How to Remove Air Lock in Diesel Power Weeders (RK-173F & 186F)
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7HP & 9HP Power Weeders & Rotary Tillers
Direct gear-drive petrol & diesel weeders for sugarcane, cotton, and horticulture. 32-blade rotary with state subsidy invoice.
Running a diesel power weeder completely out of fuel introduces air pockets into the high-pressure fuel injection circuit. Simply refilling the diesel tank will not start the engine until the air lock is bled.
Step-by-Step Air Bleeding Procedure
- Fill the Tank with Clean Diesel: Ensure minimum 3 liters of diesel is in the tank so gravity creates positive head pressure.
- Loosen the Fuel Filter Bleeder Screw: Locate the 10mm bolt on the fuel filter base. Loosen it 2 turns until diesel flows without air bubbles or frothing, then retighten.
- Loosen the High-Pressure Line at the Injector: Using a 17mm open spanner, loosen the union nut connecting the steel delivery pipe to the fuel injector on top of the cylinder head.
- Crank with Decompression Engaged: Push down the decompression lever and pull the recoil starter vigorously 4–6 times until pressurized diesel spurts out of the cracked fitting.
- Retighten & Start: Tighten the 17mm nut firmly. Engage decompression, pull the recoil smoothly, let decompression pop back up, and the engine will immediately fire.
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