Kubota BH92 User manual

ASSEMBLY
INSTRUCTIONS
MODEL BH92
READ AND UNDERSTAND THIS MANUAL
BEFORE ASSEMBLING
Code No. 7K505-7916-1 English (U.S.A.)
PRINTED IN U.S.A ©KUBOTA Corporation 2009

CONTENTS
TO THE DEALER..................................................................................................... 1
SAFETY ................................................................................................................... 1
UNPACKING AND CHECKING PARTS .................................................................. 2
UNPACKING WOODEN CRATE...................................................................................... 2
CHECKING PARTS.......................................................................................................... 3
OPERATION ............................................................................................................ 9
TRACTOR PREPARATION ................................................................................... 10
ASSEMBLY [L3560, L4060, L4760, L5460, L6060 CAB Model]............................ 10
Preparation .....................................................................................................................10
Sub Frame......................................................................................................................10
Hydraulic Line.................................................................................................................13
CAB Spacer .................................................................................................................... 17
ASSEMBLY [L3560, L4060, L4760, L5060, L5460, L6060 ROPS Model]............. 18
Preparation .....................................................................................................................18
Sub Frame......................................................................................................................18
Hydraulic Line.................................................................................................................21
Tool box.......................................................................................................................... 25
ASSEMBLY [L3240-3 - L5740-3 CAB Model] ........................................................ 26
Preparation .....................................................................................................................26
Hydraulic Line.................................................................................................................26
Sub Frame......................................................................................................................28
CAB Spacer .................................................................................................................... 31
ASSEMBLY [L3240(-3) - L5740(-3) ROPS Model] ................................................ 31
Preparation .....................................................................................................................31
Layout of BH92 Backhoe Hydraulic Lines ...................................................................... 32
Hydraulic Line.................................................................................................................32
Sub Frame......................................................................................................................34
ASSEMBLY [L4400-1, L4600 , L4701, MX4700, MX4800, MX5100, MX5200,
MX5400, MX5800, MX6000] .................................................................................. 38
Layout of BH92 Backhoe Hydraulic Lines ...................................................................... 38
Preparation .....................................................................................................................38
Sub Frame......................................................................................................................38
Hydraulic Line.................................................................................................................43
SETTING UP DIPPERSTICK AND BUCKET ........................................................ 45
Dipperstick...................................................................................................................... 45
Bucket............................................................................................................................. 46
INSTALLING THE BACKHOE ............................................................................... 47
REMOVING THE BACKHOE................................................................................. 49
Removal of The Backhoe ............................................................................................... 49
Storage of The Backhoe................................................................................................. 51
PRE-OPERATION CHECK.................................................................................... 52
Lubrication ...................................................................................................................... 52
Transmission Fluid.......................................................................................................... 52
ASSEMBLY TIME .................................................................................................. 53
TIGHTENING TORQUE OF BOLTS AND NUTS .................................................. 54
TIGHTENING TORQUE OF ADAPTORS, ELBOWS AND OTHERS.................... 55
CHECK LIST FOR INSPECTION AFTER ASSEMBLY ......................................... 56

CONTENTS

1
TO THE DEALER
1. This manual contains procedures intended to assist
the dealer in unpacking and assembling the product
before delivering to the customer.
The customer's purchase is based on confidence in
both the product and your store. Observe the
procedures in this manual to assemble and adjust
equipment for your customer's safety and satisfaction.
When fully assembled, check function of each part and
feature.
2. The following safety alert symbol marks and
indications are found throughout this manual in steps
where particular attention is required so as to ensure
your safety and to avoid product damage. Observe
the instructions in these warnings where indicated.
SAFETY
To prevent accidents, read through the following items
before starting work, and always regard safety when
working. It is your responsibility to ensure your safety on
the job.
1. Preparations
(1) Select a work site which is level, has sufficient
space, and is not close to dangerous objects.
(2) Avoid poorly ventilated rooms. Asphyxiation from
exhaust fumes is always a possibility that
accompanies running engine.
(3) Working clothes which may be pinched or caught
in the equipment must not be worn. Loose
clothing can cause serious injury or death.
(4) Always wear a mask and protective goggles
during work when dust or flying debris may be
thrown by equipment.
2. Assembly and adjustments
(1) Before assembling equipment, read the assembly
instructions for the product to become familiar
with the equipment and procedures.
(2) Use only adequate and required equipment, tools
and instruments (e.g. torque wrench, battery
hydrometer and etc.).
(3) Set the parking brake and block wheels to prevent
machine (or tractor) movement.
(4) Lower the attachment or implement to the ground
before assembling or adjusting equipment.
Indicates an imminently
hazardous situation which, if not
avoided, will result in death or
serious injury.
Indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
Indicates a potentially
hazardous situation which, if not
avoided, could result in minor or
moderate injury.
Indicates that equipment or
property damage could result if
instructions are not followed.
Gives helpful information

2
(5) Before working under suspended or raised
equipment, support the equipment or attachment
to prevent the machine from falling or moving out
of place.
(6) Keep fire from cigarettes, matches or other
ignition sources away from fuel, oil, antifreeze and
other flammable materials.
3. After assembly check
(1) Before operating or test driving the equipment,
read and understand the operator's manual.
(2) Once the equipment is fully assembled, select a
safe place for a test run. Prevent bystanders from
approaching the equipment.
To avoid personal injury or death:
ADo not start engine or operate levers from
anywhere other than the seat.
To avoid personal injury:
ADo not bypass-start the equipment. Short
circuiting the starter terminal runs the risk that
the equipment will start operating or moving
unexpectedly.
Bprocesses
1. processes mean any process that requires priority
control due to its characteristics of having a high
probability of leading to physical injuries or fire
disasters because of abnormal values and defects in
manufacturing quality.
2. The marks in the text indicate the processes that
include the following safety characteristics.
(1) Any assembly process with important safety
characteristic values that require control to ensure
product safety.
(2) Any assembly process with characteristic values
having impact on the strength and performance of
parts.
(3) Previous occurrence of accidents related to
process (including probability.)
UNPACKING AND CHECKING PARTS
BUNPACKING WOODEN CRATE
1. Cutting metal bands (if two are banded together).
Metal bands hold the two crates together as one. Cut
these bands and separate the crates.
2. Unpacking the crates
(1) Hook a hoist to the 4 corners of the crate and raise
the hoist cable until taut.
This serves to prevent the upper part of the crate
from striking the backhoe when cut.
(2) Saw the crate as indicated in the figure below.
(3) Raise the upper part of crate and remove from the
immediate area.
(4) Remove the remaining slats from the crate.
These are indicated by the oblique lines in
Figure 1....... ///////
Figure 1 : Cutting area of the crate
ASawing outside the indicated area may damage the
backhoe or accessory parts.
ABe sure that the crate is free of other obstructions
(e.g. nails, staples and etc.).
(1) Nylon strap (A) Front
(B) 300 mm (12 in.)

3
BCHECKING PARTS
Remove all backhoe components. Referring to the illustration, insure that all components have been included.
(1) Backhoe bucket
(2) Dipperstick (arm) assy
(3) Main frame-Boom assy
(4) Pin (1.25 in. x 8.82 in.)
(5) Hex. bolt (M10 x 80)
(6) Locking nut (M10)
(7) Pin (1.5 in. x 10.2 in.)
(8) Spacer
(9) Pin (1.25 in. x 6.16 in.)
(10) Hex. bolt (M10 x 65)
(11) Locking nut (M10)
(12) Sub frame RH
(13) Sub frame LH

4
(1) Front bracket
(2) Rear bracket LH
(3) Rear bracket RH
(4) Frame support
(5) Connecting plate LH
(6) Connecting plate RH
(7) Joint
(8) Joint stay
(9) Cab spacer LH
(10) Cab spacer RH
(1) Front bracket
(2) Rear bracket
(3) Frame support
(4) Connecting plate LH
(5) Connecting plate RH
(6) Joint
(7) Joint stay
(8) Cab spacer LH
(9) Cab spacer RH
(A) 224 mm (8.82 in.)
(B) 242 mm (9.53 in.)

5
(1) Front bracket
(2) Rear bracket LH
(3) Rear bracket RH
(4) Frame support
(5) Connecting plate LH
(6) Connecting plate RH
(1) Front bracket
(2) Rear bracket
(3) Frame support
(4) Connecting plate LH
(5) Connecting plate RH
(A) 224 mm (8.82 in.)
(B) 242 mm (9.53 in.)
(1) Front bracket
(2) Rear bracket LH
(3) Rear bracket RH
(4) Frame support
(1) Front bracket
(2) Rear bracket
(3) Frame support
(A) 224 mm (8.82 in.)
(B) 242 mm (9.53 in.)

6
AFor assembling, the optional outlet hose (Part No.
7K505-6492-0) is required.
(1) Sub frame RH
(2) Sub frame LH
(3) Connecting plate RH
(4) Connecting plate LH
(1) Rear bracket
(2) Frame support
(3) Sub bracket RH
(4) Sub bracket LH
(5) Connecting plate RH
(6) Connecting plate LH
(7) Tool box stay

7
AThe BH4999 frame kit is commonly utilized for all the
related models.
(1) Front bracket LH
(2) Front bracket RH
(3) Rear bracket
(4) Frame support
(5) Sub bracket RH
(6) Sub bracket LH
(7) Connecting plate RH
(8) Connecting plate LH
(1) Front bracket
(2) Rear bracket LH
(3) Rear bracket RH
(4) Frame support
(5) Sub frame RH
(6) Sub frame LH
(7) Connecting plate
(1) Sub frame LH
(2) Sub frame RH

8
(1) Rear bracket LH
(2) Rear bracket RH
(3) Frame support
(4) Connecting plate LH
(5) Connecting plate RH
(6) Cab spacer LH
(7) Cab spacer RH
(1) Rear bracket LH
(2) Rear bracket RH
(3) Frame support
(4) Connecting plate LH
(5) Connecting plate RH
(6) Joint stay
(7) Cab spacer LH
(8) Cab spacer RH
(1) Rear bracket LH
(2) Rear bracket RH
(3) Frame support
(4) Connecting plate LH
(5) Connecting plate RH

9
OPERATION
1. BH92 backhoe is approved for use on:
AL3240-3, L3540-3, L3940-3, L4240-3, L4740-3,
L5040-3, L5240-3 and L5740-3 tractors with
foldable ROPS or CAB, LA514, LA724 or LA854
Loader and applicable backhoe mount Kit only.
AL3240, L3540, L3940, L4240, L4740, L5040,
L5240 and L5740 tractors with foldable ROPS,
LA514, LA724 or LA854 Loader and applicable
backhoe mount Kit only.
AL4600 and L4701 tractors with foldable ROPS,
LA764 or LA765 Loader and applicable backhoe
mount kit only.
AL4400-1 tractors with foldable ROPS, LA703
Loader and applicable backhoe mount kit only.
AMX4700, MX4800, MX5100, MX5200, MX5400,
MX5800 and MX6000 tractors with foldable ROPS,
LA844 or LA1065 Loader and applicable backhoe
mount kit only.
AL3560, L4060, L4760, L5060, L5460 and L6060
tractors with foldable ROPS or CAB, LA805 or
LA1055 Loader and applicable backhoe mount kit
only.
2. The BH92 backhoe can not be mounted on a tractor
together with mid mount mower.
3. When using other implements with backhoe removed,
mount the 3-point linkage to the tractor.
4. Removal and reinstallation of backhoe sub frame
should be performed by your KUBOTA dealer.
5. Save the loader sub frame and the 3-point linkage
components which are removed.
COperating seat support link
1. Tilt the seat down at the front to provide foot space,
and watch your step when getting on or off.
2. Before sitting down, make sure the support link is
resting on the lock plate and the seat is stable.
3. To avoid pinching a hand, keep them away from seat
support link.
(1) Rear Bracket LH
(2) Rear Bracket RH
(3) Frame Support
(4) Connecting plate LH
(5) Connecting plate RH
(1) Support link
(2) Lock plate

10
TRACTOR PREPARATION
1. Park the tractor on a hard and level surface.
2. Remove the 3-point linkage from the tractor.
ASSEMBLY [L3560, L4060, L4760, L5460,
L6060 CAB Model]
BPreparation
1. Detach the rear tire from the tractor.
BSub Frame
1. Detach the front loader sub frame.
2. Detach the collar and attach the rear bracket in place.
(1) Sub frame
(1) Rear bracket
(2) 2 - M14 x 148 bolts [Original bolts]
2 - M14 spring lock washers
Tightening torque: 167 to 196 N·m
(17.0 to 20.0 kgf·m, 123 to 144 lbf·ft)

11
3. Attach the rear bracket in place.
4. Tighten a bolt only one of the front of a sub frame and
lift the back end of the sub frame using a hoist.
ABe sure to apply a nylon strap to the back end of the
sub frame for hoisting it.
AIf the rear of the sub frame is raised too much with a
crane, it will hit the fuel tank. Take much care not to hit
it when raising the rear of the sub frame.
5. Temporarily tighten the bolts and nuts in place.
(1) Rear bracket
(2) 2 - M14 x 30 bolts
2 - M14 spring lock washers
Tightening torque: 124 to 147 N·m
(12.6 to 15.0 kgf·m, 91.5 to 108.4 lbf·ft)
(1) Sub frame
(2) 1 - M16 x 60 bolt
1 - 5/8 hardened plain washer
1 - M16 spring lock washer
1 - M16 nut
(1) 3 - M16 x 60 bolts
3 - 5/8 hardened plain washers
3 - M16 spring lock washers
3 - M16 nuts
Tightening torque: 196 to 225 N·m
(20.0 to 23.0 kgf·m, 145 to 166 lbf·ft)

12
AIf the number of bolts and that of hardened plain
washers are the same, additionally put the hardened
plain washers at the nut.
6. Wind the sealing tape around the joint coupler.
Attach the female coupler and plug to joint coupler.
(1) Rear bracket
(2) Frame
(3) 2 - M16 x 50 bolts
2 - 5/8 hardened plain washers
2 - M16 spring lock washers
2 - M16 nuts
(4) 4 - M16 x 50 bolts
4 - 5/8 hardened plain washers
4 - M16 spring lock washers
4 - M16 nuts
(5) 2 - M16 x 140 bolts
2 - 5/8 hardened plain washers
2 - M16 spring lock washers
2 - M16 nuts
Tightening torque: 196 to 225 N·m
(20.0 to 23.0 kgf·m, 145 to 166 lbf·ft)
(1) Bolt
(2) Hardened plain washer
(3) Nut
(1) Joint coupler
Thread size: 1/2 - 14 NPT
Tightening torque: 49 to 58 N·m
(5.0 to 5.9 kgf·m, 36 to 43 lbf·ft)
(2) Female coupler
(3) Plug
(4) Sealing tape

13
7. Attach the frame support, connecting plate and joint
stay.
Attach the joint coupler to joint stay.
ADo not tighten fasteners until all components are
assembled.
AFinally tighten the fasteners to the specified torque.
BHydraulic Line
1. Remove each bolt and raise the operating seat. And
then lock the seat.
2. Remove the bolt and tube.
(1) Frame support
(2) Connecting plate
(3) 6 - M16 x 50 bolts
6 - 5/8 hardened plain washers
6 - M16 spring lock washers
6 - M16 nuts
(4) [Left side]
6 - M16 x 50 bolts
6 - 5/8 hardened plain washers
6 - M16 spring lock washers
6 - M16 nuts
[Right side]
3 - M16 x 55 bolts (Joint stay)
3 - M16 x 50 bolts
6 - 5/8 hardened plain washers
6 - M16 spring lock washers
6 - M16 nuts
(5) Joint stay [RH only]
Tightening torque: 196 to 225 N·m
(20.0 to 23.0 kgf·m, 145 to 166 lbf·ft)
(6) Joint coupler
(7) 2 - M8 X 20 bolts
(1) 4 - M8 bolts
(2) 2 - M8 nuts
(1) Operating seat (A) Raise
(B) Lock the seat
(1) 2 - M8 bolts
(2) Tube

14
3. Wind the sealing tape around the backhoe outlet hose.
Attach sleeve by band cord, male coupler and cap to
the outlet hose.
4. Connect the joints as shown below and connect the
backhoe inlet hose and backhoe outlet hose. Then
tighten the bolts using torque.
5. Connect the backhoe inlet hose to the coupler joint.
6. Lower the operating seat and tighten each bolt.
7. Connect the male coupler to the female coupler.
Pass the outlet hose through the coupler joint hose
guide.
(1) Backhoe outlet hose (Green)
(2) Male coupler
Thread size:1/2 - 14 NPT
Tightening torque: 49 to 58 N·m
(5.0 to 5.9 kgf·m, 36 to 43 lbf·ft)
(3) Cap
(4) Sleeve
(5) Band cord
(1) Backhoe outlet hose
(2) Backhoe inlet hose
Thread size: 3/4 - 16 UNF
Tightening torque: 36 to 40 N·m
(3.7 to 4.1 kgf·m, 27 to 30 lbf·ft)
(3) Joint
Tightening torque: 90 to 108 N·m
(9.2 to 11.0 kgf·m, 67 to 79 lbf·ft)
(4) 2-M8 bolts
Tightening torque: 23.6 to 27.4 N·m
(2.4 to 2.8 kgf·m, 17.4 to 20.2 lbf·ft)
(A) 10
(1) Backhoe inlet hose
Thread size: 3/4 - 16 UNF
Tightening torque: 36 to 40 N·m
(3.7 to 4.1 kgf·m, 27 to 30 lbf·ft)
(2) Coupler joint
(1) Male coupler
(2) Female coupler
(3) Outlet hose (Green)
(4) Coupler joint

15
8. Attach the operating seat to the floor seat cover.
Tighten the bolts and nuts by correct tightening torque.
CRear wheels
1. Install the right and left rear wheels to the tractor
with the bolts and nuts. Tighten the bolts and nuts by
the correct tightening torque.
CLoader option
(When the machine is equipped with the 3rd function
or the hydraulic 2 lever quick coupler)
1. Disconnect the loader option's hoses.
2. Remove the sub frame bolts first and then the optional
valve cover.
(1) Operating seat
(2) Floor seat cover
(3) 4 - M8 bolts
(4) 2 - M8 nuts
Tightening torque: 23.6 to 27.4 N·m
(2.4 to 2.8 kgf·m, 17.4 to 20.2 lbf·ft)
(1) Tightening torque: 215 N·m
(21.9 kgf·m, 158.6 lbf·ft)
(1) Hose (P.B) (Green)
(2) Hose (OUT) (Gray)
(3) Hose (IN) (Orange)
(1) Sub frame
(2) 2 - M16 nuts
(3) Valve cover
(4) 3 - M8 bolts

16
3. Disconnect the coupler, the relay and the band cord.
[3rd function]
[Hydraulic 2 lever quick coupler]
4. Disconnect the 3rd function hose and the hydraulic 2
lever quick coupler hose.
Remove the bolts and take the valve out of the sub
frame.
5. Dismount the loader sub frame.
6. Mount the backhoe sub frame instead.
(For details, see "Sub Frame" in "ASSEMBLY [L3560,
L4060, L4760, L5460, L6060 CAB Model]" section.)
7. Disconnect the inlet hose (Green) from the tractor P.B.
port.
(1) Band cord
(2) Coupler
(3) Relay
(1) 3rd Function Hose
(2) HYD. 2 lever quick coupler Hose
(3) Wire harness
(4) 4 - M10 bolts
(1) Inlet hose (Green)

17
8. Connect the inlet hose that was dismounted in the
previous step to the coupler joint and angle to 55° to
avoid contact with the rear lift arms as shown in
picture.
9. Pass the backhoe outlet hose through the coupler joint
hose guide and connect this hose to the tractor P.B.
port.
10.Reattach the related parts in the reverse order of
dismounting the loader option.
(For details, refer to LA555, LA805, LA1055
ASSEMBLY INSTRUCTIONS.)
11.Ensure all hydraulic hose connection points torqued
before starting the tractor.
BCAB Spacer
1. Attach the cab spacer.
(1) Inlet hose
(2) Coupler joint
(3) Backhoe outlet hose
Thread size: 3/4 - 16 UNF
Tightening torque: 36 to 40 N·m
(3.7 to 4.1 kgf·m, 27 to 30 lbf·ft)
(A) 55
(1) Cab spacer
(2) 6 - M20 x 55 bolts
12- 3/4 hardened plain washers
6 - M20 spring lock washers
6 - M20 nuts
Tightening torque: 368 to 431 N·m
(37.6 to 44.0 kgf·m, 272 to 318 lbf·ft)