents, however removing the lower seat is recommended for best visibility.

2
Identify Your Mudd-Ox Cont.
Document the Information
Write down the Model and PIN information just as it displays on the PIN plate to document your individual Mudd-Ox.
Model: _______________________________________________________________
PIN: _______________________________________________________________

3
Safety
Performance
Turning Circle A/C Unit Outboard Motor
Towing Capacity Amphibious Trailer Rear Bench Seat
Brush Guard Safari Rack (Half Length)
Cab - Aluminum Snow Plow - 85"
Cat Walk Float Kit Snow Plow - Boss V Blade
Cargo Liner Stereo Kit
Optional Controls - Steering Wheel Tracks - 16" Wide Adair
Dump Bed Twin Roll Bar Package
Mudd-Ox, Inc. Fender Kit Winch - Synthetic Rope
8525 W. 750 N. Front Float Kit Winch - 5000 lbs. Rear Mount
Shipshewana, IN 46565 Custom Colors Available Upon Request Fuel Fill - Rear Windshield
Phone: [phone] Heater Kit Windshield Wiper
Fax: [phone] Ver 0919
www.muddox.net
[e-mail]
Seating Capacity - Water
Seating Capacity - Land
Load Capacity - Water
Speed - Water Speed - Land
3 mph (5 km/h) [B]
1,000 lbs. (454 kg)(distributed evenly) Less the weight of
any accessories [C]
2,500 lbs. (1,134 kg) [G]
4 to 6 [D] 2 to 4 [D]
Rear Bench Seat
Ground Clearance
15" at center of vehicle
5,000 lb. Capacity
Electrical Output
Operation & Convenience
[G] Approximate Towing Capacity, depends on surface type and vehicle load as well
as incline. Max Hitch Tongue Load is 200 lbs. (98 kg)
Standard
12V Outlet, Dual Port USB Outlet
Weight & Dimensions
Self-Extraction Winch [F] Provides better flotation and allows for more carrying capacity in the water.
Roll Over Protection System with seat belts for front two passangers. Rear Roll Over Protection System is available as an option. Mudd-Ox Hydrostatic precision control drive system enables safe control at all times while maneuvering in the most difficult terrains.
Weight 3,000 lbs. on 20" Chevron Tracks
Lockable glove box, Built in Cup Holders
9" outer edge of vehicle
Storage
Ground Pressure
.7 psi
[D] Depending on weight of person, cargo and accessories onboard [B] Depends on water conditions, only operate in calm water without a current (No large lakes, open waters, oceans.)
1 year or 500 hours limited warranty on Mudd-Ox, 2
years or 2,000 hours engine warranty [E]
Warranty
123" Long x 82" Wide x 80" High on 26x14x12" Vendetta Tires with 20" wide Chevron track set. 25° Maximum
Warranty Approach and Departure angles
Dimensions
Cooling
Instrumentation
Controls & Instrumentation
Neutral Light
Low Oil Pressure
Check Engine
Warning Lights
Mudd-Ox Fort Mac Fully Hydraulic 8x8 with 20" Chevron Tracks
Accessories
[E] See Owner's Manual for full warranty information.
[C] See Owner's manual for accessory listing and weight.
Specifications are subject to change without notice.
[A] Top speed depends on terrain conditions and drive train options.
Safety
12 US Gallons giving approx. 8-10 hours of operation. With rear ROPS option: 10.5 gallons.
All weather, all terrain, -40°F to +110°F (-40°C to
+43°C)
Operating Conditions Fuel Capacity
Bilge Pump
Ground Clearance
Tires
Engine
Transmission
Ergonomic Left and Right Steering Controls
Spring Applied Hydraulic Released
Full Instrumentation Dash Panel 85 HP at 3,200 rpm
Ford MSG-425 EFI
Gasoline Fully Hydrostatic with Low and High RangeTransmission
Starting
Electrical
Maxx N65 Battery, 130 Amp Alternator
Electric Starter
Liquid-Cooled
2.5 Liter (152.5 CID)
Type
Model
Power Output
Steering
Parking Brake
Displacement
Lighting
Load Capacity - Land
2,000 lbs. (907 kg)(distributed evenly) Less the weight
of any accessories [C]
Body
Gauges
Parking/Emergency Brake
26" x 14" x 12" Mudd-Ox Vendetta on 12" Mudd-Ox
Beadlock Rim. Machine is Track Only, requires tracks
installed at all times
Zero turning radius, Tracks counter-rotate
Chassis, Body & Lights
Full Engine Power View & Diagnostics
Fuel Gauge
Volt Meter
Hour Meter
Hydraulic Temperature
Coolant Temperature
Powder coated steel for long life and durability
High Range 25 mph [A] (40 km/h)
Low Range 15 mph [A] (24 km/h)
LED Headlights & Tail Lights
Frame
Vacuum formed upper body, lower body and skid plate,
made from High Molecular Weight Polyethylene (HMWPE)

4
Reservoir Quantity Type
Engine Coolant 2 1/4 gallons 50/50 Glycol Antifreeze/Water
Engine Oil 6 quart pan, 0.7 quart filter =6.7 total Ford/Motorcraft “Formula
E” SAE 5W-20
Engine Oil Filter 1 filter Ford Service Part Number:1S7G-6714-DA
Motorcraft: FL-910
3.5-4 gallons oil tank
12 gallons entire system
Fuel Tank 13.5 gallons Gasoline
Tire Pressure 12 psi Air
AW-46Hydraulic Oil
Maintenance Schedule
Air filters: Verfiy they are clean before each use. Axle bearings: Every 25 hours or after each use in water/mud, whichever comes first. Engine oil: See Ford MSG-425 EFI Service Manual Hydraulic oil: Initial change after 250 hours. Then, every 500-1,000 hours depending on usage and work load Tires: Verify tire pressure before each use. Listed are the oil capacities for the Mudd-Ox Fort Mac. Always ensure the vehicle is correctly pre- pared and the fluid levels are within tolerance before ech use.
Accessory Weight Column1
Each Set
A/C Unit 70 lbs. N/A
Amphibious Trailer w/ 26" x 14" x 12" Vendetta's 800 lbs. N/A
Brush Guard 20 lbs. N/A
Cab- Aluminum 155 lbs. N/A
Cab Stereo Kit 30 lbs. N/A
Cargo Liner 22 lbs. N/A
Cargo Liner (In Cargo Frame) 31 lbs. N/A
Cat Walk Float Kit 200 lbs. N/A
Dump Bed 172 lbs. N/A
Fender Kit 7.5 lbs. 15 lbs.
Front Float Kit 70 lbs. N/A
Heater Kit 12 lbs. N/A
Outboard Motor Mount 20 lbs. N/A
*Plus weight of outboard motor of choice. Not to exceed 10 HP) - -
Rear Bench Seat 26 lbs. N/A
Snow Plow Kit - 85" Mudd-Ox 190 lbs. N/A
Snow Plow Kit - Boss Power V-Blade 475 lbs. N/A
Skid Plate 60 lbs. N/A
Twin Roll Bar 74 lbs. N/A
Winch - 5000 lbs. Rear Mount 34 lbs. N/A
Windshield 23 lbs. N/A
Windshield Wiper Kit 3 lbs. N/A

5
Warranty
Limited Warranty: Mudd-Ox Inc. (“Mudd-Ox”) hereby warrants to the original purchaser that any components of your new Mudd-Ox vehicle
manufactured by Mudd-Ox will be free from defects in material and workmanship for a period of (1) year from date of purchase or 500 hours,
whichever comes first, exempt as otherwise noted. Dealer demo vehicles are warrantied for (30) days.
Mudd-Ox Warranty Responsibilities: Mudd-Ox, if notified of a defect in material or workmanship during the period of warranty, will repair or
replace, at its option, defective parts covered by this warranty at no charge other than the reasonable cost for the transportation of components,
if applicable. Mudd-Ox will also pay reasonable charges for necessary labor to perform warranty repairs.
Warranty Claim Procedures: In order to be able to submit claims under this warranty, the original purchaser must maintain and operate the
vehicle in accordance with instruction provided: in the Owner’s Manual; engine manufacturer’s manual; in any manual related to components of
the vehicle; and on labels affixed to the vehicle. To initiate a warranty claim procedure, the original purchaser must contact the Mudd-Ox Custom-
er Service Department within (10) days of the discovery of an alleged defect. Mudd-Ox’s Customer Service Department may be contacted using
the following methods: by calling 1-260-768-7221, in person or by mail at Mudd-Ox Inc, 8525 W 750 N Shipshewana, IN 46565, or online at www.
muddox.net. The repair or replacement of any part(s) under this Limited Warranty shall not extend the term of the warranty beyond the original
term as set forth above. Products which Mudd-Ox Inc. determines violate such warranty shall be returned to the BUYER at the BUYER’S expense.
Any parts required for warranty that are not in the dealer’s inventory will be shipped to the servicing dealer via UPS Ground or USPS priority mail
at Mudd-Ox Inc. discretion.
General Exclusions: This limited warranty does not cover component failure or damage caused by any of the following: abnormal strain or stress;
neglect; abuse; theft; fire; improper assembly of components which were supplied in the factory sealed carton after the vehicle left Mudd-Ox;
improper maintenance or repair; modifications; damage caused by use of non-Mudd-Ox accessories; or improper use of the vehicle including
but not limited to: racing, jumping, stunt driving, or any other uses prohibited in the Owner’s Manual. Additionally, this warranty does not cover
vehicles which are leased, rented, or used at a concession track. This warranty does not cover components not manufactured by Mudd-Ox. For
warranty information on components not manufactured by Mudd-Ox, please refer to each component’s respective manufacturer’s warranty.

6
Warranty Cont.
Specific Exclusions: This limited warranty does not apply to components which are subject to normal wear and tear. These items are not limited
to: axles; track keepers; wheels; tires; batteries; throttle; shift, steer and brake cables; drive belt; the torque converter system; chain; seat; lights;
fasteners; decals; or body panels and natural cosmetic discoloration of material due to ultraviolet light. Shipping method of parts, incorrectly
damaged components, downtime, and delivery charges are not covered by this warranty. This warranty does not apply to the vehicle’s batteries.
The batteries carry a separate warranty provided by Mudd-Ox’s battery supplier. Please refer to the battery supplier’s warranty policy for their
warranty requirements and procedures.
No Implied Warranty of Fitness or Merchantability: There are no warranties that extend beyond the description on the face hereof. Specif-
ically, Mudd-Ox makes no other warranty of any kind, express or implied. All warranties of fitness or merchantability for a particular purpose
that exceed the obligations and time limitations specified in this warrant are hereby disclaimed by Mudd-Ox and excluded from this warranty.
Additionally, this warranty excludes any incidental or consequential damages, including but not limited to loss of use. Some states do not allow a
manufacturer to exclude or limit incidental or consequential damages and, therefore, the above exclusion may not apply.
Some states do not allow limitations on how long an implied warranty will last. It is possible that the above limitation may not apply. This warranty
gives the original purchaser specific legal rights. The original purchaser may also have other legal rights, which vary from state to state.
Warranty of Service: To obtain warranty service, the original purchaser must return the Mudd-Ox vehicle to the local authorized dealer or service
center, inform them of the warranty, and provide proof of purchase before any warranty service can be provided. The authorized dealer or service
center will inspect the product to determine what repairs or parts are needed and whether they are covered under this warranty. To locate an
authorized dealer or service center, please call Mudd-Ox at 1-260-7221 or visit Mudd-Ox online at www.muddox.net

7
Every operator MUST review and understand the basic operation manual and all warning labels displayed on this page and on the
vehicle before operation. Please keep a copy in the glove box for operators to review as needed.
A WARNING
AW46 Hydraulic Oil:
Fill Level Cold:
Middle of Sight Tube

VEHICLE LOAD CAPACITY ON LAND:
907 kg (2,000 lbs)
TOWING CAPACITY:
1134 kg (2,500 lbs)
VEHICLE LOAD CAPACITY IN WATER:
454 kg (1,000 lbs evenly distributed). Capacity includes
occupants and all installed accessories.
TIRE INFLATION:
12 psi with tracks
L
r

8
• Do not operate this vehicle while intoxicated
• Wear appropriate clothing: dress for weather conditions
• Operator must be at least 16 years of age
• Use common sense at all times while operating
• Always have a first aid kit and fire extinguisher inside the vehicle
• All passengers must be seated while the vehicle is in motion
• Do not overload the vehicle under any circumstances
• Ensure floor pans are in place while operating vehicle
• Avoid blacktop when possible
• Drive vehicle at safe speeds for terrain conditions
Safety
Before starting the vehicle, check all fluid levels. Ensure the lower body is free of water and debris. Check that the drain plugs, engine cover,
and all floor boards are in place. Check all tires for proper inflation (12 psi with tracks). All tires must be inflated to the same pressure.
Safety Equipment
All occupants must wear a DOT-certified helmet. There are seat belts for the front two passengers. Use the seat belts at all times on land and
ensure the ROPS system is up. Any time the vehicle is in water, you must remove your seat belt and helmet, and wear a life preserver.
General Safety
Do not operate on public roads. Do not operate in waters with current or open water such as large lakes and oceans. Do not refuel the machine
with the engine running. Do not operate the Mudd-Ox on angles greater than 25 degrees. Do not drive faster than conditions or your ability
allows. Do not attempt to make sudden sharp turns or go from forward to reverse abruptly; doing so could upset the machine or at the least
jostle the occupants, possibly causing injury.
Keep the inside lower body clean of debris and water. Grease the axle bearings every 25 or after going into water and mud, whichever comes
first. Check engine oil level, and hydraulic fluid daily before use. Please review the engine owner’s manual for operation and maintenance on
the engine.

9
Safety Continued
Load Capacity of the Mudd-Ox Fort Mac
Make sure to observe the vehicle load limits on land (2,000 lbs.) and in the water (1,000 lbs.) less the weight of accessories, and distributed
evenly. Only operate the Mudd-Ox in calm water. Under no circumstances should you operate a Mudd-Ox in open waters with a snow plow
attached.*
Load Capacity of the 6x6 Amphibious Trailers
The 6x6 amphibious trailers can haul cargo weighing up to 1,150 lbs. (evenly distributed) on land and in water.
Towing Capacity
With a trailer attached to the rear of the Mudd-Ox, you can haul a maximum combined 2,500 lbs. with trailer and cargo.
Prepare Your Trip
The Mudd-Ox is capable of traveling to remote locations where emergency services are not readily available. These locations can range
from desert to tundra climates. When traveling in the Mudd-Ox, always pack a survival kit suitable for all occupants in the vehicle. This
includes but is not limited to: food, water, extra clothing, fuel, flashlight, portable heater, tent, flares, tools, spare parts, and spare tires
mounted on rims.
*Please see page 4 for a list of all accessories and their weights.

10
US Customary Wind Chill Chart
50 40 30 20 10 0-10 -20 -30 -40 -50 -60
Calm 50 40 30 20 10 0-10 -20 -30 -40 -50 -60
548 37 27 16 6-5 -15 -26 -36 -47 -57 -68
10 40 28 16 4-9 -21 -33 -46 -58 -70 -83 -95
15 36 22 9-5 -18 -36 -45 -58 -72 -85 -99 -112
20 32 18 4-10 -25 -39 -53 -67 -82 -96 -110 -124
25 30 16 0-15 -29 -44 -59 -74 -88 -104 -118 -133
30 28 13 -2 -18 -33 -48 -63 -79 -94 -109 -125 -140
35 27 11 -4 -20 -35 -49 -67 -82 -98 -113 -129 -145
40 26 10 -6 -21 -37 -53 -69 -85 -100 -116 -132 -148
*Wind speeds
great than 40
mph have little
additional effect
Wind Speed in
MPH
*Danger from freezing of exposed flesh
Equivalent Temperature (F)
Actual Thermometer Reading (F)
GREAT DANGER
LITTLE
DANGER*
INCREASED
DANGER*
Wind chill is the feeling of colder temperatures than what the thermometer reads. This happens when the wind blows cold air across
exposed skin.
All Mudd-Ox operators and passengers must be aware of the wind chill factor. Always dress properly for the weather and cover exposed
skin. Ensure young children are adequately dressed for cold temperatures. It is best to bring candles and blankets in case of emergency.
For colder applications, we highly recommend installing a windshield, top and heater on the Mudd-Ox.

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Instrument Panel
1. Neutral Light: Illuminates when both control levers are in neutral position. This is required for the vehicle to start.
2. Low Hydraulic Oil-L Warning Light: Illuminates when the hydraulic oil is dangerously low on the driver side tank. If illuminated, stop vehicle
immediately and diagnose why the oil level is low, repair, then fill. Note: Not applicable on early models.
3. Low Hydraulic Oil-R Warning Light: Same as #2 but for passenger side oil tank.
4. Parking Brake Light: Illuminates when the parking brake is engaged. This is required for the vehicle to start.
5. Digital Display: This electronic monitoring system shows engine RPM, oil pressure, coolant temperature and battery voltage. Located below the
screen are buttons used to cycle through various digital displays. Refer to engine manual for additional information.
6. Fuel Gauge: The fuel gauge monitors the amount of fuel left in the vehicle. When traveling to remote locations, the vehicle should always be
filled with additional fuel cans in case of emergency. Leave enough fuel to return back to your starting location.
7. Range Switch: This switch controls the High and Low range of the Mudd-Ox. High range is only to be used for travel. Any work or pulling of
trailers must be done in low range. Always come to a complete stop with the control levers in neutral position before changing range.
8. Head Lights Switch: Flipping the switch to “ON” will activate the headlights and tail lights. Never operate the Mudd-Ox at night without lights.
9. Emergency Bypass Switch: It is designed to override preliminary startup procedures to quickly start the vehicle. By holding the switch in the
“ON” position, it will bypass the need for control levers to be in neutral, and will bypass the parking brake. Note: this is for emergency use only.
Using this switch without care could cause the vehicle start and immediately move depending on operator lever location.
10. Bilge Pump Switch: When in an emergency, if the Mudd-Ox has water in the lower body, quickly flip on the bilge pump switch. This will im-
mediately begin to pump water out of the vehicle. Caution: This is a feature to remove small amounts of water. If the machine is completely
filled, you must quickly exit quickly.

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Instrument Panel Cont.
11. Windshield Wiper Switch: Only applicable on Mudd-Ox’s equipped with a windshield wiper. There is both a High and Low setting. High moves
the blade quickly, while Low moves it slower. Select setting based on weather conditions and visibility.
12. Winch Switch: Controls the direction of the winch motor. The “OUT” position will unreel the cable away from the Mudd-Ox, while “IN
will reel the cable towards the Mudd-Ox.
13. MIL Light: Malfunction Indicator Light. See page 39 and manufacturer’s engine manual for additional information.
14. Ignition Switch: When the key is installed, it will toggle the engine on and off. Turn completely clockwise to start engine, release once started.
Turn completely counterclockwise to shut off engine. (If the engine fails to start after 10 seconds, turn off the key for 5 to 30 seconds and then
try again). See manufacturer’s engine manual for additional information.
15. MIL Fuse: Fuse holder for MIL light. See page 39 and manufacturer’s engine manual for additional information.
16. Hydraulic Oil Temp Left Gauge: The oil gauge monitors hydraulic oil temperature, and must not exceed 180 degrees Fahrenheit. If the tem-
perature exceeds 180 degrees, immediately shut off machine and let it cool down.
17. Hydraulic Oil Temp Right Gauge: Same as #16 but for right side tank.
18. Twist Throttle: For easy of driving, the Fort Mac is designed with a twist throttle system. Once the engine is started, simply turn the throttle
counterclockwise for higher RPM, and the clockwise for lower RPM. Pushing in the knob returns throttle to neutral position.
19. USB Ports: Under the weatherproof cover are (2) 12V USB ports. These may be used to power accessories such as a cell phone.
20.Cigarette Lighter Port: Under the weatherproof cover is a 12V cigarette light port. This may be used to power accessories such as a cell phone.

15
Drive the Mudd-Ox Fort Mac
Move the left nd right control levers forwrd nd bckwrds until you feel the neutrl detent, nd the neutrl light on the dsh will illuminte.
Mke sure the prking brke is engged nd the prking brke light on the dsh is flshing. Mke sure ll persons re seted nd crgo is se-
cured for movement. Also verify ny person outside the mchine is  sfe distnce wy.
Emergency Bypass
The bright red switch on the instrument panel is for emergency use only. It is designed to override preliminary startup procedures to quickly
start the vehicle. By holding the switch in the “ON” position, it will bypass the need for control levers to be in neutral, and will bypass the parking
brake. Once again please note this is for emergency use only. Using this switch without care could cause the vehicle start and immediately move
depending on operator stick location.
Engine Startup
Insert key. Turn completely clockwise to start engine, release once started (If the engine fails to start after 10 seconds, turn off the key for 5 to
30 seconds and then try again). Turn completely counterclockwise to shut off engine.
Engine Throttle
For easy of driving, the Fort Mac is designed with a twist throttle system. Once the engine is started, simply turn the throttle counterclockwise for
higher RPM, and the clockwise for lower RPM. Full throttle will give you full power and torque. Half throttle will give you half power and torque,
etc. The more you apply the throttle, the more power and speed you will be able to achieve. Note: It is not recommended to drive the Mudd-Ox
under 2000 RPM. Pushing in the knob returns throttle to neutral position.
Range
High range will allow the Mudd-Ox to reach its top speed, while Low range is limited. High range is only to be used for travel. Any work or pulling
of trailers must be done in low range. Always come to a complete stop with the control levers in neutral position before changing range.