If you own a 2024 Kioti DK5320SE, your first 50-hour service is an important milestone. This is when the tractor’s initial fluids, filters, and any break-in material should be replaced. It is also a great time to check for leaks, loose fittings, and other small issues before they turn into big ones.
This guide covers the complete 50-hour maintenance I performed on my DK5320SE, what I learned along the way, and what I broke so you can avoid doing the same thing.
Overview: What’s Included in the 50-Hour Service
According to Kioti’s maintenance schedule, the 50-hour service calls for replacing the hydraulic oil filter and the hydrostatic transmission (HST) filter.
That is technically all the manual lists, but I recommend going further and also:
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Changing the engine oil and filter
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Replacing the fuel filter
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Changing the front axle oil to gear lube
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Checking loader mount bolts and wheel lug torque
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Cleaning, greasing, and checking all fluid levels
These extra steps cost very little and go a long way toward keeping your tractor reliable for the long haul.
Draining and Refilling the Engine Oil
The DK5320SE has two drain plugs because the driveshaft runs through the middle of the oil pan. Use a 17 mm socket to remove both and drain the oil completely. Each plug has a sealing washer that must be reinstalled.
Once drained, I replaced the oil filter with OEM part number E6201-32443. Before installing the new filter, apply a small amount of clean oil to the gasket for a proper seal.
The engine takes 1.95 gallons, or about 7 quarts and 25 ounces, of 15W-40 oil. I used Kioti-branded oil for consistency.
Fuel Filter and Water Sensor
The fuel filter sits above the oil fill cap and includes a water sensor on the bottom. Remove the old filter carefully, transfer the sensor to the new one, and make sure the gasket is properly seated.
Before starting the engine, use the built-in priming pump to fill the new filter. Loosen the small bleeder screw on top of the housing and pump until fuel flows out steadily. Tighten the screw once the air is out. Expect some fuel to spill, so keep rags and brake cleaner handy.
Hydraulic and HST Filters
The DK5320SE has two hydraulic filters:
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The hydraulic oil filter on the right side of the tractor
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The hydrostatic transmission (HST) filter on the left side near the fuel tank
Both filters were extremely tight from the factory, so use a strong filter wrench and have a drain pan ready. You will lose some fluid when removing them.
The owner’s manual lists the HST filter as part number T4125-38021, but that was incorrect on my 2024 model. The correct filter is TD24-0257A. Always check what is actually on your tractor before replacing parts.
After installing the filters, check the dipstick under the rear remotes and top off with the correct Kioti hydraulic fluid.
Front Axle Gear Oil Change
The manual does not call for changing front axle oil at 50 hours, but I recommend doing it. From the factory, the fluid often smells like hydraulic oil instead of gear oil.
Each axle has a drain plug on the back and a filler plug on top. I used Amsoil Severe Gear 80W-90 synthetic gear lube, which meets the required SAE 90 specification. Capacity is about 1.48 gallons total.
Remove the two small bleeder plugs on top of the bevel gear housings while filling to allow air to escape, then reinstall once the oil reaches the filler hole.
Checking Loader Mounts and Wheel Torque
I also checked all the loader mounting bolts and wheel lug torque.
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Loader bolts use a 22 mm socket. Some are difficult to reach behind hydraulic hoses, so a 7/8 inch box wrench helps.
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Wheel lugs should be torqued to 166 ft-lb as listed in the owner’s manual.
Verifying these takes only a few minutes and helps prevent problems down the road.
Grease Points and Cabin Cleanup
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Grease all loader pins, axle fittings (top and bottom), and steering pivots.
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Blow dust and debris out of the cab with compressed air.
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Check lights and safety switches.
A few small details make a big difference in comfort and performance.
Lessons Learned and Tips
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Always verify filter part numbers by comparing to what is actually installed
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Change the front axle oil early for peace of mind
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Keep extra hydraulic fluid on hand for top-offs or spills
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A refillable brake clean sprayer saves time and money
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Do not overtighten filters; the factory already does that
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Plan for cleanup time as part of the job