910K Model (L22 Series) Maintenance Guide: These Three Nodes Determine Equipment Lifespan!

Initial 500 Hours: New Equipment "Running-in" Maintenance, Laying a Solid Foundation is Key

The transfer drive requires replacement with TDTO-grade oil, with a volume of 3.2L (0.85 gal). The mark "*" indicates the dry-fill volume, which must be added strictly in accordance with standards—both overfilling and underfilling can damage the equipment.

The front and rear differentials and final drives also need simultaneous oil changes: each differential (Diff) requires 7.5L (1.98 gal) of oil, and each hub requires 1.3L (0.34 gal) of oil. Remember to keep the oil volume consistent in the front and rear symmetric parts.

✅ Transfer Drive Parts List

• Drain Plug: 385-3599 (seal included – ready to install)

• Fill Plug: 499-2184 (seal included – no extra parts needed)

• Level Check Plug: 464-9487

• Matching O-Ring: 6V-3922 O-Ring (seals the plugs above)

✅ Front/Rear Differential Parts List

• Front Differential: 3 x 385-3599 (seal included) + 385-3600 (seal included)

• Rear Differential: 2 x 385-3599 (seal included) +  385-3600 (seal included)

✅ Front/Rear Final Drive Parts List

Each final drive requires 1 x 385-3599 (seal included) – just replace the old plug directly.

Every 500 Hours: "Golden Period" for Routine Maintenance, Synchronous Renewal of Multiple Systems

First, take care of the lubrication and power systems: replace the lubricator with 452-6006 basic application grease, focusing on sufficient filling of rotating joints and bearings; change the engine oil with 8.8L (2.32 gal) of specified oil, matched with the 7W-2326 filter element. After replacement, let the engine idle for 5 minutes to ensure full oil circulation.

The filtration system is the "heart protection net" and must be replaced: use both the 1R-1804 main fuel filter and 441-511 secondary fuel filter; replace the 528-0585 main air filter and 421-5479 hydraulic filter simultaneously. Don't forget the cab air filters—the 270-9018 fresh air filter and 313-2458 recirculation air filter—after all, the operator's comfort is also important.

Every 1000 Hours: "Intensive Period" for In-depth Maintenance, Repeat Basics + Strengthen Effects

At 1000 hours, maintenance is straightforward: repeat the initial 500-hour core checks and rereplace the transmission system's oil and seals. This "foundation-strengthening" step is critical for heavy-duty equipment, effectively reducing transmission jams and power loss.

• Transfer Drive Oil Change: TDTO 3.2L (0.85gal)

• Front & Rear Differential + Final Drive Oil Change:

  • Diff: 7.5L (1.98gal) per unit

  • Hub: 1.3L (0.34gal) per unit

• Plugs/O-Rings:

  • Transfer Drive / Front & Rear Differential: 2 pcs 6V-6228 O-Ring + 152-6144 Plug

  • Front & Rear Final Drive: 1 pc each (O-Ring/Plug, as above)