Hawk AT300-V2 Instruction Manual

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AT300-V2 / AT300PS-V2
AMPHIBIOUS EXCAVATOR
OPERATION, INSTALLATION, AND
MAINTENANCE MANUAL
CERT NO: TUV100 01 2043
ISO 9001: 2015

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FOREWORD
The Amphibious Hydraulic Excavator AT300-V2/AT300PS-V2 with two
pontoons is a type of fully multi-purpose hydraulic excavator developed
and manufactured by HAWK Excavators. It is designed for use on soft
ground, marshland, as well as in shallow water.
This manual will help users understand the structure, features, and
functions of this machine in a thorough and systematic way, to facilitate
operation and maintenance.
The correct way of operation, as well as proper and timely maintenance,
can fully develop the best performance of this machine, improving its
working efficiency and extending its life. This manual explains the
essentials of the operation, maintenance methods, and troubleshooting.
Operators and technical personnel should read the manual before using
this machine and follow its requirements. This manual is a supplementary
part of the AT300-V2/AT300PSV2 amphibious excavator operation and
maintenance manual.

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TABLE OF CONTENTS
NO. DESCRIPTION PAGE
1.0 MAIN SPECIFICATIONS 5
1.1 MAIN PERFORMANCE PARAMETERS 5
1.2 OPERATING CONDITIONS 6
1.2.1 ALLOWABLE CONDITIONS 6
1.2.2 NON-ALLOWED CONDITIONS 6
2.0 STRUCTURE 6
2.1 PARKING BRAKE 7
3.0 OPERATION 7
3.1 PRECAUTIONS BEFORE USING A NEW MACHINE 7
3.1.1 INSPECT THE FOLLOWING ITEMS BEFORE OPERATING 7
3.2 OPERATING THE MACHINE 8
3.2.1 PRECAUTIONS 8
3.2.2 TRAVELING ON LAND 8
3.2.3 TRAVELING ON MARSHLAND 8
3.2.4 TRAVELING ON WATER 8
3.2.5 ENTERING THE WATER 9
3.2.6 AVOID EXCAVATION WORK WHILE FLOATING 10
3.2.7 LANDING 11
3.2.8 TRAVELING ON WATER AND UNDER A BRIDGE 11
3.2.9 SPUD WORKING PROCEDURE (HORIZONTAL 12
TO VERTICAL POSITION)
3.2.10 SPUD POSITION DURING TRAVELING (HORIZONTAL 14
POSITION)

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4.0 MAINTENANCE 14
4.1 GENERAL SAFETY PRECAUTIONS 15
5.0 INSPECTION, MAINTENANCE INTERVALS AND ITEMS 15
5.1 PERIODIC MAINTENANCE 15
5.2 REQUIREMENTS FOR PERFORMING INSPECTION AND MAINTENANCE 15
5.3 INSPECTION AND MAINTENANCE (BEFORE OPERATING MACHINE) 16
5.4 OTHER MAINTENANCE 17
5.4.1 TRAVEL DEVICE 17
5.4.2 TIGHTENING OF THE SLEWING FRAME MOUNTING BOLT 18
5.4.3 ADJUSTING TRACK TENSION AND GREASING TRACK CHAINS 19
5.4.4 WEAR PLATES 19
6.0 INSTALLATION AND TRANSPORTATION 20
6.1 TRANSPORTATION 20
6.2 ASSEMBLING THE MACHINE 20
6.3 ASSEMBLING THE SIDE PONTOONS 25
6.4 DISASSEMBLING THE MACHINE 26

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1.0MAIN SPECIFICATIONS
1.1 MAIN PERFORMANCE PARAMETERS
No
ITEM
UNIT
SPECIFICATION
REMARKS
1
MAIN
MODEL
AT300-V2/AT300PS-
V2
TRAVEL MOTOR
QUANTITY: 4
MOTOR/SET
HIGH QUALITY
HYDRAULIC MOTOR
ORIGIN: KOREA
2
SPUD POLE
MOTOR
QUANTITY: 2
MOTOR/SET
HIGH QUALITY
HYDRAULIC MOTOR
ORIGIN: KOREA
3
TRAVEL SPEED
GROUND
km/h
(mph)
0-3.2 (0-1.9)
MARSHLAND
km/h
(mph)
0-2 (0-1.2)
IN STILL WATER
km/h
(mph)
0-1.75 (0-1.08)
4
GRADEABILITY
30°
5
PONTOON VOLUME CAPACITY
m3(gal)
60 (15,850)
6
ADDITIONAL PONTOON VOLUME
CAPACITY
m3(gal)
10.8 (2,853.05)
7
GROUND
PRESSURE
WITH LONG
REACH ARM
MPa
(psi)
0.015 (2.17)
8
SPUD POLE
MOVEMENT
SPEED
mm/s
(ft./sec)
150 (0.492)

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1.2 OPERATING CONDITIONS
The hydraulic amphibious excavator AT300-V2/AT300PS-V2 is strongly recommended for
working on wet ground, marshland, and shallow water. To avoid overturning and damage, the
amphibious excavator must be operated strictly in accordance with the following allowable
conditions:
1.2.1 ALLOWABLE CONDITIONS
1. Work on wet ground, marshland, and shallow water.
2. The machine can travel and work in water not deeper than 2 meters, and work normally
under the following conditions:
a) The water flow speed: is 24 m/min (1.31 feet/second) or less.
b) The wave height: is 0.1m (3.93 in) or less.
c) The wind speed: is 240 m/min (8.94 mph) or less.
1.2.2 NON-ALLOWED CONDITIONS
1. Do not operate the machine on stumps, hard stones, or uneven ground that is frozen
and solid, when mounted with additional pontoons.
2. Do not attempt to operate the excavator when completely floating in water.
3. Do not travel over water of an unknown depth.
4. Do not use a bucket larger than the designated one. Otherwise, it will affect the stability
of the machine. The machine is only used for light loads and shouldn't be used for heavy
loads.
2.0 STRUCTURE
The AT300-V2/AT300PS-V2 hydraulic amphibious excavator has four traveling devices (two
traveling motors per amphibious undercarriage). Figure 2.0 shows a simple drawing of the
structure of the machine.
Side Pontoon
Drive
Shafts
Spud
Crossbeams
Slewing
Frame
Pontoons
Track Shoes
and Chains

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Figure 2.0: Amphibious Undercarriage Structure
2.1 PARKING BRAKE
The machine normally comes with a closed-type brake, which is an automatic brake device
using spring force when the excavator is parked on a slope.
When the machine is working, the brake valve on the travel motor will automatically be
released each time the travel foot pedal is activated to move forward or backward.
3.0 OPERATION
The operator must read the machine manufacturer’s operation manual, and all warning and
control labels before attempting to operate the machine.
3.1 PRECAUTIONS BEFORE USING A NEW MACHINE
The service life of an excavator is largely dependent on the load condition of its initial use.
The operator should increase the load according to the following instructions before using a
new machine. The operator can set the load time by working hours on display, according to
the lubrication chart and maintenance instructions.
Overloading will cause scratches on the hydraulic motors, and during test runs it will affect the
service life of the machine.
During the Test:
WORKING TIME
LOAD
First 50 hours
80% of the load (74% of the diesel engine rated rpm)
After 50 hours
Full Load
3.1.1 INSPECT THE FOLLOWING ITEMS BEFORE OPERATING
1. Check for any parts that were broken, missing, or loosened during transportation.
2. Check the track chain tension.
3. Make sure that there are no oil or hydraulic oil leaks in any part of the machine.
4. Use the recommended oil and grease.
5. Make sure there are no defects in the hydraulic hoses and hydraulic lines.
6. Close the manual valve when performing maintenance procedures. Special attention
should be paid during the opening of the manual valve before starting the engine after
maintenance.
7. Make sure that the spud poles are in their original position when traveling.

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3.2 OPERATING THE MACHINE
3.2.1 PRECAUTIONS
1. Thoroughly checkthe pontoons forcracks and leaks before traveling on marshland
or water. If any defects are found, stop using the machine immediately. Proceed with
the inspection, and repair the defects accordingly.
2. The chain must be correctly tensioned during operation, because if the machine
takes a turn on marshland and its chain is too loose, misalignment may occur.
Conversely, if the chain is too tight, it may result in increased resistance.
3. Apply used oil to frequently lubricate the track chain, especially after long-distance
travel on water or land. This can help to extend the life of the track chain and promote
better travel performance.
3.2.2 TRAVELING ON LAND
1. Clear the road using the bucket. This is to minimize damage to the track plates and track
chains.
2. Do not travel on stumps or uneven ground.
3.2.3 TRAVELING ON MARSHLAND
1. The machine may not move efficiently when traveling on poor quality marshland, such
as soft or muddy ground. Therefore, in this case, working attachments are required.
3.2.4 TRAVELING ON WATER
1. When traveling on water, the operator must adjust the working attachments to ensure
the stability of the amphibious excavator. Refer to Figure 3.0.
Figure 3.0: Traveling over water
2. When the machine is floating, do not perform any digging operations.

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3. When traveling on water, the requirements for water speed, wave height, and wind speed
are as follows:
a) The water speed should be less than 24 m/min (1.31 feet/second).
b) The wave height should be less than 0.1 m (3.93 in).
c) The wind speed should be less than 240 m/min (8.94 mph).
4. Do not travel in bad weather conditions. Refer to Figure 3.1.
Fig 3-1: Avoid Traveling in Bad Whether
3.2.5 ENTERING THE WATER
1. Check the water depth before launching the machine. Do not directly launch the machine
into the water as it may overturn.
2. When entering the water, the recommended launching site should be a ramp with a less
than 30-degree slope, to prevent the machine from tipping over.
Note: The launching slope should go as far as a water depth of not more than 2 meters.
Refer to Figure 3.2.
3. If the slope is hard ground, the maximum permissible angle will be 15 degrees.
4. If the above conditions are not met, the bucket may be used to create a path into the
water.
LESS
THAN 30°

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Figure 3.2: Launching the Amphibious Excavator
5. Avoid parking the amphibious excavator in the water. Refer to Figure 3.3.
Figure 3.3: Avoid parking in the water
3.2.6 AVOID EXCAVATION WORK WHILE FLOATING
The amphibious excavator is designed to work on soft ground. Therefore, avoid letting it float
in water while working. Performing the digging operation while floating will cause tipping over.
Without extra side pontoons and spud poles, in-water excavation is only allowed at a 2-meter
depth. Refer to Figure 3.4.
Figure 3.4: Avoid working while floating

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3.2.7 LANDING
1. Methods similar to those applied when entering the water also apply when exiting the
water and returning to land.
2. Choose a suitable hard slope and position to exit.
3. Be sure to move to an upright position when landing.
4. The boom and arm should be in the forward position as shown in Figure 3.5.
.
Figure 3.5: Landing the amphibious excavator
3.2.8 TRAVELING ON WATER AND UNDER A BRIDGE
The machine can travel under a bridge. A proper setting should be applied to ensure safe
passage through.
a) Adjust the level of the working attachments.
b) Calculate the height of the working attachments that can pass under the bridge.
c) Make sure the machine is in stable condition.
d) Safety measures and precautions should be applied during the process.
LESS
THAN 30°

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3.2.9 SPUDS WORKING PROCEDURE (HORIZONTAL TO VERTICAL POSITION)
1) Open the 3/4” three-way valves ‘A’ and ‘B’, located at the rear of the slewing frame to
activate the spud system. Refer to Figure 3.6.
.
Figure 3.6: Spud ball valve position on the rear slewing frame
2) Two pieces of 1/2” three-way ball valves at the top, been placed on the top of the side
pontoons to activate the spud hydraulic cylinder or spud drive motor. Extend the spud
cylinder by switching the ball valves. By using the machine’s traveling lever inside the
cabin, control the spud and adjust it to the standing position. Refer to Figure 3.7.
Note: The traveling lever is the mechanism used to control the position of the spud,
either horizontally or vertically, and also to raise the spud up or down.
.
Valves ‘A’ and ‘B’

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Figure 3.7: Position of the three-way ball valves to control the spud
3. Two-way ball valves are used to control the flow of hydraulic fluid:
a) To the spud cylinder for extending or retracting actions.
b) To the motor to raise the spud up and down.
4. These valves must be manually adjusted by the amphibious excavator operator.
5. Once the spuds have been moved from the horizontal to the vertical position for
operation, lock the spud chambers with the locking pin. Refer to Figure 3.9.
Note: Make sure the vertical spuds are locked at all times during operation.
Three way ball valve
‘C’and ‘D’
Figure 3.8:
Spud
position
in
standing
Spud Chamber

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Figure 3.9: Spud locking pin
3.2.10 SPUD POSITION DURING TRAVELING (HORIZONTAL POSITION)
1. Pull out the spud’s locking pin.
2. Slowly control the travel lever to raise the spud until it reaches the limit plate. Refer to
Figure 3.10.
3. Start traveling.
4.0 MAINTENANCE
Proper and timely scheduled inspections and maintenance are important factors in extending
the life of the machine. Especially when it’s working in harsh conditions.
Lock the Spud
Figure
3.10:
Spuds
position
during
traveling

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4.1 GENERAL SAFETY PRECAUTIONS
1. Inspection and maintenance can be performed by parking the machine on a solid, level
surface.
2. Make sure the inspection and maintenance are carried out in good weather conditions.
3. The inspection and maintenance of hydraulic components should be carried out where
there is less dust.
4. Avoid performing any inspection or maintenance while the engine is running. Always stop
the engine and leave it without any load.
5. Before performing any inspection and maintenance on the machine, place the
“INSPECTION / MAINTENANCE IN PROGRESS" sign, in a place that is visible to others.
6. Never disassemble or adjust the reversing valves, motor, or other hydraulic components.
If a problem is detected, contact the manufacturer.
7. Use quality products when replacing parts, especially hydraulic components.
8. Bolts and piping are special items with high strength, that cannot be replaced by general
ones. Bolts and hydraulic components are tightened under considerable force and
require frequent inspection and tightening.
9. Avoid any scratches on the mating face of hydraulic components.
10. Pipes, hoses, oil tanks and others, must be cleaned before installation.
11. Never use an O-ring with any scratches. Make sure during assembly that the O-ring is in
good condition.
12. Hoses should not be twisted during installation.
13. Operate in accordance with maintenance requirements and precautions.
5.0 INSPECTION, MAINTENANCE INTERVALS AND ITEMS
5.1 PERIODIC MAINTENANCE
To detect and repair minor defects in a timely manner, and to prevent serious malfunctions,
periodic maintenance is recommended. This will increase the service life of the machine.
Daily Inspection
Routine inspection and maintenance every day, before and after day
shift operation.
Monthly
Inspection
Every month
Replacement of
filter, hydraulic
oil and
lubrication
Replace in accordance with replacement intervals when performing
any daily and monthly inspection and maintenance procedures.
5.2 REQUIREMENTS FOR PERFORMING INSPECTION AND MAINTENANCE
1. Park the machine on a level surface and lower the bucket to the ground. Remove the
ignition key from the switch and lock the cabin door. Refer to Figure 5.0.

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Figure 5.0: Amphibious excavator position for maintenance
2. Before performing any inspection or maintenance on the machine, place an
“INSPECTION / MAINTENANCE IN PROGRESS" sign in a place visible to others, to
avoid unwanted incidents. Refer to Figure 5.1.
Figure 5.1: Sign during inspection and maintenance
5.3 INSPECTION AND MAINTENANCE (BEFORE OPERATING MACHINE)
Suggested period for inspection and maintenance activity:
Inspection and maintenance activities
Period
Connection and operation of all hydraulic hoses
a) Daily
Greasing
a) Daily

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Loosened or falling out bolts, nuts, and gaskets.
a) Daily
Tension track chain and check for abrasion or
damage to the track shoes.
a)
b)
Monthly
Do if necessary
Lubricate the chain
a)
b)
Long time parking: weekly
Working: monthly
Tightening the locking screw of the slewing frame
a)
b)
Monthly
Do if necessary
Condition of the amphibious undercarriage body and
its parts
a)
b)
Daily
Do if necessary
Oil change of the drive shaft gearbox
a) 3 months / 1000 hours
5.4 OTHER MAINTENANCE
5.4.1 TRAVEL DEVICE
Figure 5.2 shows the oil inlet and outlet of the travel devices. Place the machine on level
ground, and fill the oil inlet until the oil comes out of the level plug.
Fig 5-2: Oil inlet and outlet
Each drive shaft comes with a travel device. The compartments of each travel device (housing)
are filled with 4 liters of grade 90 gearbox oil, to prevent internal rust. Refer to Figure 5.3.
Drain
Level
Fill

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Figure 5.3: Checking the oil level
To check the oil level, park the machine on level ground. Rotate the travel motors until the oil
level checkpoint is approximately horizontal to an imaginary line as per figure 5.3.
IMPORTANT: The oil level checkpoint must behigher than the horizontal oil level before
removing the plug. To refill the gearbox oil, park the machine on level ground. Open
the inlet and outlet plugs. Refill the oil until it reaches the horizontal oil level and a little
comes out of the outlet plug. Then close the plugs again and tighten them properly.
5.4.2 TIGHTENING OF THE SLEWING FRAME MOUNTING BOLT
Perform a proper check of all the front and rear slewing frame mounting bolts. After a few hours
of operation, there is the possibility that the bolts may loosen. As shown in Figure 5.4, the
slewing framemountingbolts must beretightened back if they have loosened, using thecorrect
size spanner to prevent the bolt from breaking.
Figure 5.4: Slewing frame mounting bolts
Outlet
Horizontal Oil
Level
Inlet
Oil level check
point
Slewing Frame Mounting
bolts

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5.4.3 ADJUSTING THE TRACK TENSION AND GREASING THE TRACK CHAINS
To tension the track, first loosen the hex nut-A and then loosen the hex nut-B as shown in
Figure 5.5. Unscrew the adjusting bolts (M36) to increase the tension of the track chains. Make
sure that the tensions of both amphibious undercarriages are the same. Once tensioning is
complete, all these must be retightened. Figure 5.6 shows the correct tension measurement
for the track chain.
Figure 5.5: Position of chain bolts and nuts
Figure 5.6: Track chain tensioning
After the tensioning process is completed, it is necessary to grease the track chains, so that
the amphibious excavator can move smoothly. This procedure must be followed if the
amphibious excavator has been parked for an extended period.
5.4.4 WEAR PLATES
The wear plates, which are in contact with the chain rollers, are welded to the pontoons. The
wear plates must be replaced if they are badly worn. The operator can use carbon arc to
remove the used wear plates and replace them with new ones. Refer to Figure 5.7.
Hex Nut-A
Hex Nut-A
Hex Nut B
M36 Bolt
Hex Nut B
M36 Bolt

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6.0 INSTALLATION AND TRANSPORTATION
6.1 TRANSPORTATION
For transportation purposes, all parts of the AT300-V2/AT300PS-V2 must be disassembled
before being loaded onto the truck trailer. Follow the instructions in section “6.4
DISASSEMBLING THE MACHINE” to do the disassembly process. Load the amphibious
parts carefully and make sure they are well placed and secure.
6.2 ASSEMBLING THE MACHINE
After unloading the transport, the reassembly sequences are as follows:
1. Get a crane of the required reach and size to lift the excavator undercarriage. Select an
area of flat, level ground, large enough for the whole machine. Place and align the left
and right undercarriage body components with the correct distance between them. Refer
to Figure 6.2.
WEAR
PLATE
WEAR
PLATE
Figure
5.7:
Wearing
Plate