• Extreme Vibration

• Raise Heater Flange
• Additional Structural Support

• Horizontal Installation

Fuel & Fluid Heaters

WARNING: Failure to use recommended reinforcement kits or providing additional structural support
to heater may cause tank to crack, leading to fuel leakage.

• Additional Structural Support

KT-875
Purpose: To raise HOT FOX™ fuel heater
flange 1/2" (13mm) above tank.
THREADED ADAPTER
Fits 1-1/2" & 2" NPT Couplings
A-1721
(To –40° F/C)
Parts Included
(1) A-1792 Gasket
(2) A-1726 O-Ring

A-1721F
(To –90°F/-67°/C)
Parts Included
(1) A-1792 Gasket
(2) A-2758 O-Ring

WELD-IN ADAPTER
For Fuel or Hydraulic Tanks
A-2060 (Steel)
A-2060-A (Alum.)
(To –40° F/C)
Parts Included
(1) A-1792 Gasket
(2) A-1726 O-Ring

A-2060F
A-2060-AF
(To –90° F/-67°C)
Parts Included
(1) A-1792 Gasket
(2) A-2758 O-Ring

NON-REINFORCED GAUGE OPENING ADAPTERS
Installation:
• Non-Reinforced Opening
• Manufactured Tanks
Steel: 14 gauge (0.075”/1.9mm) and lighter
Aluminum: 0.100”/2.5mm and lighter
• Additional Structural Support

Parts Included:
• (5) A-863 #10-32 UNF socket head bolts
• (1) A-841 Gasket
• (1) A-875 1/2" (13mm) Spacer
KT-877
Purpose: To raise HOT FOX™ fuel heater
flange 1" (25mm) above tank. For Kenworth
recessed gauge opening & misc. others
Parts Included:
• (5) A-869 #10-32 UNF socket head bolts
• (1) A-841 Gasket
• (1) A-877 1" (25mm) Spacer

HOT FOX™ FUEL & FLUID
HEATER ACCESSORIES
BLANK PLATE
Part No. A-870
Application
• Cover Standard USA
Fuel Tank Opening
TAPPED PLATE
Part No. A-4607

FLAT TANKS
KT-826F

ROUND TANKS
KT-827C for 22"-29"/559-737mm Dia.

Applications:
Adapts standard Arctic Fox fuel
heater mount to Hot Fox™ mount.

KT-831CS for 14"-21"/356-533mm Dia.

Kit Components
• Adapter Plate 6"/152mm Square
• (1) A-826
• Backing Plates (2) A-2025
• Clips (4) A-649
• Gasket (1)—A-611
• Mounting Bolts (12) – A-610
• Template (1)—A-708

Applications:
Adapts standard Arctic Fox fuel heater
mount to Hot Fox™ mount.
Kit Components
• Adapter Plate 6"/152mm Square (1)
• A-827 for KT-827C
• A-831 for KT-831CS
• Backing Plates (2) A-1795
• Clips (4) A-649
• Gasket (1)—A-611
• Mounting Bolts (12) – A-610
• Template (1)—A-708

U.S/CAN: 1-800-654-5382 fax: 763-972-2873
The Netherlands: +31 165 55 9245 fax: +31 165 54 9640

Application
• Auxiliary Standpipe
Installation into a Standard
USA Fuel Tank Opening
• Center Tap for 1/2" NPT
120MM FLANGE
KT-829K
Application
• Adapts Kenworth OEM
104.5mm B.C. Flange to
Hot Fox™ mount
Kit Components
• (1) Adapter Plate – A-829
• (1) Gasket – A-811
• (10) Mounting Bolts – A-856

7

Fuel & Fluid Heaters

SHUT-OFF THERMOSTATS

S-400T/S-440T
With A-289
Steel Tee

S-400ST/S-440ST
With A-284
Steel Street Tee

S-400HT/S-440HT

With A-289 Steel Tee
(2) 1/4x20 Mounting Holes

S-400BT/S-440BT

With A-289 Steel Tee
Mounting Bracket, (2) Bolts
& Washers

Used to control fuel temperature for any coolant type fuel warmer
• Model 400 stops coolant flow when fuel temperature through the Tee is approximately 78° to 95° F / 25° to 35° C
• Model 440 stops coolant flow when fuel temperature through the Tee is approximately 104° to 125° F / 40° to 52° C
• All fluid connections are 1/2" NPT
NOTE: Any component or device connected in series with this product will NOT receive coolant once the fuel reaches the
temperatures shown above.

DIMENSIONS
S-400BT

S-400BT

S-400BT REPLACEMENT PARTS
Item
1
2
3
4
5

8

Qty
1
1
1
2
2

Description
Shut-Off Thermostat Assembly
1/2" NPT Pipe
Mounting Bracket
5/16" Split Lock Washer
5/16" UNC x 1.25" (32mm) Bolt

Part #
S-400HT
A-289
A-315
A-317
A-316

U.S/CAN: 1-800-654-5382 fax: 763-972-2873
The Netherlands: +31 165 55 9245 fax: +31 165 54 9640

Fuel & Fluid Heaters

ARCTIC FOX® IN-TANK FUEL & FLUID HEATERS
The original Arctic Fox® fuel heater. The stainless steel loop fits flat or curved tanks. Heaters may be ordered factory assembled
to fit any tank depth from 14" through 29" (356mm through 737mm). Custom built fluid heaters may be quoted for tanks under
14" (356mm) depth or over 29" (737mm) depth. 5 year or 600,000 mile (1,000,000 kilometer) warranty.
NOTE: For tanks less than 14" (356mm) or over 29" (737mm) in depth, a custom part number will be assigned.
ALL MODELS REQUIRE 2-3/4" (70mm) CLEARANCE ABOVE THE TANK

Coolant In/Out

Fuel Out

Fuel Stand Pipe

F-253P

KIT WARMERS WITHOUT THERMOSTAT (FACTORY ASSEMBLY AVAILABLE)
Part
C-201
C-201P
C-251
C-251P
CS-201
CS-201P
CS-251
CS-251P
F-203
F-203P
F-253
F-253P

Tank Depth
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Flat 14" through 29" (356mm through 737mm)
Flat 14" through 29" (356mm through 737mm)
Flat 14" through 29" (356mm through 737mm)
Flat 14" through 29" (356mm through 737mm)

U.S/CAN: 1-800-654-5382 fax: 763-972-2873
The Netherlands: +31 165 55 9245 fax: +31 165 54 9640

Coolant Hose
5/8" Hose Barb
1/2" Female Pipe Thread
5/8" Hose Barb
1/2" Female Pipe Thread
5/8" Hose Barb
1/2" Female Pipe Thread
5/8" Hose Barb
1/2" Female Pipe Thread
5/8" Hose Barb
1/2" Female Pipe Thread
5/8" Hose Barb
1/2" Female Pipe Thread

Fuel
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes

9

Fuel & Fluid Heaters

ARCTIC FOX® IN-TANK FUEL & FLUID HEATERS
DIMENSION AND REPLACEMENT PART INFORMATION

Item No.
1
2
3
(a) 4
5
6
7
8
9
(b) 10

Qty.
4
2
12
1
1
2
4
4
1
2

11
12
(c) 13
(a) Option 4
(b) Option 10
(c) Option 13
Misc.
Misc.
Misc.
Misc.
Misc.
Misc.

2
8
2
1
2
2
N/A
N/A
N/A
N/A
N/A
N/A

10

Description
Retaining Clip – (Included in Installation Kit)
Copper Washer
Mounting Bolt – (Included in Installation Kit)
Curved 2-Hole Plate – See Option 4 Below for Flat Plate
Gasket – (Included in Installation Kit)
Locking Nut
Split Ring Ferrule
Compression Nut
Heat Exchanger Tube 28" / 711mm
5/8" Tube Fitting Elbow to 5/8" / 16mm Hose Barb (Includes 7 & 8) –
See Option 10 Below for 1/2" NPT
Bushing (Includes 6, 7, & 8)
O-Ring Kit (Package Contains 4 Each White & Black O-Rings) – NOT SHOWN
Curved Back-Up Plate – See Option 13 Below for Flat Back-Up Plate
Flat 2-Hole Plate
5/8" Tube Fitting Elbow to 1/2" Female NPT
Flat Back-Up Plate
Curved Cover Up Kit – 22" Through 29" / 559mm Through 737mm Tanks
Curved Cover Plate – 22" Through 29" / 559mm Through 737mm Tanks
Flat Cover Up Kit
Flat Cover Up Plate
Curved Cover Up Kit – Up To 22" / 559mm Tanks
Curved Cover Up Plate – Up To 22" / 559mm Tanks

Part No.
A-649
A-616
A-610
A-415-2
A-611
A-628
A-621
A-639
A-600
A-613
A-612
A-617
A-1795
A-414-2
A-619
A-2025
KT-1909
A-415-0
KT-1911
A-414-0
KT-1910
A-541-0

U.S/CAN: 1-800-654-5382 fax: 763-972-2873
The Netherlands: +31 165 55 9245 fax: +31 165 54 9640

Fuel is warmed to the optimum operating temperature in cold weather with the proven Arctic Fox® fuel heater in-tank design.
A fully mechanical thermostat integrated into the unit by-passes the fuel warming loop when fuel temperature reaches optimum
operating temperature. This simple ”hands off” design is the choice of trucking fleets who demand fool proof operation.
FEATURES AND BENEFITS
• By-passes coolant when fuel temperature reaches optimum operating temperature, allowing this fuel heater to be plumbed
in series with other components such as preheaters, air compressors, and cab heater lines, with out affecting coolant flow.
• Integral design fits all fuel tanks, simplifies plumbing and reduces fittings.
• Fully mechanical. No electrical components to cause maintenance problems.
• Maintains temperature levels which are recommended by engine manufacturers and helps keep the in-tank fuel within
the recommended temperature limits for maximum horsepower.
• Works with engine preheaters to maintain the "coolant loop".

By-Pass
Thermostat

In-Tank
Coolant Loop

C-406-XX Shown
Also available with
fuel standpipe. Refer
to chart below for
ordering information.

ORDERING INFORMATION: ALL heaters are factory pre-assembled. Order heaters based upon outside tank dimension.
Example C-406-XX—if tank outside dimension is 27" / 686mm, order C-406-27
NOTE: Warranty is void if disassembled

Part
C-406-XX
C-407-XX
C-456-XX
C-457-XX
CS-406-XX
CS-407-XX
CS-456-XX
CS-457-XX
F-406-XX
F-407-XX
F-456-XX
F-457-XX

Tank Depth
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 22" through 29" (559mm through 737mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Round 14" through 21" (356mm through 533mm)
Flat 14" through 29" / 356 through 737mm
Flat 14" through 29" / 356 through 737mm
Flat 14" through 29" / 356 through 737mm
Flat 14" through 29" / 356 through 737mm

U.S/CAN: 1-800-654-5382 fax: 763-972-2873
The Netherlands: +31 165 55 9245 fax: +31 165 54 9640

Coolant Connection
5/8" Hose Barb
3/4" Hose Barb
5/8" Hose Barb
3/4" Hose Barb
5/8" Hose Barb
3/4" Hose Barb
5/8" Hose Barb
3/4" Hose Barb
5/8" Hose Barb
3/4" Hose Barb
5/8" Hose Barb
3/4" Hose Barb

Fuel Standpipe
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes

11

Fuel & Fluid Heaters

ARCTIC FOX® IN-TANK FUEL & FLUID
HEATERS WITH BY-PASS THERMOSTAT

Fuel & Fluid Heaters

IN-LINE FUEL HEATERS
•
•
•
•
•
•

A Model for Every Application
Easy Installation
Maintenance Free
No Moving Parts
100% Stainless Steel Construction
Optional Coolant Shut-Off Thermostat

Linehauler™

Midranger™

In-line fuel heating is a proven, cost effective method of providing protection against stall-outs due to fuel gelling. Obtain the
margin of safety you need in moderate cold weather. In extremely cold weather operation, in-line heaters may be combined with
in-tank heaters to provide additional protection.
An advantage of in-line fuel warming is the flexibility of mounting locations. Installation is accomplished by simply routing fuel
and coolant lines to the unit. Positioning the unit close to the fuel filter, assures maximum fuel warming efficiency and prevention
of costly fuel freezing and clogging at the filter.
Electric
Check Valve
Shut-off
Duel
Fuel Inlet
Preheat
Coolant
Fuel Flow
Mounting
See (1)
Thermostat
Port
Part No.
GPM/LPM
Hardware
Below
See (2) Below See (3) Below See (4) Below Fuel Port

I-702
I-702B
I-703
I-703B
I-703BT

0.1-0.5 / 0.4-1.9
0.1-0.5 / 0.4-1.9
0.1-1.5 / 0.4-5.7
0.1-1.5 / 0.4-5.7
0.1-1.5 / 0.4-5.7

No
Yes
No
Yes
Yes

No
No
No
No
Yes

I-703BTEH

0.1-1.5 / 0.4-5.7

Yes

Yes

I-704B
I-704BT

0.1-1.5 / 0.4-5.7
0.1-1.5 / 0.4-5.7

Yes
Yes

No
No

I-704BTEH

0.1-1.5 / 0.4-5.7

Yes