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John Deere D170 Troubleshooting
The
John Deere D170 lawn tractor was manufactured between 2011 and 2017. The
components of John Deere D170 driveline system: Briggs and Stratton 44P777
4-cycle vertical-shaft V-twin cylinder air-cooled gasoline engine and Kanzaki
Tuff Torq HD K46 belt-driven hydrostatic transmission with infinite forward and
reverse gears.
A 44.2 cubic inches (724 cc) engine has a cylinder bore of 3.12" (79
mm), piston stroke of 2.89" (73 mm), rated power of 26 hp (19.4 kW), and
56.4 Nm (41.8 lb-ft) of peak torque at 2400 rev/min.
Max travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 3.2 mph (5.1
km/h). The John Deere D170 is equipped with a manual steering system,
mechanical shoe brakes, 16x6.50-6 front tires, and 22x9.50-12 rear
tires. The wheelbase is 49" (1240 mm). The tractor is compatible with
the following attachments: a 54" mid-mount 3-blade mower deck with
cutting height of 1.0-4.0" (25-102 mm), 13 cut positions, and mechanical
lift with assist spring, 46" front blade with lift height of 6.5" (160
mm), and 44" front-mount two-stage snowblower with clearing height of
18" (450 mm).
| Engine Troubleshooting |
| Engine will not start or starts up hard |
| Fuel tank is empty - Add gasoline |
| Improper fuel grade - Change gasoline |
| Air trapped in fuel system - Bleed air |
| Defective wiring connection of spark plug - Inspect spark plug wiring connection, change or repair |
| Defective spark plug - Spark plug need to be replaced |
| Clogged fuel filter - Change fuel filter |
| Brake pedal not pushed down - Push the brake pedal down |
| Carburetor is not adjusted - Check carburetor float adjustment |
| Weak cylinder compression - Inspect cylinder block and change worn parts |
| Choke cable is unadjusted or damaged - Replace cable or adjust correctly |
| Cooling fins are plugged - Need to wash or clean |
| Ignition system problems - Test ignition and replace failed parts |
| Defective or stuck throttle cable - Replace or service the cable |
| Clogged air filter - Change or service air filter |
| Dirty or damaged fuel pump - Service or change fuel pump |
| Engine starts and stops suddenly |
| Spark plug is faulty - Change spark plug as required |
| Defective or dirty carburetor - Clean or replace carburetor |
| Faulty ignition coil - Install a new ignition coil |
| Loose or worn valve springs - Change valve springs |
| Valves are stuck - Clean the valves |
| Lack of engine oil - Check and refill engine oil |
| Engine is under excessive load - Load reducing required |
| Cooling fins are plugged - Wash or clean as required |
| Too lean carburetor mixture - Make the correct settings |
| Ignition timing is improper - Set the ignition timing properly |
| Wrong valve setting - Adjust valves as required |
| Low octane fuel - Use proper gasoline |
| Engine is under excessive load - Reduce engine load |
| Lack of engine oil - Checking oil level and add if necessary |
| Wrong adjustment of low idle speed - Correct idle settings |
| Fuel pump is clogged or faulty - Service or change fuel pump |
| Worn crankshaft or main bearings - Repair or replace defective parts |
| Excessive valve clearance - Check and adjust |
| Worn piston rings or cylinder bore - Replace faulty components |
| Dirty or incorrectly adjusted carburetor - Adjust the carburetor correctly or clean it |
| Clogged air filter - Clean or replace air filter |
| Fuel pump is clogged or faulty - Clean or change fuel pump |
| Ignition system is defective - Check ignition and replace faulty components |
| Blown cylinder head gasket - Cylinder-head gasket replacement required |
| Stuck or burned valves - Change or service valves |
| Worn or bent push rod - Replace push rod |
| Faulty cylinder block parts - Change defective components |
| Throttle does not open well - Inspect throttle cable and adjust it |
| Carburetor main jet is improperly adjusted - Adjust it correctly |
| Spark plug is loose or faulty - Re-tighten or change the spark plug |
| Worn, stuck, or burned valves - Replace or service valves |
| Rings, sleeve, or piston are damaged - Replace faulty parts |
| Excessive valve clearance - Adjust valve clearance |
| High engine oil consumption |
| Worn gaskets or seals - Install new components |
| Valve guides or stems are damaged - Valves must be replaced |
| Seized or wear piston rings - Have piston rings replaced |
| Piston or cylinder liner is scored - Check liner and piston, install new components as required |
| Breather hose or pipe is plugged - Replace or service |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission makes noise |
| Bent or unadjusted speed control pedal linkage - Change or adjust linkage |
| Excessive loading - Reduce transmission load |
| Transmission fluid is dirty or fluid level is too low - Pour fresh fluid or add transmission fluid to proper level |
| Damaged or worn components of transmission - After disassembly and inspection, replace defective components |
| Shift linkage is corroded or worn - Lubricate or replace linkage |
| Hydrostatic pump is blocked or defective - Repair or change pump |
| Transmission shift control parts are damaged or misadjusted - Change or adjust correctly |
| Lack of transmission oil supply - Fill the transmission housing with oil |
| Drive sheave is worn or faulty - Change sheave |
| Not adjusted or damaged shifter linkage - Change or adjust linkage |
| Speed control linkage is defective or unadjusted - Adjust or install new linkage |
| Broken transmission gaskets or seals - Seals and gaskets need to be replaced |
| Final drive shaft is leaking - Change shaft seals |
| Transmission housing is cracked - Replace damage housing or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibrates excessively |
| Mower deck drive pulley is worn or dirty - Service or replace pulley |
| Loose or damaged drive belt - Belt needs to be adjusted or replaced |
| Cutting blades are bent or unbalanced - Balance or change blades |
| Blade bolts are not tightened well - Tighten it fast |
| Discharge chute keeps clogging |
| Fast ground speed - Select a lower speed |
| Tall grass - Adjust mower to lower cutting height |
| Reduced engine rpm - Adjust throttle to full opening |
| Cutting height is too low - Change cutting height adjustment |
| Drive belt installed improperly - Install drive belt as required |
| Clogged mower deck - Clean out the mower deck |
| Blades are excessively dull - Blades need to be sharpened |
| Worn or damaged blades - Blades must be changed |
| Mowing speed is too high - Use a slower speed |
| Mower cuts too low - Adjust mower to higher cutting height |
| Filled grass bag - Clean grass bag |
| Blades are scalping the grass |
| Lawn is bumpy or not smooth - Lawn leveling required |
| Cutting level is too low - Adjust mower to higher cutting height |
| High mowing speed - Use a slower speed |
| Improperly leveled mower deck - Adjust the level of mower deck correctly |
| Blades are bent or worn - Install new blades |
| Tires are not correctly inflated - Inflate tires as required |
| Tires are not properly inflated - Inflate tires as required |
| Deck is not leveled correctly - Level the deck properly |
| Blades are too dull - Blades need to be sharpened |
| Blades are defective or worn - Install new blades |
| Deck is plugged with grass - Clean out the mower deck |
| Deck housing is broken - Replace or repair the deck |
| Mower spindle is loose or defective - Repair or replace the spindle |
| Electrical Troubleshooting |
| Battery does not charge |
| Loose or corroded wire connections - Clean or tighten wiring connections |
| Faulty battery terminal connectors - Change terminal connectors |
| Battery bad cell - Replace the battery |
| Low battery output voltage - Recharge the battery |
| Battery runs out quickly - Service charging system or replace battery |
| Disconnected battery cables or bad terminals - Check wiring and clean or replace terminals |
| Battery is drained or worn - Battery needs to be recharged or replaced |
| Battery cables are disconnected or incorrectly connected - Check cables and connect as needed |
| Battery power is low - Charge the battery |
| Incorrectly gapped or worn spark plug - Replace or clean and gap |
| Faulty solenoid or starter motor - Repair starter or replace solenoid |
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| Lawn and Garden Tractors Technical Specs |
