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Home / Lawn and Garden Tractors / John Deere Lawn Tractors / John Deere D125

John Deere D125 Maintenance

The John Deere D125 lawn tractor was manufactured from 2014 to 2017. The JD D125 powerline components: Briggs and Stratton 40R877 4-cycle V-twin cylinder OHV air-cooled gasoline engine and Tuff Torq T40 belt-driven hydrostatic transmission with infinite forward and reverse gears.

A 40.1 cubic inches (655 cc) engine has a cylinder bore of 2.97" (75 mm), piston stroke of 2.89" (73 mm), and rated power of 20 hp (14.9 kW). Max. forward speed - 5.5 mph (8.8 km/h), maximum reverse speed - 3.2 mph (5.1 km/h).

The John Deere D125 is equipped with a manual steering system, disc brakes, 15x6.00-6 front tires, and 20x8.00-8 rear tires. The wheel base is 49" (1240 mm). The lawn tractor is compatible with the following attachments: 42" mid-mount 2-blade mower deck with cutting height of 1-4" (25-102 mm), 43.25" front-mount 2-stage snowblower with clearing height of 18" (450 mm), and 46" front blade with mechanical lift system.

Refill Capacities
Engine oil capacity, qts (L) 2.0 (1.9)
Transmission fluid capacity, qts (L) 2.45 (2.3)
Fuel tank capacity, gal (L) 2.4 (9.1)

Recommended Oil and Fluid
Engine oil type Turf-Gard, Plus-4, SAE 10W-30, 10W-40, 5W-30. API Service category CH or higher
Transmission fluid type SAE 10W-30, 5W-50 Synthetic Oil

Service Intervals
Check fuel level Every 10 hours
Check engine oil level Every 10 hours
Clean air intake screen Every 10 hours
Check tire pressure and brakes Every 10 hours
Check and tighten loose hardware Every 10 hours
Lubricate front axle pivot Every 25 hours
Lubricate front wheel spindles and wheel bushings Every 25 hours
Check transmission fluid Every 25 hours
Change engine oil Every 50 hours
Replace engine oil filter Every 50 hours
Clean air filter precleaner (if equipped) Every 50 hours
Check air filter element Every 50 hours
Clean engine cooling fins Every 50 hours
Replace fuel filter Every 50 hours
Clean spark plug Every 50 hours
Check and clean battery terminals Every 50 hours
Sharpen or replace mower blades Every 50 hours
Check and adjust mower drive belt Every 50 hours
Clean mower deck Every 50 hours
Check and level mower deck Every 50 hours
Lubricate mower pivot points Every 50 hours
Replace spark plug Every 100 hours
Charge battery Every 100 hours
Check engine idle speeds Every 100 hours
Check carburetor adjustment Every 100 hours
Replace air filter precleaner (if equipped) Every 200 hours
Replace air filter element Every 200 hours
Change transmission fluid Every 200 hours
Check and adjust valve clearance Every 200 hours

Replacement Parts
Engine oil filter part number AM125424
Engine fuel filter part number AM116304
Engine air filter part number MIU13963
Spark plug part number M78543, MIU11020
Mower blade part number GX22151
Traction drive belt part number GX20006
Mower drive belt part number GX20072

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