Wheel Loader

Specifications L 25.5

Service weight 13.7 t – 14,5 t

Engine output 130 kW
Loading buckets 2.3 – 6.0 m3

• Universal geometry with parallel

guide
• Electro-hydraulic servo control
• 10% bigger bucket capacity
• ZF Ergopower transmission
• Higher torque,
higher tractive forces
• Ultramodern ergonomic cab
• Easy servicing from the ground
 L 25.5: more power, improved universal geometry, ele

CE seal according to EC Ma-

chinery Directive
TÜV certificate for compliance
with DIN ISO EN 9001

Easy controllability and ample

flexibility through electro-hydraulic
servo control

Universal geometry for earthmoving

and parallel operation

Wet multi-disc hub-mounted brakes

for easy access without removing
the wheels

2
ctro-hydraulic servo control, new deluxe cab

Hydraulically cushioned cab with multi-

functional control lever and electronic
management system

Electronic immobilizer
standard

Excellent all-round visibility, stylish tail-end

for even more rear safety

Fuel-efficient 6-cylinder
Cummins engine delivers
130 kW (177 HP)

Easy service-
ability from the
ground

Best possible power transfer Multi-disc self-locking differential and ZF

with larger, widely spaced Ergopower transmission for powerful
bearings tractive forces even across difficult terrain

3
 Proven Lear geometry again improved

Merging the benefits of Z- and parallel geometry

With its further improved universal geometry O&K has set

new standards in wheel loader flexibility. The systems used
until now each had their specific advantages: Z-geometry
generated high digging forces at ground level while indu-
strial geometry permitted parallel fork control across the
entire lift range as well as strong lifting capacities when
clamping pipes or logs

O&K’s universal geometry merges the benefits of both sy-

stems into one. Ample breakout force stays virtually con-

4
 stant across the entire lift range and any slackening of lift
force (as is typical on Z-geometry) is ruled out. What’s more,
this system guarantees absolutely precise until now una-
chievable parallel control at all working positions (optional
function). Two sensors constantly record the positions of
Lift height (m) the lift frame and tilt control lever. The actual values are
4 Z-geometry PZ-geometry Universal geometry then electronically compared with the stored target data
3,5 and the working attachment is automatically guided into
the ideal position. This makes life a lot easier for the ope-
3
rator who need not make continuous adjustments.
2,5
The structure is of simple and hence rugged design. Ope-
2
rator visibility is excellent. A taller dump height and ideal
1,5
reach have improved truck loading functions considerably.
1 The mast profile is redesigned to prevent damage to the
0,5 truck‘s sidewalls.

0
40 50 60 70 80 90 100 110 120 130 140
Breakout force (kN)

Significant breakout boost using universal geome-

try compared with other systems (schematic)

Lift Tilt
cylinder cylinder 3rd function

Controller Electro-hydraulic Steering

control

Engine RPM
Priority circuit

Position
sensors

5
 Smart electro-hydraulic control

Innovative developments and longstanding experience in bility. No mechanical/hydraulic components and hence no
microchip technology have enabled O&K to completely re- servicing or repair of such components.
design the wheel loader electronic control system. Until
The electro-hydraulic system also takes care of additional
now, the various functions had been performed by a large
functions such as ground-level return-to-load after dump-
number of mechanical-hydraulic components, on the L 25.2
ing or bucket shake-out intensity.
these basic and supplementary functions are mastermin-
ded electro-hydraulically by smart software. When the lift Electronic control handles many of the chores previously
frame rises to exceed a certain height, the electronics au- left to the operator. Controllability is significantly improved
tomatically shuts off the lifting function. Re-setting the desi- and the multifunctional lever works as smoothly and effort-
red lift height is just as uncomplicated. Instead of the hard- lessly as a joystick.
ware adjustments required previously, now the operator
simply presses the ”teach-in” key and the new maximum
height is immediately stored. This makes the work a lot
easier for the operator and improves the equipment’s flexi-

New ZF Ergopower transmission

has its own pressure regulator, shifting is smooth, with no

interruption in tractive force. In fact, the operator barely
notices the automatic gear shifting, and spine and spillage
are spared.
All the important operating data is continuously logged and
any variances from preset values are displayed. The
machine’s own diagnosis system constantly monitors all
the main control components and if any part should fail,
the control system shifts back into a safer mode. This les-
sens the risk of damage and improves durability.
The improved mechanical efficiency and automatic shifting
help to accelerate handling speed while cutting fuel con-
sumption.

The new Ergopower transmission is a standard-setter in

terms of travel performance, shiftability and noise reduc-
tion. Slim-contoured gearing, generous helical overlapping
and distor tion-proof short shafts combine to cut noise
emissions by over one half. As each of the six couplings

Rugged Cummins construction machinery engine

The clean, water-cooled Cummins engine with turbocharger service life. The outstanding torque curve and the low idling
and intercooler has a lot extra power. Teamed up with the speed combine to deliver ample lugging forces and fuel
new transmission, the engine generates higher torque and efficiency.
improved tractive forces while the low speeds extend

6
 Single-handedly

Lift, lower, roll-back, dump, gearshifting, backing ... all

single-handedly. The computerized controls allow certain
functions to be automated such as return-to-loading positi-
on and additional chores in the form of a ”black-white” mode
using the multi-functional lever. The ”teach-in” key tells the
machine what to do in a fraction of a second. All in all,
standard-setting comfort.

Bigger bucket

A generous dump angle easily in excess of 90° makes

emptying easier while allowing the machine to extricate
itself from tricky situations. When working with highly adhesive
loads, the shake-out intensity can be electronically adjusted.
The bucket is 10% bigger but as both engine and pump End-of-stop is also adjustable, cushioned or aggressive.
output are up, the heavier loads are easily handled. The
result: more material handled day in, day out.

Multi-disc brakes and self-locking differentials

Hydraulic dual-circuit brakes and wet multi-disc brakes in

the wheel hubs ensure safe braking response. The brakes
themselves are easily accessible without removing the
wheels.

The automatic self-locking differential provides ideal power

transfer, excellent traction and crowding forces even on
difficult terrain.

7
Weights and dimensions

48°

1050
3900

3355
2810

46°

40°

500 440 35°

3255

7300

with tyres
20.5 R 25 EM
Width over tyres mm 2465
Track mm 1940
Ar tic angle ° +/- 42
Overall length mm 7465
Turning radius (to outside edge of bucket)
(bucket in carry) mm 6045
Turning radius (to outside edge of tyres) mm 5495

Operating data Standard buckets

with teeth
Capacity (SAE/CECE) heaped m3 2.5
Perm. spec. loose weight t/m3 1.8
Bucket width mm 2650
Bucket weight kg 1195
Breakout force (ISO) kN 108
*Tipping load, straight (static) kg 11200
*Tipping load, art. 42° (DIN 24094)) kg 9700
*Service weight kg 13750

*Including all lubricants, a full tank, 20.5 R 25 L-3 tyres, ROPS/FOPS cab and operator. Ser vice weight and static
tipping load depend on tyres and/or any special equipment.
All figures approximate.

8
 Engine Tyres

Cummins diesel 6BTA 5.9–C174 Standard 20.5 R 25 XHA

Water cooled • Direct injection, turbocharged, intercooler Other options
Engine output SAE J1995 brutto 130 kW / 2200 RPM 555//70 R25 XLD70
Max. torque 20.5 R25 RL-2+
at 1500 RPM 767 Nm 20.5 R25 XLDD2A
Cylinders / displacement 6 / 5900 cm3 20.5 R25 X-Mine D2
Bore / stroke 102 mm / 120 mm
Voltage 24 V
2 batteries each 12 V / 92 Ah
Alternator 980 W Brakes
Star ter 4 kW
Exhaust emissions to COM 95/350 Step 1
Hydraulic dual-circuit pump accumulator, with hub-mounted wet
multi-disc brakes • Additional pedal for automatically discon-
necting power from the transmission during work
Parking brake: disc-type acting on the transmission
Hydraulics

Load sensing attachment hydraulics • 2 variable-displacement

pumps with steering priority • Deliver y independent of load pres-
sure Steering
Max. output, attachment pumps 210 l/min
Operating pressure 280 bar Angle-angle, any-height steering wheel (optional) • Mid-mounted
ar tic steering with load-sensing variable displacement pump •
Two double-acting hydraulic cylinders • Maintenance-free artic
joint • Emergency steering
Torque converter
Max. pressure 190 bar
Ar tic angle 42°
Single-stage, integrated with transmission

Conversion ratio 2.3 : 1

Heat-exchanger cooling Loading attachment

Universal Lear geometry for both ear thmoving and industrial ap-
Transmission plications • Frame from solid steel with torsion-stiff cross-mem-
bers • Sealed mounting points • Multi-functional lever
Full powershift, 4 for ward and 3 reverse gears shifting on-the-go
Function Lift Lower Dump Total
• Automatic shifting • Multi-functional lever for gear shifting and
Sec. 5.5 3.0 2.2 10.7
loader functions

Travel speed Capacities

Travel speeds in km/h with 20.5 R 25 tyres Fuel 200 l

Gear For ward Reverse Engine oil and filter change 18 l
1 st 6.5 5.9 Transmission and torque conver ter 18 l
2 nd 12 10.7 Front axle/wheel hubs 15/13 l
3 rd 22 23.9 Rear axle/wheel hubs 13/13 l
4 th 35 Hydraulics total 160 l

Axles Cab

All-wheel-drive Noise-insulated cab • Hydraulic cushioning • Folding door locks

Front axle Rigid, with multi-disc self-locking dif ferential into place • Lockable sliding windows • ROPS to DIN/ISO 3471/
Rear axle Rigid, optional with multi-disc self-locking dif- SAE J 1040 c • FOPS to DIN/ISO 3471/SAE J 231
ferential
Ar ticulating angle +/- 12°
Wheel-hub mounted planetar y gears

9
 Standard equipment Optional equipment

CE seal as per EC Directive 89/322 EEC Standard for Germany:

Noise insulated removable ROPS/FOPS cab • Fitted for road traffic
Engine-oil heater and defroster nozzles • Venti- TÜV approved
lation options: recirculating or outside air • Air Optional:
filter • Electric windscreen wipers, washers, front Loading bucket (with or w/o teeth)
and rear • Heated rear window • Steplessly ad- Light-materials bucket
justable, vibration dampened swing seat • Adju- High-dump bucket
stable steering column • Multi-functional lever Hydraulic quick-hitch
and automatic gear shifting • Towing device • Variable bucket stop cushioning
Float position • Standard tool kit •2 spot lights Parallel guide for fork lift operation
front, 1 rear Cutting edge
Fork lift
Inside/outside noise levels to the new EEC Di-
rective 86/662 Log grapple
Additional spot light
Electronic monitoring and warning lamps for the Oil-bath dr y filter
following functions: 4th gear lock (max. 25 km/h)
Torque converter oil temperature, transmission Electronic speed limit
oil pressure, engine oil temperature, engine oil Acoustic reversing warning signal
pressure, v-belts, blower, batter y charge Amber beacon
Other displays and warning lamps: Additional tools
Gear shift position display, fuel meter, opera- Bucket horizontal guide
ting hours meter, speedometer, beacon, direc- 3rd circuit for hydraulic attachments
tion indicators, main lights, warning light for hy- Air conditioning
draulic tank, air filter contamination indicator OLS
Eco-friendly hydraulic liquid (Panolin)

Types of bucket – Loose weights – Filling degree

Standard bucket at quick-hitch 2.3 m3 at g = 1.8 t/m3

Standard bucket 2.5 m3 at g = 1.8 t/m3
Bulk material bucket 2.7 m3 at g = 1.6 t/m3 3.0 m3
6.0 m3 at g = 0,5 t/m3 Filling degree:
Bucket volume

Light materials bucket, at quick-hitch

High-dump bucket (4.10 m at quick-hitch) 4.0 m3 at g = 0.5 t/m3* 120 %
Log grapple at quick-hitch 1.4 m3 100 %
80 %
Fork lift 1200 mm/1500 mm
2.7 m3
* no TÜV
Material Density Bucket fill
2.5 m3
3
Soil 1.5 – 1.6 t/m 100 – 110 %
Clay 1.5 – 1.7 t/m3 100 – 110 %
Sand 1.4 – 1.8 t/m3 100 – 110 % 1.4 1.6 1.8
Gravel 1.5 – 2.0 t/m3 100 – 105 %
Loose weights t/m 3 (ISO 7546)
Rock 1.6 – 2.0 t/m3 75 – 100 %
Actual volumes normally exceed ISO/SAE.

O&K Orenstein & Koppel AG

Staakener Str. 53-63
D-13581 Berlin
E-Mail: info@orenstein-koppel.com
http://www.orenstein-koppel.com

Alterations without prior notice. The illustrations do not necessarily show the standard version of the machine. Any statement on
E 574.1/2-0101 the quality or use of the products shall be deemed approximate and without obligation and not construed to be an express warranty
Printed in Germany of quality or merchantability. Performance shall expressly be governed by the contractual agreement.