what causes a chain to break on a l779 skid steer
Troubleshooting
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NOTE: Refer to repair manual for specifications, testing, removal and installation Note: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair manual for specifications, testing, removal and installation Note: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair transmission for specifications, testing, removal and installation NOTE: Refer to repair transmission for specifications, testing, removal and installation Notation: Refer to repair transmission for specifications, testing, removal and installation Annotation: Refer to repair transmission for specifications, testing, removal and installation Annotation: Refer to repair manual for specifications, testing, removal and installation Note: Refer to repair transmission for specifications, testing, removal and installation Notation: Refer to repair manual for specifications, testing, removal and installation Note: Refer to repair manual for specifications, testing, removal and installation Notation: Refer to repair transmission for specifications, testing, removal and installation NOTE: Refer to repair transmission for specifications, testing, removal and installation � Drive chain failure - Audit the drive chain and connecting link. Supersede any damaged parts. Annotation: Refer to repair transmission for specifications, testing, removal and installation. NOTE: Refer to repair manual for specifications, testing, removal and installation. NOTE: Refer to repair transmission for specifications, testing, removal and installation. Notation: Refer to repair manual for specifications, testing, removal and installation. Note: Refer to repair transmission for specifications, testing, removal and installation. Notation: Refer to repair transmission for specifications, testing, removal and installation. Annotation: Refer to repair manual for specifications, testing, removal and installation. Notation: Refer to repair manual for specifications, testing, removal and installation. NOTE: Refer to repair manual for specifications, testing, removal and installation. NOTE: Refer to repair manual for specifications, testing, removal and installation. NOTE: Refer to repair manual for specifications, testing, removal and installation. Notation: Refer to repair manual for specifications, testing, removal and installation Annotation: Refer to repair transmission for specifications, testing, removal and installation ii. The next footstep would be to check the fuse in the fuse box. This is a 10 amp fuse (brown wire with yellow tracer). If the fuse is proficient keep to step 3. 3. The next affair to check would exist your switch in the handle. To check this you will demand to; make sure the car is turned off, remove the seat, unplug the wires that come out of the bottom of the control lever on the LH side. Next connect the negative from an ohm meter to the dark-green wire and test the rocker switch with by pressing one side of the switch and seeing if there is continuity ane of the other wires. Exercise the aforementioned for the other side of the switch. If the switch is skillful, and so there is a short in your harness. Trace out and fix short or broken wire. If the switch is faulty, supercede with a new one. 4. If you lot accept power going back to your solenoids on your valve simply the auxiliary hydraulics still won't work, check the coils for resistance to see if they are inside spec. They should accept 3 to five ohms resistance. If they exercise not fall inside this spec then it is faulty and demand replacing. 2. Adjacent, bank check to see if you have power at your starter. Using a exam light connect the clip end of the exam lite on a proficient make clean basis on the frame or engine surface and apply the point end to examination the stud or bolt on the engine starter where the positive cablevision connects. 3. Next yous will need to ostend that you have power going through the starter and solenoid. With the test light, check the starter where the ignition wire connects on. The ignition wire is commonly white. 4. If yous have ability coming out of the solenoid, you will have to repeat this procedure for each of the following connections until you reach the dash panel. 5. Next yous volition have to test the ignition switch for power. To do this you will have to remove the dash panel to expose the dorsum of the ignition switch. Using the test lite, cheque to see if you have ability coming into the switch through the white wire (Terminal 30). If y'all do, then proceed to step f. vi. Next, turn the ignition to the run position. With the test light, bank check to see if you lot have ability coming to the blackness with white tracer wire (concluding ACC). If yous practice than proceed to step g. vii. Making sure the wires on the ignition switch do not ground out, get out the ignition turned to the run position and locate and open up the fuse panel located in the engine compartment of the machine. Using the test light, exam to see if at that place is power coming into the fuse panel purchase testing the main screw. Then exam both sides of each fuse for power and where each wire connects. NOTE: Refer to repair manual for specifications, testing, removal and installation Note: Refer to repair transmission for specifications, testing, removal and installation Note: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair transmission for specifications, testing, removal and installation Annotation: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair manual for specifications, testing, removal and installation NOTE: Refer to repair manual for specifications, testing, removal and installation
Engine
Hydraulic & final bulldoze
Electric
Controls
Q: I have difficulties starting my engine in my loader, what could be the cause? A: Here are a few things you can bank check:
� Low cranking speed - Check the charge in the bombardment. Check starter. Repair or replace
� Wrong pump timing - Bank check the pump timing
� Restricted fuel filter - Check and flush or replace the fuel filter clear.
� Contaminated fuel - Check for water in the fuel
� Depression pinch - Check the engine compression
� Air in system - Bank check for air leaks on the suction side of the system
Q: I have fuel mixed into my lubricant oil, why? A: Here are a few possible explanations to this:
� Injection pump�s plunger worn - Supervene upon pump element or pump
� Injection pump cleaved - Replace
Q: I accept high oil pressure, what causes this? A: Hither are a few possible explanations to this:
� Relief valve defective � Replace
� Engine oil insufficient - Replenish
Q: I have low oil pressure, what causes this? A: Hither are a few possible explanations to this:
� Engine oil bereft � Furnish
� Oil strainer clogged � Clean
� Relief valve stuck with dirt � Clean
� Relief valve spring weakened or broken � Replace
� Excessive oil clearance of crankshaft bearing � Supplant
� Excessive oil clearance of creepo pivot begetting � Supercede
� Excessive oil clearance of rocker arm bearing � Supercede
� Oil passage clogged � Clean
� Oil pump defective � Replace
� Dissimilar type of oil - Utilize the specified oil type
Q: I have h2o mixed into my lubricant oil, why? A: Hither are a few possible explanations to this:
� Caput gasket lacking � Supplant
� Cylinder block or cylinder head flawed - Supervene upon
Q: My battery chop-chop discharges, what can cause this? A: Here are a few possible explanations to this:
� Battery electrolyte bereft - Furnish distilled water
� Fan belt slips - Suit belt tension or modify
� Wiring disconnected � Connect
� Rectifier defective - Test, supplant
� Alternator defective - Test, repair, replace
� Battery defective - Test, supervene upon
Q: My engine does not develop full ability, what could exist the cause of this? A: Here are a few possible explanations to this:
� Unsuitable fuel used - Use the specified fuel
� Clogged air cleaner - Clean, replace
� Fuel line, filter obstacle - Test, repair, replace
� Incorrect injection timing � Adjust
� Engine�s moving parts seem to exist seizing - Repair or replace
� Uneven fuel injection - Repair or supercede injection pump
� Deficient nozzle injection - Repair or supervene upon nozzle
� Pinch leak - Replace head gasket, tighten cylinder head bolt, glow plug and nozzle holder
Q: My engine keeps overheating, why? A: Here are a few possible explanations to this:
� Fan belt broken or elongated - Change or adjust
� Cooling h2o insufficient - Check for leaks, replenish
� Radiator net and radiator fin chock-full with dust � Make clean
� Inside of radiator corroded - Make clean or replace
� Cooling water flow route corroded - Clean or replace
� Radiator cap defective � Replace
� Overload running - Loosen the load
� Head gasket lacking � Replace
� Restricted exhaust - Check
� Wrong injection timing � Adjust
� Water pump failure - Exam, repair, replace
� Thermostat failure - Test, replace
� Low on engine oil - Cheque, replenish if necessary
� Collapsed hose - Supervene upon
Q: My engine revolution is not smooth, what should I look for? A: Here are a few things you can bank check:
� Fuel filter clogged or muddied - Make clean or change
� Air cleaner clogged - Clean or modify
� Fuel leak due to loose injection pipage retaining nut - Tighten nut
� Injection pump malfunctioning - Repair or replace
� Wrong nozzle opening pressure � Adjust
� Injection nozzle stuck or clogged - Repair or supersede
� Fuel overflow pipe clogged � Clean
� Governor malfunctioning - Repair
Q: My engine revolution is non smooth, what should I look for? A: Here are a few things you tin check:
� Fuel filter clogged or dirty - Make clean or modify
� Air cleaner chock-full - Clean or change
� Fuel leak due to loose injection pipe retaining nut - Tighten nut
� Injection pump malfunctioning - Repair or replace
� Incorrect nozzle opening pressure level � Adjust
� Injection nozzle stuck or chock-full - Repair or replace
� Fuel overflow pipage chock-full � Make clean
� Governor malfunctioning - Repair
Q: My engine starts and stops, what could be the cause? A: Hither are a few things y'all tin check:
� Fuel starvation - Check and flush make clean restricted fuel lines or fuel filter
� Contaminated fuel - Check for water in the fuel
� Restricted air intake - Check for restrictions in the air intake
� Engine overheating - Check cooling system
� Air in system - Check for air leaks on the suction side of the system
Q: My engine will not start, what should I cheque for? A: Here are a few things you can check:
� Low fuel - Replenish fuel
� Air in the fuel - Vent air
� H2o in the fuel - Change fuel and repair or replace the system
� Fuel pipage clogged � Clean
� Fuel filter clogged - Clean or change
� Air filter dingy - Clean or supersede
� Excessively high viscosity of fuel or engine oil at low temperature - Use the specified fuel or engine oil
� Fuel with depression octane number - Use the specified fuel
� Fuel leak due to loose injection pipe retaining nut - Tighten nut
� Incorrect injection timing � Accommodate
� Fuel cam shaft worn - Replace
� Injection nozzle chock-full � Clean
� Injection pump malfunctioning - Repair or supersede
� Seizure of crankshaft, camshaft, piston, cylinder liner or bearing - Repair or supplant
� Compression leak from cylinder - Replace caput gasket, tighten cylinder head bolt, glow plug and nozzle holder
� Improper valve timing - Right or supervene upon timing gear
� Piston ring and liner worn � Replace
� Excessive valve clearance � Accommodate
� Faulty starter switch - Examination, repair or supervene upon.
� Depression or weak battery - Charge, test, supervene upon.
� Irregular or faulty fuel supply - Test fuel pump. Repair or replace
� Glow plugs not heating - Test, repair, supervene upon
� Starter malfunctioning - Repair or replace
Q: My loader uses excessive lubricant oil, what causes this? A: Hither are a few possible explanations to this:
� Piston rings gap facing the same direction - Shift gap direction
� Oil ring worn or stuck � Replace
� Piston band groove worn � Replace
� Valve stalk and guide worn � Supersede
� Crankshaft bearing and creepo pin begetting worn � Replace
� Engine oil level too high - Drain to proper level
� Leaking cylinder head gasket � Supersede
� Chock-full return hole of oil ring - Audit, repair, replace
� External oil leak - Repair, supplant
Q: My starter does not plow over, what could be the problem? A: Here are a few things yous tin bank check:
� Bombardment discharged - Charge, test, replace.
� Cardinal switch malfunctioning - Test, supercede
� Wiring disconnected - Connect
Q: The exhaust coming out of my loader is either white or blue, what might be the cause? A: Here are a few possible explanations to this:
� Excessive engine oil - Reduce to the specified level
� Low grade fuel used - Used the specified fuel
� Fuel filter clogged � Alter
� Air cleaner clogged - Clean or change.
� Excessive angle operation - Work on more level ground or practise not stay on an angle for long lengths of fourth dimension
� Inoperative or no thermostat - Test, replace
� Coolant in cylinders - Examination, repair
� Low cylinder compression - Test, repair
� Worn or scored piston or rings - Repair, supercede
� Valve guides worn - Repair, supercede
Q: I take no drive on one side, what should I look for? A: Here are several things you should check:
� Drive motor sprocket failure - Audit the drive sprocket and splines. Replace parts every bit required.
� Bulldoze motor or hydrostatic arrangement failure - Refer to the hydrostatic drive department. Diagnose and brand repairs as required.
Q: I accept no hydraulic power (there is no menstruum from the gear pump). What Should I exercise? A: Here are a few things you should check:
� Reservoir low on oil - Check for leaks. Make full the reservoir to the proper level with recommended oil.
� Adapter kit betwixt engine and tandem pump failure - Inspect and replace the damaged parts as required. Check for proper alignment.
� Gear pump non functioning - Audit, examination and replace damaged parts if needed.
� Splined coupling failure in the hydrostatic pump - Audit coupling for sheared splines. Also cheque pump shaft bearings.
Q: I have no hydraulic power, just I have full flow from gear pump. What Should I do? A: Here are a few things you should bank check:
� Reservoir low on oil - Cheque for leaks. Make full the reservoir to the proper level with recommended oil.
� Control linkage disconnected or binding - Audit, adjust or supercede parts.
� Auxiliary hydraulics engaged - Undo the switch.
� Relief valve failure or out of adjustment - Cheque pressure. Adjust or repair as required.
Q: My terminal drive is noisy, what could exist causing that? A: There are several possible causes for the noise:
� No lubricating oil - Check oil level. Add recommended oil to correct level.
� Axle has too much terminate play. (Bearing pre-load) - Check and suit the bearing pre-load on the axle begetting.
Q: My hydraulic cylinders volition not support a load, they "leak" down, what causes this? A: There could exist several causes for this:
� Control valve spools not centering - Check command linkage and control valve spool bound centering devise.
� Cylinder seal(south) failure - Visually bank check for leakage, test if necessary.
� Load check valve not functioning - Audit, exam and replace damaged parts if needed.
� External leak between control valve and cylinders - Inspect and repair.
Q: My wheel studs keep shearing off, why is this happening and what can I exercise to foreclose this from happening? A: You should cheque the wheel nuts to see if they are loose, and if and then, supersede the bike studs. We recommend y'all check wheel nut torque daily. Torque cycle nuts to specification.
Q: What can cause the hydraulic oil to overheat? A: There are several possible reasons for this:
� Reservoir depression on oil - Check for leaks. Fill the reservoir to the proper level with recommended oil.
� Oil libation plugged or dirty - Clean the cooling fins.
� Auxiliary hydraulics engaged - Disengage.
� Cooling fan damaged or inoperative - Cheque fan for whatsoever breakage and ensure the drive chugalug is at the right tension.
� Engine rpm too depression - Bank check engine RPM and adjust if needed.
� Temperature sender lacking - Exam and replace if necessary.
� Relief valve failure or out of adjustment - Check force per unit area, arrange or supplant.
� Incorrect type of hydraulic fluid - Replace with recommended oil.
Q: What causes lubrication oil leaking through the filler sabbatical cap? A: There are several possible reasons for this:
� Lubricating oil level too high - Check the oil level and drain to proper level if necessary.
� Bulldoze motor shaft seal leakage - Inspect and repair damaged parts.
Q: Why do my bicycle studs keep stripping? A: The wheel studs keep stripping considering the bicycle nuts may be over tightened. In order to ready this, replace the wheel studs. Check wheel nut torque daily. Torque wheel basics to specification.
Q: Why does my boom ascent slowly at total rpm? A: There are several possible explanations for this:
� Reservoir low on oil - Cheque for leaks. Fill the reservoir to the proper level with recommended oil.
� Command linkages loose or worn - Inspect, adjust or replace parts.
� Auxiliary hydraulics engaged - Disengage the switch.
� Lifting more than than rated capacity - Reduce the load.
� Engine rpm too low - Bank check engine rpm and reset.
� Relief valve failure or out of adjustment - Check force per unit area. Adjust or repair as required.
� Cylinder seal(southward) failure - Visually check for leakage, examination if necessary.
� Internal leakage in the control valve - Audit and do pressure test on the control valve and repair as required
� Limiter on command cantankerous shaft misadjusted
Inspect, adjust or replace worn parts.
Q: Why does my hydraulic drive act erratically? A: There are a few possibilities for this:
� Reservoir low on oil - Check for leaks. Fill the reservoir to the proper level with recommended oil.
� Control linkages loose or worn - Inspect, adjust or replace parts.
� Air in hydraulic system - Check for leaks betwixt the oil reservoir and pump.
� Load cheque valve not functioning - Test, inspect and replace damaged parts.
� Command valve spool jump return mechanism not functioning - Inspect and supplant damaged parts if needed.
Q: My nail controls seem to be stiff, what tin I practise to loosen it? A: Here are a few things you lot can effort:
� Cable wear � Replace
� Pivot clothing - Supervene upon parts
� Control valve wear - Test, repair, replace
Q: My brake will non agree, what tin cause this? A: Hither are a few possible reasons for this:
� Service plunger on restriction valve open up - Inspect and service
� Brake disc clothing or damage - Repair, supercede
� Cable could exist broken or stretched - Test, repair, supplant
Q: The aux (electrical) is non functioning. What should I do? A: one. Beginning determine if in that location is power going to the coils on the valve. To practice this, with the ignition turned to the "RUN" position (exercise not start), and the wires unplugged from the auxiliary coils on the valve, test with a test light to encounter if y'all take power going to them when you rock the switch on the handle. When you push button the switch on 1 side you should have power going to one coil, and when the switch is pushed to the other side you should have power going to the other coil. If no ability is going to the roll keep to step 2.
Q: When I turn my key, I have no ability. A: i. First, brand sure you lot take a fully charged battery. This can be done by testing it with a volt meter. You should have around 12 volts.
Q: My auxiliary is inoperative (solenoid control type), what can I do? A: Here are a few things you lot can endeavor:
� Blown fuse - Examination, replace
� Switch (s) failure - Test, replace
� Aux. valve malfunction - Test, repair, supersede
� Electrical brusque - Examination, repair, replace
� Bad electrical ground - Examination, repair, replace
Q: My boom controls are inoperative, what can cause this to happen? A: Hither are a few possible explanations for your problem:
� Damaged cables, linkage � Supplant
� Condom switch(s) - Accommodate, supersede
� Bad electrical ground � Repair
� Blown fuse � Supersede
� Valve lock malfunction - Replace parts
� Low hydraulic oil � Replenish
� No oil pressure - Make repairs
Q: My smash operation is wearisome, what tin I do to right this? A: Hither are a few things y'all can check:
� Reservoir low on oil - Cheque for leaks. Fill the reservoir to the proper level with recommended oil.
� Cable linkage binding - Replace, adjust
� Aux. hydraulics engaged � Disengage
� Engine RPM depression � Adjust
� Control valve relief - Cheque pressure, replace if necessary.
� Cylinder seal, harm - Test, repair or replace
� Anti-cavitation check valve spring broken - Supplant.
� Internal leak in pump due to wear - Check pump flow and repair or supervene upon equally necessary.
Q: My loader creeps and will not center, what causes this and how tin can I prepare information technology? A: Here are a few things you can do:
� Neutral detent out of adjustment - Accommodate as needed.
� Worn, loose linkage - Replace, tighten parts
� Binding of jump bushing in spring box - Align spring box with linkage.
� Command levers binding or rubbing with safe shields or insulation - Adapt.
� Command lever bearings binding in lever assembly - Inspect, supersede or make clean as required.
Q: My loader is not tracking straight, what should I look for? A: Here are a few things y'all can check:
� Limiter stops need aligning � Arrange
� Binding linkage - Repair, supervene upon
� Hydrostatic failure - Repair, replace
Q: The brakes on my loader won�t release. What can I practise to fix this? A: Here are a few things you can endeavour:
� Blown fuse � Supervene upon
� Safety switch malfunction - Adjust, replace
� Lack of hydrostatic charge � force per unit area, test, repair
� Brake valve failure - Repair, replace
Q: What causes the steering to exist "jerky" or "jumpy"? A: Here are a few things you can check:
� Worn, loose linkage � Supercede
� Binding linkage - Repair, supervene upon
� Linkage adjustment � Adapt
� Depression accuse force per unit area - Repair, replace
Source: http://thomasloaders.com/Troubleshooting1.asp
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