Home of the The Affordable
Workhorse.
4 Wheel Drive Jinma and Kama
Tractors.
Perfect for Small Farms, Orchards,
Ranching,
Nursery, Feedlots and multiple other uses.
The Jinma /
Gulin
Backhoe
The page contains multiple pictures and may
take some time to load.
We do not recommend you perform this lift
with your backhoe. This rear lift is completely unnecessary and
is
only shown here to indicate the capability and strength of these
backhoes.
Overall Backhoe Observations:
The Jinma JW-03 and the Gulin YW-6 backhoe are a virtually self
contained
unit and is NOT 3 point mounted. Crate
dimensions
are: H60 x L89 x W26 and about 1,500 pounds. Your hoe is removable from
the tractor after it has been installed and set up. With an impact
wrench,
we have removed a hoe from a tractor in as little as 20 minutes. 10
minutes
more and you have re-installed your 3 point arms and drawbar, put the
cover
plate back on the pump outlet and are ready to go.
The entire system hydraulics for the hoe operate independently from
a 6.6 gpm pump that is mounted to the rear of the tractor just above
the
PTO shaft. This pump is supplied with the hoe and you must remove a
blank
cover plate held on by 4 bolts to access the shaft that runs the pump.
Some tractors are delivered with a 3 bolt cover and will require an 3
to
4 bolt adapter to allow the pump to bolt up to the tractor. On the
tractor
side is a shaft with female slot that is mated to the pumps male slot
and
then bolted in place. Be sure to use the gasket or rtv silicone and
rotate
the pump shaft to the correct angle prior to assembly so that they mate
correctly. The bolts that hold the cover plate are kept with the plate
as they are not long enough to mount the pump. (Save the plate and
bolts
- you will need them if you ever remove your hoe.) We have found that
you
do not always get the correct length bolts in your bolt pack for
mounting
the pump so you may have to go out and purchase some that are slightly
longer. Hoses from the hoe are then mounted to the pump. Suction
line will be low on reservoir tank and mounts on the left side of the
pump
(facing forward as if driving the tractor) and the pressure side is on
the right. Each hose has a compound fiber washer that is in inserted on
the hose fitting prior to fastening onto the pump - make sure the
washer
is in place - coating it with wheel bearing grease prior to
installation
will help to keep in there. These washers are necessary to prevent
leaking
and also to prevent air from getting into the system which will cause
foaming
of the oil. The oil tank will need to be filled with standard hydraulic
oil prior to running the hoe. Operate the levers to displace the
air in the lines and again fill the tank to the correct level.
The
540/1000 rpm lever has no effect on the hoe operation. Remember
that
the hoe pump will not rotate with the tractor clutch completely
disengaged
and a lever to engage and disengage the pump is located low and to the
rear of your brake pedal foot while sitting in the seat.
The backhoe is mounted to what we call a ladder frame which comes
in the crate with your hoe. This ladder is then penned to the tractor
underneath
using the lower part of the loader brackets at the front. If you do not
have a loader then other brackets are used. For the rear the
ladder
uses a triangle bracket which is bolted through the slots in the ladder
frame and in turn hangs from the main 3 point pins (not 3 point arms).
The bolts that go through the ladder slots are tightened and secure
after
everything is in place. We recommend that the factory ladder
system
which is shipped with the backhoe be strengthened prior to any mounting
by welding 2 x 2 x 1/4 steel to the bottom of the main bracket arms. We
used 2x4 steel shown here but this does decrease ground clearance
considerably
and is not recommended for hilly terrain.
The side stabilization cylinders are loose in the crate and need
mounted to the hoe. Unfortunately when they are removed for shipping
they
often do not mark which hose goes to which end of the cylinder so you
are
forced to mount them, assemble the hoses to the cylinder and see if
they
raise and lower the correct way when you move the lever. If not
correct,
then reverse the hoses. Additionally we feel that the side pads do not
extend far enough into the ground. We welded a single heavy flat bar
which
is pointed on the end to each pad. This helps to nail the entire
platform
to the ground while digging.
We also recommend that you weld a flat bar across the two pin pivot
points shown below. This keeps them from spreading under load.
Additionally
you will find that the stress load may break the pivot pin hold
downs.
A bolt will suffice if the pin can only be removed from one direction.
If it is a two direction pin then you must use the ones supplied or a
similar
system that may include a washer or steel bar welded to the end - you
may
want to keep spare pins on hand. You may find that grease zerks
are
broke off on your new hoe. We cannot replace them for you from a
thousand
miles away - please use a removal tool to backout the broken part -
take
out one that is not broken and go down to your local parts supply house
and purchase some new ones. These are all things that you do yourself.
Remember Tractor Outlet is your tractor importer not your local
assembly
dealer - this is how you saved money - these minor things that
may
need attention are up to you to repair.
As a final note: We have
personally
dug more than 1000' of trenches to a depth of 4 to 6 feet with
our
own BH mounted on an JM184. Good BH operation is based on a
sturdy
platform with engine RPM at just below redline. FEL bucket should be
tilted
vertical and the front of the tractor lifted off the ground to
maximum.
Rear mounted stabilizer pads should be extended fully into the
ground.
Spool valves and levers require some hand/eye co-ordination and
experience.
Practice makes perfect and before long you will be running your hoe
like
a pro. A quick hint from a professional is to not bother raising the
loaded
bucket above the mound when dumping. Just clear the hole and dump
the bucket low into the dirt pile. The loose dirt you have
previously
dumped will be easily pushed away with the back side of the bucket as
it
rotates away. With some minor modifications we have found this to be an
excellent backhoe priced at half of a stateside manufactured
unit.
If you ordered a Tractor/FL/BH package then it came with a reversing
swivel
seat. If you order a backhoe to fit your own tractor don't forget
to order your reversing seat. In a pinch you can reverse a
standard
seat to fit backwards but this may not be real handy. The BH system is
designed for use on the Jinma "Backhoe Ready" tractors. Mounting
on any other tractor will
require a PTO driven hyd pump and some hyd. hose adapters. Be
sure
to check our Service
Bulletin Page for maintenance to your backhoe hydraulic system.
The
picture below shows the 3 point mount system.
The following is compiled information on the Gulin Series of
Backhoes.
Although prices are the same for JW-03, YW-6, and LW-6 backhoes,
customers can choose from those and other backhoe models. Specs
for the YW-6 are identical to the Jinma JW-03, but the YW-6
uses superior cylinders and there are other minor differences.
Available are the Gulin LW series backhoe. LW-6, LW-7, and LW-8.
Factory designed to be a 3 point mount.
Specification LW-6
a. Max. digging depth (mm) 1850
b. Max. digging depth Flat bottom (mm) 1600
c. Max. digging height (mm) 2500
d. Load over height (mm) 1400
e. Transport height (mm) 1733
f. Ground clearance (mm) 280
g. Boom pivot height (mm) 420
h. Straight wall digging depth (mm) 895
i. Max. digging radius (mm) 2800
j. Loading reach (mm) 1044
k. Bucket rotation 160 degrees
l. Swing Arc 140 degrees
Specification LW-7
a. Max. digging depth (mm) 2150
b. Max. digging depth Flat bottom (mm) 2000
c. Max. digging height (mm) 3400
d. Load over height (mm) 1760
e. Transport height (mm) 1878
f. Ground clearance (mm) 290
g. Boom pivot height (mm) 500
h. Straight wall digging depth (mm) 1134
i. Max. digging radius (mm) 3360
j. Loading reach (mm) 1187
k. Bucket rotation 160 degrees
l. Swing Arc 140 degrees
Specification LW-8 Factory recommends minimum 50 hp.
a. Max. digging depth (mm) 2640 = 104 inches
b. Max. digging depth Flat bottom (mm) 2500 = 98 in.
c. Max. digging height (mm) 3510 = 138 in.
d. Load over height (mm) 2000
e. Transport height (mm) 1952
f. Ground clearance (mm) 290
g. Boom pivot height (mm) 500
h. Straight wall digging depth (mm) 1446
i. Max. digging radius (mm) 3930
j. Loading reach (mm) 1945
k. Bucket rotation 160 degrees
l. Swing Arc 140 degrees
Specification JW-03 and Gulin YW-6
a. Bucket capacity: 1.060 cubic feet.
b. Bucket width: 11 inches at rear and 15 inches across
the face
c. Over-all dimensions (during transportation): H7.5 x L14.7
x W5.2 feet
d. Maximum digging depth: 5.9 feet
e. Maximum digging radius: 9.18 feet
f. Bucket rotating angle: 160°
g. Discharging height: 8.2 feet
h. Extension width (with supporting legs extended): 5.9 feet
i. Weight: 1,339 pounds
Tractors
541-745-0163
38544 Hwy 99W
Corvallis,
OR 97330
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