Curtis Ferris ISX 3300 Operating instructions

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INSTALLATION & OWNER’S MANUAL
Ferris ISX 3300
(p/n: 1FISX33PR)
Cab with A/C
(fits both 60” and 72” mowers)
(does not fit with bagger systems)
Rev. A, 12/21/2022
p/n: IM-1FISX33PR
While this cab kit was designed to fit on the vehicle listed above, manufacturing tolerances and vehicle
assembly may affect cab fitment. It is the responsibility of the cab installer to check all vehicle pedals and
levers for full functionality and, as required, adjust the cab fitment to prevent any interference of the cab
components with the travel of pedals or levers.
(*=Not including accessories)
Available Options:
1. Side View Mirrors (P/N: 9PM5)
2. Switch Panel (P/N: 1FISX33CK) (required for the following 2 items)
3. Front LED Work Lights (P/N: 1ZTRLK)
4. Front Wiper/Washer Kit (P/N: 1ZTRWK)
Approximate Installation Time *
Experienced Dealer Technician – 4 Hours
Average Dealer Technician – 6 Hours
Do-It-Yourself – 6-8 Hours
Approximate Product Specifications
Floorboard to Roof Height: 57 inches
Weight: 252 lbs.
Cab Width: 50 inches
The contents of this envelope are the property of the owner. Leave with the owner when installation is complete.
Register your new product quickly online at
Curtiscab.com/product-registration/
Download a digital copy of your installation
instructions online at Curtiscab.com/literature/
Curtis encourages all customers to register their
Curtis products. However, failure to do so will not
diminish right to warranty. Curtis Industries does not
sell or share your information with anyone else.
Curtis strives to continuously improve our products,
technical documentation, etc. Therefore, the
installation manual for this product may have been
updated after your product was packaged. The
latest revision of the installation manual can always
be found at the website above.
Premium Cab Shown with Options

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TABLE OF CONTENTS
WARNINGS, TIPS, & REQUIRED TOOLS...................................................... 3
VEHICLE PREP........................................................................................... 4-5
CAB INSTALLATION.................................................................................. 6-14
CAB FEATURES & OPERATION.................................................................. 15
CARE AND MAINTENANCE......................................................................... 16
TROUBLESHOOTING.................................................................................. 16
SERVICE PARTS .................................................................................... 17-22
BOLT TORQUE SPECIFICATIONS .............................................................. 23

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Curtis cabs feature an assembly of parts designed for your vehicle which require adjustment
and alignment of components to accommodate vehicle variations and provide proper weather
protection. For accurate installation, proper operation, and years of satisfaction, please read
and understand the installation and owner’s manual fully prior to installing the cab.
From all of us at Curtis, we thank you for choosing our product.
HELPFUL HINTS:
•Refer to parts diagram found in the service parts section of this manual to help identify parts
during the assembly process.
•To assist with the cab installation, leave all fasteners loose for later adjustment unless
otherwise specified.
•Read and understand all instructions before beginning.
•Apply a silicone sealant to seal any minor gaps that may occur due to vehicle variations.
•Use caution to avoid damaging the factory installed threaded inserts or weld nuts. Begin the
thread engagement by hand to avoid or correct potential cross threading.
•Make sure the areas where the supplied self-adhesive hook Velcro will be applied are clean
and dry and at room temperature for best adhesion.
driver and passenger.
Curtis accessory weights are listed in product
add additional weight to the base vehicle. All
Curtis Cabs, blades and general accessories
ADDED
WEIGHT
brochures. Deduct the accessory's total weight
from the vehicle's rated capacity and never
exceed the vehicle's rated capacity including
Exposure to Carbon Monoxide
can Cause illness, serious injury or
death. Never operate vehicle if suspicious of Carbon Monox-
ide. Inspect exhaust system for leaks monthly. Leaks can
result from loose connections, corrosion, cracks or other
damage to the exhaust manifold. If leaks are found, repair or
replace exhaust system. Do not use vehicle until repair or
replacement is complete.
•Set of Standard and Metric Sockets (3/8” + 1/2” Drive)
•3/8” + 1/2” Drive Ratchets and Long Drive Extension
•Set of Standard and Metric Open-End Wrenches
•Set of Standard and Metric Allen Wrenches
•#1, #2, and #3 Phillips Head Screwdrivers
•Torque Wrench (1/2” Drive)
•Rubber Mallet or Plastic Dead Blow Hammer
•Bungee Cord or Twine
•Hoisting Strap
•1-1/2” Hole Saw
•T25 and T30 Torx Wrench or Driver
•Cut-Off Wheel
•Drill/Driver
•9/32” Drill Bit
•#2 and #3 Phillips Head Bit
•Utility Knife
•Pair of Scissors
•Shears
•Grease
•Black Silicone Sealant
•Steel Straight Edge
•Wire Cutter or Snips
•Belt Tension Tester
WARNINGS, TIPS, & REQUIRED TOOLS
TOOLS REQUIRED:
GENERAL INFORMATION BEFORE YOU START
California Health and Safety Proposition 65 Warning: This product may contain chemi-
cals known to the state of California to cause cancer and birth defects or other reproductive harm.

CAB INSTALLATION
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Step 1: (Vehicle Engine Prep)
1.1 Park vehicle in a location accessible by an
overhead hoist.
1.2 Disconnect the negative battery terminal.
Tools Required
7/16” wrench or socket
1.3 See fig. 1.3. Remove the upper wire screen and
lower mesh screen from the top of the vehicle’s
engine. Discard the upper screen, but retain the
lower mesh screen, triangle, and hardware.
Tools Required
10mm wrench or socket
T30 Torx wrench or driver
1.4 See fig. 1.4. Install stub shaft onto the top of the
engine crankshaft with three 8mm socket head
cap bolts and split lock washers and tighten
hardware to 20 ft-lbs. (27.2 N-m)..
Tools Required
6mm Allen hex wrench or driver
Hardware Used Qty
M8x1.25 x 25mm Socket Cap Bolt 3
M8 Split Lock Washer 3
1.5 See fig. 1.5. Take the metal drill template and
hardware from the small polybag from the small
hardware box. Attach the template to the
underside of the mesh screen using the hardware
from the polybag.
Use a 1-1/2” hole saw, with the center pilot drill
removed, to cut a hole in the mesh screen through
the center hole in the drill template. A small rotary
cutter, wire cutters or similar tools may also be
used, using the template to ensure the size and
centricity of the hole. The hole in the mesh screen
should fit closely over the new stub shaft. The
screen will rotate with the shaft, so a tight fit is
permissible, however the hole can be trimmed
further if desired. Remove and discard the
template and hardware.
Tools Required
3/8” and 7/16” hex wrenches or sockets
1-1/2” hole saw or other cutter
Hardware Used Qty
1/4-20 x 5/8” Flanged Hex Bolt 3
1/4-20 Flanged Lock Nut 3
1.6 See fig. 1.6. Re-install the triangle and mesh
screen onto the engine using its original hardware.
Tighten all hardware. Save the remaining
hardware removed in step 1.3 for use later.
Tools Required
T30 Torx wrench or driver
Fig. 1.5 (Cut hole in mesh screen)
Fig. 1.3 (Remove engine screens)
Fig. 1.4 (Install stub shaft)
Fig. 1.6 (Re-install screen)
Remove Remove
Triangle (remove)
Install
8mm SHCS
Stub Shaft
Triangle plate
under screen

CAB INSTALLATION
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Step 1: (Vehicle Engine Prep, continued)
1.7 See fig. 1.7. Loosen the set screw on the pulley from
the hardware box until it does not protrude into the
slot. Place the machine key from the hardware kit
into the slot in the stub shaft and slide the pulley over
the shaft aligned to the key, then tighten the set
screw. Secure the pulley with the large washer from
the larger polybag from the hardware box, along with
a 7/16” bolt and split lock washer. Torque the 7/16”
bolt to 32 ft-lbs. (43.4 N-m).
Tools Required
5/32” Allen hex wrench or driver
5/8” hex wrench or socket
Hardware Used Qty
1/4” Square x 3/4” lg. Machine Key 1
7/16-20 x 1.75” Hex Head Bolt 3
7/16” Split Lock Washer 3
1.625” OD x 3/8” thick Washer 1
Step 2: (Vehicle Interior Prep)
2.1 Press the small lever at the rear-left base of the seat
and rotate the seat forward.
2.2 Remove the rear left nut holding the seat to the seat
base. Per fig. 2.2, install the seat lever seal panel on
the under side of the seat base, aligned to the seat
bolt and the small hole in the seat base. Secure the
panel with the seat nut and a 1/4” bolt and nut.
Tools Required
3/8”, 7/16”, and 13mm hex wrenches or sockets
Hardware Used Qty
1/4-20 x 5/8” Flanged Hex Bolt 1
1/4-20 Flanged Lock Nut 1
2.3 Remove the headrest mount from the seat back, re-
install the bolts into the seat back, and tighten snug.
Tools Required
3/16” Allen key or driver
2.4 See Fig. 2.4. Remove the headrest from the
headrest mount and install the headrest onto the new
mount from the larger hardware box. Make sure the
bends on the headrest mount face away from the
headrest. Re-use the hardware and tighten snug. Set
the headrest assembly aside.
2.5 Remove the floor pan from the vehicle. Take the 5’
length of bulb rubber from the hardware box. See fig.
2.5. Trim one end of the rubber at a 45° angle and
place it at the rear corner of the floor pan and trim at
the front end with about an inch excess.
Repeat for the next piece with an opposite angle
along the back edge of the floor pan and push the
two rubber corners together. Trim the remaining
rubber to the other rear corner leaving no gaps in the
rubber, then trim the rubber flush to the front edge of
the floor pan.
Tools Required
Shears
2.6 Re-install the floor pan.
Fig. 2.5 (Install rubber to floor pan)
Fig. 2.2 (Install seat lever seal)
Fig. 2.4 (Install headrest to new mount)
Fig. 1.7 (Install Pulley)
Square key Large washer
Seat nut
New 1/4-20 bolt

CAB INSTALLATION
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Step 3: (Install Cab Mounts)
CAUTION: Work on the following steps one side at a time
so that the opposite side will remain fastened.
3.1 See fig. 3.1. Remove the 1/2” bolt and nut from the
bottom of the right side of the vehicle ROPS. Install
the right side ROPS mount with the 1/2” bolt through
the bracket and the ROPS. Install the nut loosely onto
the bolt.
Tools Required
3/4” hex wrench or socket
3.2 Hook the tab on the ROPS bracket into the mount
and secure with two 5/16” bolts and nuts.
Tools Required
1/2” hex wrenches or sockets
Hardware Used Qty
5/16-18 x 1” Flanged Hex Bolt 2
5/16-18 Flanged Lock Nut 2
3.3 See fig. 3.3. Repeat steps 3.1 and 3.2 for the left side
ROPS mount and bracket, using the longer 1/2” bolt
from the hardware kit. Install the nut loosely onto the
bolt at this time. The longer bolt will be used to help
secure the A/C compressor bracket.
Tools Required
3/4” hex wrench or socket
1/2” hex wrenches or sockets
Hardware Used Qty
1/2-13 X 3.5” Flanged Hex Bolt 1
5/16-18 x 1” Flanged Hex Bolt 2
5/16-18 Flanged Lock Nut 2
3.4 Note the placement of the bolts at the top of the
shock towers on the vehicle:
• If the head of the bolt is on the front side, remove
the nut from the bolt and leave the bolt in place.
• If the bolt head is on the rear side, lift the vehicle
to relieve pressure on the bolt, remove the bolt
and re-install it on the front side of the shock
tower.
Tools Required
9/16” hex wrenches or sockets
3.5 See Fig. 3.5. Install the front cab mounts onto the
shock tower bolts, on the rear side of the shock
towers and re-install the nuts onto the bolts. Align the
top surfaces of the mounts parallel to each other and
tighten snug. Do not fully torque at this time
3.6 Remove the ROPS pin and cotter pin from one side
of the vehicle ROPS. Cut the ROPS pin 1/4” to 3/8”
from the large shoulder on the pin, discarding the
curved section as shown in Fig. 3.6.
Tools Required
Cut-Off Wheel
Re-install the shortened pin into the ROPS and
repeat for the other side.
NOTE: the cab will not fit over the ROPS pins if they are
not trimmed.
Fig. 3.5 (Install front cab mounts)
Fig. 3.1 (Install right side ROPS mount)
Fig. 3.3 (Install left side ROPS mount)
Fig. 3.6 (Trim ROPS pins)
Keep
Discard
Cut
Right ROPS
bracket
Right ROPS
mount
ROPS bolt
Ref.: threaded
inserts here (2x)
Left ROPS
bracket
Left ROPS
mount
Leave nut loose
Front cab
mounts
Nuts on
rear side
Hook
Tab

CAB INSTALLATION
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Step 4: (Cab Installation)
4.1 See fig. 4.1. Set the deck height for the mower to
3-1/2”. This will place the height adjustment lever
to a near vertical position for minimal interference
with the cab as it’s lowered.
4.2 Remove the doors from the cab and set aside
carefully to prevent scratching the panels.
4.3 See fig. 4.3. Remove the 3 bolts securing the
compressor bracket to the base of the rear
shipping mount and cut any zip ties holding the
hoses and wire harness to the shipping mount.
Support the compressor using a bungee cord or
rope. Do not ever use the hoses to support the
compressor or damage may occur.
Tools Required
9/16” hex wrenches or sockets
4.4 See fig. 4.4. Position a lifting strap where shown
so that it sits roughly centered on the hinge tubes
and the ball studs on the frames.
4.5 See figure 4.5. Put tension on the lifting strap with
the overhead hoist. Remove and discard the 8
bolts holding the rear of the cab down to the rear
shipping mount as well as the 4 bolts holding the
cab to the front mounts.
Tools Required
1/2” hex wrenches or sockets
4.6 With assistance, lift the cab and position over the
vehicle. Be sure to support the A/C compressor
so that it never hangs from the hoses.
4.7 Lower the cab slowly onto the vehicle being
careful to not scratch the fenders with the rear
edge of the floorboard. The ROPS should be
entirely inside the cab a few inches in front of the
rear of the cab. Make sure the A/C wire harness
is not pinched underneath the cab.
4.8 See fig. 4.8. Fasten the rear of the cab to the
ROPS mounts using the following hardware.
Leave loose at this time.
Tools Required
1/2” hex wrenches or sockets
Hardware Used Qty
5/16-18 x 1” Flanged Hex Bolt 8
5/16”x1” Steel Fender Washers 12
5/16-18 Flange Lock Nut 4
4.9 See fig. 4.8. Fasten the cab to the front mounts of
the tractor using the following hardware.
Tools Required
1/2” hex wrenches or sockets
Hardware Used Qty
5/16-18 x 1” Flanged Hex Bolt 4
5/16”x1” Steel Fender Washers 4
5/16-18 Flange Lock Nut 4
4.10 Check for a complete seal around the perimeter of
the cab, then tighten all bolts from steps 4.8 and
4.9 snug. Torque the 3/8-16 front shock tower
bolts to 20 ft-lbs. (27.2 N-m).
Fig. 4.5 (Cab pallet bolts)
Fig. 4.3 (Unbolt Compressor)
Fig. 4.4 (Position lifting strap)
Fig. 4.1 (Set mower deck height to 3-1/2”)
Compressor
shipping bolts
Hinge tubeBall stud
Lifting strap
Remove 2
bolts at
each front
corner
Remove 4
bolts at
each rear
corner
Fig. 4.8 (Cab mounting bolts)
Fender
washer
below
Fender washer
both sides
Cab Front Mount (left)Cab Rear Mount (left)
Fender
washer
above

CAB INSTALLATION
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Step 5: (A/C Compressor Installation)
5.1 See fig. 5.1. Place the front flange of the A/C
compressor bracket over the 1/2” ROPS bolt on
the left side ROPS and loosely place a nut over
the bolt. Secure the side flange of the compressor
bracket to the rear vehicle flange with two 3/8”
bolts installed from inside the frame. Torque the
1/2-13 ROPS bolts to 50 ft-lbs. (68 N-m).
Tools Required
3/4” hex wrenches or sockets
9/16” hex wrenches or sockets
Hardware Used Qty
1/2-13 Flanged Lock Nut 1
3/8-16x1.5” Flanged Hex Bolt 2
3/8-16 Flanged Lock Nut 2
Step 6: (A/C and Cab Wiring)
6.1 See fig. 6.1. Route the A/C harness toward the
front of the cab between the ROPS and oil tank,
below the flange at the bottom of the ROPS.
Attach the wire harness to the tab on the right
ROPS bracket with a 3/4” P-clamp, a 1/4-20 bolt,
and a nut.
Tools Required
3/8” and 7/16” hex wrenches or sockets
Hardware Used Qty
3/4” P-clamp 1
1/4-20 x 3/4” Flanged Hex Bolt 1
1/4-20 Flanged Lock Nut 1
6.2 Route the drain tube straight down towards the
bottom of the mower, making sure the end of the
tube is below the frame, and the tube is not near
any moving parts.
6.3 Remove the console from the right side fuel tank.
Route the yellow wire from the A/C harness under
the fuel tank and through the opening for the
console. Connect the yellow wire to the free
orange wire on the underside of the console
(keyed power). See Fig 6.3. Re-attach the console
to the fuel tank.
Tools Required
5/32 Allen wrench
6.4 See fig. 6.4. Route the main trunk of the A/C
harness to the left and behind the battery. Attach
the ring terminals on the three red and orange
wires to the bolt on the positive battery terminal.
Place the rubber protective boot back over the
positive teminal as neatly as possible.
Tools Required
7/16” wrench or socket
6.5 Connect the three black wires with ring terminals
under the head of the bolt for the negative battery
terminal, but do not re-connect the negative
terminal at this time.
Fig. 6.3 (Keyed power connection)
Fig. 5.1 (A/C compressor bracket)
Fig. 6.1 (A/C wire harness)
Fig. 6.4 (Positive wire connections)
3/8” bolts
(nuts on outside)
1/2” ROPS bolt
Attach
harness with
P-clamp here
Orange Wire

CAB INSTALLATION
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Step 6: (A/C and Cab Wiring, continued)
6.6 Route the A/C harness towards the rear of the
mower, between the engine and compressor
mount, then out through the bottom of the “F” on
the side of the mower rear body.
6.7 See Fig. 6.7. Connect the bullet terminal from the
harness to the compressor, and attach the ground
lug to the bolt at the bottom-front of the
compressor.
Tools Required
3/8” and 7/16” hex wrenches or sockets
6.8 See fig. 6.8. Connect the 2-pin connector from the
voltage regulator attached to the rear frame of the
cab, to the 2-pin connector from the main A/C wire
harness. Connect the black wires with ring lugs
under the nut on the left side of the regulator.
Tools Required
3/16” Allen key or driver
7/16” hex wrench or socket
6.9 See fig. 6.9. Connect the 4-pin connector from the
regulator harness to the connector from the
voltage regulator . Connect the other end of the
harness to the dynamo mounted to the
compressor bracket.
6.10 See fig. 6.10. Use wire ties to secure the A/C
harness inside the cab, keeping wires away from
any moving parts, especially the fan and belt.
Make sure the yellow wire with bullet terminal from
the A/C harness, located near the battery, is
accessible. This will be used for cab accessories.
6.11 See fig. 6.11. Secure the wires for the Voltage
regulator together, and to the fuel hoses near the
fuel cutoff switch. Orient the fuse holders so that
the fuses will be accessible once the covers are
put on the engine.
6.12 See fig. 6.12. Secure the compressor and dynamo
wires to other wires next to the engine. Make sure
the wires can’t contact any hot or moving parts.
6.13 Carefully cut the excess tails from all wire ties.
Tools Required
Wire cutters or snips
Fig. 6.8 (Voltage Regulator Connections)
Fig. 6.7 (Compressor connections)
Fig. 6.9 (Dynamo connections)
Bullet
terminals
Ground lug
Dynamo
Regulator
connector Dynamo
harness
Voltage
Regulator
Ground
lugs
Connector for
A/C harness
Connector for
dynamo
Fig. 6.10 (Secure wires under seat) Fig. 6.11 (Secure regulator wires) Fig. 6.12 (Secure compressor wires)
Wire Ties
Wire Ties
Wire Ties
Fuses

CAB INSTALLATION
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Step 7: (A/C V-belt)
7.1 See fig. 7.1. Install the Flywheel Shroud Mount to
the engine housing using 3 of the 4 M6 screws
removed in step 1.3, and to the compressor mount
with three 1/4” bolts and fender washers.
Tools Required
10mm hex wrench or socket
3/8” and 7/16” hex wrenches or sockets
Hardware Used Qty
1/4-20 x 3/4” Flanged Hex Bolt 3
1/4” x 1” Steel Fender Washer 3
7.2 Loosen the left bolt on the dynamo attached to the
A/C compressor bracket and rotate the dynamo
counter clockwise to move the bolt forward in the
slot.
Tools Required
13mm Wrench or Socket
7.3 See fig. 7.3. Place the V-belt from the hardware kit
over the upper grove of the compressor pully, over
the dynamo pully and over the new pully on the
engine crankshaft. Rotate the dynamo clockwise
until the V-belt is tight, then tighten the left
dynamo bolt snug.
7.4 Check the tightness of the V-belt by placing a
straight edge tangent to compressor pulley and
dynamo. Place belt tension tester in the center
and perpendicular to the belt between the (2)
pulleys and next to the straight edge. Push the
tensioner towards the theoretical center making
sure that a deflection force of 3.1 lbs. gets 0.2
inches of belt deflection at the center of the belt.
See Figure 7.4.
Tools required
13mm wrench or socket
Belt tension tester
Straight edge
Fig. 7.3 (Install V-belt)
Fig. 7.4 (Compressor V-Belt Tension)
Fig. 7.1 (Flywheel shroud mount)
M6 bolts
1/4-20 bolts
and washers
Engine Pulley
Straight Edge
Belt Tension Tester
Compressor Pulley
Set belt deflection distance to 0.2 inches
Set belt deflection force to 3.1 pounds
Ref.: Center line
between pulleys
V-Belt
Dynamo Pulley
Dynamo Pivot Bolt
Dynamo Adjustment