Kubota KX91-3a Instruction manual

WORKSHOP MANUAL
KUBOTA EXCAVATOR
KX91-3S ·D , 101-3 D
Code No.97899-61260
KX121-3S ·D ,161-3S ·D
Minor change Chapter
U35S,U35-3S ·D , U45-3S ·D

Record of Revisions
Symbol Date Main Revised Points & Corrective Measures Person-in-charge
1
2
3
4

CONTENTS
I Sales Engineering Section............................................... I-1
A. Quick feature chart ................................................................................. I-2
B. Feature discriptions ................................................................................ I-4
C. New innovations ..................................................................................... I-6
D. Specifications: Super series (KTC, KCL, KTA-version).......................... I-7
II Service Engineering Section........................................... II-1
A. General outline ...................................................................................... II-2
B. Finger control service port system....................................................... II-22
C. Hydraulic system modification............................................................. II-57
D. Hydraulic circuit diagram ..................................................................... II-91
E. Engine upgrade ................................................................................. II-109
F. Electrical system................................................................................ II-114
This WSM minor change edition has been compiled to explain the main contents of the
minor change, such as new service port system, new auto-idle system, some hydraulic
system change, engine upgrade for KX161-3S, etc.
As for the service information which are identical to the machines before minor change,
please refer to the correspondent WSM.
EU-version
KX91-3D, KX101-3D,KX121-3D, KX161-3D
U35-3D, U45-3D
PP-version
KX91-3S, KX121-3S, KX161-3S
U35S, U35-3S, U45-3S
Note: EU-version is for KE, KUK, and KBM. PP-version is for KTC, KCL, and KTA.

I - 1
WSM Minor Change I Sales Engineering Section
I Sales Engineering Section
A. Quick feature chart..............................................................I-2
B. Feature discriptions.............................................................I-4
C. New innovations..................................................................I-6
D. Specifications: Super series (KTC, KCL, KTA-version) ......I-7

I - 2
WSM Minor Change I Sales Engineering Section
A. Quick feature chart
a. KX91-3S, KX91-3D, KX101-3D, U35S, U35-3S, U35-3D
Basic performance improved (new)
Greater working range of this class
(1) Maximum digging and dumping heights
(2) Maximum digging depth
Safeness upgraded
(1) Full-scale 4-post ROPS/FOPS
canopy
(3) Standard equipped with ROPS/
FOPS cabin (cab type)(with
steel-framed skylight)
(4) Engine neutral start
(5) Travel lock
(6) Master key-compatible immo-
bilizer (option)
Better maneuverability
(1) Service port local control (wrist rest type)
(2) Travel bi-speed button (dozer lever)
(3) Independent swing pedal on the left side (hydraulic pilot)
Operator’s comfort
enhanced
(1) Digital navigation system
(2) Heater with outside-air inlet
defroster
(standard on cab type)
(3) Cup holder
(standard on cab type)
(4) Optional headlights
(option on cab type)
Maintainability
(1) Hydraulic components collectively located
on the right machine side
(2) Right hood fully opened
(3) Sectional dozer hose, etc.

I - 3
WSM Minor Change I Sales Engineering Section
b. KX121-3S, KX121-3D, KX161-3S, KX161-3D, U45-3S, U45-3D
Larger fuel tank capacity
(KX91-3S, KX161-3S)
Thumb bracket adopted
(North America)
Service port knob control Digital navigation system adopted
North America, Australia, Europe
Greater engine output (KX161-3S)
New immobilizer system introduced
(Europe)
Travel bi-speed switch
(Dozer lever)
Independent swing pedal
on the right side
Sedimenter separately located

I - 4
WSM Minor Change I Sales Engineering Section
B. Feature discriptions
Safety
With our Engine Start Lockout System, the engine cranks only
when the safety levers are raised. Our safety Lever Lockout
System helps prevent unexpected excavator and attachment
movement when entering or exiting the unit. An Auto House
Parking Brake automatically locks the house in the position it
was in when the engine was shut off. This means that a swing
lock pin is no longer required, making the excavator more com-
pact during transport and secure when parked on an incline. And
an OSHA certified ROPS/FOPS canopy and cab protects
against rollovers or falling objects.
Boom operation
Kubota's Hydraulic Matching System allows easy,
simultaneous and smooth operations of the boom,
arm, bucket and house swing. Perfectly matched
speed, power and cylinder timing deliver extraordi-
nary responsiveness, even with the slightest oper-
ator movements or in the toughest conditions (The
KX121-3 and KX161-3 feature the Load Sensing
Hydraulic System).
Strongest bucket breakout force in its class
Kubota's Hydraulic Matching system is unmatched for power or
ease of use. Load sensing hydraulics, which automatically regulate
and distribute optimum oil amounts to each cylinder, make it ideal
for your toughest trenching projects or your lightest dozing tasks. In
any situation, you can always rely on the KX-3 Super Series for
complete work efficiency.
(Super series)
Wide Working Range
The KX-3 Super Series' powerful and responsive front working
group is perfect for all your digging, lifting and loading jobs.
Plus, with increases and improvements to our bucket
capacities, reach and digging depths, the Super Series exceed
many of the latest construction site requirements.

I - 5
WSM Minor Change I Sales Engineering Section
Operator comfort
Get total comfort from a spacious operating area that features ultra
quietness, deluxe climate control and a high back suspension-
engineered seat with adjustable wrist rests. Well-placed controls
and levers provide an increase in deck space and foot room. A
lowsound-level cab design reduces engine vibration to a minimum.
Our ergonomic seat and wrist supports adjust to your individual
posture. And with T.P.S.S. technology, change quickly between
ISO and SAE operating patterns without tools or leaving your seat,
and with only the flick of a switch. Combined, these advantages
reduce fatigue while helping to maintain your peak performance
(A/C available only on KX121-3 and KX161-3 models).
Easy maintenance
The KX-3 Super Series not only make
daily maintenance a breeze, but also
make more-detailed periodic mainte-
nance hassle-free as well. Wide opening
side and rear covers, as well as centrally
located components, give you quick and
easy access for the servicing of vital
areas like the engine, the fuel/water sep-
arator, the radiator, coolant, air filter, con-
trol valve and hydraulic tank.
KUBOTA engine
The ultra powerful, incredibly dependable
Kubota diesel engines deliver unmatched
horsepower while minimizing emissions
to meet EPA standards. They produce
quick starts in temperatures as low as -
4qF, low sound as well as low vibration.
They even then follow through with supe-
rior fuel-efficiency.
Extraordinary stability and lifting capacity
The KX-3 Series is equipped with innovative and superior counter balancing technology for
increased excavator stability. Long tumbler distance, a lower center of gravity and Double Outer
Flanged Lower Track Rollers combine to deliver safe and effective performance when working
over the side, with hydraulic attachments mounted or when lifting a broad range of heavy objects.

I - 6
WSM Minor Change I Sales Engineering Section
C. New innovations
DIGITAL PANEL
Informative, interactive and functional. Kubota's all-new liquid crystal display (LCD) panel
accurately shows easy-to-understand diagnostics and digital readings. The Kubota Intelli-
gent Control System (KICS) will even alert the operator to when routine maintenance is
due. Plus, when filling-up with fuel, the KICS informs the operator that the tank is nearly full.
The panel reduces excavator downtime and repair fees for a decrease in total operating
costs.
THUMB BRACKET
The optional hydraulic thumb opens up
opportunities for loading and material
handling tasks. It allows
you to pinch material
between the thumb and
bucket, retracting for
normal excavation.
Installation time is sig-
nificantly reduced with
the factory installed
BREAKER SWITCH
The breaker switch lets you man-
age the hydraulic breaker attach-
ment quickly, easily and without
having to reach for the control.
Repositioned from the floor, sim-
ple forefinger activation as well as
convenient thumb operation of the
hydraulic breaker is possible.
SHORT STROKE
OPERATING LEVER
The new operating levers require less
effort and shorter movement, increas-
ing control, responsiveness and com-
fort. With only the slightest flick of the
wrist, smooth excavator operation and
reduced operator fatigue are assured.
2 SPEED SWITCH
The new 2-Speed Travel Switch is
conveniently mounted on the dozer
lever for easier operation and con-
trol. It allows increased floor space
as well as advanced user-friendly
travel speed changes.
FUEL-WATER
SEPARATOR
The Water Separator has
been relocated to an easy to
reach position under the
improved Fuel Filter. This
gives the Super Series Models
with enhanced fuel and water
filtration, increased durability
and greater overall excavator
performance.
NEW WRIST RESTS
Set the new, custom adjustable
armrests to your favorite position, or
just move them out of the way.
Either way, they help reduce arm
movement and operator fatigue for
increased job efficiency.
USER-FRIENDLY OPERABILITY
Language selection display Information when service time comes Low fuel display

I - 7
WSM Minor Change I Sales Engineering Section
D. Specifications: Super series (KTC, KCL, KTA-version)
1.Main machine specifications
Model KX91-3S U35S / U35-3S KX121-3S KX161-3S
Type of ROPS/FOPS Canopy / Cab Canopy / Cab Canopy / Cab Canopy / Cab
Type of tracks Steel / Rubber Steel / Rubber Steel / Rubber Steel / Rubber
Engine Model Kubota D1503-M Kubota D1503-M Kubota V2203-M Kubota V2403-M
Output (SAE 1349 gross) HP(kW)/rpm 28.0 (20.9) / 2300 28.0 (20.9) / 2300 42.0 (30.7) / 2250 47.0 (34.6) / 2200
Displacement cu.in. (cc) 91.5" (1499) 91.5" (1499) 134.1" (2197) 148.5" (2434)
Dimensions Overall length ft.in. (mm) 15'7" (4760) 15'5" (4695) 16'9" (5090) 18'8" (5540)
Overall height
canopy ft.in. (mm) 8'0" (2440) 8'0" (2440) 8'3" (2495) 8'4" (2540)
cab ft.in. (mm) 8'0" (2440) 8'0" (2440) 8'2" (2480) 8'4" (2540)
Overall width ft.in. (mm) 5'1" (1550) 5'7" (1700) 5'7" (1700) 6'5" (1960)
Min. ground clearance in. (mm) 11.6" (295) 11.4" (290) 13.0" (330) 12.6" (320)
Hydraulic system Pump capacity GPM (l/min) 10.9 (41.4) variable u2
5.5 (20.9) Gear u1
10.3 (39.1) u2
5.5 (20.7) u1 25.0 (94.5) 31.4 (118.8)
Auxiliary hydraulic flow GPM (l/min) 10.9 (41.4) 10.3 (39.1) 15.9 (60.0) 19.3 (73)
Max. breakout
force
Bucket lbs.(kgf) 8059 (3655) 8397 (3809) 8754 (3970) 11118 (5043)
Arm lbs.(kgf) 3592 (1629) 4222 (1915) 3947 (1790) 4967 (2253)
Drive system
Travel Speed
Low mph (km/h) 1.9 (3.1) 1.9 (3.0) 1.7 (2.7) 1.6 (2.5)
High mph (km/h) 2.9 (4.8) 2.9 (4.6) 3.1 (5.0) 2.9 (4.6)
Max. traction force lbs.(kgf) 5600 (2540) 6098 (2766) 9697 (4398) 12861 (5833)
Tumbler distance ft.in. (mm) 5'1" (1560) 5'6" (1665) 5'8" (1710) 6'6" (1990)
Crawler length ft.in. (mm) 6'7" (2000) 6'11" (2100) 7'2" (2175) 8'2" (2500)
Shoe width in. (mm) 11.8" (300) 11.8" (300) 13.8" (350) 15.7" (400)
Ground contact
pressure
Canopy Cab Rubber/
Steel psi (kgf/cm2) 4.64 (0.33) / 4.70 (0.33) 4.7 (0.33) / 4.8 (0.34) 4.41 (0.31) / 4.55 (0.32) 4.27 (0.30) / 4.41 (0.31)
Rubber/Steel psi (kgf/cm2) 4.70 (0.33) / 4.56 (0.32) 4.8 (0.34) / 5.0 (0.35) 4.41 (0.31) / 4.41 (0.31) 3.27 (0.23) / 3.41 (0.24)
Swing system Unit swing speed rpm 9.4 8.9 9.4 9.3
Boom swing
angle
Left degree 80 70 80 80
Right degree 50 50 50 50
Blade
Dimensions
Width ft.in. (mm) 5'1" (1550) 5'7" (1700) 5'7" (1700) 6'5" (1960)
Height in. (mm) 13.2" (335) 13.2" (335) 13.8" (350) 15.4" (390)
Max.lift above ground in. (mm) 14.6" (370) 14.6" (370) 15.7" (400) 17.9" (455)
Max.drop below ground in. (mm) 14.6" (370) 14.6" (370) 15.9" (405) 14.8" (375)
Hydraulic oil (reservoir/system) gal (l) 9.5 (36) / 14.5 (55) 9.5 (36) / 14.5 (55) 11.6 (44) / 17.7 (67) 11.6 (44) / 17.7 (67)
Fuel reservoir gal (l) 13.2 (50) 10.6 (40) 16.9 (64) 18.5 (70)
Operating weight Including Canopy Rubber/Steel lbs.(kgf) 7110 (3225) / 7319 (3320) 8025 (3640) / 8234 (3735) 9063 (4110) / 9283 (4210) 11532 (5230) / 12348 (5600)
operator's weight 175lbs. Cab Rubber/Steel lbs.(kgf) 7330 (3325) / 7540 (3420) 8267 (3750) / 8477 (3845) 9261 (4200) / 9371 (4250) 11698 (5305) / 12513 (5675)

I - 8
WSM Minor Change I Sales Engineering Section
2.DIMENSIONS
3.WORKING RANGE
The company reserves the right to change the above specifications without notice. This brochure is for descriptive purpose only.
Please contact your local Kubota dealer for warranty infomation. For your safety, KUBOTA strongly recommends the use of a Rollover Pro-
tective structure (ROPS) and seat belt almost all applications.
4.LIFTING CAPACITY
Machine with ROPS canopy and rubber crawler, without bucket
Model KX91-3S U35S KX121-3S KX161-3S
A Max. digging height ft.in. (mm) 16'3" (4940) 16'3" (4945) 17'10" (5420) 18'9" (5715)
B Max. dumping height ft.in. (mm) 11'7" (3530) 11'7" (3525) 12'9" (3890) 13'8" (4155)
C Max. digging depth ft.in. (mm) 10'5" (3185) 10'4" (3140) 11'6" (3505) 12'7" (3830)
D Max. vertical digging depth ft.in. (mm) 7'10" (2390) 7'4" (2230) 8'2" (2480) 8'6" (2585)
E Max. digging radius @ ground ft.in. (mm) 16'10" (5135) 16'11" (5145) 18'0" (5475) 20'1" (6130)
F Max. digging radius ft.in. (mm) 17'3" (5245) 17'3" (5260) 18'5" (5600) 20'6" (6260)
G Min. turning radius W/O ft.in. (mm) 6'2" (1870) 6'7" (2015) 6'9" (2060) 7'11" (2420)
W swing ft.in. (mm) 4'9" (1440) 5'3" (1603) 5'6" (1665) 6'5" (1955)
H Min. tail turning radius ft.in. (mm) 4'4" (1310) 33.5" (850) 4'3" (1300) 3'7" (1090)
U35S KX91-3S KX121-3S KX161-3S
LIFT
POINT
HEIGHT
(ft)
LIFTING CAPACITY
OVER-FRONT
BLADE DOWN
LIFTING CAPACITY
OVER-SIDE
LIFTING CAPAC-
ITY OVER-FRONT
BLADE DOWN
LIFTING CAPACITY
OVER-SIDE
LIFTING CAPACITY
OVER-FRONT
BLADE DOWN
LIFTING CAPACITY
OVER-SIDE
LIFTING CAPACITY
OVER-FRONT
BLADE DOWN
LIFTING CAPACITY
OVER-SIDE
unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba
LIFT POINT RADIUS
(ft)
LIFT POINT
RADIUS (ft)
LIFT POINT
RADIUS (ft)
LIFT POINT RADIUS
(ft)
LIFT POINT
RADIUS (ft)
LIFT POINT RADIUS
(ft)
LIFT POINT
RADIUS (ft)
LIFT POINT
RADIUS (ft)
8 12 MAX 8 12 MAX 8 12 MAX 8 12 MAX 8 12 MAX 8 12 MAX 8 12 MAX 8 12 MAX
GL 6 2.13 1.61 - 2.13 1.42 - 1.78 1.42 1.36 1.78 1.30 1.03 3.09 2.19 2.01 3.09 1.83 1.46 4.29 2.6 2.12 4.29 2.59 1.66
4 2.79 1.76 1.58 2.52 1.39 1.10 2.42 1.58 1.43 2.29 1.27 1.01 4.03 2.44 2.15 3.15 1.78 1.43 - 3 2.25 - 2.49 1.63
2 3.28 1.91 1.63 2.42 1.35 1.08 2.95 1.74 1.50 2.18 1.23 0.99 4.66 2.67 2.27 3.02 1.73 1.41 3.9 3.33 2.36 3.9 2.4 1.59
0 3.46 1.99 - 2.37 1.33 - 3.22 1.84 1.53 2.11 1.20 0.97 4.89 2.81 2.34 2.96 1.70 1.38 4.73 3.33 2.43 4.3 2.34 1.57

II - 1
WSM Minor Change II Service Engineering Section
II Service Engineering Section
A. General outline...................................................................II-2
a. New engineering points........................................................................ II-2
b. Photos of main modified parts.............................................................. II-3
c. Major specifications incorporated......................................................... II-4
d. Quantity water and oil........................................................................... II-5
e. Quality specifications............................................................................ II-6
B. Finger control service port system...................................II-22
a. Feature and purpose.......................................................................... II-22
b. Outline of control system.................................................................... II-23
c. Hydraulic circuit diagram.................................................................... II-25
d. Knob structure and function ............................................................... II-26
e. Initial settings of the knob................................................................... II-32
f. S/P valve start point setting................................................................ II-34
g. Manual feeling setting ........................................................................ II-40
h. Panel display operation flow chart...................................................... II-42
i. Proportional control solenoid valve (S/P valve).................................. II-51
j. Other controls..................................................................................... II-55
k. Troubleshooting.................................................................................. II-56
C. Hydraulic system modification .........................................II-57
a. Outline................................................................................................ II-57
b. Hydraulic pump: KX161-3s, KX161-3D ............................................. II-58
c. Control valve ...................................................................................... II-63
d. Accumulator ....................................................................................... II-68
e. Hydraulic system line ......................................................................... II-73
f. Service port (S/P) solenoid valve ....................................................... II-82
g. Travel motor: KX91-3S: PP-version ................................................... II-85
h. Travel motor minor change: KX121-3SD, 161-3SD, U45-3SD......... II-89
D. Hydraulic circuit diagram..................................................II-91
E. Engine upgrade..............................................................II-109
a. General............................................................................................. II-109
b. Engine specifications........................................................................ II-109
c. Engine performance curve ............................................................... II-111
F. Electrical system............................................................II-114

II - 2
WSM Minor Change II Service Engineering Section
A. General outline
a. New engineering points
No New contents
PP-version (KTC, KCL, KTA) EU-version
KX91-3S,
U35S, U35-3S
KX121-3S,
KX161-3S,
U45-3S
KX91-3D,
KX101-3D
U35-3DKX121-3D,
KX161-3D
U45-3D
8 Digital panel ٤ ٤ ٤٤٤٤
4 Arm with thumb
bracket, option ٤ ٤ ٤٤٤٤
Finger control ser-
vice port ٤ ٤ ٤٤٤٤
3 Breaker switch ٤ ٤ ٤٤٤٤
7 Two speed switch ٤ ٤ ٤٤٤٤
6 Fuel-water separa-
tor ٤ ٤ ٤٤٤٤
9 Anti-theft system - - ٤٤٤٤
5 Accumulator in pilot
control line ٤ ٤ ٤٤٤٤
2 Proportional control
solenoid valve ٤ ٤ ٤٤٤٤
10 Upgraded engine
V2403-M -
KX161-3S PP-
version only
٤
----

II - 3
WSM Minor Change II Service Engineering Section
b. Photos of main modified parts
No.1 Knob switch
No.6 Fuel-water separator No.7 Two speed switch No.9 Anti-theft system
(EU-version)
No.8 Digital meter panel, AI-version
No.5 Accumulator in pilot line
No.8 Digital meter panel
No.2 S/P solenoid valve No.4 Arm with thumb bracket

II - 4
WSM Minor Change II Service Engineering Section
c. Major specifications incorporated
- KX91-3S, KX91-3D, KX101-3D, U35S, U35-3S, U35-3D-
- KX121-3S, KX121-3D, KX161-3S, KX161-3D, U45-3S, U45-3D-
Specs. KX91-3S KX91-3DKX101-3DU35S U35-3S U35-3D
KTC, KCL KTA EU EU KTC, KCL KTA EU
STD arm 1550mm 1275mm 1350mm 1350mm 1350mm 1350mm
Rubber track 300mm mm300mm mm
Iron track 300mm mm300mm mm
Cab (Rops / Fops) {mm{{m
Canopy (Rops / Fops) {mm{{m
Telescopic arm
(1246 - 2046) {²{{²²²
Bucket Local content mm Local content m
Travel alarm ²{²²²{²
Canopy light ²{²²²{²
Arm rest Wrist rest {Wrist rest mm{Wrist rest
TPSS {²² {²
Engines type D1503-M mmmmmm
Third line valve ²²{{²²{
Specs. KX121-3S KX121-3DKX161-3S KX161-3DU45-3S U45-3D
KTC, KCL KTA EU KTC, KCL KTA EU KTA EU
STD arm 1600mm m1300mm 1780mm m1480mm 1360mm m
Rubber track 350mm mm400mm mm400mm m
Iron track 350mm mm
400mm /
550mm mm
400mm /
550mm m
Cab (Rops / Fops) {m{{ mmm
Canopy (Rops / Fops) {m{{ mmm
Telescopic arm
(1246 - 2046) ²²² ²² ² ² ²
Bucket Local content mLocal content mmm
Travel alarm ²{²²{²{²
Canopy light ²{²²{²{²
Arm rest Wrist rest {Wrist rest m{Wrist rest {Wrist rest
TPSS {²{²{²
Engine
type
STD V2203-M-E2BH-2-N V2403-M-E2BH-1 V2203-M-E2BH-2-N
Air con. V2203-M-E2BH-3-N V2403-M-E2BH-2 V2203-M-E2BH-3-N
Third line valve {{

II - 5
WSM Minor Change II Service Engineering Section
d. Quantity water and oil
NOTE: In the super series, coolant amount has been increased due to the warming line of the service
port value.
Unit KX91-3S
KX91-3DKX101-3DU35S, U35-3S
U35-3DRemarks
Radiator L
gal
7.3
1.93 mm
L.L.C
Reserve tank L
gal
1.6
0.42 mm
Engine Crank case L
gal
5.3
1.40 mm
SAE10W30(CD)
Hydraulic oil Full L
gal
55.0
14.53 mm
ISO 46
Hydraulic oil Tank L
gal
36.0
9.51 mm
ISO 46
Wheel motor L
gal
0.5
0.13 mm
SAE90 (API GL-4)
Track roller cc
gal
70
0.018 mm
SAE30(CD)
Upper roller cc
gal
60
0.016 mm
SAE30(CD)
Front idler cc
gal
80
0.02 mm
SAE30(CD)
Fuel tank L
gal
46.5
12.30 m40.6 10.6
Unit KX121-3S
KX121-3D
U45-3S
U45-3D
KX161-3S
KX161-3DRemarks
Radiator L
gal
7.4 (7.7)
1.96 (2.04) mm
L.L.C
Reserve tank L
gal
1.1
0.29 m0.5
0.13
Engine Crank case L
gal
8.5
2.25 mm
SAE10W30(CD)
Hydraulic oil Full L
gal
75
19.8 mm
ISO 46
Hydraulic oil Tank L
gal
46
12.2 mm
ISO 46
Wheel motor L
gal
0.5
0.13 m0.9
0.24 SAE90 (API GL-4)
Track roller cc
gal
80
0.021 mm
SAE30(CD)
Upper roller cc
gal
60
0.016 mm
SAE30(CD)
Front idler cc
gal
80
0.021 m50
0.013 SAE30(CD)
Fuel tank L
gal
64
16.9 mm

II - 6
WSM Minor Change II Service Engineering Section
e. Quality specifications
Note: 1. Only those data with bold letter and with shadow are different from those of the previous models before modification.
2. EU-version will be announced later.
U35S ( KTC, KCL ), U35-3S ( KTA ), KX91-3S(KTC,KCL,KTA)
Machine specification : Service port, Wrist rest, STD-arm, KBT-cab, KBT-bucket.
No Specificatios Items Unit U35S (KTC, KCL)
U35-3S (KTA)
KX91-3S
(KTC, KCL, KTA) Remarks
Q1 Main Speed JIS A8404
1 1 Machine size Total length (Transport) mm 4695 r94 4760 r95
inch 184.8 r3.7 187.4 r3.7
2Total width mm 1700 r17 1550 r16
inch 66.9 r0.7 61.0 r0.6
3Total height (Canopy) mm 2440 r24
inch 96.1 r0.9
4Total height (Cabin) mm 2440 r24
inch 96.1 r0.9
2 1 Weight Machine weight (Canopy) kg 3560 r71 3225 r65 Fuel tank
lbs 7848.4 r156.5 7109.8 r143.3
2Machine weight (Cabin) kg 3660 r73 3225 r67
lbs 8068.8 r160.9 7109.8 r147.7
3 1 Performance Swivel speed Lrpm9r0.9 9.4 r0.9
2Rrpm9r0.9 9.4 r0.9
3
Travel speed
Lubber F1 km/h 3.0 r0.3 3.1 r0.3
mph 1.86 r0.19 1.93 r0.19
4Lubber F2 km/h 4.6 r0.5 4.8 r0.5
mph 2.86 r0.31 2.98 r0.31
5Iron F1 km/h 2.9 r0.3 3.0 r0.3
mph 1.80 r0.19 1.86 r0.19
6Iron F2 km/h 4.6 r0.5 4.8 r0.5
mph 2.86 r0.31 2.98 r0.31
7 Gradeability deg 30 30
4 1 Rear end min. turning radius mm 850 r17 1310 r26
inch 33.5 r0.7 51.6 r1.0
2 Swivel frame rear ground clearance mm 525 r11 530 r11
inch 20.7 r0.4 20.9 r0.4
3 Tambler center distance mm 1670 r50 1560 r47
inch 65.7 r2.0 61.4 r1.9
4 Crawler total length mm 2100 r63 2000 r60
inch 82.7 r2.5 78.7 r2.4
5 Crawler total width mm 1700 r34 1550 r31
inch 66.9 r1.3 61.0 r1.2
6 Min. ground clearance mm 285 r9290r9
inch 11.2 r0.4 11.4 r0.4
5 1 Front attach-
ment Bucket heaped capacity CECE m3 0.077
yd3 0.01
2 SAE, JIS m3 0.1 0.1
yd3 0.13 0.13
3 Bucket width mm 555 r12 555 r11 Without side cut-
ter
inch 21.9 r0.5 21.9 r0.4
4 Swing angle Canopy L deg 70 r280r2
5 Canopy R deg 50 r248r2
6 Cabin L deg r80 r2
7 Cabin R deg r48 r2

II - 7
WSM Minor Change II Service Engineering Section
5 8 Front attach-
ment Max. digging radius mm 5255 r79 5245 r79
inch 206.9 r3.1 206.5 r3.1
9 Ground level Max. digging
radius mm 5140 r77 5135 r77
inch 202.4 r3.0 202.2 r3.0
10 Ground level Min. finish
radius mm 1755 r35 1410 r28 Bucket bottom
horizontal
inch 69.1 r1.4 55.5 r1.1
11 Max. digging depth mm 3115 r62 3185 r64
inch 122.6 r2.4 125.4 r2.5
12 Max. vertical digging depth mm 2185 r44 2390 r48
inch 86.0 r1.7 94.1 r1.9
13 Max. digging
height Conopy mm 4890 r98 4875 r98
inch 192.5 r3.9 191.9 r3.9
14 Cabin mm 4660 r93
inch 183.5 r3.7
15 Max. dump
height Conopy mm 3470 r69
inch 136.6 r2.7
16 Cabin mm 3265 r65
inch 128.5 r2.6
17 Max. dump
height (Arm
vertical)
Conopy mm 1230 r37 965 r29
inch 48.4 r1.5 38.0 r1.1
18 Cabin mm 1125 r34
inch 44.3 r1.3
19 Mini. turning
radius
Conopy mm 2065 r62 1940 r116
inch 81.3 r2.4 76.4 r4.6
20 Cabin mm 2190 r66
inch 86.2 r2.6
21 Mini. turning
radius (Left
swing)
Conopy mm -
inch -
22 Cabin mm -
inch -
6 1 Dozer Width mm 1700 r5 1550 r5
inch 66.9 r0.2 61.0 r0.2
2 Height mm 335 r25 355 r10
inch 13.2 r1.0 14.0 r0.4
3 Max. lift above GL mm 370 r26 375 r26
inch 14.6 r1.0 14.8 r1.0
4 Max. below GL mm 370 r26 365 r26
inch 14.6 r1.0 14.4 r1.0
Q2 Main Specs JIS A8404
1 1 Bucket tooth slaggish mm 70 >
inch 2.76 >
2 Tilt amount of front attachment mm 10 >
inch 0.39 >
3 Dozer's declination mm 10 >
inch 0.39 >
2 1 Eccentric amount from swing center mm From swivel cen-
ter
inch
2 Distance to swing center mm 72 r25.0 135 r25.0
inch 2.83 r1.0 5.31 r1.0
3 1 Approach angle deg 31.4 r3.5 30 r3
No Specificatios Items Unit U35S (KTC, KCL)
U35-3S (KTA)
KX91-3S
(KTC, KCL, KTA) Remarks

II - 8
WSM Minor Change II Service Engineering Section
4 1 Crawler height mm 420 r8 430 r9 Include grouser
on the spocket
inch 16.54 r0.31 16.93 r0.35
2 Max. crawler height mm 450 r9455r14
inch 17.72 r0.35 17.91 r0.55
Q3 Engine performance
1 1 "Max, engine
rpm"
no load rpm 2550 >
2 1 pump relief rpm - -
3 2 pump relief rpm - -
4 3 pump relief rpm - - Boom, arm,
swivel
5 2 pump relief rpm 2300 <
6 Dozer+2 pump relief rpm 2100 <
2 1 Idler rpm 1050 r50
Q4 Travelling performance
1 1 Travel motor
block perfor-
mance
L mm 300 > 20 deg, 10 min
inch 11.81 >
2 Travel motor
block perfor-
mance
Rubber mm 300 >
inch 11.81 >
2 1 Max, Traction
force
F1 kgf 2766 2655 On the center
kN 27.1 26.0
lbs 6098 5853
2 F2 kgf 1546 1485
kN 15.2 14.6
lbs 3408 3274
3 1 Travel straight-
ness
F1 mm 600 > 10m distance
inch 23.62 >
2F2 mm600>
inch 23.62 >
3 Dozer F1 mm 600 > Dozer up &
down 10m dis-
tance
inch 23.62 >
4 Dozer R1 mm 600 >
inch 23.62 >
4 1 Track shoe sag
distance
Iron mm 75 to 80
inch 2.95 to 3.15
2 Rubber mm 10 to 15
inch 0.39 to 0.59
Q5 Work performance
1 1 Boom lifting capacity kgf 575 434 Front end, Arm
extend bucket
crowd, at tooth
kN 5.6 4.3
lbw 1268 957
2 Arm digging force kgf 1888 1629 Bucket tooth
root
kN 18.5 16.0
lbw 4162 3591
3 Bucket digging force kgf 2882 /3810 3655 Machine stance
to JIS bucket
tooth root
kN 28.3 / 37.4 35.8
lbw 6354 / 8400 8058
4 Dozer force down kgf 2652 2841 Cutting edge
down force at
ground level
kN 26.0 27.9
lbw 5847 6263
No Specificatios Items Unit U35S (KTC, KCL)
U35-3S (KTA)
KX91-3S
(KTC, KCL, KTA) Remarks

II - 9
WSM Minor Change II Service Engineering Section
2 1 Boom speed Canopy up 1st sec 2.4 r0.3 2.1 r0.3 Oil temp.
50r5qC
(122r41qF)
Ground to max.
height (excu-
lude cushioning)
2 up 2nd sec -
3 down sec 3.0 r0.3 2.9 r0.3
4 down sec -
5 Cabine up (GoT) sec -
6 up (LoT) sec -
7 down (ToG) sec -
8 down (ToL) sec -
3 1 Arm speed crowd sec 3.1 r0.3
2 extend sec 2.7 r0.3 3 r0.3
4 1 Bucket speed crowd sec 2.6 r0.3 2.7 r0.3 Oil temp.
50r5qC
(122r41qF)
2 dump sec 1.7 r0.3 1.9 r0.3
5 1 Dozer speed up (GoT) sec - Max. down to
max. up
2 up (LoT) sec 2.2 r0.3 2.1 r0.3 Max. up to max.
down
3 down (ToG) sec -
4 down (ToL) sec 2.9 r0.3 2.8 r0.3
6 1 Arm cylinder cavitation mm 5 > Oil temp.
95r5qC
(203r41qF)
inch 0.20 >
7 1 Max. digging
height radius
Canopy mm 2800 2920 r292
inch 110.24 114.96 r11.50
2 Cabine mm 3215 r322
inch 126.57 r12.68
3 Max. dump
height radius
Canopy mm 2621 r157 2790 r167 at bucket pin
inch 103.19 r6.18 109.84 r6.57
4Cabine mm
2961 r178
inch 116.57 r7.01
5 Bucket bottom
height at arm
vertical
Canopy mm 1525 r46 1265 r48 Bucket horizon-
tal
inch 60.04 r1.81 49.80 r1.89
6 Cabine mm 1415 r42
inch 55.71 r1.65
7 Bucket wrist angle degree - 190 r3
Q6 Swivel, swing performance
1 1 Swivel torque L kgfm 738 627 Arm
extend,show/
Quick
kN.m 7.2 6.1
ftlbs 5338 4535
2R
kgfm738 627
kN.m 7.2 6.1
ftlbs 5338 4535
2 1 Swivel angle L deg 15 < 20 , 19< Bucket load=JIS
heapedu1.8
2 R deg 15 < 20 , 19<
3 1 Swivel block performance L deg 5 > 6 >
2Rdeg5>6>
3Ldeg30>
4Rdeg30>
4 1 Swivel start-up speed L sec 2.5 r0.3 3 r0.3 0~90 deg swivel
2Rsec2.5r0.3 3 r0.3
No Specificatios Items Unit U35S (KTC, KCL)
U35-3S (KTA)
KX91-3S
(KTC, KCL, KTA) Remarks