TMG TMG-TBH90 User manual

9 FT TRACTOR
SWING BACKHOE ATTACHMENT
PRODUCT MANUAL
v2023.01.13
TMG-TBH90
Please read and understand the product manual completely before assembly
Check against the parts list to make sure all parts are received
Wear proper safety goggles or other protective gears while in assembly
Do not return the product to dealer. They are not equipped to handle your requests.
Missing parts or questions on assembly?
Please call: 1-877-761-2819 or email: [e-mail]

IMPORTANT SAFETY INFORMATION.......................................................................................................... 3
SAFETY DECAL LOCATIONS .........................................................................................................................8
PARTS DESCRIPTION AND FUCTION.........................................................................................................10
PRODUCTS SPECIFICATIONS..................................................................................................................... 11
UNPACKING & ASSEMBLY...........................................................................................................................12
CONNECTING TRACTOR.............................................................................................................................. 23
CHECK BEFORE OPERATING....................................................................................................................... 24
CHECK BEFORE OPERATING....................................................................................................................... 20
LUBRICATION POINTS SUMMARY.............................................................................................................27
CONTROLS......................................................................................................................................................28
OPERATING ESSENTIALS............................................................................................................................ 30
OPERATION FINISH.......................................................................................................................................35
MAINTENANCE SCHEDULE......................................................................................................................... 36
TROUBLE SHOOTING.................................................................................................................................... 37
EXPLODED VIEW & PARTS LIST..................................................................................................................38
TABLE OF CONTENTS

Before operating the BACKHOE read the following safety instructions. Failure to comply with these
warnings may result in serious injury or death.
Safety Instructions
The alert symbol is used throughout this manual and this manual and on the product safety decals. This symbol indicates
attention is required and identifies hazards concerning your personal safety and the safety of others. Please follow the
recommended precautions
The safety alert symbol means...
ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
NOTICE -Indicates a situation that could result in damage to the machine or other property.
IMPORTANT SAFETY INFORMATION
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury, and includes
hazards that are exposed when guards are removed. It may also be used to alert against unsafe practices.
CAUTION
Indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury. It may also
be used to alert against unsafe practices.
DANGER
Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. This signal
word is to be limited to the most extreme situations typically for machine components which, for functional
purposes, cannot be guarded.

Safety Rules
It is the operator's responsibility to read, understand and follow ALL safety and operation instructions
in this manual. If you do not understand any part of this manual and require assistance, contact your
dealer.
The operator of this backhoe must be a responsible, physically able person familiar with machinery
and trained in this machine's operation.
Provide instructions to anyone else who is going to operate the machine. This equipment is dangerous to anyone unfamiliar
with its operation.
Review safety related items annually with all personnelwho will be operating or performing maintenance.
Make sure all safety signs on the machine are understood before operating, servicing, adjusting or cleaning. Being unfamiliar
with a machine can lead to injuries.
Replace any safety sign or instruction sign that is not readable or is missing.
Never exceed the limitations of the machine. If its ability to do the job, or to do it safely is inquestion–STOP!
Have a first-aid kit and fire extinguisher available for use should the need arise and know how to use them.
Do not modify the equipment in any way.Unauthorized modifications may affect the integrity of the machine or the ability of the
machine to perform as designed. Modifications can impair safety or function. They can affect the life of the equipment and
void warranty.
Make sure the suspension is correctly mounted and all hardware is torqued to specifications to preventbackhoe from moving
when digging.
Never operate the backhoe without the toplink installed. Make sure it is correctly adjusted to prevent the backhoe from being
pushed upward by digging force. If thebackhoe moves upward the operator can be crushed against the ROPS, FOPS, or cab.
Make sure there is adequate head room for the operator.
Tractor must be equipped with a front loader and ROPS (Roll Over Protection Structure) or ROPS cab. Always wear your seat
belt when operating the tractor. Serious injury or even death could result from falling off the tractor—particularly during a
turnover when the operator could be pinned underneath. Keep a foldable ROPS system in ‘raised–locked’ position at all times.
Do not install backhoe if the total machine weight exceeds the ROPS weight certification.
Ensure suspension is firmly attached and all hardware is torqued to specifications to prevent backhoe frommoving when
digging.
Operating Safety
• Wear appropriate Personal Protective Equipment (PPE) when using this machine.
This includes but is not limited to:
-Hard hat
-Hearing Protection
-Protective shoes with slip resistant soles
-Protective glasses
• Always wear hearing protection if the noise in any area you work in exceeds 80 dB.
-Noise over 85 dB on a long-term basis can cause severe hearing loss.
-Exposure to noise over 90 dB over a long-term basis may cause permanent, total
hearing loss.
-Hearing loss from loud noise (from engines, chainsaws, radios, and other such sources
close to the ear) is cumulative over a lifetime, without hope of natural recovery.
• Know your controls and how to stop engine and attachment quickly in an emergency.
• Be aware of overhead hazards: branches, cables, electrical wires. Have an underground utility
locating/marking service survey the area before digging.
• Keep boom and bucket away from overhead and underground power lines and utilities. High-voltagepower lines can cause
electrocution without direct contact.

• Be sure machine is properly mounted, adjusted and in good operating condition.
• Follow the Pre-operation Checklist before starting work.
• If the backhoe is powered by the tractor / skid steer hydraulic system, oil pressure and flow must be properly matched. If a
PTO drive is used, be sure speed is correct and PTO shaft is properly shielded.
• Never operate controls from the ground. Operate only from the operator's seat to prevent unexpected boom movement that
can lead to crushing between frame members. Ensure all control levers are in neutral or off position before starting.
• Keep all bystanders in the designated safe zone during operation. Never carry, lift or move people on boom or bucket.
• Do not allow riders on this machine at any time. There is no safe place for any riders.
• Have an assistant on site to help you stay aware of situations that may be dangerous. Have the assistant stay in the
designated safe zone, wearing bright, reflective clothing.
• Inspect and secure all guards before starting.
• Before exiting the equipment, always lower the bucket to the ground and engage the parking brake.
• Operate the equipment at a speed that allows you maintain control at all times. Drive slowly over rough terrain and avoid
obstacles.
• Use extreme caution on inclines and edges where the ground could give way.
• Do not try to turn on a steep slope as this could result in a roll-over.
• Face the equipment when getting on and off. Maintain 3-point contact with steps and handrails.
• Never operate this machine under the influence of alcohol or drugs. Consult your doctor about using this machine while
taking prescription medications.
• Do not dig under machine or stabilizers. A cave-in could result causing the machine to fall into the excavation.
• Do not exceed machine lift capacity. Overloading can cause structural damage and lead to unsafe operating conditions.
• Position backhoe so that loads extend directly behind machine when lifting or placing heavy objects.
• Do not walk or work under a raised machine or attachment unless it is securely blocked or held in position. Do not depend on
the tractor hydraulic system to hold the load.
• Keep stabilizers and front bucket on the ground to stabilize the machine. Tractor wheels must be resting on the ground
during operation. Working with the wheels raised off the ground could result in serious injury or death and may cause
damage to the machine.
• Be careful operating the 3-point hitch or skid steer bucket/ loader controls if the backhoe is attached that way. It could cause
damage to the tractor subframe or skid steer tieback.
• Train all new personnel and review instructions frequently with existing workers. Be certain only a properly trained and
physically able person uses the machinery. A person who has not read and understood all instructions is not qualified to use
the machine. An untrained operator can cause possible serious injury or death.
• If this machine is used by any other person, loaned or rented, it is the owner's responsibility to make certain that prior to
using, every operator:
- has read and understands the instructions in the operator's manual
- is instructed in safe and proper use of the equipment
- knows how to place the machine in a SafeCondition
Safe Condition
Throughout this manual, we talk about a ' Safe Condition '. What this means is parking the machine in a manner that makes it
safe to service or repair.
Place the machine in a Safe Condition before performing any service, maintenance work or storage preparation by performing
the following:
•Install boom and swing lock pins, or rest bucket on ground.
•Shut off hydraulic system.
•Set parking brake and shut off engine. Removeignition key.
•Ensure all components have stopped moving.
•Block or chock wheels.

Maintenance Safety
• Have at least two workers present when performing maintenance on this equipment. Never work alone in case an emergency
should arise.
• Keep service area clean and dry.
• Never operate the engine in a closed building. Make sure there is plenty of ventilation. Exhaust fumes can cause
asphyxiation.
• Never work under unsupported equipment.
• Use only genuine OEM replacement parts. The manufacturer is not responsible for injuries or damage caused by the use of
non-approved parts or accessories.
• Make sure all safety shields and devices are re-installed when a maintenance or service procedure is finished.
• Do not use gasoline or diesel fuel when cleaning any parts. Use a regular cleanser.
• Use proper tools that are in good condition. Make sure the procedure is understood before performing any service work.
Hydraulic System Safety
• Make sure that all the components in the hydraulic system are kept clean and in good condition.
• Make sure all components are tight, and that lines, hoses and couplings are not damaged before applying
pressure to the system.
• Do not use your hand to check for hydraulic oil leaks. Hydraulic fluid escaping under pressure can
penetrate the skin causing serious injury. Use a piece of cardboard instead.
• Wear proper hand and eyeprotection when searching for a high-pressure hydraulic leak.
• Seek medical attention immediately if injured by a concentrated high-pressure stream of hydraulicfluid.
Serious infection or toxic reaction can develop from hydraulic fluid piercing the skin surface.
• Do not attempt any makeshift repairs to the hydraulic lines, fittings or hoses by using tape, clamps or
cements. Doing so can cause sudden failure and create a hazardous and unsafe condition.
• Relieve pressure on the hydraulic system beforeworking it. The hydraulic system operates under extremely high pressure.
• Replace any hydraulic hose immediately that showssigns of swelling, wear, leaks, or damage before it bursts.
• Do not bend or strike high-pressure lines, tubes orhoses, or reinstall them in a bent or damaged condition.
• Check to make sure hydraulic hoses are not worn or damaged, and are routed to avoid chafing.
• Never adjust a pressure relief valve or otherpressure- limiting device to a higher pressure than specified.
Safe Zone
For safety of others during operation, set up a Work Zone around the machine. Mark the area with safety cones. Outside of that
would be considered a designated Safe Zone for other workers or bystanders.
Always know where all workers and bystanders are when operating the backhoe. Have them stay outside of the work zone in
the designated Safe Zone. They should only enter the work zone when:
-- The person has made eye contact with and signaled the backhoe operator.
-- The backhoe is in transport position or backhoe bucket is resting on the ground.
-- The engine is shut off.

Work Zone
Establish a Work Zone perimeter the length of maximum boom reach and swing arc. Mark an additional area at least 3 ft (1 m)
around the stabilizers.
While using the backhoe, always be aware of bystanders in the area. A swinging boom can create a collision hazard to workers
or bystanders. Injury may occur from heavy material falling or dropping from the bucket.
Fig. 1 – Establish work zone perimeter
1. Designated Safe Zone
2. Work Zone
3. Boom Swing Arc
4. Safety Cones
Safety within your work zone
The safest place for the operator is in the operator’s seat.
Always operate the backhoe controls from the operator’s seat.
Always be aware of the position of the boom and material being handled.
Be aware of bystanders and workers when lowering stabilizers. Make sure they are in the safe zone where they cannot be
injured.
Always be aware of hazards such as:
Underground utilities
Tree roots
Structures close to the excavation site
Excavating on a slope
Excavating too close to the stabilizers
Modify your work zone to account for overhead hazards:
Telephone lines
Tree branches
Roof overhang
Wash lines, ropes or cables
Power lines—maintain a 20 ft (6 m) distance. Electrocution can occur without direct contact (arcing).

The safety decals and their positions are shown on the illustration below. Good safety requires that you familiarize yourself with
the various safety decals, the type of warning and the area or specific function related to that area that requires your SAFETY
AWARENESS.
SAFETY DECAL LOCATIONS
8
7
7
7
7
7
4
5
2
6
7
3
1
9

Warning Decals
(1)
(2)
(3)
(4)
(5)
(6)
(8)
(7)
(9)

PARTS DESCRIPTION ANDFUCTION
1.Console assembly: Control machine
2.Boom assembly: The arm that performs the digging action
3.Seat assembly: Sit on the seat when operating the machine
4.Three-point hitch assembly: Connecting Tractor and Backhoe
5.Steering assembly: The left and right digging angle of the boom is adjusted by the hydraulic device
6.Base assembly: Base to support the machine
7.Outrigger assembly: Legs to adjust machine height
8.Bucket assembly: Bucket A barrel-shaped member used for digging loose materials such as soil, sand,
gravel, and construction waste
1. Console assembly
2. Boom assembly
5. Steering assembly
6.Base assembly
7. Outrigger assembly
8. Bucket assembly
4.Three-point
hitch assembly
3.Seat assembly

Specifications
TMG-BH900
A
Digging Depth(2 ft. flat bottom)
9’
B
Overall Operating Height(fully raised)
123”
C
Reach from Swing POST
129”
D
Loading Height(bucket at 60°rotation)
84”
Dipper Boom Digging Force
2200 lbs
E
Transport Height(with boom fully retracted)
80”
Transport Width(with stabilizers up)
58”
F
Transport Length
72”
G
Ground Clearance
10-12”
Swing Arc
180°
J
Stabilizer Spread (Spread)
89”
K
Stabilizer Spread (Transport)
58”
Bucket Digging force (lbs)
3300
Operating Pressure (psi)
2320
Recommended Tractor HP
45-100 HP
Optional accessories
Tank Capacity (Gallon US):
4.5
Pump Flow Rate (GPM US)
5.85
PRODUCTS SPECIFICATIONS

1. After unpacking, check the following components
The parts marked with numbers in the figure are the parts that need to be assembled.
*. All numbers are not part numbers in the drawings. For correct part numbers, see explosive diagram.
UNPACKING & ASSEMBLY
1
2
3
4
5
6
7
9
8
10
12
11
13
14
15
16
17
18
(Optional)
19
20
21
22

NO.
DESCRIPTION
QTY
NO.
DESCRIPTION
QTY
1
Base assembly
1
13
Cotter pin 4x32
4
2
Small boom assembly
1
14
Pin shaft Ø30x181
1
3
Seat components
1
15
Pin shaft Ø25x137
1
4
Upper link assembly
1
16
Fully threaded hex bolts M6x50
1
5
Tie rod welding
2
17
Fully threaded hex bolts M6x60
1
6
Three-point suspension
connection seat welding
2
18
Non-metallic insert hex lock nuts
M6
2
7
Stabilizer legs assembly
2
19
Pin welding 142
1
8
Fully threaded hex bolts M12x45
4
20
Swivel joint pin
1
9
Plain washer Ø12
8
21
R pin
1
10
Non-metallic insert hex lock nuts
M12
4
22
Flow control valve connecting oil
pipe 1/2”(ID)X78”, 1/2 NPT fitting
2
11
Outrigger cylinder pin Ø20x133
4
Optional
Gear pump assembly
1
12
Plain washer Ø20
4
* All numbers are not part numbers in the drawings. For correct part numbers, see explosive diagram.
After the parts are confirmed to be correct and the tools for installation are ready, start the assembly. The specific operation
steps are described below.
TOOLS FOR INSTALLATION
NO
DESCRIPTION
SPECIFICATION
CONDITIONS OF USE
QTY
1
Open End Wrench
10/13/18/21/30
M6, M8, M12, M14, M20 bolt fastening
2
2
Air Impact Wrench
1280t
Match the corresponding sleeve instead of the wrench to
tighten the bolt
1
3
Hammer
1
4
Torque Wrench
10-220N·m
Measuring torque
1

2. Install the Stabilizer Legs Assembly
Installation steps:
Place the stabilizer legs assembly (5) at the position shown in the figure above, align it with the installation hole on the base
assembly (1), pass through the pin shaft Ø20x133 (A14), and install the washer 20 (A13), and the cotter pin 4x32 (A12) , the left
and right outriggers are installed in the same way.
Importance: All bolts are locked in place without shaking.
WARNING: Once the assembly bolts are not fastened in place, there will be abnormal noises when the machine is
working.
PART NO.
DESCRIPTION
QTY
1
Base assembly
1
5
Stabilizer legs assembly
1
A12
Cotter pin 4x32
4
A13
Flat washer Ø20
8
A14
Outrigger cylinder pin Ø20x133
4
5
A14
A14
A12
A13
1
5

3. Install three-point hitch assembly
G6
G1
G19
G5
G13
G14
G15
G16
G1
G21
G5
G22
G6
G4
G5
G17
G19
G5
G5
G6
G6
G12
G13
G14
G15
G16
G5
G22
G21
G4
G5
G6
G12
G6

Installation steps:
1. Align the assembly of upper link (G1) with the mounting hole under the seat, insert it into hexagon head bolt (G19),
plain washer (G5), and then secure it with plain washer (G5) and locknut (G6), taking care to tighten the bolts after all
components are installed.
2. Install connecting base weldment (G13,G17) on the base assembly, insert full-thread hexagon bolt (G14) and plain washer
(G15), secure it with plain washer (G15) and locknut (G16), taking care to tighten the bolts after all components are installed.
3. Use pull rod weldment (G4 and G21) to connect the assembly of upper link (G1), connecting base weldment (G13,G17)
respectively, insert full-thread hexagon bolt (G12,G22), plain washer (G5) respectively, and then secure it with plain washer
(G5) and locknut (G6), taking care to tighten the bolts after all components are installed.
Noted: When connecting the pull rod weldment (G4 and G21), different mounting holes can be selected in the assembly of
upper link (G1) and base weldment (G13,G17) according to different tractor
Importance: All bolts are locked in place without shaking.
WARNING: Once the assembly bolts are not fastened in place, there will be abnormal noises when the machine is
working.
PART NO.
DESCRIPTION
QTY
G1
Upper link
1
G4
Pull rod weldment
1
G5
Plain washer Ø20
8
G6
Locknut M20
4
G12
Full-thread hexagon bolt M20x55
2
G13
Connecting base weldment
1
G14
Full-thread hexagon bolt M14x45
8
G15
Plain washer Ø14
16
G16
Locknut M14
8
G17
Connecting base weldment
1
G19
Hexagon head bolt M20x190
1
G21
Pull rod weldment
1
G22
Hexagon head bolt M20x130
1

4. Install the seat assembly
Installation steps:
Align the seat assembly (1) with the 4 mounting holes on the the base assembly, and install the full-threaded hexagon bolt (A6),
plain washer (A7), non-metallic insert hexagon lock nut (A8), taking care to tighten the bolts after all components are installed.
Importance: All bolts are locked in place without shaking.
WARNING: Once the assembly bolts are not fastened in place, there will be abnormal noises when the machine is
working.
PART NO.
DESCRIPTION
QTY
1
Seat assembly
1
A6
Fully threaded hex bolts M12x45
4
A7
Plain washer Ø12
8
A8
Non-metallic insert hex lock nuts M12
4
A6-A7-A8
1

5. Install small boom assembly
Installation steps:
1. Align the small boom assembly (D13) with the mounting hole on the base assembly as shown in the above figure, penetrate
the pin shaft Ø30x181 (D9), install the bolt M6×60 (D8), and the nut M6 (D3) to lock and fix it.
2. Connect the upper oil cylinder and the small boom assembly in series, penetrate the pin shaft Ø25x137 (D26) of the grease
fitting, install the bolt M6×50 (D25), and the nut M6 (D3) to lock and fix it.
Importance: All bolts are locked in place without shaking.
WARNING: Once the assembly bolts are not fastened in place, there will be abnormal noises when the machine is
working.
PART NO.
DESCRIPTION
QTY
4
Small boom assembly
1
D3
Non-metallic insert hex lock nuts M6
2
D8
Fully threaded hex bolts M6x60
1
D9
Pin shaft Ø30x181
1
D25
Fully threaded hex bolts M6x50
1
D26
Pin shaft Ø25x137
1
4
D25
D26
D3
D3
D8
D9

6. Install and connection hydraulic tubing
D23
D24
E3
E16
H2
E3
E1

Connection steps:
As shown in the figure above, there are still 6 oil pipes that need to be connected. One side of these 6 oil pipes has been
connected to the multi-way valve, and the other side needs to be connected to the oil cylinder. The product number is marked on
the oil pipe joint. The oil pipe is connected to the corresponding oil cylinder joint according to the product number shown in the
figure above.
1. Bucket cylinder oil outlet pipe (D23)is connected with the outlet nozzle of the bucket cylinder (D27) on the small boom
assembly (D13). Bucket cylinder oil inlet pipe (D24) is connected with the inlet nozzle of the bucket cylinder (D27) on the small
boom assembly (D13).
2. Right outrigger cylinder oil inlet pipe (E1)and oil inlet pipe of left outrigger oil cylinder (E16) are connected with the intlet nozzle
of the outrigger cylinder (E2) on the strut weldment (E5). Outrigger cylinder oil outlet pipes (E3) are connected with the outlet
nozzle of the outrigger cylinder (E2) on the strut weldment (E5).
Installation steps:
There are two hydraulic tubing installations, one end connected to the flow control valve, the other end connected to the hydraulic
output of the tractor when in using. Now connect one end of the flow control valve.
1. Install one hydraulic tubing to tee joint (H19) connector of flow control valve body (H6).
2. Install other hydraulic tubing to pump suction fitting (H3) connector of flow control valve body (H6).
WARNING: All tubing joints must be tightened, otherwise there will be oil leakage, and the machine operation cannot
achieve the effect.
PART NO.
DESCRIPTION
QTY
H2
Flow control valve connecting oil pipe 1/2”(ID)X78”, 1/2 NPT fitting
2