Kubota KX91-3a, U35-3a, KX121-3a, KX101-3a, KX161-3a Workshop Manual

WORKSHOP MANUAL

KUBOTA EXCAVATOR

KX91-3S

KX121-3S

U35S,U35-3S

·D

·D

·D

, 101-3

D

,161-3S

, U45-3S

Minor change Chapter

·D

·D

Code No.97899-61260

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

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.

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.

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 - 1

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)

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.

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)

I - 2

WSM Minor Change I Sales Engineering Section

b. KX121-3S, KX121-3D, KX161-3S, KX161-3D, U45-3S, U45-3D

New immobilizer system introduced

Thumb bracket adopted

(North America)

Travel bi-speed switch

(Dozer lever)

Independent swing pedal

on the right side

(Europe)

Service port knob control

Digital navigation system adopted

Greater engine output (KX161-3S)

Sedimenter separately located

Larger fuel tank capacity

(KX91-3S, KX161-3S)

North America, Australia, Europe

I - 3

WSM Minor Change I Sales Engineering Section

B. Feature discriptions

(Super series)

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 extraordi­nary responsiveness, even with the slightest oper­ator 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.

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 com­pact during transport and secure when parked on an incline. And
an OSHA certified ROPS/FOPS canopy and cab protects
against rollovers or falling objects.

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 - 4

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 suspension­engineered 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 mainte­nance 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 sep­arator, the radiator, coolant, air filter, con­trol 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 supe­rior 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 - 5

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 Intelli­gent 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.

Language selection display Information when service time comes Low fuel display

USER-FRIENDLY OPERABILITY

SHORT STROKE
OPERATING LEVER

The new operating levers require less
effort and shorter movement, increas­ing control, responsiveness and com­fort. With only the slightest flick of the
wrist, smooth excavator operation and
reduced operator fatigue are assured.

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 sig­nificantly reduced with
the factory installed

2 SPEED SWITCH

The new 2-Speed Travel Switch is
conveniently mounted on the dozer
lever for easier operation and con­trol. 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.

BREAKER SWITCH

The breaker switch lets you man­age the hydraulic breaker attach­ment quickly, easily and without
having to reach for the control.
Repositioned from the floor, sim­ple forefinger activation as well as
convenient thumb operation of the
hydraulic breaker is possible.

I - 6

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

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 u 2

Auxiliary hydraulic flow GPM (l/min) 10.9 (41.4) 10.3 (39.1) 15.9 (60.0) 19.3 (73)

Max. breakout
force

Drive system

Swing system Unit swing speed rpm 9.4 8.9 9.4 9.3

Travel Speed

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

Boom swing
angle

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)

5.5 (20.9) Gear u 1

Bucket lbs.(kgf) 8059 (3655) 8397 (3809) 8754 (3970) 11118 (5043)

Arm lbs.(kgf) 3592 (1629) 4222 (1915) 3947 (1790) 4967 (2253)

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)

Canopy Cab Rubber/
Steel

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)

Left degree 80 70 80 80

Right degree 50 50 50 50

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)

10.3 (39.1) u 2

5.5 (20.7) u 1

25.0 (94.5) 31.4 (118.8)

Blade

Dimensions

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)

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)

I - 7

WSM Minor Change I Sales Engineering Section

2.DIMENSIONS

3.WORKING RANGE

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

H Min. tail turning radius ft.in. (mm) 4'4" (1310) 33.5" (850) 4'3" (1300) 3'7" (1090)

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)

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 Pro­tective structure (ROPS) and seat belt almost all applications.

4.LIFTING CAPACITY

U35S KX91-3S KX121-3S KX161-3S

LIFTING CAPACITY

OVER-FRONT

LIFT

POINT

HEIGHT

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

BLADE DOWN

unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba unit=1000lba

LIFT POINT RADIUS

(ft)

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

(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

LIFTING CAPACITY

OVER-SIDE

LIFT POINT
RADIUS (ft)

LIFTING CAPAC-

ITY OVER-FRONT

BLADE DOWN

LIFT POINT
RADIUS (ft)

LIFTING CAPACITY

OVER-SIDE

LIFT POINT RADIUS

(ft)

LIFTING CAPACITY

OVER-FRONT

BLADE DOWN

LIFT POINT
RADIUS (ft)

LIFTING CAPACITY

OVER-SIDE

LIFT POINT RADIUS

(ft)

LIFTING CAPACITY

OVER-FRONT
BLADE DOWN

LIFT POINT
RADIUS (ft)

LIFTING CAPACITY

OVER-SIDE

LIFT POINT
RADIUS (ft)

Machine with ROPS canopy and rubber crawler, without bucket

I - 8

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 - 1

WSM Minor Change II Service Engineering Section

A. General outline

a. New engineering points

PP-version (KTC, KCL, KTA) EU-version

No New contents

8 Digital panel
4 Arm with thumb

bracket, option
Finger control ser-



vice port
3 Breaker switch
7 Two speed switch
6 Fuel-water separa-

tor
9 Anti-theft system - ­5 Accumulator in pilot

control line
2 Proportional control

solenoid valve

10 Upgraded engine

V2403-M -

KX91-3S,
U35S, U35-3S

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

٤ ٤ ٤٤٤٤

KX121-3S,
KX161-3S,
U45-3S

KX161-3S PP-

version only

٤

KX91-3D,
KX101-3D

٤٤٤٤

----

U35-3D KX121-3D,

KX161-3D

U45-3D

II - 2

WSM Minor Change II Service Engineering Section

b. Photos of main modified parts

No.1 Knob switch

No.2 S/P solenoid valve

No.8 Digital meter panel

No.4 Arm with thumb bracket

No.8 Digital meter panel, AI-version

No.5 Accumulator in pilot line

No.6 Fuel-water separator

No.7 Two speed switch

II - 3

No.9 Anti-theft system

(EU-version)

WSM Minor Change II Service Engineering Section

c. Major specifications incorporated

- KX91-3S, KX91-3D, KX101-3D, U35S, U35-3S, U35-3D -

Specs.

STD arm 1550mm 1275mm 1350mm 1350mm 1350mm 1350mm
Rubber track 300mm mm300mm mm
Iron track 300mm mm300mm mm

Cab (Rops / Fops)

Canopy (Rops / Fops)

Telescopic arm
(1246 - 2046)

Bucket Local content mm Local content m

Travel alarm

Canopy light

Arm rest Wrist rest

TPSS

Engines type D1503-M mmmmmm

Third line valve

KTC, KCL KTA EU EU KTC, KCL KTA EU

KX91-3S

{
{

{ ² {{²²²

² { ²²²{ ²
² { ²²²{ ²

{

{ ²² { ²

²²{{²²{

D KX101-3D

KX91-3

mm

mm

Wrist rest mm

U35S U35-3S

U35-3

{{
{{

{

D

m

m

Wrist rest

- KX121-3S, KX121-3D, KX161-3S, KX161-3D, U45-3S, U45-3D -

Specs.

STD arm 1600mm m 1300mm 1780mm m 1480mm 1360mm m
Rubber track 350mm mm400mm mm400mm m

Iron track 350mm mm

Cab (Rops / Fops)

Canopy (Rops / Fops)

Telescopic arm
(1246 - 2046)

Bucket Local content m Local content mmm
Travel alarm

Canopy light

Arm rest

TPSS

Engine
type

Third line valve

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

KX121-3S

KTC, KCL KTA EU KTC, KCL KTA EU KTA EU

{
{

²²² ²² ² ² ²

² { ²²{ ² { ²
² { ²²{ ² { ²

Wrist rest

{

{ ² { ² { ²

{{

KX121-3

Wrist rest m

D

m

m

KX161-3S

400mm /

550mm

mm

{{
{{

{

KX161-3D

mmm

mmm

Wrist rest

U45-3S

400mm /

550mm

{

U45-3D

m

Wrist rest

II - 4

WSM Minor Change II Service Engineering Section

d. Quantity water and oil

Radiator

Reserve tank

Engine Crank case

Hydraulic oil Full

Hydraulic oil Tank

Wheel motor

Track roller

Upper roller

Front idler

Fuel tank

Unit

L

gal

L

gal

L

gal

L

gal

L

gal

L

gal

cc

gal

cc

gal

cc

gal

L

gal

KX91-3S
KX91-3

7.3

1.93

1.6

0.42

5.3

1.40

55.0

14.53

36.0

9.51

0.5

0.13
70

0.018
60

0.016
80

0.02

46.5

12.30

D

KX101-3D

U35S, U35-3S

U35-3D

Remarks

mm

L.L.C

mm

mm

mm

mm

mm

mm

mm

mm

m

40.6

10.6

SAE10W30(CD)

ISO 46

ISO 46

SAE90 (API GL-4)

SAE30(CD)

SAE30(CD)

SAE30(CD)

Radiator

Reserve tank

Engine Crank case

Hydraulic oil Full

Hydraulic oil Tank

Wheel motor

Track roller

Upper roller

Front idler

Fuel tank

Unit

L

gal

L

gal

L

gal

L

gal

L

gal

L

gal

cc

gal

cc

gal

cc

gal

L

gal

KX121-3S
KX121-3

7.4 (7.7)

1.96 (2.04)

1.1

0.29

8.5

2.25
75

19.8
46

12.2

0.5

0.13
80

0.021
60

0.016
80

0.021
64

16.9

U45-3S

D

U45-3

D

KX161-3S

KX161-3

D

Remarks

mm

m

0.5

0.13

mm

mm

mm

m

0.9

0.24

mm

mm

m

50

0.013

L.L.C

SAE10W30(CD)

ISO 46

ISO 46

SAE90 (API GL-4)

SAE30(CD)

SAE30(CD)

SAE30(CD)

mm

NOTE: In the super series, coolant amount has been increased due to the warming line of the service

port value.

II - 5

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

Q1 Main Speed JIS A8404

1 1 Machine size

2

3

4

2 1 Weight

2

3 1 Performance

2Rrpm9r 0.9 9.4 r 0.9
3

4

5

6

7 Gradeability deg 30 30

4 1 Rear end min. turning radius mm 850 r 17 1310 r 26

2 Swivel frame rear ground clearance mm 525 r 11 530 r 11

3 Tambler center distance mm 1670 r 50 1560 r 47

4 Crawler total length mm 2100 r 63 2000 r 60

5 Crawler total width mm 1700 r 34 1550 r 31

6 Min. ground clearance mm 285 r 9290r 9

5 1 Front attach-

ment

2 SAE, JIS m3 0.1 0.1

3 Bucket width mm 555 r 12 555 r 11 Without side cut-

4 Swing angle Canopy L deg 70 r 280r 2
5 Canopy R deg 50 r 248r 2
6 Cabin L deg r 80 r 2
7 Cabin R deg r 48 r 2

Total length (Transport)

Total w i dth

Total height (Canopy)

Total height (Cabin)

Machine weight (Canopy)

Machine weight (Cabin)

Swivel speed

Travel speed

Bucket heaped
capacity

Lrpm9r 0.9 9.4 r 0.9

Lubber F1

Lubber F2

Iron F1

Iron F2

CECE m3  0.077

mm 4695 r 94 4760 r 95

inch 184.8 r 3.7 187.4 r 3.7

mm 1700 r 17 1550 r 16

inch 66.9 r 0.7 61.0 r 0.6

mm 2440 r 24

inch 96.1 r 0.9

mm 2440 r 24

inch 96.1 r 0.9

kg 3560 r 71 3225 r 65 Fuel tank

lbs 7848.4 r 156.5 7109.8 r 143.3

kg 3660 r 73 3225 r 67

lbs 8068.8 r 160.9 7109.8 r 147.7

km/h 3.0 r 0.3 3.1 r 0.3

mph 1.86 r 0.19 1.93 r 0.19

km/h 4.6 r 0.5 4.8

mph 2.86 r 0.31 2.98 r 0.31

km/h 2.9 r 0.3 3.0 r 0.3

mph 1.80 r 0.19 1.86 r 0.19

km/h 4.6 r 0.5 4.8 r 0.5

mph 2.86 r 0.31 2.98 r 0.31

inch 33.5 r 0.7 51.6 r 1.0

inch 20.7 r 0.4 20.9 r 0.4

inch 65.7 r 2.0 61.4 r 1.9

inch 82.7 r 2.5 78.7 r 2.4

inch 66.9 r 1.3 61.0 r 1.2

inch 11.2 r 0.4 11.4 r 0.4

yd3 

yd3 0.13 0.13

inch 21.9 r 0.5 21.9 r 0.4

U35S (KTC, KCL)

U35-3S (KTA)

KX91-3S

(KTC, KCL, KTA)

r 0.5

0.01

ter

Remarks

II - 6

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

5 8 Front attach-

ment

9 Ground level Max. digging

10 Ground level Min. finish

11 Max. digging depth mm 3115 r 62 3185 r 64

12 Max. vertical digging depth mm 2185 r 44 2390 r 48

13 Max. digging

14 Cabin mm 4660 r 93

15 Max. dump

16 Cabin mm 3265 r 65

17 Max. dump

18 Cabin mm 1125 r 34

19 Mini. turning

20 Cabin mm 2190 r 66

21 Mini. turning

22 Cabin mm -

6 1 Dozer Width mm 1700 r 5 1550 r 5

2 Height mm 335 r 25 355 r 10

3 Max. lift above GL mm

4 Max. below GL mm

Q2 Main Specs JIS A8404

1 1 Bucket tooth slaggish mm 70 >

2 Tilt amount of front attachment mm 10 >

3 Dozer's declination mm 10 >

2 1 Eccentric amount from swing center mm From swivel cen-

2 Distance to swing center mm 72 r 25.0 135 r 25.0

3 1 Approach angle deg 31.4 r 3.5 30 r 3

Max. digging radius mm 5255 r 79 5245 r 79

inch

radius

radius

Conopy mm 4890 r 98 4875 r 98

height

Conopy mm 3470 r 69

height

Conopy mm 1230 r 37 965 r 29

height (Arm
vertical)

Conopy mm 2065 r 62 1940 r 116

radius

Conopy mm ­radius (Left
swing)

mm 5140 r 77 5135 r 77

inch 202.4 r 3.0 202.2 r 3.0

mm 1755 r 35 1410 r 28 Bucket bottom

inch 69.1 r 1.4 55.5 r 1.1

inch 122.6 r 2.4 125.4 r 2.5

inch 86.0 r 1.7 94.1 r 1.9

inch 192.5 r 3.9 191.9 r 3.9

inch 183.5 r 3.7

inch 136.6 r 2.7

inch 128.5 r 2.6

inch 48.4 r 1.5 38.0 r 1.1

inch 44.3 r 1.3

inch 81.3 r 2.4 76.4 r 4.6

inch 86.2 r 2.6

inch -

inch -

inch 66.9 r 0.2 61.0 r 0.2

inch 13.2 r 1.0 14.0 r 0.4

inch

inch

inch 2.76 >

inch 0.39 >

inch 0.39 >

inch

inch 2.83 r 1.0 5.31 r 1.0

U35S (KTC, KCL)

U35-3S (KTA)

206.9 r 3.1 206.5 r 3.1

370 r 26 375 r 26

14.6 r 1.0 14.8 r 1.0
370 r 26 365 r 26

14.6 r 1.0 14.4 r 1.0

KX91-3S

(KTC, KCL, KTA)

Remarks

horizontal

ter

II - 7

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

4 1 Crawler height mm 420 r 8 430 r 9 Include grouser

inch 16.54 r 0.31 16.93 r 0.35

2 Max. crawler height mm 450 r 9455r 14

inch 17.72 r 0.35 17.91 r 0.55

Q3 Engine performance

1 1 "Max, engine

rpm"

2 1 pump relief rpm - ­3 2 pump relief rpm - ­4 3 pump relief rpm - - Boom, arm,

5 2 pump relief rpm 2300 <
6 Dozer+2 pump relief rpm 2100 <

2 1 Idler rpm

Q4 Travelling performance

1 1 Travel motor

block perfor­mance

2 Travel motor

block perfor­mance

2 1 Max, Traction

force

2 F2 kgf 1546 1485

3 1 Travel straight-

ness

2F2 mm600>

3 Dozer F1 mm 600 > Dozer up &

4 Dozer R1 mm 600 >

4 1 Track shoe sag

distance

2 Rubber mm 10 to 15

Q5 Work performance

1 1 Boom lifting capacity kgf 575 434 Front end, Arm

2 Arm digging force kgf 1888 1629 Bucket tooth

3 Bucket digging force kgf

4 Dozer force down kgf

no load rpm 2550 >

L mm 300 > 20 deg, 10 min

inch 11.81 >

Rubber mm 300 >

inch 11.81 >

F1 kgf 2766 2655 On the center

kN 27.1 26.0
lbs 6098 5853

kN 15.2 14.6
lbs 3408 3274

F1 mm 600 > 10m distance

inch 23.62 >

inch 23.62 >

inch 23.62 >

inch 23.62 >

Iron mm 75 to 80

inch 2.95 to 3.15

inch 0.39 to 0.59

kN 5.6 4.3

lbw 1268 957

kN

lbw

kN

lbw

kN

lbw

U35S (KTC, KCL)

U35-3S (KTA)

1050 r 50

18.5 16.0
4162 3591
2882 / 3810 3655 Machine stance

28.3 / 37.4 35.8
6354 / 8400 8058
2652 2841 Cutting edge

26.0 27.9
5847 6263

KX91-3S

(KTC, KCL, KTA)

Remarks

on the spocket

swivel

down 10m dis­tance

extend bucket
crowd, at tooth

root

to JIS bucket
tooth root

down force at
ground level

II - 8

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

2 1 Boom speed Canopy up 1st sec 2.4 r 0.3 2.1 r 0.3 Oil temp.

2 up 2nd sec ­3 down sec 3.0 r 0.3 2.9 r 0.3
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 r 0.3

2 extend sec 2.7 r 0.3 3 r 0.3

4 1 Bucket speed crowd sec 2.6 r 0.3 2.7 r 0.3 Oil temp.

2 dump sec 1.7 r 0.3 1.9 r 0.3

5 1 Dozer speed up (GoT) sec - Max. down to

2 up (LoT) sec 2.2 r 0.3 2.1 r 0.3 Max. up to max.

3 down (ToG) sec -
4 down (ToL) sec 2.9 r 0.3 2.8 r 0.3

6 1 Arm cylinder cavitation mm 5 > Oil temp.

inch 0.20 >

7 1 Max. digging

height radius

2 Cabine mm 3215 r 322

3 Max. dump

height radius

4Cabine mm

5 Bucket bottom

height at arm
vertical

6 Cabine mm 1415 r 42

7 Bucket wrist angle degree - 190 r 3

Q6 Swivel, swing performance

1 1 Swivel torque L kgfm 738 627 Arm

2R

2 1 Swivel angle L deg 15 < 20 , 19< Bucket load=JIS

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 r 0.3 3 r 0.3 0~90 deg swivel

2Rsec2.5r 0.3 3 r 0.3

Canopy mm 2800 2920

inch 110.24 114.96 r 11.50

inch 126.57 r 12.68

Canopy mm

inch 103.19 r 6.18 109.84 r 6.57

inch

Canopy mm 1525 r 46 1265 r 48 Bucket horizon-

inch 60.04 r 1.81 49.80 r 1.89

inch 55.71 r 1.65

kN.m 7.2 6.1

lbs

ft

kgf

kN.m 7.2 6.1

ftlbs

U35S (KTC, KCL)

U35-3S (KTA)

2621 r 157 2790 r 167 at bucket pin

2961 r 178

116.57 r 7.01

5338 4535

m

5338 4535

738 627

KX91-3S

(KTC, KCL, KTA)

292

r

Remarks

50r5qC
(122r41qF )
Ground to max.
height (excu­lude cushioning)

50r5qC
(122r41qF)

max. up

down

95r5qC
(203r41qF)

tal

extend,show/
Quick

heapedu1.8

II - 9

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

5 1 Swing speed Canopy L sec 5.8 r 0.3 5.9 r 0.5

2Rsec4.6r 0.3 4.5 r 0.5
3 Cabine L sec
4Rsec

6 1 Swing Lock Swivel R&L mm 10 > 90 deg-swivel,

inch 0.39 >

2 Reciprocating

motion

Q7 Hydraulic performance

1 1 Relief pressure setting P1 kgf/cm2 255 r 5 245 At pump delivery

2 P2 kgf/cm2 255 r 5 245

3 P3 kgf/cm2 207 r 5 210

4 P4 kgf/cm2 40 +3, -0

2 1 Cylinder oil

sealing capacity

295r5qC

3Arm50r5qC

4 Bucket 50r5qC

5 Dozer 50r5qC

3 1 Boom cushioning performance 30qC(86qF) sec 3 >

250qC(122qF) sec 0.4 to 1.3
380qC(176qF) sec 0.3 <

Q8 Lever operating force & stroke

1 1 Boom lever operating force up kgf 1.7 r 1.0 1.7 r 0.5

2 down kgf 1.4 r 1.0 1.4 r 0.5

L / R Swing mm 90 deg-swivel,

inch

MPa 25.0 r 0.5 24.0

bar 24.5 r 24.5 24.5

psi 3627 r 71 3485

MPa 25.0 r 0.5 24.0

bar 24.5 r 24.5 24.5

psi 3627 r 71 3485

MPa 20.3 r 0.5 20.6

bar 24.5 r 24.5 24.5

psi 2944 r 71 2987

MPa 3.9 +0.3, -0

bar 3.9 +0.03, -

psi 569 +43, -0

Boom 50r5qC

(122r41qF)

(203r41qF)

(122r41qF)

(122r41qF)

(122r41qF)

mm 6 > 20 > Arm extend,

inch 0.24 > 0.79 >

mm 6 > 20 >

inch 0.24 > 0.79 >

mm

inch

mm 25 > Bucket load=JIS

inch 0.98 >

mm 20

inch 0.79

N16.67r 9.81 16.67 r 4.90

lbs 3.7 r 2.2 3.7 r 1.1

N13.73r 9.81 13.73 r 4.90

lbs 3.1 r 2.2 3.1 r 1.1

U35S (KTC, KCL)

U35-3S (KTA)

0

20 > 15 > height 1m, 10

0.79 > 0.59 >

KX91-3S

(KTC, KCL, KTA)

Remarks

100 times actual
digging cylinder
dislocation

100 times

50r5qC

bucket

min.

heapedu1.8

II - 10

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

1 3 Arm lever crowd kgf 1.7 r 1.0 1.7 r 0.5 Extend & crowd

N16.67r 9.81 16.67 r 4.90

lbs 3.7 r 2.2 3.7 r 1.1

4 extend kgf 1.4 r 1.0 1.4 r 0.5

N13.73r 9.81 13.73 r 4.90

lbs 3.1 r 2.2 3.1 r 1.1

5 Bucket lever crowd kgf 1.2 r 1.0 1.2 r 0.5 Dump & crowd

N 11.77 r 9.81 11.77 r 4.90

lbs 2.6 r 2.2 2.6 r 1.1

6 extend kgf 1.2 r 1.0 1.2 r 0.5

N 11.77 r 9.81 11.77 r 4.90

lbs 2.6 r 2.2 2.6 r 1.1

7 Swivel (Swing) lever R kgf 1.2 r 1.0 1.2 r 0.5 Left & right

N11.77r 9.81 11.77 r 4.90

lbs 2.6 r 2.2 2.6 r 1.1

8Lkgf1.2r 1.0 1.2 r 0.5

N11.77r 9.81 11.77 r 4.90

lbs 2.6 r 2.2 2.6 r 1.1

9 Dozer lever up kgf 2.0 r 0.5 Up & down

N 19.61 r 4.90

lbs 4.4 r 1.1

10 down kgf 2.0 r

N19.61r 4.90

lbs 4.4 r 1.1

11 Travel lever L Forward kgf 1.8 r 0.5

N 17.65 r 4.90

lbs 4.0 r 1.1

12 Back kgf 1.8 r 0.5

N17.65r 4.90

lbs 4.0 r 1.1

13 R Forward kgf 1.8 r 0.5

N 17.65 r 4.90

lbs 4.0 r 1.1

14 Back kgf 1.8 r 0.5

N17.65r 4.90

lbs 4.0 r 1.1

15 Accelerator lever up kgf 5.0 r 1.0 AI-version has

N 49.03 r 9.81

lbs 11.0 r 2.2

16 down kgf

N

lbs

17 Swing pedal R kgf 5.0 r 1.0

N49.03r 9.81

lbs 11.0 r 2.2

18 L kgf 5.0 r 1.0

N 49.03 r 9.81

lbs 11.0 r 2.2

U35S (KTC, KCL)

U35-3S (KTA)

0.5

3.5 r 1.0

34.32 r 9.81

7.7 r 2.2

KX91-3S

(KTC, KCL, KTA)

Remarks

accel.

II - 11

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

1 19 Safety lock

lever

20 down kgf

21 L up kgf 2.7 r 1.0 Up & down

22 down kgf 6.0 r 1.0 5.0 r 1.0

23 Travel Hi-Lo change kgf 1.5 r 0.5 3.1 r 1.0

2 1 Boom lever stroke up mm 110 r 10

2 down mm 110 r 10

3 Arm lever stroke crowd mm 110 r 10

4 extend mm 110 r 10

5 Bucket lever stroke crowd mm 85 r 10

6 Bucket lever stroke extend mm 85 r 10

7 Swivel, swing lever stroke R mm 85 r 10

8Lmm85r 10

9 Dozer lever stroke up mm 55 r 10

10 down mm 55 r 10

11 Tra vel lever

stroke

12 Back mm 73 r 10 75 r 10

13 R Forward mm 73 r 10 75 r 10

14 Back mm 73 r 10 75 r 10

15 Accel. Lever mm 55 r 10 65 r 10

Rupkgf0.8r 0.2 Up & down

N7.85r 1.96

lbs 1.8 r 0.4

N

lbs

N26r 10

lbs 19.5 r 7.4

N49r 10 49.03 r 9.81

lbs 43.4 r 7.4 11.0 r 2.2

N39r 10 30.40 r 9.81

lbs 10.8 r 3.6 6.8 r 2.2

inch 4.33 r 0.39

inch 4.33 r 0.39

inch 4.33 r 0.39

inch 4.33 r 0.39

inch 3.35 r 0.39

inch 3.35 r 0.39

inch 3.35 r 0.39

inch 3.35 r 0.39

inch 55.00 r 0.39

inch 2.17 r 0.39

L Forward mm 73 r 10 75 r 10

inch 2.87 r 0.39 2.95 r 0.39

inch 2.87 r 0.39 2.95 r 0.39

inch 2.87 r 0.39 2.95 r 0.39

inch 2.87 r 0.39 2.95 r 0.39

inch 2.17 r 0.39 2.56 r 0.39

U35S (KTC, KCL)

U35-3S (KTA)

0.4 r 0.2

3.92 r 1.96

0.9 r 0.4

KX91-3S

(KTC, KCL, KTA)

Remarks

II - 12

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit

Q9 Stability

1 1 Standard arm,

Dynamic opera­tion load limit

2 Front, dozer upkgf -

3 Bucket load to

4 Front, dozer upkgf - 294

5 Standard arm,

static limited
load

6 Front kgf 450 428

Q10 Comfortability

1 1 Noise level At operator's

2Cabdb(A)81 > Cab door close
3 Noise
4db(A)95>

Bucket load to
10 degrees tip­ping

tip fully

Bucket load to
tip fully

ear LPA

source;LWA

Side,
dozer up

Side,
dozer up

Side kgf 430 393

Canopy db(A)

7m db(A)

kgf - Arm extend,

N-

lbs -

N­lbs ­kgf - 276

N - 2706.64
lbs - 608.5

N - 2883.16
lbs - 648.2

N 4216.86 3854.01
lbs 948.0 866.4

N 4412.99 4197.25
lbs 992.1 943.6

U35S (KTC, KCL)

U35-3S (KTA)

81 > 80 >

KX91-3S

(KTC, KCL, KTA)

b u c k e t c r o w d
oil temp.50r5qC
(122r41qF)

Remarks

II - 13

WSM Minor Change II Service Engineering Section

KX121-3S, 161-3S : KTC, KCL, KTA Version
Machine specification : Service port, TPSS, Arm rest, Long arm, 4 POSTcanopy, KTC-bucket

No Specificatios Items Unit KX121-3S KX161-3S Remarks

Q1 Main Speed JIS A8404

1 1 Machine size Total length (Transport) mm 5090 r 102 5540 r 111

inch 200.4 r 4.0 218.1 r 4.4

2 Total width mm 1700 r 17 1960 r 20

inch 66.9 r 0.7 77.2 r 0.8

3 Total height (Canopy) mm 2495 r 25

inch 98.2 r 1.0

4 Total height (Cabin) mm 2480 r 25 2540 r 25

inch 97.6 r 1.0 100.0 r 1.0

2 1 Weight Machine weight (Canopy) kg 4030 r 81 5065 r 101 Fuel tank

lbs 8884.5 r 178.6 11166.3 r 222.7

2 Machine weight (Cabin) kg 4095 r 82 5140 r 103

lbs 9027.8 r 180.8 11331.6 r 227.1

3 1 Performance Swivel speed L rpm 9.2 r 0.9 9.3 r 0.9

2Rrpm9.2r 0.9 9.3 r 0.9
3 Travel speed Lubber F1 km/h 3.0 r 0.3

mph 1.86 r 0.19

4 Lubber F2 km/h 5.0 r 5 4.6 r 0.5

mph 3.11 r 3.11

5 Iron F1 km/h 2.9 r 0.3

mph 1.80 r 0.19 1.43 r 0.12

6 Iron F2 km/h 4.7 r 0.5

mph 2.92 r 0.31

7 Gradeability deg 30 30

4 1 Rear end min. turning radius mm 1300 r 26 1090 r 22

inch 51.2 r 1.0 42.9 r 0.9

2 Swivel frame rear ground clearance mm 574 r 11 620 r 12

inch 22.6 r 0.4 24.4 r 0.5

3 Tambler center distance mm 1710 r 51 1990 r 60

inch 67.3 r 2.0 78.3 r 2.4

4 Crawler total length mm 2175 r 65 2500 r 75

inch 85.6 r 2.6 98.4 r 3.0

5 Crawler total width mm 1700 r 34 1960 r 39

inch 66.9 r 1.3 77.2 r 1.5

6 Min. ground clearance mm 330 r 10 320 r 10

inch 13.0 r 0.4 12.6 r 0.4

5 1 Front attach-

ment

2 SAE, JIS m3 0.12 0.14

3 Bucket width mm 600 r 12 Without side cut-

4 Swing angle Canopy L deg 75 r 2
5 Canopy R deg 48 r 2
6 Cabin L deg 75 r 2
7 Cabin R deg 48 r 2
8 Max. digging radius mm 5600 r 16 6260 r 94

Bucket
heaped
capacity

CECE m3

yd3

yd3 0.16 0.18

inch 23.6 r 0.5

inch 220.5 r 0.6 246.5 r 3.7

2.5 r 0.2

1.55 r 0.12

2.86 r 0.31

2.3 r 0.2

4.2 r 0.4

2.61 r 0.25

ter

II - 14

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit KX121-3S KX161-3S Remarks

5 9 Front attach-

ment

10 Ground level Min. finish

11 Max. digging depth mm 3505 r 70 3830 r 77

12 Max. vertical digging depth mm 2480 r 74 2585 r 78

13 Max. digging

14 Cabin mm 5420 r 108 5715 r 14

15 Max. dump

16 Cabin mm 3890 r 78 4155 r 83

17 Max. dump

18 Cabin mm 1250 r 37 1285 r 39

19 Front attach-

ment

20 Cabin mm 2060 r 62 2420 r 73

21 Mini. turning

22 Cabin mm 1665 r 50 1995 r 59

6 1 Dozer Width mm 1700 r 51960r 5

2 Height mm 350 r 20 360 r 10

3 Max. lift above GL mm 395 r 50 455 r 50

4 Max. below GL mm 410 r 50 370 r 50

Q2 Main Specs JIS A8404

1 1 Bucket tooth slaggish mm 50

2mm0

3 Dozer's declination mm 3

2 1 Eccentric amount from swing center mm 195 170 From swivel cen-

2 Distance to swing center mm

3 1 Approach angle deg 30 r 3
4 1 Crawler height mm 470 r 9 520 r 10 Include grouser

2 Max. crawler height mm 490 r 10 550 r 11

Ground level Max. digging
radius

radius

Conopy mm 5420 r 108 5715 r 14

height

Conopy mm 3890 r 78 4155 r 83

height

Conopy mm 1250 r 37 1285 r 39

height (Arm
vertical)

Mini. turning
radius

radius (Left
swing)

Conopy mm 2060 r 62 2420 r 73

Conopy mm 1665 r 50 1955 r 59

mm 5475 r 82 6130 r 92

inch 215.6 r 3.2 241.3 r 3.6

mm 1805 r 36 1940 r 39 Bucket bottom

inch 71.1 r 1.4 76.4 r 1.5

inch 138.0 r 2.8 150.8 r 3.0

inch 97.6 r 2.9 101.8 r 3.1

inch 213.4 r 4.3 225.0 r 0.6

inch 213.4 r 4.3 225.0 r 0.6

inch 153.1 r 3.1 163.6 r 3.3

inch 153.1 r 3.1 163.6 r 3.3

inch 49.2 r

inch 49.2 r 1.5 50.6 r 1.5

inch 81.1 r 2.4 95.3 r 2.9

inch 81.1 r 2.4 95.3 r 2.9

inch 65.6 r 2.0 77.0 r 2.3

inch 65.6 r 2.0 78.5 r 2.3

inch 66.9 r 0.2 77.2 r 0.2

inch 13.8 r 0.8 14.2 r 0.4

inch 15.6 r 2.0 17.9 r 2.0

inch 16.1 r 2.0 14.6 r 2.0

inch 1.97

inch 0

inch 0.12

inch 7.68 6.69

inch

inch 18.50 r 0.35 20.47 r 0.39

inch 19.29 r 0.39 21.65 r 0.43

1.5 50.6 r 1.5

horizontal

ter

on the spocket

II - 15

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit KX121-3S KX161-3S Remarks

Q3 Engine performance

1 1 Max, engine

rpm

2 1 pump relief rpm - ­3 2 pump relief rpm - ­4 3 pump relief rpm - - Boom, arm,

5 2 pump relief rpm 2250  2150d
6 Dozer+2 pump relief rpm 2250

2 1 Idler rpm 1100 +50, -150

Q4 Travelling performance

1 1 Travel motor

block perfor­mance

2 Travel motor

block perfor­mance

2 1 Max, Traction

force

2 F2 kgf 1455 1972

3 1 Travel straight-

ness

2F2 mm600

3 Dozer F1 mm 600 Dozer up &

4 Dozer R1 mm 600

4 1 Track shoe sag

distance

2 Rubber mm 10 r 5

Q5 Work performance

1 1 Boom lifting capacity kgf 734 790 Front end, Arm

2 Arm digging force kgf 1790 2253 Bucket tooth

3 Bucket digging force kgf 3005 5043 Machine stance

4 Dozer force down kgf 3160 4170 Cutting edge

no load rpm 2450 d

Lmm272 300t 261 , 300t 20 deg, 10 min

inch 10.71  11.8t 10.28 , 11.8t

Rubber mm 272  300t 261 , 300t

inch 10.71 11.8t 10.28 , 11.8t

F1 kgf 3081 4083 On the center

kN 30.2 40.0
lbs 6792 9001

kN 14.3 19.3
lbs 3208 4348

F1 mm 600 10m distance

inch 23.62

inch 23.62

inch 23.62

inch 23.62

Iron mm 40 r 5

inch 1.57 r 0.20

inch 0.39 r 0.20

kN 7.2 7.7

lbw 1618 1742

kN 17.6 22.1

lbw 3946 4967

kN 29.5 49.5

lbw 6625 11118

kN 31.0 40.9

lbw 6967 9193

2400 d

swivel

2200 , 2100d
2200 , 2100d
1200 +50, -150

down 10m dis­tance

extend bucket
crowd, at tooth

root

to JIS bucket
tooth root

down force at
ground level

II - 16

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit KX121-3S KX161-3S Remarks

2 1 Boom speed Canopy up (GoT) sec 2.7 r 0.3 Oil temp.

2 up (LoT) sec 4.9 r 0.3
3 down(ToG) sec
4 down sec 5.1 r 0.3 4.6 r 0.3
5 Cabine up 1st sec
6 up 2nd sec 4.9 r 0.3 4.7 r 0.3
7 down sec
8 down sec 5.1 r 0.3 4.6 r 0.3

3 1 Arm speed crowd sec 3.2 r 0.3 3.1 r 0.3

2 extend sec 2.8 r 0.3

4 1 Bucket speed crowd sec 2.7 r 0.3 2.9 r 0.3 Oil temp.

2 dump sec 2.2 r 0.3 2 r 0.3

5 1 Dozer speed up (GoT) sec 1.2 r 0.3 1.5 r 0.3 Max. down to

2 up (LoT) sec

3 down(ToG) sec 1.4 r 0.3
4 down (ToL) sec 3.0 r 0.3 3.8 r 0.3

6 1 Arm cylinder cavitation mm 0, 5 t 0, 0.5 t Oil temp.

inch 0 0

7 1 Max. digging

height radius

2 Cabine mm 2825 r 282 3640 r 364

3 Max. dump

height radius

4 Cabine mm 2790 r 167 3325

5 Bucket bottom

height at arm
vertical

6 Cabine mm 1585 r 415 1600

7 Bucket wrist angle degree 197 r 3 168.5 r 3

Q6 Swivel, swing performance

1 1 Swivel torque L kgfm 840 1265 Arm

2Rkgfm 840 1265

2 1 Swivel angle L deg 20 17 Bucket load=JIS

2Rdeg2017

3 1 Swivel block performance L deg 0

2 R deg 0 5 >
3 L deg 30 30 >
4 R deg 30 30 >

4 1 Swivel start-up speed L sec 2.1 r 0.3 2.5 r 0.3 0~90 deg swivel

2Rsec2.1r 0.3 2.5 r 0.3

Canopy mm 2825 r 282 3640 r 364

inch 111.22 r 11.10 143.31 r 14.33

inch 111.22 r 11.10 143.31 r 14.33

Canopy mm 2790 r 167

inch 109.84 r 6.57

inch 109.84 r 6.57 130.91

Canopy mm 1585 r 415 1600 Bucket horizon-

inch 62.40 r 16.34 62.99

inch 62.40 r 16.34 62.99

kN.m 8.2 12.4

ftlbs 6075 9149

kN.m 8.2 12.4

ftlbs 6075 9149

2.7 r 0.3

2.7 r 0.3

2.7 r 0.3

2.3 r 0.3 2.5 r 0.3 Max. up to max.

4.7 r 0.3

3.1 r 0.3

1.9 r 0.3

3325 at bucket pin

130.91

5 >

50r5qC(122r41q
F)
Ground to max.
height (excu­lude cushioning)

50r5qC(122r41q
F)

max. up

down

95r5qC(203r41q
F)

tal

extend,show/
Quick

u1.8

heaped

II - 17

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit KX121-3S KX161-3S Remarks

5 1 Swing speed Canopy L sec 6.7 r 0.7 6.7 r 0.5

2Rsec
3 Cabine L sec
4Rsec6.5 r 0.7 7.7 r 0.5

6 1 Swing Lock Swivel R&L mm 2 2, 10 > 90 deg-swivel,

inch 0.08

2 Reciprocating

motion

Q7 Hydraulic performance

1 1 Relief pressure setting P1 kgf/cm2 250 +10, -5

2P2kgf/cm2-

3P3kgf/cm2-

4P4kgf/cm240r 5.1

2 1 Cylinder oil

sealing capacity

295r5qC

3Arm50r5qC

4Bucket50r5qC

5 Dozer 50r5qC

3 1 Boom cushioning performance 30qC(86qF) sec 3

250qC(122qF) sec 0.4 to 1.3
380qC(176qF) sec 0.3

Q8 Lever operating force & stroke

1 1 Boom lever operating force up kgf

2 down kgf 1.5 r 0.5

3 Arm lever crowd kgf

4 extend kgf 1.5 r 0.5

L / R Swing mm 90 deg-swivel,

inch 

MPa 24.5 +1.0, -0.5

bar 24.5 +10, -5 24.5 +10, -5

psi 3556 +140, -70

MPa -

bar -

psi -

MPa -

bar -

psi -

MPa 3.9 r 5.0

bar 3.9 r 5.0

psi 569 r 73

Boom 50r5qC

(122r41qF)

(203r41qF)

(122r41qF)

(122r41qF)

(122r41qF)

mm 20 Arm extend,

inch 0.79

mm 20

inch 0.79

mm 20

inch 0.79

mm 10 Bucket load=JIS

inch 0.39

mm 20 3

inch 0.79 0.12

N 17.65 r 4.90

lbs 4.0 r 1.1

N 14.71 r 4.90

lbs 3.3 r 1.1

N

lbs 4.0 r 1.1

N 14.71 r 4.90

lbs 3.3 r 1.1

6.5 r 0.7 7.7 r 0.5

6.7 r 0.7 6.7 r 0.5

100 times actual
digging cylinder
dislocation

100 times

245 +10, -5 At pump deliv-

24.0 +1.0, -0.5

3485 +140, -70

1.8 r 0.5

1.8 r 0.5 Extend & crowd

17.65 r 4.90

ery 50r5qC

bucket

height 1m, 10
min.

heaped

u1.8

II - 18

WSM Minor Change II Service Engineering Section

No Specificatios Items Unit KX121-3S KX161-3S Remarks

1 5 Bucket lever crowd kgf 1.5 r 0.5 Dump & crowd

N 14.71 r 4.90

lbs 3.3 r 1.1

6 extend kgf

N 17.65 r 4.90

lbs 4.0 r 1.1

7 Swivel (Swing) lever R kgf 1.5 r 0.5 Left & right

N 14.71 r 4.90

lbs 3.3 r 1.1

8Lkgf1.5r 0.5

N 14.71 r 4.90

lbs 3.3 r 1.1

9 Dozer lever up kgf

N 9.81 r 4.90 23.54 r 4.90

lbs

10 down kgf

N 14.71 r 4.90 23.54 r 4.90

lbs

11 Travel lever L Forward kgf

N 11 .77 r 4.90 14.71 r 4.90

lbs

12 Back kgf

N 11 .77 r 4.90 14.71 r 4.90

lbs

13 R Forward kgf

N 11 .77 r 4.90 14.71 r 4.90

lbs

14 Back kgf

N 11 .77 r 4.90 14.71 r 4.90

lbs

15 Accelerator lever up kgf 5 r 1.0 r AI-version has

N 49.03 r 9.81 -

lbs 11.0 r 2.2 -

16 down kgf 3.5 r 1.0 -

N 34.32 r 9.81 -

lbs 7.7 r 2.2 -

17 Swing pedal R kgf

N

lbs

18 L kgf

N

lbs 9.0 r 2.2

1.8 r 0.5

1.0 r 0.5 2.4 r 0.5 Up & down

2.2 r 1.1 5.3 r 1.1

1.5 r 0.5 2.4 r 0.5

3.3 r 1.1 5.3 r 1.1

1.2 r 0.5 1.5 r 0.5

2.6 r 1.1 3.3 r 1.1

1.2 r 0.5 1.5 r 0.5

2.6 r 1.1 3.3 r 1.1

1.2 r 0.5 1.5 r 0.5

2.6 r 1.1 3.3 r 1.1

1.2 r 0.5 1.5 r 0.5

2.6 r 1.1 3.3 r 1.1

accel dial not a
lever.

3.4 r 1.0

33.34 r 9.81

7.5 r 2.2

4.1 r 1.0

40.21 r 9.81

II - 19