Troubleshooting
8Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| AIR IS NOT BUILDING UP MORE THAN 6.0 BAR WHILE RUNNING OR AIR DROPS DOWN TO 4.5 BAR WHEN VEHICLE IS PARKED | Leak in circuit between compressor delivery and system protection valve inlet. | Check lines & all joints. Rectify/replace hose assy if damaged. |
| AIR IS NOT BUILDING UP IN BOTH THE GUAGES | Heavy external leak from the valve assembly. | Overhaul assembly |
| DELAY IN BUILDING UP SYSTEM PRESSURE | Leak through element 21 or 22. Valve not functioning. Leak through exhaust or unused ports not plugged. Defective air gauge | External leak from the valve assembly. Overhaul assembly. Plug unused ports left open. Replace defective air gauge |
| BRAKE BINDING - BOTH FRONT & REAR BRAKES | Set correct free play. Overhaul assembly. Check pipe lines & all joints. Rectify/replace hose assy if damaged. Reset if required. Replace defective pipes and hose assy. Clean pipe / fittings | |
| BRAKE BINDING. (REAR BRAKES ONLY) | Hand brake element in FCPV not functioning. Leakage between HBV delivery & SBA port circuit. Misalignment between Spring Brake Actuator/Brake Chamber and slack adjusters. Excess clearance between Drum and Brake lining. Choked or kinked in pipe lines/hose. Blockage in pipes/fittings at dual brake valve delivery lines. Defective shoe return spring. | Replace the shoe return spring |
| PRESSURE DROPS DOWN TO ZERO WHEN VEHICLE IS PARKED | Leak through exhaust. Leakage from FCPV delivery line circuits with internal in Four Circuit Protection Valve assembly. | Identify and rectify the leaky joints. Replace hose assy. If damaged, check FCPV for internal leak and overhaul assy if defective |
| POOR BRAKE / WHEEL ROLLING | Excess clearance between drum and brake lining. Glazy lining / brake drum. Excess drum ovality. Leakage through diaphragm. Leakage through clamp ring joint. Wrong setting of push rod fork stand out. Sticky operation of valve. Dual brake valve not operated to full travel. | Adjust the brakes. Rectify or replace as per recommendation. Replace diaphragm. Tighten clamp ring bolt. Set to correct dimension. Sticky operation of valve. Overhaul the assy. Check and rectify pedal travel |
| VEHICLE PULLING TO ONE SIDE WHILE APPLYING BRAKES | Brakes Dragging - apparent over-adjustment of brakes. ASA improperly installed. Too close to actuator: Brakes can't fully release. Spring brakes not fully retracting. Worn or broken foundation brake components including camshaft bushings. Vehicle brake torque imbalance (More work done by some brakes than others, thermal expansion of drums). Brake drum out-of-round, excessive thermal expansion. Air system malfunction, not exhausting completely. New lining swells during break-in | Correct ASA installation. Check spring brake release air pressure and repair or replace air valves as necessary. Repair or replace spring brake. Repair or replace worn or broken components. Check other brakes to ensure they are working. Check air pressure balance. Use same friction material on all axles. Replace or repair as required. Inspect and correct air brake system. Back-off adjustment until brakes are free |
Fault codes and symptom→remedy steps extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
Available documents
Operator's manual
About
Lincoln Electric K1540-2 — welder. Specifications and parts compiled from manufacturer documents.