Join Machinery Auction 18th-22nd June. 100+ Inspected equipment. No reserve. Fully refundable deposit. Call us at: +971 52 114 4423
logo
100K+ machines in details.

Komatsu WB91 Backhoe loaders tech specs

makana img
video play button
Video[1]
Interior [2]
Exterior [4]
Attachments [2]
1999-2006
130.2 liter Fuel cap
310.07 Nm Max torque
61.52 kw Net power
8,580 kg Operating weight
5.91 m Overall Length
2.35 m Overall Width

A backhoe loader with an 8,580 kg operating weight, the Komatsu WB91 combines 61.52 kilowatt net power with a 4.51 m standard backhoe digging depth and full powershift transmission for excavation, loading, trenching, and site support work. With its 1.07 cu m bucket, 165.03 lpm variable-flow hydraulic system, and extended digging depth of 5.67 m, it is suited for contractors who need strong reach, loader capacity, and steady performance across mixed construction jobs.

Operating weight 8,580 kg

Net power 61.52 kilowatt

Maximum torque 310.07 Nm

Backhoe digging depth 4.51 m

Extended backhoe digging depth 5.67 m

Bucket capacity 1.07 cu m

Hydraulic pump flow 165.03 lpm

Makana rating

Owner rating

 | 3

Market average

AED 220,000

Starting from

AED 140,000

Komatsu WB91 Technical specifications

Engine

Alternator supplied amperage

60 Amh

Aspiration

Naturally aspirated

Gross power

67.71 kw

Net power

61.52 kw

Number of cylinders

4

Power measured @

2,200 rpm

Torque measured @

1,500 rpm

General

Backhoe digging depth

4.51 m

Bucket capacity

1.07 cu m

Bucket digging force

3570.05 kg

Bucket width

232 cm

Displacement

4413.05 cu cm

Engine model

4D106-1FA

Loader dump height

2.77 m

Loader dump reach

0.76 m

Max speed forward

40.07 kph

Max torque

310.07 Nm

Operating voltage

12 V

Operating weight

8,580 kg

Transmission type

full powershift, Electronic Gear Management

Wheelbase

2.19 m

Backhoe

Backhoe reach from swivel

5.58 m

Loader

Breakout force

6080.59 kg

Loader digging depth

11.18 cm

Service refill capacities

Cooling fluid cap

18.17 liter

Front axle fluid capacity

8.33 liter

Fuel cap

130.2 liter

Hydraulic fluid cap

92.35 liter

Rear axle fluid capacity

18.55 liter

Transmission fluid cap

16.28 liter

Refill capacities

Engine oil cap

8.71 liter

Operating specifications

Extended backhoe digging depth

5.67 m

Extended backhoe dump height

3.51 m

Extended backhoe dump reach

6.55 m

Extended backhoe reach from swivel

6.55 m

Tires

Front tires size (2WD)

12.5/80 R18- 10 PR

Rear tires size

16.9 x 28 - 10 PR

Dimensions

Ground clearance

0.46 m

Height - top of cab

2.77 m

Overall Length

5.91 m

Overall Width

2.35 m

Turning radius

5.46 m

Transmission

Max speed reverse

40.07 kph

Number of forward gears

4

Number of reverse gears

4

Hydraulic system

Pump flow cap

165.03 lpm

Pump type

Variable flow, axial piston

Relief valve pressure

185 bar

View more
Download datasheets
OEM product brochure

Komatsu WB91 expert review

Reviewed by Jed H. on May 5, 2026

Overview

The Komatsu WB91 (1999–2006) is a capable backhoe loader designed for trenching, loading, backfilling, utility work, and general construction support. It delivers 61.52 kilowatt net power, 310.07 Nm torque, and an 8,580 kg operating weight, giving it a stable working profile with strong hydraulic support.

Expert rating: 4 stars

Pros Strong 165.03 lpm hydraulic flow and up to 5.67 m extended digging depth for demanding site tasks.
Cons Turning radius of 5.46 m can limit maneuverability in tight jobsite areas.

Performance & Efficiency

The 61.52 kilowatt engine produces 310.07 Nm of torque, giving the WB91 steady performance for excavation, loading, and backfilling. Its 1.07 cu m bucket, 5.67 m extended backhoe digging depth, and 165.03 lpm hydraulic pump flow make it useful for contractors handling trenching, utilities, and mixed site support work.

In Comparison

Komatsu WB156: Stronger torque and a newer backhoe loader platform.
Komatsu WB70: Lighter and easier to manage, but less capable in reach and hydraulic output.
Komatsu WB91: Better suited for buyers who want stronger hydraulic flow, larger bucket capacity, and deeper extended digging reach.

Final Verdict

Rated 4 stars, the Komatsu WB91 is a capable backhoe loader within the AED 140,000–220,000 range, offering strong hydraulic performance, good reach, and practical versatility for construction and utility work.

Show less

Komatsu WB91 owner rating

Komatsu WB91 Backhoe loaders [1999-2006]

1999-2006

Overall rating

Based on 3 ratings

4.3
performance

4.0

comfort

4.7

fuel efficiency

4.3

safety

4.7

features

3.7

5 stars

33 %

4 stars

67 %

3 stars

0 %

2 stars

0 %

1 stars

0 %

Pros
The extended digging depth is useful for deeper trenches and utility work.
Cons
The turning radius makes it harder to maneuver in tight site corners.
performance

3.0

comfort

5.0

fuel efficiency

4.0

safety

4.0

features

4.0

Valuation

Last 12 month
1999

Komatsu WB91 similar models

Highlight differences
Komatsu WB91R-2
Komatsu WB156-5
Komatsu WB70A-1
Engine
Alternator supplied amperage 60 Amh
Alternator supplied amperage 95 Amh
Alternator supplied amperage 60 Amh
Aspiration Naturally aspirated
Aspiration Turbocharged
Aspiration -
Gross power 67.71 kw
Gross power 73.83 kw
Gross power -
Net power 61.52 kw
Net power 70.84 kw
Net power 52.8 kw
Number of cylinders 4
Number of cylinders 4
Number of cylinders 4
Power measured @ 2,200 rpm
Power measured @ 2,200 rpm
Power measured @ 2,500 rpm
Torque measured @ 1,500 rpm
Torque measured @ 1,500 rpm
Torque measured @ 1,200 rpm
Years 1999-2006
Years 2006-2013
Years 1996-2004
Market Average AED 220,000
Market Average AED 320,000
Market Average AED 190,000
Price AED 140,000
Price AED 210,000
Price AED 120,000
General
Backhoe digging depth 4.51 m
Backhoe digging depth 4.75 m
Backhoe digging depth 3.69 m
Bucket capacity 1.07 cu m
Bucket capacity 0.99 cu m
Bucket capacity 0.76 cu m
Bucket digging force 3,570.05 kg
Bucket digging force -
Bucket digging force 4,200.04 kg
Bucket width 232 cm
Bucket width 235 cm
Bucket width 185 cm
Displacement 4,413.05 cu cm
Displacement 4,506.45 cu cm
Displacement 3,318.39 cu cm
Engine model 4D106-1FA
Engine model S4D102LE-2
Engine model 4D98E-1FA
Loader dump height 2.77 m
Loader dump height 2.65 m
Loader dump height 2.5 m
Loader dump reach 0.76 m
Loader dump reach 0.76 m
Loader dump reach 0.88 m
Max speed forward 40.07 kph
Max speed forward 37.82 kph
Max speed forward 39.11 kph
Max torque 310.07 Nm
Max torque 413.52 Nm
Max torque 251.09 Nm
Operating voltage 12 V
Operating voltage 12 V
Operating voltage 12 V
Operating weight 8,580 kg
Operating weight 7,498 kg
Operating weight 6,400 kg
Transmission type full powershift, Electronic Gear Management
Transmission type synchronized gearbox, powershift shuttle
Transmission type Hydrostatic
Wheelbase 2.19 m
Wheelbase 2.19 m
Wheelbase 2.16 m
Backhoe dump height -
Backhoe dump height 3.78 m
Backhoe dump height -
Backhoe
Backhoe reach from swivel 5.58 m
Backhoe reach from swivel 6.04 m
Backhoe reach from swivel 4.69 m
Loader
Breakout force 6,080.59 kg
Breakout force 5,998.31 kg
Breakout force 4,397.04 kg
Loader digging depth 11.18 cm
Loader digging depth 13.97 cm
Loader digging depth 11.18 cm
Service refill capacities
Cooling fluid cap 18.17 liter
Cooling fluid cap 14 liter
Cooling fluid cap 15.14 liter
Front axle fluid capacity 8.33 liter
Front axle fluid capacity 7.19 liter
Front axle fluid capacity 4.16 liter
Fuel cap 130.2 liter
Fuel cap 150.26 liter
Fuel cap 70.02 liter
Hydraulic fluid cap 92.35 liter
Hydraulic fluid cap 97.27 liter
Hydraulic fluid cap 65.1 liter
Rear axle fluid capacity 18.55 liter
Rear axle fluid capacity 14.76 liter
Rear axle fluid capacity 5.3 liter
Transmission fluid cap 16.28 liter
Transmission fluid cap 20.44 liter
Transmission fluid cap -
Refill capacities
Engine oil cap 8.71 liter
Engine oil cap 9.08 liter
Engine oil cap 10.22 liter
Operating specifications
Extended backhoe digging depth 5.67 m
Extended backhoe digging depth 5.97 m
Extended backhoe digging depth 4.42 m
Extended backhoe dump height 3.51 m
Extended backhoe dump height 4.45 m
Extended backhoe dump height 3.63 m
Extended backhoe dump reach 6.55 m
Extended backhoe dump reach -
Extended backhoe dump reach 1.55 m
Extended backhoe reach from swivel 6.55 m
Extended backhoe reach from swivel 7.19 m
Extended backhoe reach from swivel 5.33 m
Tires
Front tires size (2WD) 12.5/80 R18- 10 PR
Front tires size (2WD) -
Front tires size (2WD) 12.5 x 20
Rear tires size 16.9 x 28 - 10 PR
Rear tires size -
Rear tires size 12.5 x 20
Dimensions
Ground clearance 0.46 m
Ground clearance 0.46 m
Ground clearance 0.46 m
Height - top of cab 2.77 m
Height - top of cab 2.96 m
Height - top of cab 2.68 m
Overall Length 5.91 m
Overall Length 7.53 m
Overall Length -
Overall Width 2.35 m
Overall Width 2.38 m
Overall Width 1.86 m
Turning radius 5.46 m
Turning radius 3.41 m
Turning radius -
Transmission
Max speed reverse 40.07 kph
Max speed reverse 37.82 kph
Max speed reverse 39.11 kph
Number of forward gears 4
Number of forward gears 4
Number of forward gears 4
Number of reverse gears 4
Number of reverse gears 4
Number of reverse gears 4
Hydraulic system
Pump flow cap 165.03 lpm
Pump flow cap 165.03 lpm
Pump flow cap 116.2 lpm
Pump type Variable flow, axial piston
Pump type Variable flow, axial piston
Pump type Tandem gear
Relief valve pressure 185 bar
Relief valve pressure 244.97 bar
Relief valve pressure 200 bar

Backhoe loaders. For sale.

Similar machines. Other reviews.

Komatsu D275A Crawler dozers specs Komatsu D155A Crawler dozers specs Komatsu HD325 Off-highway trucks specs Komatsu HD405 Off-highway trucks specs Komatsu HD465 Off-highway trucks specs Komatsu PC300 Medium excavators specs Komatsu PC400 Large excavators specs Komatsu PC450 Large excavators specs Komatsu WA470 Wheel loaders specs Komatsu WA500 wheel loaders specs
John Deere 310 Backhoe loaders specs JCB 3DX Backhoe loaders specs Case 770 Backhoe loaders specs Case 851 Backhoe loaders specs Cat 426 Backhoe loaders specs Cat 428 Backhoe loaders specs Massey ferguson 50 Backhoe loaders specs Massey ferguson 60 Backhoe loaders specs Cukurova 88 Backhoe loaders specs John deere 110 Backhoe loaders specs
John Deere 310 Backhoe loaders specs JCB 3DX Backhoe loaders specs John Deere 524 Wheel loaders specs John Deere 544 Wheel loaders specs John Deere 624 Wheel loaders specs John Deere 644 Wheel loaders specs Case 770 Backhoe loaders specs Case 851 Backhoe loaders specs Cat 906 Wheel loaders specs Cat 938 Wheel loaders specs
Get the latest from Makana

Subscribe to receive auction dates, exclusive deals, and news in your inbox.

We care about the protection of your data. Read ourPrivacy Policy

Makana connects quality machinery with the global market, ensuring safe transactions for buyers and sellers.

COMPANYAbout usMachinery auctionsWatch showsNewsDocumentation
Book a demo
HELP AND SUPPORTContact usHow to buyHow to sellFinancingInstallmentsFAQ
LEGALPrivacy PolicyTerms & Conditions
© 2026 Makana. All rights reserved.

build datetime: 6/9/2026, 1:26:42 PM