AIRMAN AX-u-7 Series Mini Excavator Owner’s Manual

AIRMAN AX-u-7 Series Mini Excavator

Specifications:

• Model: AX55u
• Operating Weight Capacity: 5,210kg
• Bucket Capacity: 0.14m3
• Shoes Type: Rubber shoes, Cabin

Product Usage Instructions

Operating Space and Efficiency:

The mini-excavator provides an operating space designed for ease of use and efficiency. The energy-saving systems help in reducing fuel costs, and improved maintainability ensures smooth operations.

Large Working Space:

The mini-excavator features expanded floor leg space and a roomier interior cab space with a larger front windshield for a more spacious working environment. The cab door size has been increased for easier access.

Fuel Efficiency and Engine Performance:

The Stage V-compliant engines offer quick cycle times and an efficient hydraulic system. The engines on different models have specific features like common rail systems, EGR, and muffler  filters for reduced emissions.

Workability and Modes:

The mini-excavator is designed for smooth collecting work with enhanced blade and bucket performance. It offers ECO and PWR mode selection for varying work requirements.

Automatic Functions and Controls:

Features like automatic idling function and idling stop function help in reducing fuel consumption and noise. The hydraulic pilot type control system ensures precise operability with ergonomic positioning of levers.

Multi-Monitor Display:

The high visibility multi-monitor displays important machine status information like fuel level, coolant temperature, and warning lamps. It allows for fast and smooth multi-axis operations with a travel speed selector switch.

FAQ

• Q: How do I select between ECO and PWR modes?
  • A: The mode selection can be easily done on the multi-monitor display by using the engine control dial.
• Q: Can I adjust the engine speed manually?
  • A: Yes, the engine speed can be adjusted to the required level using the engine control dial for optimal performance.

Models

Efficiency & Comfort

An operating space designed for the ultimate ease of use. Energy-saving systems that contribute to reducing fuel costs. Improved maintainability in every detail. By improving operator ease of use as well as providing advanced functions and high performance for digging, loading, leveling, and other work (utility), we have created a new mini excavator that is certain to satisfy customers

High Performance

Large working space

The floor leg space has been expanded. Cab specifications also feature a roomier interior space and larger front windshield, for a larger working space. The opening size of the cab door has also been expanded for easier entry and exit

Fuel efficient powerfull Stage V-compliant engines provide quick cycle times and an efficient hydraulic system

The engines on the AX33U and AX38U-7 do not require any after-treatment device as the rated output is below 19 kW. The “common rail system”engines on the AX48U and AX55U-7 are fitted with an EGR and muffler filter to reduce Nox and particulate matter.

Smooth collecting work

The small gap between the blade and the bucket improves workability for work such as collecting sand and removing asphalt. On the AX48U and AX55U-7 the blade is now extended

ECO mode / PWR mode selection

The mode can be easily selected on the multi-monitor.

•  ECO (economy) mode : Priority is given to fuel economy, for conserving fuel.
• PWR (power) mode :Priority is given to work, for when excavating power and higher work speeds are needed.

The engine speed can be adjusted to the required speed using the engine control dial.

Hydraulic pilot type control system

The pilot levers have been positioned for ergonomic performance, and the levers are highly rated for their precision operability. The use of a hydraulic pilot system for all controls reduces the  required lever operating force.

Fast & smooth multi-axis operations

• The AX33u/38u delivers even greater work efficiency with an improved combination of our popular 3-pump hydraulic system and arm regeneration circuit.
• The AX48u/55u delivers even greater work efficiency with an improved combination of a hydraulic circuit “AHCS” and arm regeneration circuit.

Travel speed selector switch

A pushbutton travel speed selector switch is installed on the blade lever. It allows smooth changes in travel speed while operating the blade.

Automatic idling function

When the operating lever is left in the neutral position for 4 seconds, the engine automatically switches to the idling speed to help reduce fuel consumption and noise.

Automatic idling stop function (optional)

This energy-saving system automatically stops the engine when it has been idling continuously for a long period of time. The time before the engine stops can be selected (3 minutes, 5 minutes, 10 minutes,  or 15 minutes).

High visibility multi-monitor

A display that communicates the fuel level, coolant temperature, warning lamps, and other machine status information to the operator is installed  at the front right.

Display items

• Coolant temperature gauge
• Fuel gauge
• Hour meter
• Clock
• Travel mode indicator
• Work light indicator
• Engine indicators
• Overheat indicator
• Engine oil pressure indicator
• Charge indicator
• Fuel level indicator

Automatic speed change system for high-speed travel

When the machine encounters a slope or other high load during high-speed travel, it automatically shifts to low speed, then restores high speed when the load decreases

Comfortability

Comfortable Operation

A large operator space in bright new colors has been created for operator relaxation and comfort.

On this specific picture the AX55U-7 full spec machine is visible, equipped with Airco and auxiliary function levers (proportional) to control the attachments.

On the AX48U and AX55U-7 the EGR & Muffler Filter system Failure Indicators and the manual regeneration switch are situated next to the monitor

Good all around visibility

Vibration-damping floor mounting structure

Larger vibration-damping rubber is used in the floor mounts to provide a large improvement in operator comfort.

Safety

Dependable Safety

The design gives top priority to safety, including ROPS/OPG capabilities and operator lever locks

ROPS OPG 4-pole canopy and cabin

This structure protects the operator wearing a seat belt in the event that the machine rolls over. The structure conforms to the ROPS (Roll-Over Protective Structure) safety standard. The cab also satisfies the OPG top guard safety standard (standard for operator protective structures) to protect operators from falling objects

Secure locks for all operating levers

The use of hydraulic pilot type operating levers allows all levers to be securely locked. A neutral engine start mechanism permits engine start only when the lock lever is locked

Foot step for easy entry and exit

A foot step provides a lower entry position. The low step makes it easier to enter and exit the vehicle

Easy Maintenance

Wide opening cover

With a wide radiator side cover that can be easily opened with a latch, as well as our popular sliding-type engine cover that improves maintenance convenience in small spaces, the daily maintenance is easier than ever

Battery disconnect switch

The battery disconnect switch allows maintenance to be done in a save way

Parallel radiator and oil cooler layout

The radiator and oil cooler layout has been changed from a series layout to a parallel layout, improving both cleaning convenience and cooling performance.

Anti-clogging radiator and oil cooler

The corrosion-resistant aluminum radiator and oil cooler utilize a wavy fin structure. This structure reduces cooling fan clogging and allows easy cleaning.

Self-lubricating bushing

Our proven self-lubricating bushing is used in the front pin joint. Grease supply interval: Dailly

Split-type floor mat

A split-type floor mat is used, allowing the floor part to be separately removed and cleaned. The pattern shapes have also been improved to make sweeping out the cab easier.

Mud splash-resistant truck frame

The undercarriage resists mud packing and allows any accumulated mud to be easily removed. This allows post-work cleaning to be completed much faster

• Maintenance-free turning speed reducer (type lubricated by hydraulic oil)
• Grease bath-type turning gear Grease supply interval: Every 500 hours
• Hydraulic oil change Oil change interval: Every 2,000 hours

Tiltable cabin

Tiltable cabine allows easy access to the machines main components

Integrated swing post pin

A large integrated pin for the swing post is used, reducing the occurrence of looseness

D-shape frame to protect the body from impact

A frame with a D-shape cross-section and improved vertical rigidity protects the operator’s body in the event of an impact.

Durable flat-bottom bucket

Standard equipment with the AXu series includes a flat-bottom bucket that resists wear to the welds of the bucket bottom plate

Durability

Reinforced V-shaped boom cylinder guard

The V-shaped guard has been reinforced to prevent damage to the boom cylinder. Two mounting bolts are used to improve strength and prevent looseness.

Tough blade

A box-section structure is used for the stays to provide greater overall blade reliability. Openings in the stays improve the flow of dirt.

High durability rubber shoes

Rubber shoes with a steel core shape provide superior durability

SPECIFICATIONS

AX33u/38u-7

ENGINE

• Model……………………………………………………………. Yanmar 3TNV88
• Type………………………………….. 4-cycle water-cooled, direct injection
• No. of cylinders…………………………………………………………………….. 3
• Rated power
  • ISO 14396, net ……………………………. 18.8 kW at 2,400 min-1 (rpm)
  • ISO 9249, net ……………………………… 18.8 kW at 2,400 min-1 (rpm)
  • SAE J1349, net …………………………… 18.8 kW at 2,400 min-1 (rpm)
• Maximum torque……………………………. 91.6 Nm at 1,000 min-1 (rpm)
• Piston displacement …………………………………………………….. 1.642 L
• Bore and stroke ………………………………………………. 80 mm x 90 mm
• Battery…………………………………………………………… 1 x 12 V / 55 Ah

HYDRAULIC SYSTEM

• Main pumps……………… 2 variable displacement axial piston pumps
• …………………………………………………………. 1 gear pump
• Maximum oil flow……………………………………………… 2 x 38.4 L/min
  • ………………………………………………. 1 x 22.8 L/min
• Pilot pump ………………………………………………………….. 1 gear pump
• Maximum oil flow…………………………………………………… 10.8 L/min

Hydraulic Motors

• Travel…………………….. 2 variable displacement axial piston motors
• Swing……………………………………………………… 1 axial piston motor

Relief Valve Settings

• Implement circuit ………………………………… 24.5 MPa (250 kgf/cm2)
• Swing circuit ………………………………………. 16.7 MPa (170 kgf/cm2)
• Travel circuit ………………………………………. 24.5 MPa (250 kgf/cm2)
• Pilot circuit …………………………………………….. 3.9 MPa (40 kgf/cm2)

Hydraulic Cylinders

Figures between (…) are the data on the AX38U-7.

SERVICE REFIL CAPACITIES

• Fuel tank………………………………………………………………………. 42.0 L
• Engine coolant………………………………………………………………… 3.9 L
• Engine oil……………………………………………………………………….. 7.2 L
• Travel device (each side) …………………………………………………. 0.6 L
• Hydraulic system…………………………………………………………… 56.0 L
• Hydraulic oil tank …………………………………………………………… 32.0 L

UPPER STRUCTURE

Revolving Frame

D-section frame for resistance to deformation

Swing Device

Axial piston motor with planetary reduction gear is lubricated by hydraulic oil. Swing circle is single-low. Swing parking brake is spring-set/hydraulic- released disc type.

• Swing speed……………………………………………………… 9.1 min-1 (rpm)
• Swing torque …………………………………………… 5.1 kN·m (558 kgf·m)

Operator’s Cab

Independent spacious cabin, 1,049 mm wide by 1,611 mm high, conforming to ISO* Standards. Reinforced glass windows on 4 sides for visibility. Front windows (upper and lower) can be opened. Reclining seat.

International Standardization Organization

UNDERCARRIAGE

Tracks

Tractor-type undercarriage. Weldedtrack frame using selected materials. Side frame welded to track frame.

Numbers of Rollers and Shoes on Each Side

• Upper rollers………………………………………………………………………. 1
• Lower rollers………………………………………………………………………. 4

Travel Device

Each track driven by 2-speed axial piston motor. Parking brake is spring-set /hydraulic-released disc type.

• Automatic transmission system………………………………….. High-Low
• Travel speeds ………………………………………….. High : 0 to 4.3 km/h
  • ……………………………………………… Low : 0 to 2.8 km/h
• Maximum traction force ………………………………… 27 kN (2,750 kgf)
• Gradeability ………………………………… 58% (30-degree) continuous

WEIGHTS AND GROUND PRESSURE

AX33u-7 equipped with 2.28 m boom, 1.52 m arm and 0.08m 3 bucket (ISO heaped). AX38u-7 equipped with 2.47m boom, 1.72 m arm and 0.10 m3 bucket (ISO heaped).

• AX33u-7: including 0.08 m 3 (ISO heaped) bucket weight (67 kg) ,additional counterweight (190 kg).
• AX38u-7: including 0.10 m 3 (ISO heaped) bucket weight (76 kg),additional counterweight (230 kg).

FRONT ATTACHMENTS

BACKHOE BUCKETS

ISO 7451

capacity

| Width|

No. of teeth

|

Weight

| Front Attachment|
---|---|---|---|---|---
AX33u-7 arm| AX38u-7 arm|
Without side cutters| With side cutters|
1.17m| 1.52m| 1.32m| 1.72m|
0.08 m3| 400 mm| 450 mm| 3| 67 kg| A| A| A| A|
0.09 m3| 450 mm| 500 mm| 4| 73 kg| A| A| A| A|
0.10 m3| 500 mm| 550 mm| 4| 76 kg| A| B| A| A|
0.11 m3| 550 mm| 600 mm| 4| 80 kg| B| C| A| B|
Arm crowd force| 16.9 kN| 14.6 kN| 19.0 kN| 16.9 kN|
Bucket digging force| 27.2 kN| 27.1 kN|

• A: General digging
• B: Light-duty digging
• C: Loading

LIFTING CAPACITIES

Notes:

1. Ratings are based on ISO 10567.
2. The lifting capacity of the AX series does not exceed 75% of the tipping load with the machine on rm, level ground or 87% full hydraulic capacity.
3. The load point is a hook (not standard equipment) located on the back of the bucket.
4. *Indicates load limited by hydraulic capacity.
5. 0 m = Ground.

• A: Load radius
• B: Load point height
• C: Lifting capacity

AX48u/55u-7

ENGINE

• Model……………………………………………………………. Yanmar 4TNV88
• Type………………………………….. 4-cycle water-cooled, direct injection
• No. of cylinders…………………………………………………………………….. 4
• Aspiration…………………………………………………………….. Cooled EGR
• Aftertreatment………………………………………………………. Muffler Filter

Rated power

• ISO 14396, net ……………………………. 29,1 kW at 2,400 min -1 (rpm)
• ISO 9249 / SAE J1349, net………………27,1 kW at 2,400 min -1 (rpm)
• Maximum torque……………………………135.8 Nm at 1,560 min -1 (rpm)
• Piston displacement …………………………………………………….. 2.189 L
• Bore and stroke ………………………………………………. 88 mm x 90 mm
• Battery…………………………………………………………… 1 x 12 V / 72 Ah

HYDRAULIC SYSTEM

Hydraulic Pumps

• Main pumps……………….. 1 variable displacement axial piston pump
• Maximum oil flow………………………………………………. 1 x 120 L/min
• Pilot pump ………………………………………………………….. 1 gera pump
• Maximum oil flow…………………………………………………… 12.0 L/min
• Hydraulic Motors
• Travel…………………….. 2 variable displacement axial piston motors
• Swing……………………………………………………… 1 axial piston motor

Relief Valve Settings

• Implement circuit ………………………………… 24.5 MPa (250 kgf/cm2)
• Swing circuit ………………………………………. 18.3 MPa (187 kgf/cm2)
• Travel circuit ………………………………………. 24.5 MPa (250 kgf/cm2)
• Pilot circuit ………………………………………….. 5.9 MPa (60.2 kgf/cm2)

Hydraulic Cylinders

Figures between (…) are the data on the AX55U-7.

SERVICE REFILL CAPACITIES

• Fuel tank………………………………………………………………………. 70.0 L
• Engine coolant………………………………………………………………… 4.7 L
• Engine oil……………………………………………………………………….. 8.6 L
• Travel device (each side) …………………………………………………. 0.9 L
• Hydraulic system…………………………………………………………… 66.0 L
• Hydraulic oil tank …………………………………………………………… 42.0 L

FRONT ATTACHMENTS

BACKHOE BUCKETS

ISO 7451

capacity

| Width|

No. of teeth

|

Weight

| Front Attachment|
---|---|---|---|---|---
AX48u-7 arm| AX55u-7 arm|
Without side cutters| With side cutters|
1.38 m| 1.69 m| 1.38 m| 1.69 m|
0.11 m3| 450 mm| 500 mm| 3| 96 kg| A| A| A| A|
0.13 m3| 500 mm| 550 mm| 4| 104 kg| A| B| A| A|
0.14 m3| 550 mm| 600 mm| 4| 109 kg| A| C| A| A|
0.16 m3| 600 mm| 650 mm| 4| 113 kg| C| C| A| B|
Arm crowd force| 24.0 kN| 21.0 kN| 24.0 kN| 21.0 kN|
Bucket digging force| 32.1 kN| 36.8 kN| 36.9 kN|

• A: General digging
• B: Light-duty digging
• C: Loading

LIFTING CAPACITIES

Notes

1. Ratings are based on ISO 10567.
2. The lifting capacity of the AX series does not exceed 75% of the tipping load with the machine on rm, level ground or 87% full hydraulic capacity.
3. The load point is a hook (not standard equipment) located on the back of the bucket.
4. *Indicates load limited by hydraulic capacity.
5. 0 m = Ground.

• A: Load radius
• B: Load point height
• C: Lifting capacity

DIMENSIONS & WORKING RANGES

DIMENSIONS & WORKING RANGES

Item                                               Model| AX 33 u – 7| AX 38 u – 7| AX 48 u – 7| AX 55 u – 7
---|---|---|---|---
Shoe type| Rubber shoe
Roof type| Canopy| Cabin| Canopy| Cabin| Canopy| Cabin| Canopy| Cabin
DIMENSIONS| A: Max. Transport length| mm| 4,530 (4,450)| 4,760 (4,640)| 5,390 (5,350)| 5,520 (5,470)
B: Undercarriage width| mm| 1,550| 1,740| 1,960| 2,000
C: Overall height| mm| 2,480| 2,480| 2,530| 2,530
D: Upperstructure width| mm| 1,550| 1,550| 1,850| 1,850
E: Undercarriage lenght| mm| 2,110| 2,110| 2,500| 2,500
F: Sprocket center to idler center| mm| 1,660| 1,660| 2,000| 2,000
G: Distance between undercarriage cent| mm| 1,250| 1,440| 1,560| 1,600
H: Track shoe width| mm| 300| 300| 400| 400
I: Min. Ground clearance| mm| 280| 280| 340| 340
J: Parallel blade distance| mm| 1,620| 1,620| 1,820| 1,820
K: Blade height| mm| 360| 360| 375| 375
L: Blade width| mm| 1,550| 1,740| 1,960| 2,000
M: Counterweight clearance| mm| 550| 550| 610| 610
N: Rear edge length| mm| 875| 980| 1,080| 1,100
O: Rear edge swing radius| mm| 875| 980| 1,080| 1,100
WORKING RANGES| a: Max. digging reach| mm| 5,170 (4,890)| 5,520 (5,210)| 6,060 (5,760)| 6,260 (5,960)
b: Max. digging reach at ground| mm| 5,040 (4,750)| 5,410 (5,080)| 5,920 (5,610)| 6,130 (5,820)
c: Max. digging depth| mm| 3,130 (2,790)| 3,460 (3,060)| 3,630 (3,320)| 3,830 (3,530)
d: Max. vertical wall| mm| 2,530 (2,330)| 2,780 (2,580)| 2,880 (2,550)| 3,140 (2,810)
e: Max. cutting height| mm| 4,700 (4,620)| 4,470 (4,420)| 4,950 (4,870)| 4,740 (4,700)| 5,820 (5,590)| 6,000 (5,750)
f: Max. dumping height| mm| 3,310 (3,200)| 3,100 (3,030)| 3,570 (3,460)| 3,390 (3,310)| 4,140 (3,910)| 4,310 (4,070)
g: Min. swing radius| mm| 2,090 (1,970)| 2,180 (2,150)| 2,190 (2,080)| 2,300 (2,240)| 2,370 (2,240)| 2,300 (2,210)
h: Max. boom swing radius| mm| 1,680 (1,580)| 1,860 (1,820)| 1,770 (1,670)| 1,970 (1,910)| 1,860 (1,750)| 1,810 (1,730)
i: Blade bottom highest position| mm| 360| 360| 460| 460
j: Blade bottom lowest position| mm| 320| 400| 365| 365
k: Front height at min. swing radius| mm| 3,560 (3,530)| 3,460 (3,440)| 3,760 (3,720)| 3,680 (3,640)| 4,250| 4,380
l/m: Offset distance| mm| 610/735| 610/700| 610/735| 610/700| 690/850| 690/850
Max. Boom-swing angle| deg.| 72/62| 62/62| 72/62| 62/62| 80/60| 80/60

EQUIPMENT

Standard and optional equipment may vary by country, so please consult your AIRMAN dealer for details.

STANDARD EQUIPMENT

ENGINE

• Auto idle system
• Cartridge-type engine oil filter
• Electrical fuel feed pump
• Fuel main filter
• Radiator reserve tank
• Water-separateor for engine fuel

HYDRAULIC SYSTEM

• Boom anti-drift valve
• Fuell-flow filter
• Hydraulic pilot type control levers
• Pilot control shut-off lever
• with neutral engine start system
• Pilot filter
• Suction filter
• Swing parking brake
• Travel parking brake
• Two-speed travel system
• Valve for extra piping

CABIN

• Air conditioner
• AM/FM radio
• Anti-slip plate
• Armrests
• Defroster
• Drink holder
• Electric horn
• Floor mat
• Reclining seat
• Retractable seat belt
• ROPS/OPG cab
• Spare power supply
• Suspension seat
• Window washer
• Wiper

FRONT ATTACHMENTS

• HN bushing
• Extra piping
• 1.52 m long arm (AX33U-7)
• 1.72 m long arm (AX38U-7)
• 1.69 m long arm (AX48 to AX55U-7)

4-POLE CANOPY

• Anti-slip plate
• Armrests
• Drink holder
• Electric horn
• Floor mat
• Reclining seat
• Retractable seat belt
• ROPSD/OPG canopy
• Spare power supply
• Suspension seat

UPPER STRUCTURE

• Rearview mirror
• Toolbox (AX48 to AX55U-7)
• 190 kg additional counterweight (AX33U-7)
• 230 kg additional counterweight (AX38U-7)
• 200 kg additional counterweight (AX48 to AX55U-7)
• Auxilliary overload relief valve (ORV)

UNDERCARRIAGE

• 300 mm rubber shoe  (AX33 to AX38U-7)
• 400 mm rubber shoe (AX48 to AX55U-7)

OPTIONAL EQUIPMENT

ENGINE

• Dust-Proof indoor net

HYDRAULIC SYSTEM

• Hose rupture valve (HRV)

CABIN

• Auxiliary function lever (AFL)
• Heater

4-POLE CANOPY

• Auxiliary function lever (AFL)

FRONT ATTACHMENTS

• Assist piping
• 1.17 m STD arm (AX33U-7)
• 1.32 m STD arm (AX38U-7)
• 1.38 m STD arm(AX48 to AX55U-7)

UPPER STRUCTURE

• Auxiliary overload relief
• valve (ORV)
• Pilot accumulator
• Stack muffler

UNDERCARRIAGE

• 300 mm grouser shoe (AX33 to AX38U-7)
• 300 mm pad crawler shoe (AX33 to AX38U-7)
• 400 mm grouser shoe (AX48 to AX55U-7)
• 400 mm pad crawler shoe (AX48 to AX55U-7)

MISCELLANEOUS

• Theft-deterrent system*

The Airman family from 1.100 kg to 5.500 kg

SAFETY

Operate safely in accordance with the proper operation manual. To prevent trouble and accidents, make sure to perform daily and preventive maintenance checks

Contact

HOKUETSU INDUSTRIES EUROPE B.V.

• Aalsmeerderdijk 156 unit J,1438 AX, OUDE MEER, The Netherlands
• Tel : +31-(0)20-646-2636
• Fax : +31-(0)20-646-2191
• e-mail: info@hokuetsu.nl
• URL : http://www.hokuetsu.eu
• https://tractormanualz.com/

References

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