Hol-Gar GS-107-AC troubleshooting: 25 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Hol-Gar GS-107-AC — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| Load Switch-cireuit breaker trips. | Check and adjust load. Resat load switch If condition con- tinues shut down unit and check external and internal circuits. | |
| Engine does not start or starts and a Ner operation shuts down for no apparent cause. | Locate safety switch in wiring diagram (figs, 16 & 18), Check circuit for continuity or grounds. Ensure that conditions for which safety awitch was installed doesn’t exist. Replace safety switch if defective. | |
| Frequency cannot be maintained or engine keeps racing and/or slowing down, Frequency does not stabilize. | Excessive changing load. Governor cannot control engine speed: out of adjustment or defective. | Check load and adjust as re-quired. Adjust engine governor. Replace governor if adjustment cannot be made. |
| 4-¢ output voltage changing cannot be maintained. Voltage doesn’t Stabilize, | Excessively changing load Voltage regulator cannot maintain voltage. | Check load and adjust ag re-quired. & load is not at fault check voltage regulator. Replace plug in unit with known good one. See if resistors in regulator are good. Check a-c generator brushes and rigging. Replace if faulty. |
| Engine will not tarn over and fire. | Loose or defective wiring. | Tighten all loose connections ar replace. |
| Engine turns but will not start (Contd). | Engine flooded. Carburetor passages restricted by water, icé or corrosion. Fuel pump defective. Restricted air cleaner. | Push choke control all the way in and turn engine over, [f carburetor continues to flood, repair if, Clean fuel system. Replace or repair carburetor. Replace fuel pump. Remove air cleaner and clean filter. |
| Complete electric failure, Load switch - circuit breaker trips. | Shot down uni Determine if power failure is caused from an external or internal source. (Par. b. above} | |
| Generator does not build up and produce voltage. | Blackened collector rings. Intermittent sparking at brushes. | Sand or turn down collector rings. Replace short brushes. Adjust springs - replace weak brush springs. |
| Excessive hum. | Uneven air gap. Foreign matter in air gap. Extreme vibration. Alignment of unit Dirt or alignment. | Check brushes. Measure with feeler gauge. Check roter for balance. Check bearing. Remove rotor and clean. Check brushes and spring set. Tighten mounting bolts to base and engine. Blow out all dirt in unit, use solvent on wound sections to remove Sticky dirt. Check flaw of ventilating air, Check for grounds. |
| Engine cranks too slowly | Oil in crankcase too heavy for low temperature | See para. 144. for oil recommendations |
| Engine cranks but won't start | Fuel system faulty | |
| Bregine hard to start | No fuel in tank | Refill tank |
| Engine misses and backfires but fails to start | Incorrect timing | See Trouble-Shooting Chart 6 and para 18b. |
| Engine misses at light load | Incorrect ignition timing | See Trouble-Shooting Chart 3 |
| Engine misfires at heavy load | Faulty carburetion | See Trouble-Shooting Chart 2 |
| Engine backfires | Spark plig gaps too narrow | Set at .023"° |
| Excess oil consumption, light blue smoky exhaust | Defective high tension cables | Inspect and replace if necessary |
| Excess oil consumption, no increase in Smoke | Spark plug gap too wide | Adjust to .025 |
| Black, smoky exhaust, excessive fuel consumption | Clogged carburetor idle jet | Clean carburetor (para Lie) |
| Dull, metallic thad: if not bad may disappear after few minutes of operation | Sharp, metallic thud, especially when cold engine first started | See Trouble-Shooting Chart 3 |
| Tapping sound, clacking, light clicking | Metallic knock und | |
| Hollow clicking sound with engine cool and under load | Engine misfiring | See Engine Misfiring this chart |
| Light pounding knock | Defective intake valve stem cil seal, Worn intake valve, guide or valve stem, Faulty ignition, Oil leak from oil base or connections, Leaky crankshaft oil seals | Inspect engine; check for clogged crank-case breather, Inspect oli seals, para 18b. (2) and 18e. (5). Check for clogged crankcase breather |
| Pinging sound when engine is suddenly or heavily loaded | Engine misfiring, Excess oil in crankcase, Engine overheating, Defective intake valve stem cil seal, Worn intake valve, guide or valve stem, Faulty ignition, Oil leak from oil base or connections, Leaky crankshaft oil seals, Fuel mixture too rich, Choke not open, Clogged air intake, Worn crankshaft bearing, Low oil supply, Oil badly diluted, Valve clearance too great, Broken valve spring, Worn connecting rod bearings, Loose piston | See Engine Misfiring this chart, Drain to full level, See para. 10b., Replace (para. 16), Replace (para. 16), See Trouble-Shooting Chart 3, Inspect engine; check for clogged crank-case breather, Inspect oli seals, para 18b. (2) and 18e. (5). Check for clogged crankcase breather, Adjust carburetor, para Lle., Clean air cleaner, para lid, Replace bearing, Add oil, check for cause of low off, Replace oil, Remove carbon, Adjust breaker points. Retime spark if necessary |
| Engine overheats | Wrong spark plug, Valve hot, Fuel stale or low octane, Lean fuel mixture, Engine hot, Defective ventilating system, Defective installation, Improper lubrication, Late ignition timing, Fuel mixture too lean | Install correct spark plug, Adjust valve clearance, Use good, fresh fuel, Clean and adjust carburetor, Check air circulation, Check engine and ducts, Inspect complete installation including ducts ete., Check oil system, Retime ignition, Adjust carburetor (para 11e). Clean Spark plugs and period of time on gasoline operation |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Excessive changing load. Governor cannot control engine speed: out of adjustment or defective.. See the table for the matching fixes.
Documented causes: Excessively changing load Voltage regulator cannot maintain voltage.. See the table for the matching fixes.
Documented causes: Loose or defective wiring.. See the table for the matching fixes.