Fault Phenomenon: SANY SW956 wheel loader veers left when driving straight.

Troubleshooting Process:
– Checked brakes: right brake caliper dragging or not fully releasing.
– Checked tires: inconsistent tire pressure between sides.
– Checked transmission: driveshaft universal joint from transmission output to drive axle sticking.
– Checked drive axle: high resistance in right wheel hub gearbox.

Root Cause: The piston in the right service brake caliper is stuck due to corrosion, preventing the brake pads from fully disengaging from the disc, creating driving resistance.

Required Parts: Disassemble and repair right brake caliper, replace seals and brake pads.