Question 1

What does Sandvik fault code 301-402 (Electrical) mean?

Accepted Answer

301-402 (Electrical): Multiple random sensor codes; Display flickering; Engine won't crank. Fix: CAN-Bus Communication Error (Node 301).

LOGIC: The main controller has lost the "heartbeat" signal from the 301 node (usually the front frame module).

ACTION: 1. Check for 24V power at the 301 module. 
2. Inspect the "twisted pair" CAN wires for rubs at the center articulation joint. 
3. Check terminating resistors (60 Ohms).

FIX: Repair the harness at the articulation joint or replace the CAN node.

Question 2

What does Sandvik fault code 402-115 (Transmission) mean?

Accepted Answer

402-115 (Transmission): Rough shifting; Transmission "hunting" between gears; "Service Trans" light. Fix: Transmission Output Speed Sensor Signal Lost.

LOGIC: The transmission controller sees engine RPM but 0 output speed while in gear.

ACTION: 1. Inspect the sensor on the output shaft of the Dana/Spicer transmission. 
2. Check for "magnetic fuzz" on the sensor tip. 
3. Check for wire damage from falling rock/debris.

FIX: Clean the sensor tip or replace the Output Speed Sensor.

Question 3

What does Sandvik fault code 502-131 (Brake Pressure) mean?

Accepted Answer

502-131 (Brake Pressure): Service brakes feel "spongy" or don't hold; Alarm sounds; Machine may be locked in neutral. Fix: Brake Accumulator Pressure Low.

LOGIC: The pressure switch or transducer detects that the accumulator pressure has dropped below the safety limit (usually 110-120 bar).

ACTION: 1. Check brake oil level. 
2. Inspect the accumulator charging valve. 
3. Check for internal leaks in the brake piston seals.

FIX: Recharge the nitrogen in the accumulator or replace the brake charging pump.

Question 4

What does Sandvik fault code 701-205 (Hydraulic) mean?

Accepted Answer

701-205 (Hydraulic): Steering or Bucket movement is slow/jerky; High hydraulic oil temp; Pump noise. Fix: Hydraulic Main Pump Pressure Implausible.

LOGIC: The CAN-node sees a mismatch between the commanded pump displacement and the actual pressure feedback.

ACTION: 1. Check the suction strainer for metal particles. 
2. Verify the solenoid signal to the pump's displacement controller. 
3. Check the pilot pressure (usually 35 bar).

FIX: Replace the Main Hydraulic Pump or the displacement control solenoid.

Question 5

What does Sandvik fault code Code 45-02 mean?

Accepted Answer

Code 45-02 (Rotary Drilling): Rotary Head Stalls / Low Bit RPM Fix: LOGIC: Rotary Motor Displacement Control Solenoid Voltage Low.

ACTION: Inspect proportional solenoid harness at rotary top-drive gearbox. Measure coil resistance and check for chassis ground rub-through along the mast guide rails.

Question 6

What does Sandvik fault code Engine 102-3 (Volvo) mean?

Accepted Answer

Engine 102-3 (Volvo): Low power; High fuel consumption; Black smoke under load. Fix: Intake Manifold Pressure (Boost) Voltage High.

LOGIC: Signal > 4.5V (Open Circuit). The ECM defaults to a "smoke-limiter" map because it can't verify air pressure.

ACTION: 1. Inspect the wiring at the back of the intake manifold. 
2. Bridge pins to check for FMI 4. 
3. Check the turbocharger for wastegate seizure.

FIX: Replace the Boost Pressure Sensor or repair the broken harness wire.

Question 7

What does Sandvik fault code SPN 523620 FMI 04 mean?

Accepted Answer

SPN 523620 FMI 04 (Hydraulics): Drill Feed Will Not Advance Fix: LOGIC: Percussion Rock Drill Feed Enable Solenoid Short to Ground.

ACTION: Measure feed enable solenoid coil resistance on the carrier valve bank. Trace control wire loom along the boom telescope tube for pinch damage from boom extension cylinders.

Question 8

What does Sandvik fault code SPN 523699 FMI 31 mean?

Accepted Answer

SPN 523699 FMI 31 (Transmission): Clutch Slip Alarm / Shift Inhibited Fix: LOGIC: Unexpected Slippage in Active Speed Clutch Pack.

ACTION: Perform transmission clutch calibration and pressure test using Sandvik SICA diagnostic display. Inspect internal clutch pack friction discs for mechanical wear or pressure leakage.

Question 9

What does Sandvik fault code SPN 523730 FMI 07 mean?

Accepted Answer

SPN 523730 FMI 07 (Transmission): No Forward Travel / Gear Mismatch Fix: LOGIC: Forward High Directional Clutch Differential Pressure Slip.

ACTION: Connect hydraulic pressure gauges to the forward clutch testing station. Perform electronic clutch fill and calibration sequence via Sandvik SICA display screen.

Question 10

What does Sandvik fault code SPN 523762 FMI 5 mean?

Accepted Answer

SPN 523762 FMI 5 (Transmission): No Forward 1st/2nd Gear Engagement Fix: LOGIC: TCU Valve Driver Channel 3 (Clutch Solenoid) Under-Current.

ACTION: Measure resistance of Forward Low clutch solenoid coil on transmission control valve block (~12Ω). Inspect wiring harness passing over the articulation hitch.

Sandvik Fault Codes

Ready to take control of your fleet maintenance?

Other manufacturers

Code	System	Symptom	Full fix
301-402 (Electrical)	—	Multiple random sensor codes; Display flickering; Engine won't crank.	View fix
402-115 (Transmission)	—	Rough shifting; Transmission "hunting" between gears; "Service Trans" light.	View fix
502-131 (Brake Pressure)	—	Service brakes feel "spongy" or don't hold; Alarm sounds; Machine may be locked in neutral.	View fix
701-205 (Hydraulic)	—	Steering or Bucket movement is slow/jerky; High hydraulic oil temp; Pump noise.	View fix
Code 45-02	Rotary Drilling	Rotary Head Stalls / Low Bit RPM	View fix
Engine 102-3 (Volvo)	—	Low power; High fuel consumption; Black smoke under load.	View fix
SPN 523620 FMI 04	Hydraulics	Drill Feed Will Not Advance	View fix
SPN 523699 FMI 31	Transmission	Clutch Slip Alarm / Shift Inhibited	View fix
SPN 523730 FMI 07	Transmission	No Forward Travel / Gear Mismatch	View fix
SPN 523762 FMI 5	Transmission	No Forward 1st/2nd Gear Engagement	View fix
SPN 523821 FMI 05	Hydraulics	Steering Response Dead / Alarm Active	View fix