TM 10-3930-659-20 4-2. EXPLANATIONS OF COLUMNS. The columns in Tables 4-1, 4-2, and 4-3 are defined as follows: (1) MALFUNCTION.  A visual or operational indication that something is wrong with the forklift truck. (2) TEST OR INSPECTION.  A procedure to isolate the problem in a component or system. (3) CORRECTIVE ACTION.  A procedure to correct the problem. 4-3. TROUBLESHOOTING SYMPTOM INDEX. Troubleshooting Procedure Page MECHANICAL TROUBLESHOOTING AXLE Differential: Noise, Excessive .......................................................................................................................... 4-17 Overfilled With Hydraulic Fluid ..................................................................................................... 4-17 Hydraulic Fluid Overfilled in Differential .................................................................................................... 4-17 Noise, Excessive: Axle  ............................................................................................................................................. 4-17 Differential.................................................................................................................................... 4-17 BRAKES Brakedrum Overheats, Parking Brake ....................................................................................................... 4-19 Chatter...................................................................................................................................................... 4-18 Drag.......................................................................................................................................................... 4-18 Hissing Noise With Brake Pedal Depressed and Engine Stopped.............................................................. 4-18 Nonexistent   ............................................................................................................................................. 4-17 Parking Brake: Brakedrum Overheats................................................................................................................... 4-19 Indicator Light Will Not Light When Parking Brake is Applied ....................................................... 4-20 Will Not: Apply..................................................................................................................................... 4-20 Hold ...................................................................................................................................... 4-19 Poor .......................................................................................................................................................... 4-17 Pressure Warning Light Remains Lit ......................................................................................................... 4-19 COOLING SYSTEM Engine: Overheats..................................................................................................................................... 4-14 Runs Cold..................................................................................................................................... 4-15 4-2

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