Curtis 1KBX70AS Operating instructions

INSTALLATION & OWNER’S MANUAL
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Kubota BX 70 Series Cab
(fits BX2370, BX2670, and BX25D)
(p/n: 1KBX70AS Steel Cab)
(p/n: 1KBX70SS Vinyl Cab)
The contents of this envelope are the property of the owner.
Be sure to leave with the owner when installation is complete.
APPROXIMATE INSTALLATION TIME: 4 HOURS
(excluding accessories)
Rev. D
08/19/2016
p/n: IM-1KBX70
Steel Cab Shown
Standard equipment: Front Windshield Wiper.
Options available:
Interior Rear View Mirror (not shown) (p/n: 9PM3)
85 Degree Rear Wiper (20” Blade) (p/n: 9PWK8520F)
3” x 5” Oval LED Front Work lights (p/n: 9LEDW2)
Heater (p/n: 9PH20S18) (18 and 23 hp engines)
Heater (p/n: 9PH20S40) (26 hp engine)
LED Strobe Light (p/n: 9LEDS2)
Exterior Side View Mirrors (not shown) (9PM5)
Fuse Block Switch Panel (not shown) (9PSF1)
Front Plow/Blade (not shown) (1KBXFELB)

GENERAL INFORMATION BEFORE YOU START
HELPFUL HINTS:
A. Refer to parts diagram toward the back of this manual to help identify parts during the assembly process.
B. To assist with the cab installation, leave all bolts loose for later adjustment unless otherwise specified.
C. Read and understand all instructions before beginning.
D. Apply a silicone sealant to seal any minor gaps that may occur due to vehicle variations.
E. Use caution to avoid damaging the factory installed threaded inserts. Begin the bolt engagement by hand
to guard against potential cross threading.
F. Verify all hardware and cab parts are accounted for before beginning.
TOOLS REQUIRED:
Set of Standard Sockets (3/8” Drive)
One 3/8” Drive Ratchet
Long Socket Extension
Set of Standard Open End Wrenches
Set of Metric Open End Wrenches
Set of Standard Allen Wrenches
#2 and #3 Phillips Head Screwdrivers
Grease
Bar Clamp
CARE AND MAINTENANCE:
Check and tighten hardware after 40 hours of operation. Periodically inspect and tighten hardware for the remainder of the unit’s
life.
Wash with a mild soap or detergent using your bare hands to free or dislodge any caked-on dirt or other foreign particles.
Do Not use Windex or any other chemicals to clean plastic windows or vinyl components.
Be sure to regularly grease door hinge pins. Also lubricate moving parts in the door latches.
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NOTICE
Cabs, blades, and general accessories add
additional weight to the base vehicle.
Deduct the accessory’s total weight from
the vehicle’s rated capacity including
driver and passenger.
Exposure to Carbon Monoxide
can Cause illness, serious injury
or death. Never operate vehicle if
suspicious of Carbon Monoxide. Inspect exhaust
system for leaks monthly. Leaks can result from
loose connections, corrosion, cracks or other dam-
age to the exhaust manifold. If leaks are found,
repair or replace exhaust system. Do not use vehicle
until repair or replacement is complete.

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1. Disconnect the wiring and remove the amber flashers from the
mounts on the tractor. (They will be reinstalled onto the cab in a
later step)
2. Remove and discard the two carriage bolts at the front of the
floorboard on either side of the hood. (Note: Use a socket
extension for easiest access to the nut on the underside)
3. Remove and discard the two outer rear pine tree clips holding the floormat.
4. Remove and discard the two knobs from the ROPS. Replace
with the supplied bolts making sure to properly reinstall the U-
shaped retainer bracket that was removed with the knob.
Ref: Qty: Description:
A2Knob
B2U-Shaped Retainer Bracket
C2M10 x 1.25 x 25mm Hex Bolt
Remove
Flashers
Remove (2)
Carriage
Bolts
Remove (2) Rear
Pine-tree Clips
(1/Side)
A
CB

C - 2x
A
B
D - 2x
C - 4x
B - 4x
C
D
E
F
A
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5. Install the cowl over the front of the instrument panel and attach to the floorboard. (Note: Leave bolts finger tight)
Ref: Qty: Description:
A- Front of Tractor Floorboard
B1Cowl
C25/16-18 x 3/4” Flange Bolt
D25/16-18 Flange Nut (Locking)
6. Install the left sideframe/door assembly making sure that the rear roll bar bracket is positioned on the inside of the ROPS as
shown in step 7. (Note: Leave bolts finger tight)
Ref: Qty: Description: Ref: Qty: Description:
A1Left Sideframe D15/16-18 Flange Nut (Locking)
B45/16 Black Nylon Washers E11/4-20 x 3/4” Truss Head Phillips Bolt
C55/16-18 x 3/4” Flange Bolts F11/4-20 Flange Nut (Locking)

D - 4x B
C - 4x
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7. Install lower ROPS clamp. (Note: Leave bolts finger tight) A clamp may be used to aid installation.
Ref: Qty: Description:
A- ROPS Bar
B- Left Sideframe
C1Lower ROPS Clamp
D45/16-18 x 3/4” Flange Bolt
8. Repeat Steps 6 and 7 for Right Sideframe (Note: Leave bolts finger tight)
9. Install windshield support (Note: Leave bolts finger tight)
Ref: Qty: Description: Ref: Qty: Description:
A- Left Sideframe D45/16-18 Flange Nut (Locking)
B1Windshield Support E21/4-20 x 3/4” Truss Head Phillips Bolt
C45/16-18 x 3/4” Flange Bolt F21/4-20 Flange Nut (Locking)
A
C
D - 2x
F - 2x
E - 2x
A
B
D - 2x

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10. Install both left and right Upper ROPS Clamps (Left side shown) (Note: Leave bolts finger tight)
Ref: Qty: Description:
A- Left Sideframe
B2Upper ROPS Clamps
C45/16-18 x 3/4” Flange Bolt
D45/16-18 Flange Nut (Locking)
11. Tighten all bolts at this time. Use the sequence described.
2-Bolts attaching the cowl to the tractor floorboard.
8-Bolts on front vertical face of the cowl.
2-Bolts on top horizontal lip of the cowl (clamp top corner of the cowl tight to sideframe tube when tightening)
2-Bolts going into rear floorboard holes.
8-Lower ROPS Clamp Bolts
4-Upper ROPS Clamp Bolts (make sure that the inside dimension at the top of the sideframes in the rear measures 33 1/2”
or larger when tightening so that the lip bolted to the roof has clearance when the roof is closed)
6-Bolts attaching the windshield support
12. Install windshield to the windshield support.
(Note: leave bolts loose until next step)
Ref: Qty: Description:
A- Windshield Support
B1Windshield
C2Hinge Spacer Block
D45/16-18 x 1 3/4” Flat Head Phillips Bolt
E45/16-18 Flange Nut (Locking)
13. Attach windshield latches to the tabs on the cowl and flip
the latches inward to close the windshield tight. With
windshield tight, tighten the (4) flat head bolts installed in the
previous step. (Caution: Do not over-tighten. Plastic hinges
may crack)
B - x2
A
D - x4
C - x4
D - 4x
E - 4x
A
B
C - 2x

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14. Place the roof in position on top of the cab. The latches may not engage properly and will be adjusted in a later step.
Install the hinge pins as shown making sure the steel lip bolted to the rear of the roof is centered between the sideframes. To
easily adjust the roof, loosen the bolts for the hinge sleeves that were factory installed on the roof and adjust in the mounting
slots then tighten.
Ref: Qty: Description: Ref: Qty: Description:
A- Windshield Support E2Hinge Sleeve (Factory Installed)
B1Roof F41/4-20 x 3/4” Truss Head Phillips Bolt
C1Hinge Pin Left (Shown) G41/4-20 Flange Nut (Locking)
D1Hinge Pin Right (Not Shown)
15. Open and close the roof to make sure
that the steel lip at the back of the roof does not contact the sideframes. Once this is complete, attach the gas shocks to the
ball studs with the thin rod end forwards. Loosen the latch bolts and adjust the latches forwards or backwards in the slots to
obtain the best alignment with the pins on the sideframes.
Ref: Qty: Description: Ref: Qty: Description:
A- Roof Ball Stud C2Gas Shock (500N 13 3/4” Long)
B- Sideframe Ball Stud D2Roof Latch
A
B
C
G
F
E
AB
C - 2x
D - 2x

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16. Install the fuel cap cover.
Ref: Qty: Description:
A- Right Sideframe
B1Fuel Filler Cover
C25/16-18 x 3/4” Flange Bolt
17. Rear panel installation for hard rear panels: (Note: If installing a vinyl rear panel, skip this step)
Note: If the cab is being installed on a tractor with a pivoting seat, the
bottom edge of the rear panel must be modified to clear the seat latching bar.
Remove the rubber from the bottom edge and break off the two tabs. Re-
install the rubber and cut it at the two new openings.
Open the roof and install the rear panel. First, insert the upper pins into the
slots on the sideframes. Second, bring the latches in to the pins. Before
latching, check to be sure the latches and pins are aligned. The pin is
adjustable up and down and the latch forward and backwards.
Ref: Qty: Description:
A- Right Sideframe
B1Rear Panel
C1Upper Pin
D1Latch
A
C - 2x
B
1st
2nd
A
B
C
D

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18. For vinyl rear panels: (Note: This page is not required if you installed a hard rear panel)
Install (4) snaps along the rear lip of the roof.
Ref: Qty: Description:
A- Roof Rear Lip
B4Snaps
C410-32 Nut (Locking)
19. Attach the vinyl panel to the (4) snaps and also to the (2) snaps that are factory installed on the sideframes.
20. Using the panel as a guide, clean all areas where adhesive velcro will be attached.
21. Install velcro down each leg of the sideframes and across the rear of the tractor fender behind the seat.
A
B - 4x
C - 4x

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22. Re-install the flashers into the mounting tabs that are welded to
the back of the sideframe. Reconnect the wiring.
Ref: Qty: Description:
A- Left Sideframe
B1Flasher Mounting Tab
23. Remove the air intake screen below the steering wheel.
24. Remove the two plastic air dams at the
bottom to allow fresh air to flow to the
radiator from underneath the tractor.
Ref: Qty: Description:
A1Left Air Dam
B1Right Air Dam
25. Reinstall the screen, leaving the knob off.
26. Clean the edge of the screen for good
velcro adhesion. Also, be sure the velcro and
the screen are at room temperature for best
results.
27. Install the vinyl air intake cover with the
hole positioned at the threaded stud where the
knob was removed. Use the vinyl as a
locating guide for the adhesive hook. Re-
install the knob at this time.
Note: For summer use the vinyl air intake panel should be removed to allow more air flow to the radiator.
A
B
A
B
PLASTIC AIR DAMS
MUST BE REMOVED!

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28. Remove the SMV bracket from the tractor. Remove the SMV receiver from
the bracket and install on the newly supplied SMV bracket.
Ref: Qty: Description:
A- SMV Bracket
B- SMV Receiver
29. Install the new SMV bracket assembly on the tractor using the same OEM
hardware.
30. Install the windshield wiper per the supplied instructions.
A
B

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