Kubota RTV 400 CAB Operating instructions

INSTALLATION & OWNER’S MANUAL
Rev. C, p. 1 of 18
KUBOTA RTV 400 CAB
(Not for use on RTV 500)
These instructions are for installation of the
complete cab as well as the modular components.
INSTALLATION TIME for entire cab: 1 to 1 1/2 HOURS (excluding any accessories)
DESCRIPTION: PART NO.:
Complete Cab Kit V4409 / 77700-V4409 (this contains all 5 kits listed below)
Mount Kit V4310 / 77700-V4310 (required to install any of the following individual kits)
Windshield Kit V4368 / 77700-V4368
Rear Panel Kit V4428 / 77700-V4428
Roof Kit V4312 / 77700-V4312
Door Kit V4429 / 77700-V4429
This cab has been modularly designed so that components may be quickly detached and
attached depending upon conditions. Any component may be used independently with
the required Mount Kit (p/n: V4310).
Manual p/n: 77700-03686
(Revised: 10/31/2017)

SAFETY INFORMATION:
!WARNING: 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. Never operate the vehicle outside of its rated weight capacity.
!WARNING: 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.
!WARNING: Serious injury or death:
 This cab enclosure does not provide protection from rollover or other accidents.
 This cab enclosure does not provide protection from flying objects including golf balls.
 This cab enclosure does not provide protection from lightning. When lightning threatens, take
cover and do not operate vehicle.
SAFETY LABELS:
Safety Label Location:
See the illustrations on the following page for complete text of safety label message:
1) WARNING - K7561-65412
2) WARNING - CUR192
NOTICE: item (3) is located in 4 places total, on each side of the panel as shown.
3) CUR193
4) Decal: OHSA ROPS serial number
NOTICE: The ROPS (Roll-Over Protective Structure) serial number label is covered by the
cab and may be viewed by removing the rear panel.
5) WARNING - 77700-03684
p. 2 of 18

SAFETY LABELS:
1) WARNING - K7561-65412 2) WARNING - CUR192
3) CUR193
4) Kubota ROPS serial number
5) WARNING - 77700-03684
TOOLS REQUIRED:
p. 3 of 18
Set of standard and metric sockets
Set of standard and metric open end wrenches
One 3/8” Drive Ratchet
One 3/16” Allen Wrench (preferably “T” handle
type)
Needle Nose Pliers
!WARNING:
K7561-65412
TO AVOID PERSONAL
INJURY OR DEATH:
1. Do not remove Roll-Over
Protective Structures
(ROPS) for any
application.
2. Do not modify or repair
a ROPS because
welding, grinding,
drilling or cutting any
portion may
weaken the
structure.
WARNING:
PINCH
POINT
PULL PINS TO OPEN & CLOSE COWL
!WARNING:
To Prevent Serious Injury or Death.
This cab has been tested and approved for the RTV400 only.
Use of this cab on other models could result in excessive carbon monoxide exposure.
Do not remove or alter this tab. 77700-03684
CAB INSTALLATION
BEFORE YOU START
HELPFUL REMINDERS:
A. Refer to the parts diagram towards the back of each
section 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. Use caution to avoid damaging the factory installed
weld nuts or threaded inserts. Begin the bolt
engagement by hand to avoid or correct potential
cross threading.
KUBOTA
Manufacturing of
America Corp. Gainesville GA.
Machine Model No.
RTV500 / RTV400ci
ROPS MODEL
No.
SFRTV-5
ROPS Serial
No.
XXXXX
ROPS Gross Machine Weight
2314 lbs. (1050 kg)
ROPS meets requirements of
*OHSA Part 1928.52
*SAE J1124

p. 4 of 18
1.1 Per fig. 1.1, if installing just a roof by itself, use just
the upper mounts shown (not the front mounts or the bush-
ings). If installing a windshield or doors, use all the mount kit
components shown.
1.2 Per fig. 1.2, remove and discard the four (4) original
equipment bolts and washers from the cross members on the
driver’s side. New bolts and lock washers are provided. Loos-
en the four (4) bolts securing the passenger side, but leave
them installed at this time. Install the upper mount oriented as
shown in figure 1.2. Install the new bolts (M10 x 1.25 x
35mm long) and split spring washers (M10) into the original
equipment factory installed weldnuts (not shown). Use cau-
tion to avoid cross threading the weldnuts. Start thread en-
gagement by hand. Leave bolts loose.
1.3 Per fig. 1.3, if not installing a door kit, you will not
have the hinge plate mount. If installing a door kit at this time,
orient and install the hinge plate mount from the door kit as
shown. Fasten the rear of the upper mount using the new bolts
(M10 x 1.25 x 35mm long) and split spring washers (M10).
Use caution to avoid cross threading the weldnuts. Start thread
engagement by hand.
1.4 Repeat steps 1.2 and 1.3 for passenger’s side.
1.5 Torque all eight (8) bolts to 48-55 N-m, 36-41 ft-lbs, or
4.9 to 5.7 kgf-m.
1.6 If installing just a roof, these two upper mounts are the
only mount kit components necessary. Proceed directly to the
roof section on page 12.
Fig. 1.1 (contents of mount kit)
MOUNT KIT (p/n: V4310 / 77700-V4310)
This kit is required to mount the cab
or any of the individual assemblies.
Fig. 1.2 (view of inside front corner of driver’s side)
remove and discard original
bolts and washers from here
Fig. 1.3 (view of inside rear corner of driver’s side)
remove and discard original
bolts and washers from here
hinge plate mount (used
only if installing a door kit)

p. 5 of 18
1.7 Per fig. 1.7, remove and discard the two original
equipment bolts and nuts from the front ROPS (Roll-
Over Protective Structure) tubing. New bolts, nuts, and
steel bushings are provided. Have the following hard-
ware ready: two 3/8-16 x 1-3/4” long button head bolts,
two steel bushings, and two locknuts (3/8-16). Per fig.
1.7, orient and install the front mount on the driver’s side
as follows: the steel bushings are to be installed in the
upper outside cavity and the lower inside cavity. These
are to fill voids and support the ears on the front mount.
See fig. 1.7.1 for a completed view of this assembly. In-
stall the new nuts into the open cavities. Install the new
bolts through the ears of the front mount, through the
steel bushings, through the ROPS tubing and engage into
each of the locknuts.
1.8 Repeat step 1.7 for passenger’s side.
1.9 Torque these four (2/side) front mount bolts to 48-
55 N-m, 36-41 ft-lbs, or 4.9-5.7 kgf-m.
Fig. 1.7.1 (view of driver’s side front mount from driv-
er’s seat)
Fig. 1.7 (view of driver’s side from driver’s seat)
remove and discard
original equipment
bolts and nuts from
this joint
ears
bushing
locknut
ref.: inside surface
of ROPS tubing)
note: steel bushing
is underneath this
sheet metal ear
ref.:
nut
ref.: this tab to
be down here
as shown

P. 6 OF 18
PARTS LIST
V4310 / 77700-V4310 RTV 400 MOUNT KIT

2.1 Fig. 2.1 shows the only item included in the wind-
shield kit. Note: inside view of windshield assembly shown.
2.2 Orient the windshield as shown in fig. 2.1. Hook the
two upper pins into the receiving slots in the front of the up-
per mounts (see fig. 2.2). Snap the lower two latches onto
the pins on the inside of the front mounts until they are fully
engaged. Two (2) clicks means fully engaged. If adjustment
is needed, use a 3/16” Allen wrench and a 1/2” open ended
wrench to reposition the pin in the slotted front mount.
2.3 Three areas are adjustable if a better seal is desired.
First be sure that the upper pins are seated at the bottom of
the receiving slots in the upper mounts before beginning any
adjustments. The lower latches have adjustment in and out
(see fig. 2.3). The lower pins on the front mounts have ad-
justment up and down. The upper pins have adjustment in all
directions due to an oversized hole. Make the necessary ad-
justments until you achieve “double click” engagement. If
the issue is with the seal against the ROPS tubing, adjust the
lower latches in or out. If the issue is with the seal against the
hood, adjust the pins up or down.
p. 7 of 18
WINDSHIELD KIT (p/n: V4368 / 77700-V4368)
Note: Mount Kit (p/n: V4310) is required
in order to mount this windshield kit.
Fig. 2.2 (description of slot usage)
ref.: slots for roof installation
slots for windshield installation
Fig. 2.3 (view from inside of driver’s side)
use an Allen wrench here to adjust
slotted
for
adjust-
ment
Fig. 2.1 (contents of windshield kit)

2.4 Note: the entire bottom portion of the windshield
assembly is designed to pivot up and out of the way when the
hood needs to be opened. On each side of the cowl there is a
finger pull pin. Disengage and re-engage accordingly. Note:
it may be necessary to squeeze the cowl to compress the rub-
ber gasket in order to get the pins to re-engage.
2.5 Tip: removal of any component that has latches can
be made easier for a single person if the latch is opened to
disengage the receiving pin then manually closed as shown
in fig. 2.5 so the weight of the component does not cause the
latch to continually re-engage on the receiver pin when you
try to work the opposite side of the vehicle by yourself. Push
at location “c” to close and pull at location “o” to open. Be
sure to open latches before re-installing.
p. 8 of 18
Condition: Explanation/Solution
Latches will not double click Be sure upper pins are fully
seated in slots of upper mounts.
Move latches backward in slots.
Gap along ROPS at bottom Move latches forward.
Gap along ROPS at top Move upper pins forward.
Gap along hood Move latches forward.
Move lower pins down.
Move upper pins up.
Troubleshooting the windshield
Fig. 2.4 (hood access)
finger pull pin
Fig. 2.5 (latch shown closed)
location “o”
to open
location “c”
to close
CLOSED

P. 9 OF 18
V4368 / 77700-V4368 RTV 400 WINDSHIELD KIT
PARTS LIST

p. 10 of 18
3.1 Fig. 3.1 shows the contents of the rear panel kit.
Note: inside view of rear panel assembly shown.
3.2 Loosen the two bolts of the rear panel lower
mount assembly to allow the inner and outer brackets to
slide freely.
3.3 Lift the dump bed. Per fig. 3.3, install the rear
panel lower mount assembly as follows: insert the spring
clip nut into the empty hole above the upper center seat
back bolt (oriented so the threads are towards the front of
the vehicle), temporarily remove the upper center seat
back bolt, place the rear panel lower mount assembly in
position and oriented as shown, re-install the original
equipment seat back bolt into the lower slot. Use caution
to avoid cross threading the threaded insert. Start thread
engagement by hand. Install a new 1/4-20 x 3/4” long
hex head bolt and 1/4” steel flat washer into the upper
slot of the assembly (engaging the threaded spring clip
nut). Tighten both bolts.
3.4 Orient the rear panel assembly with striker pins
toward the inside of the cab. Per fig. 3.4, hook the two
upper pins into the receiving slots in the rear of the upper
mounts. Install two 1/4-20 x 3/4” long hex head bolts and
two 1/4” steel flat washers through the bracket in the rear
panel into the outer bracket to the rear panel lower mount
and tighten. Be sure top pins are fully seated and tighten
the two bolts of the lower mount assembly.
3.5 Peel protective film off window.
REAR PANELKIT (p/n: V4428 / 77700-V4428)
Note: Mount Kit (p/n: V4310) is required
in order to mount this rear panel kit.
Condition: Explanation/Solution
Gap along ROPS at top Move lower mount outer
bracket down.
Gap along ROPS at bottom Move rear panel forward.
Rear Panel and Mount Assembly Move lower mount outer
don’t line up bracket left or right.
Troubleshooting the rear panel Fig. 3.3 (view from rear of passenger’s side)
original
equipment
seat back
bolt
new bolt, washer, and
spring clip nut
ref.: bed of vehicle
Fig. 3.1 (contents of rear panel kit)
Fig. 3.4 (view of upper rear driver’s side)
slot for
rear
panel
pin

V4428 / 77700-V4428 RTV 400 REAR PANEL KIT
PARTS LIST
P. 11 OF 18

p. 12 of 18
ROOF KIT (p/n: V4312 / 77700-V4312)
Note: Mount Kit (p/n: V4310) is required
in order to mount this roof kit.
Condition: Explanation/Solution
Latches will not double click Move latches down.
Make sure bulb rubber along top side is
seated down fully onto sheet metal edges.
Won’t seal along top Move latches up.
Move front pins up.
Too tight along top Move latches down.
Move front pins down.
Latch and pin doesn’t line up Move front pins forward or backwards.
Troubleshooting the roof
4.1 Fig. 4.1 shows the only item included in the roof kit.
Note: inside view of roof assembly shown.
4.2 Orient the roof so the two quick attach pins are fac-
ing forward and the latches are facing the rear of the vehicle.
Hook the pins into the receiving slots towards the front of the
upper mounts and push down and forward to fully engage in
the slots. See fig. 4.2 for the correct slots to engage in. Snap
the latches onto the pins located on the rear of the upper
mounts until they are fully engaged. Two (2) clicks means
fully engaged.
4.3 To achieve a better seal or to achieve a “double
click”, the latches can be adjusted up or down. The pins can
be adjusted in all directions due to an oversized hole.
4.4 Tip: removal of any component that has latches can
be made easier for a single person if the latch is opened to
disengage the receiving pin then manually closed as shown
in fig. 4.4 so the weight of the component does not cause the
latch to continually re-engage on the receiver pin when you
try to work the opposite side of the vehicle by yourself. Push
at location “c” to close and pull at location “o” to open. Be
sure to open latches before re-installing.
Fig. 4.1 (contents of roof kit)
Fig. 4.2 (description of slot usage)
slots for roof installation
ref.: slots for windshield installation
Fig. 4.4 (latch shown closed)
location “o”
to open
location “c”
to close
CLOSED

V4312 / 77700-V4312 RTV 400 ROOF KIT
PARTS LIST
P. 13 OF 18
INSIDE VIEW OF ROOF ASSEMBLY

p. 14 of 18
5.1 Fig. 5.1 shows the contents of the door kit.
5.2 Note: the hinge plate mounts may have already
been installed in step 1.3 on page 4 during the mount
installation steps. If installing a door kit at a later date
than the mount kit, temporarily remove the two bolts and
washers shown in fig. 5.2. Loosen the bolts on the oppo-
site side, but do not remove them. Orient and install the
hinge plate mount as shown. Use caution to avoid cross
threading the weldnuts. Start thread engagement by hand.
Torque these two bolts to 48-55 N-m, 36-41 ft-lbs, or 4.9
-5.7 kgf-m.
5.3 Per figures 5.3 and 5.3.1, remove and discard
three original equipment plastic pine tree clips from each
outboard side of the vehicle floor and install the supplied
floorboards. Position the floorboard in place and fasten
using the following hardware: three 1/4-20 x 3/4” long
Truss/Phillips head bolts and three 1/4-20 locknuts.
Locknuts to be underneath the vehicle. Tighten the bolts.
Fig. 5.3.1 (view from passenger’s side)
DOOR KIT (p/n: V4429 / 77700-V4429)
Note: Mount Kit (p/n: V4310) is required
in order to mount this door kit.
Fig. 5.1 (contents of door kit)
Fig. 5.2 (view of outside rear corner of driver’s side)
Fig. 5.3 (pine tree clips)
pine tree clips removed from here
relief for tube
hinge plate mount temporarily remove
and reuse these two
bolts and washers

p. 15 of 18
5.4 Install a door hinge plate to the outside of the rear
ROPS tubing as shown in fig. 5.4. Use the following
hardware: two 5/16-18 x 1” long button head bolts, four
steel flat washers (5/16”), four plastic washers (3/8”),
and two locknuts (5/16-18). Locknuts to be on the inside
of the cab. See fig. 5.4.1 for placement of plastic wash-
ers. Leave bolts loose.
5.5 Per fig. 5.5, fasten the lower portion of the door
hinge plate to the hip restraint tube using the ROPS U-
clamps provided and the following hardware: two 5/16-
18 x 1” long button head bolts, four steel flat washers,
four plastic washers (3/8”), and two locknuts (5/16-18).
Locknuts to be on the inside of the cab. Be sure to orient
the U-clamp so that the angle of the clamp is aligned
with the angle of the ROPS hip restraint tube that it fas-
tens to. See fig. 5.4.1 for placement of plastic washers.
Leave bolts loose.
NOTICE: The Restriction Plate on the Door Hinge Plate
per fig. 5.5.1 (Driver’s side only) is designed to prevent
assembly onto the RTV 500. Do not remove or alter this
plate.
5.6 Align rear edge of door hinge plate parallel with
vertical ROPS tube. Tighten all four bolts.
5.7 Repeat for passenger’s side.
5.8 Open the front portion of the sliding window on
each door to keep from being locked out of the cab.
5.9 Apply grease to the factory installed pin hinges
and install the doors by lining up the pin hinges on the
door with the hinge sleeves on the door hinge plate.
Work the doors back and forth until they are completely
seated on the pin hinges.
5.10 Close the door fully and determine if the door is
approximately centered to the ROPS tubing. If necessary,
loosen the pin hinges on the door and adjust as necessary.
Hinge holes are oversized for adjustment in all direc-
tions. Re-tighten the pin hinge bolts.
Fig. 5.4 (view of driver’s side)
button head
bolts and
washers
Fig. 5.5 (view of driver’s side)
button head
bolts and
washers
Fig. 5.9 (view of passenger’s side)
apply
grease
Fastener
Cab Surface
Steel Washer
Plastic Washer
Fig. 5.4.1 (placement of plastic washers)
Restriction
plate
Fig. 5.5.1 (view of driver’s side)

5.11 Per fig 5.11, adjust the acorn nut and jam nut on the door
handle plunger so that the plunger is as short as it can be. Use two
13mm wrenches. Further adjustment will be made in a later step.
5.12 The striker bolt on the front mount can be adjusted up or
down. The inside rotary latch on the door can be adjusted front to
back and in and out. Continue to adjust the engagement as neces-
sary until you get the door to fully seal and close with “two” audi-
ble clicks which is confirmation that the door is fully closed and
secure enough to drive. The latch should engage smoothly on the
pin. If contacting the top or bottom of the pin, adjust the pin in the
slot to avoid excessive pin wear. If the pin is at the bottom of the
slot during engagement, move it to the top of the slot, loosen the u-
bracket on the rear leg, and close the door so that two clicks are
heard. Re-tighten the u-bracket without opening the door. Once
tight, open the door and re-adjust the pin in the slot.
5.13 Any or all of the following four areas can be adjusted for
proper “double click” engagement: standard striker pin, inside rota-
ry latch, door pin hinges, and/or the hinge sleeves.
5.14 Once the latch is properly adjusted for “double click” en-
gagement, adjust the acorn nut so that it just misses the release on
the latch with 1 mm (1/32”) clearance. Tighten the jam nut against
the acorn nut to prevent it from loosening.
6. FINISHING TOUCHES
6.1 Peel protective film from windows and door decals.
6.2 Per fig. 6.2, install the gas shock to the top of the frame and
door so that the quick release end of the gas shock is attached to the
cab upper mount for easy removal of the doors.
6.3 Per fig. 6.3, install the supplied ROPS decal to the inside sur-
face of the driver’s side ROPS tubing as shown. Apply to a clean,
dry surface at room temperature.
6.4 Install the supplied Seal Kit per the instructions in that kit.
6.5 Install any optional, separately purchased accessories per the
installation instructions included with the specific kit (i.e.: wind-
shield wiper, work lights, strobe light, etc.)
Windshield Wiper p/n V4367
Work Lights p/n V4339
Strobe Light p/n V4318
p. 16 of 18
Fig. 6.2 (view of passenger’s side door)
Gas shock
Condition: Explanation/Solution
Latches will not double click Move latches in.
Latch and pin does not line up Move pin up or down.
(up and down) Loosen hinges and lower or raise the front of the door.
Latch and pin does not line up Move latch forwards or backwards. Loosen hinges and
(front to back) move door forwards or backwards.
Door does not seal Move latch out.
Trouble-
shooting
the door
Fig. 6.3 (view of driver’s side rear ROPS tube)
apply
new
decal
here
Fig. 5.11 (view of driver’s side door)
Acorn Nut
Jam Nut

PARTS LIST
V4429 / 77700-V4429 RTV 400 DOOR KIT P. 17 OF 18

IMPORTANT CLEANING INFORMATION
CAREAND MAINTENANCE
(IMPORTANT: Be sure to leave this page with the owner once installation is complete)
Check and tighten hardware after 20 hours of operation.
Periodically inspect and tighten hardware for the remainder of the unit’s service life.
Keep the enclosure components clean in order to prevent dust and dirt from forming an unat-
tractive film. The life of your windows, doors, and roof panels depends upon following these
care procedures:
WINDOWS:
1) NEVER USE AN ALCOHOL-BASED PRODUCT FOR CLEANING. Do not use WIN-
DEX, GLASS PLUS, FANTASTIC, etc. Use of these products will result in deterioration
of the windows.
2) Wash with a mild soap or detergent using your bare hands to free or dislodge any caked-on
dirt or other foreign particles.
3) A soft, grit-free cloth, sponge, or chamois may be used but only as a means of carrying wa-
ter to the windows.
4) The interior should be lightly dusted (NOT WIPED) with a clean soft cloth or chamois. The
cloth or chamois should be kept free of grit by frequent rinsing in clean water.
5) Grease and oil may be removed with kerosene.
6) Novus I and Novus II are recommended plastic cleaners and can be used to remove light
scratches.
DOORS AND ROOF PANELS:
1) NEVER USE AN ABRASIVE DETERGENT/VEHICLE CLEANER OR A WIRE BRIS-
TLED BRUSH. Do not use any CITRUS BASED CLEANERS such as orange or lemon.
Use of these products will cause the plastic to become permanently damaged.
2) Clean the plastic enclosure surfaces thoroughly with warm soapy water and a COTTON
cloth or chamois. Be sure to use mild soap, specifically a dish liquid or equivalent. Clean
in a light circular motion for best results.
3) Use EXTRA CAUTION when cleaning the interior of the enclosure. The interior is more
sensitive than the exterior because the exterior has an extra coating for U.V. stability.
4) Remove grease and oil with mineral spirits and a COTTON cloth or chamois.
The contents of this manual are the property of the owner.
Be sure to leave with the owner when installation is complete.
p. 18 of 18