BOXER BHL-225, Manual

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CAUTION
: Do not perform service or maintenance Operations with backhoe raised off the ground. For
additional access to tractor components removes backhoe.
Important
Securely support backhoe and relieve pressure in hydraulic lines prior to performing any service or maintenance operations
on the tractor or backhoe.
CAUTION
: Escaping fluid under pressure can have sufficient force to penetrate the skin, causing serious injury,
before disconnecting lines, be sure to relieve all pressure. Before applying pressure to the system, ensure all connections
are tight and that lines, pipes and hoses are not damaged. Fluid escaping from a very small hole can be almost invisible.
Use a piece of cardboard or wood rather than your hands
to search for suspected leaks. If injured by escaping fluid, seek medical attention immediately. Serious
infection or reaction can develop if correct medical treatment is not administered immediately.
Refer to “lubrication and Maintenance Chart” for quick reference to Maintenance Operations.
CAUTION:
Do not operate the backhoe if the fittings are leaking or if the hoses are damaged. A sudden line
burst could cause the boom, dipper arm or bucket to drop suddenly, causing damage to the tractor or backhoe or
injury to personnel.
CAUTION:
OPERATE THE BACKHOE FROM THE OPERATOR SEAT ONLY.
CAUTION
: Do not stand or walk under a raised backhoe. Accidental movement of control lever or
leak
in hydraulic system could cause boom or dipper arm to drop, causing severe injury.
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Model BHM-195 BHL-225
Structure weight (kg) 540 700
Max digging depth (m) A 1.95 2.25
Max digging radius (m) B 2.9 3.3
Max digging height (m) C 3.17 3.45
Max unloading height (m) D 2 2.3
Stabilizer width (m) 1.7 1.7
Swing angle for boom 180 180
Bucket turning angle 195 203
Bucket turning angle 0.02 0.035
Bucket width (mm) 15L/MIN 25L/MIN
Min. hydraulic flow req. 25L/MIN 40L/MIN
Max. hydraulic flow allowed 13MPA 13MPA
Min. hydraulic press. Allowed. 16MPA 16MPA
Bucket digging force (kg) 1100 1700
Dipper arm digging force (kg) 850 1100
Item Service Service Interval
Hydraulic System Oil Level Check Daily / 10 Hours
Hydraulic System Oil/Filter Replace Every 50 Hours
Tyre Inflation Check Weekly / 50 Hours
Backhoe Pivot Points Lubricate / Grease Daily / 10 Hours
Backhoe Hydraulic Lines, Hoses,
Connections Check for leaks, wear Daily / 10 Hours
Boom, Arm, Swing and Bucket
cylinder rod packing’s
Check for seepage, service as
needed Daily / 10 Hours
Pivot Pin Bolts and Dust Covers Check, replace if missing Daily / 10 Hours
Pin Wear Check, replace if necessary Daily / 10 Hours
Backhoe Mount Hardware Check visually Daily / 10 Hours
Structural Bolts and Nuts Re-torque Every 25 Hours
PROBLEM Possible Cause Correction
Low hydraulic fluid level
Check and replenish hydraulic
fluid.
Hydraulic hoses connected
improperly Check and correct hydraulic hose
connections.
Stabilizer Legs, Swing, Boom, Dipper
Arm and Bucket Cylinders not
working Hydraulic hoses to / from control
valve blocked Check for damage (kinked) hoses,
etc.
Backhoe control valve or tractor
main relief valve stuck open
Check system pressure, repair or
replace relief valve. Refer to the
tractor Operator’s Manual.
Lower system pressure supplied
from hydraulic pump Check system pressure. Repair or
replace pump.
Control valve linkage broken Inspect. Repair as required.
Quick disconnected coupler(s) are
not fully connected or “flow Check”
Check coupler connections.
Replace coupler(s) if necessary.
PROBLEM Possible Cause Correction
Stabilizer Legs, Swing, Boom, Dipper
Arm and Bucket Cylinders not
working
Hydraulic Hose or tube line blockage
Check for evidence of damage to
hoses or tube lines that would block
flow of oil between cylinders and
control valve
Cylinder piston assembly defective
(not sealing)
Check cylinder for internal leakage as
described in service section under
cylinder leakage tests.
Control Valve blockage
Inspect for blockage. Disassemble
valve if necessary.
Safety lock pins (2) not removed Remove and store safety pins.
Stabilizer legs safety clip not released Release the clip
Cylinders operate in wrong direction
relative to control valve lever
position.
Hydraulic Hoses connected
incorrectly.
Correct hydraulic hoses connections.
Low hydraulic fluid level Check and replenish hydraulic fluid.
Cold hydraulic fluid
Allow hydraulic system to warm up
to operating temperature