Category Archives: FUSO 4M4

• The air cleaner is a single element type. • When the engine slows down below the predetermined speed, the level of vacuum in the air cleaner changes and causes the unloader valve to vibrate. Vibration of the unloader valve allows the air cleaner to automatically discharge any water and dust that has accumulated inside.… Read More »

Inspection procedure Inspection: Pressure cap (1) Pressure cap valve opening pressure • Replace the pressure cap if the measured value deviates from the standard value range. (2) Inspection of vent valve • Before starting the inspection, check the level of coolant in the reservoir tank. • Run the engine at full speed. Stop the engine… Read More »

Inspection and cleaning procedure •Inspection: Automatic cooling fan coupling Make an inspection of the following points. Replace the automatic cooling fan coupling if defective. Check that: • the hydraulic oil sealed inside the coupling is not leaking; • the coupling does not make any abnormal noise or rotate unevenly due to defects in the inside… Read More »

Inspection procedure Inspection: Air leakage from radiator • Connect a hose and radiator cap tester to the upper tank. • Plug the lower tank and put the entire radiator into a tank filled with water. • Apply a specified air pressure using radiator cap tester, and check for any air leakage. • If air leakage… Read More »

Installation procedure •Installation: Upper radiator hose Connect the upper radiator hose with its marking opposed to the buildup of the radiator. •Installation: Water hose Connect the water hose with its marking opposed to the buildup of the adapter.    

• Presence of air or exhaust gas in coolant accelerates corrosion of the cooling system components. To prevent this, carry out air/ gas leakage tests in accordance with the following procedure. • Remove the pressure cap. • Run the engine until the coolant temperature rises to approximately 90°C. • If air bubbles appear continuously through… Read More »

• With the pressure cap removed and the coolant temperature at 90°C, let the engine idle in order to bleed air completely out of the cooling system. • After air bleeding is completed, refill the reservoir tank with coolant as needed.

• Using the radiator for extended periods of time without cleaning can increase chance of rust and scale formation, which may cause engine overheating. The cooling system must be cleaned periodically. 3.1 Draining of coolant • Before draining the radiator, slowly loosen the pressure cap covered with a shop towel or the like and lower… Read More »

• Visually check the belts for possible cracks and damage. • If any faults are found, replace the belts.