Curtis KUBOTA B2650 Betriebsanleitung

INSTALLATION & OWNER’S MANUAL

Rev. D, p. 1 of 12

The contents of this envelope are the property of the owner.

Be sure to leave with the owner when installation is complete.

KUBOTA B2650/3350

Hard Sided Cab p/n 1KB33AS

Soft Sided Cab p/n 1KB33SS

Installation Instructions

APPROXIMATE INSTALLATION TIME: 2 to 3 HOURS

(excluding accessories)

Hard sided cab shown with optional work lights, and optional strobe light.

Additional options available are: heater, hard rear panel, and rear window wiper.

Note: a front windshield wiper comes standard with this cab kit.

p/n: IM-1KB33

Revised on: 12-1-2015

Note: photos for illustration purposes only.

Colors and features may vary.

DESIGN CONCEPT

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 instructions.

From all of us at Curtis, we thank you for choosing our product.

CAB INSTALLATION

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. Plastic washers have been supplied to provide a

weather seal under the heads of all exterior bolts.

The plastic washer should be installed under each

bolt head directly against the outside cab surface.

Care should be taken not to over tighten the fast-

eners and damage the plastic washer. Also use

steel washers as required. See diagram.

E. Apply a silicone sealant to seal any minor

gaps that may occur due to vehicle variations.

F. Use caution to avoid damaging the factory installed

threaded inserts. Begin the bolt engagement by hand

to avoid or correct potential cross threading.

TOOLS REQUIRED

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 Monoxide. 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.

p. 2 of 12

Fastener

Cab Surface

Steel Washer

Plastic Washer

Set of standard and metric sockets

Set of standard and metric open end wrenches

Drill

3/8" drill bit

Measuring Tape

Clamp

One Phillips Head Screwdriver

Scissors

One 3/8” Drive Ratchet

One 5/32” Allen Wrench (preferably “T” handle type)

One 3/16” Allen Wrench (preferably “T” handle type)

p. 3 of 12

1. VEHICLE PREP

1.1 Per fig. 1.1, remove the following five (5) items

from the tractor: the optional tool box and clamps from

the roll bar (if equipped), both grab handles, and both

turn signal lights from the fenders (identify the wires for

easier re-connection later). Save the turn signal lights,

washers, and nuts for re-use in step 13.

2. ROLL BAR BRACKETS

2.1 Per fig. 2.1, loosely install the roll bar brackets and

the roll bar mounts to the R.O.P.S. tubing (two places per

upright) (approximately where shown in relationship to

the removable pin for the fold-down R.O.P.S.. Ref.: the

center of the bolt hole should be approximately 14-1/2”

up from the fender and 36-1/2” up from the fender. When

left loose, these units will be able to slide up or down to

match the exact mounting holes in the back of the side

frames. Orient as shown for the right side and opposite

for the left side. Use the following hardware per setup:

one 5/16” x 1” long carriage bolt and one locknut. The

locknut is to be towards the outside of the tractor.

Fig. 1.1 (remove these items from tractor)

14-1/2” up from fender

Fig. 2.1 (roll bar bracket on right side of vehicle)

locknut here

(outboard)

p. 4 of 12

3. HARD REAR PANEL

Note: this is a separately purchased option on soft sided cabs.

It’s a standard included item on hard sided cabs. If installing

on a SS cab, remove snaps from rear edge of roof.

3.1 If not installing a hard rear panel, skip to step 4 below.

3.2 See fig. 3.2. With assistance, place the hard rear panel

on the tractor in front of the R.O.P.S. tubing oriented as

shown with the window towards the rear. The bulb rubber on

the bottom of the left and right sides should be pointing for-

ward. NOTE: per the inset picture in the top left hand corner

of fig. 3.2, be sure both removable pins for the fold-down

R.O.P.S. are oriented for easy outboard pin removal once the

optional hard rear panel is bolted in place.

4. COWL

4.1 Per fig. 4.1, position the cowl over the hood of the

tractor oriented so the top channel bend is towards the rear of

the tractor (fig. 5.1.1 also shows the orientation). The bulb

rubber seal around the hood area should be positioned to

point towards the seat. As shown in fig. 5.1, the lower bent

flange on the cowl sits on top of the rubber floor mat (not

under it).

5. SIDE FRAME

For ease of installation, remove the doors from side frames

by opening and lifting up off of pin hinges with the aid of an

assistant.

5.1 Per fig. 5.1, install the left side frame so the floorboard

sits on top of the rubber floor mat and on top of the bent

flange on the lower portion of the orange cowl as shown. Per

fig. 5.1.1, the mounting tab that is welded on to the side

frame fits into the bent channel on the cowl as shown. The

bulb rubber that seals against the rear fender should be point-

ing outboard to minimize covering the factory installed de-

cals.

Fig. 3.2 (view from front left side of tractor)

Fig. 4.1 (view from front left side of tractor)

Fig. 5.1 (view from rear left side of tractor)

bulb rubber

to point

towards the

seat

bent flange

on cowl

Fig. 5.1.1 (view from front left side of tractor)

mounting

tab is in here

hard rear

panel

bulb rubber

to point for-

ward

p. 5 of 12

5. SIDE FRAME (cont’d.)

5.2 Per fig. 5.2, use the following hardware installed

horizontally into the front of the side frame tubing (into

factory installed threaded inserts): three 5/16 x 3/4” long

button head bolts, three nylon washers, and three steel

washers. See helpful hint “D” on page 2 for proper place-

ment of nylon/plastic washers. Use caution to avoid

damaging the factory installed threaded inserts. Begin the

bolt engagement by hand to avoid or correct potential

cross-threading. Do not tighten bolts.

5.3 Per fig. 5.3, clamp the top corner of the cowl to the

side frame to assist in lining up the holes for the vertical

bolt. Use the following hardware in this location: one

5/16 x 3/4” long button head bolt, one steel washer, and

one locknut. The head of the bolt is to be up top as

shown. Tighten bolt and remove clamp.

5.4 Per fig. 5.4, attach the back side of the side frame to

the roll bar bracket assembly. Note: fig. 5.4 shows an

optional hard rear panel in place. Use the following hard-

ware in each of the four roll bar bracket assemblies: one

5/16 x 1” long button head bolt, one nylon washer, and

one steel washer. Thread into the factory installed thread-

ed inserts in the rear of the side frame tubing. Do not

tighten bolts.

5.5 For the remaining two threaded inserts per side

(one up top and one down bottom) on the back of the side

frame, leave them open if not installing a hard rear panel.

If installing a hard rear panel, use the following hardware

per side: two 5/16 x 3/4” long button head bolts, two ny-

lon washers, and two steel washers. Thread into the fac-

tory installed threaded inserts in the rear of the side frame

tubing. Do not tighten bolts.

5.6 Repeat all of section 5 for the opposite side frame.

5.7 Per fig. 5.7, new decals can be obtained from

Kubota and repositioned on the tractor if required.

Fig. 5.3 (view from front right side of tractor)

clamp here

head of vertical bolt

Fig. 5.4 (view from rear right side of tractor)

hard rear

panel

Fig. 5.7 (view from center of tractor)

Fig. 5.2 (view from front left side of tractor)

install

bolts

here

nylon washer, steel

washer, head of bolt

p. 6 of 12

6. WINDSHIELD SUPPORT

6.1 See fig. 6.1. With assistance, install the windshield

support to the top front corner of the side frames oriented

as shown with the bent flanges on the bottom. In the low-

er holes only, use the following hardware per side frame:

one 5/16 x 1” long button head bolt, one steel washer,

one nylon washer, and one locknut. Refer to the helpful

hints section on page two for the proper placement of the

nylon washer. Do not tighten bolts. Note: the upper hole

on each side will get hardware once the roof is installed.

7. WINDSHIELD

7.1 See fig. 7.1. Have the following items ready: four

5/16 x 1-3/4” long flat head bolts, four locknuts, and two

plastic spacer blocks. With assistance, install the wind-

shield hinges to the windshield support with the two

spacer blocks between the hinge and the windshield sup-

port. Attach windshield latches to windshield latch re-

ceivers on the cowl by squeezing tabs to retract spring

loaded pins. See fig. 7.1.1. Lift up on bottom of wind-

shield and close latches. Check alignment of windshield

with side frames and tighten hinge hardware. CAU-

TION: hinges are plastic components. Do not over-

tighten hardware. Torque to 7 foot-pounds maxi-

mum. Also tighten both lower windshield support bolts

(from step 6 above).

Fig. 6.1 (view from front left side of tractor)

install

bolt

here

leave empty for now

Fig. 7.1 (view from front right side of tractor)

3/4” thick spacer block

Fig. 7.1.1 (view from center of tractor)

latch

receiver

p. 7 of 12

middle

side bolt

Fig. 8.3 (view from front left side of tractor)

rear corner bolt

ref.: reflectors are back here

Fig. 9.2.1 (view from left side of tractor)

heads of

bolts up top

8. ROOF

8.1 Use a Phillips head screwdriver to punch a hole

through the headliner at any of the covered bolt hole lo-

cations (8 places). Punch holes from the inside out to

avoid having the headliner pull away from its glued sur-

face.

8.2 Install the roof oriented so the reflectors are to-

wards the rear of the vehicle. Use the following hardware

in the two front corners: one 5/16 x 1” long button head

bolt, one steel washer, one nylon washer, and one lock-

nut (locknuts on the inside surface). Install the bolt

through the roof, windshield support, and mounting tab.

See the helpful hints section on page two for placement

of nylon washers.

8.3 See fig. 8.3. The middle side and rear corner bolt

location on both the left and right sides uses the follow-

ing hardware per side: two 5/16 x 3/4” long button head

bolts, two steel washers, and two nylon washers. These

bolts are installed into factory installed threaded inserts

in the top of each side frame. NOTE: use caution to

avoid damaging the internal threads on the factory in-

stalled threaded inserts.

8.4 The remaining two holes in the middle front use the

following hardware: two 5/16 x 3/4” long button head

bolts, two steel washers, two nylon washers, and two

locknuts. Locknuts to be on the inside surface.

9. TIGHTEN ALL BOLTS

9.1 Tighten all bolts at this time including the carriage

bolts on the roll bar brackets, etc.. Note: the roll bar

brackets should end up parallel and/or perpendicular to

the R.O.P.S. tubing.

9.2 Per figures 9.2 and 9.2.1, use the two holes in the

side frame floorboard as a guide to drill 3/8” diameter

holes through the floor of the tractor. WARNING:

check underneath for obstructions before drilling.

With assistance, depress the inner-most brake pedal to

gain clearance for the drill to be vertical when drilling

the front right bolt hole. Install the following hardware

per side: two 5/16 x 1” long button head bolts, two steel

washers, and two locknuts. Locknuts to be underneath

the tractor. Tighten these bolts.

Fig. 9.2 (view from seat of tractor)

drill a

3/8” hole

p. 8 of 12

10. REAR CURTAIN

If installing a hard rear panel, skip this step and continue

with step 11 below.

10.1 Assemble the six (6) snaps on the rear curtain to

the six (6) snaps on the back side of the roof.

10.2 Dry fit the sides of the rear curtain to the wide in-

ner surface of the side frame rear vertical tubing as

shown in fig. 10.2. Install the supplied 1” wide hook vel-

cro to a clean, dry surface at room temperature for best

adhesion. Attach the curtain to the newly installed velcro.

11. UNDER SEAT FILLER

11.1 Per fig. 11.1, tip/raise the seat forward and position

the under seat vinyl filler as shown with the seat belt

bracket passing through the slit openings on each side.

Dry fit this and estimate where to apply the supplied 1”

wide hook velcro to the fenders, etc.. Reminder: for best

adhesion, apply self-adhesive backed velcro to clean, dry

surfaces at room temperature. The top middle section of

the under seat filler attaches to the bottom of the soft rear

curtain or to the bottom inside surface of a hard rear pan-

el as shown in fig. 11.1.1. For the hard rear panel, install

more of the supplied 1” wide velcro to suit.

Fig. 10.2 (view from center of tractor)

2” wide inner surface

of side frame rear

vertical tube

Fig. 11.1 (view from left side of tractor)

seat belt

bracket

opening

Fig. 11.1.1 (view from left side of tractor)

hard rear panel

is shown here

p. 9 of 12

12. DOORS

12.1 Apply grease to the pin hinges. With assistance, re

-install the doors onto the pin hinges. Work the doors

back and forth until the hinges are completely seated. If

necessary, specific adjustments can be made per the steps

below. Note: the top of the door should end up visually

parallel with the side of the roof. Note: the door latch is a

rotary type with two positions to close. Adjust door so

that when fully closed door latch clicks twice for total

engagement.

Per fig. 12.2, the large striker bolt and nut can be loos-

ened and reset higher or lower, in or out for better en-

gagement and door seal. Use two 19mm open end

wrenches. Note: finger guard to end up being centered

and facing inward.

Per fig. 12.3, the 1/4” hex head bolts on the door hinges

can be loosened on the rear tube, or on the door itself, or

in both places, in order to rotate or move the door up or

down and forward or backward as necessary for proper

alignment with side frame. Note: An assistant will be

needed for this step. Keep the hinge sleeves fully seated

on the pin hinges. Tighten all hinge bolts using caution to

not over tighten. Over tightening will crush (damage) the

structural tubing. Torque to 40 inch-pounds.

Per fig. 12.4, the inside latch can be moved forward or

back for proper engagement with the striker bolt. Loosen

the two hex head bolts shown to move the latch. Re-

tighten bolts.

CAUTION: FOR SAFE OPERATION, DO NOT

DRIVE WITH DOORS OPEN. MAKE SURE

DOORS ARE CLOSED AND PROPERLY

LATCHED WHEN DRIVING.

For soft sided doors, install the supplied vinyl coated

cable door stops between the upper bracket on the doors

and the upper bracket on the side frames. Use the follow-

ing hardware: four 5/16 x 3/4” long hex head bolts, eight

steel washers, and four locknuts. Do not tighten down

firmly. Allow for free pivoting.

For hard sided doors, install the supplied gas shocks to

the factory installed ball studs on the side frames and

doors with the small piston end towards the door.

Fig. 12.2 (view of striker bolt assembly)

Fig. 12.3 (exterior view of right side door)

Fig. 12.4 (interior view of right side door latch)

RIGHT

p. 10 of 12

13. TURN SIGNAL LIGHTS

13.1 Per fig. 13.1, re-install the turn signal light to the

welded bracket on the back side of the side frames. Use

the supplied wires to connect to the existing wiring un-

derneath the fender (see fig. 13.1.1). Repeat for opposite

side.

14. WINDSHIELD WIPER

14.1 Install the wiper motor per the installation instruc-

tions included with the wiper kit.

15. FINISHING TOUCHES

15.1 Peel protective film from the windows.

15.2 Install the supplied nut covers on the interior lock-

nuts (qty.: 20).

16. CARE AND MAINTENANCE

16.1 Once the doors are properly adjusted, lubrication

(preferably grease) can be applied to the striker bolts and

door latch assemblies. Re-apply periodically as needed

(same goes for the door pin hinges as necessary).

16.2 Check and tighten hardware after 40 hours of op-

eration. Periodically inspect and tighten hardware for the

remainder of the unit’s life.

16.3 Wash the painted surfaces of the unit with com-

mercial automotive cleaning products.

16.4 Clean windows with glass cleaner.

16.5 Vinyl components should be washed with a mild

solution of warm soapy water.

16.6 Clear vinyl can be easily scratched. Be careful

cleaning frost or snow from rear curtain. Do not roll cur-

tain in cold weather. The curtain becomes stiff and may

crack. Keep curtain clean.

Fig. 13.1 (view from rear left side of tractor)

both washers and nut on this side

Fig. 13.1.1 (view from rear right side of tractor)

connect wires

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