Liangzi Power UTV1000-3, Руководство по обслуживанию

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11. TROUBLESHOOTING
11- 12
intake system and replace defective part(s).
4. Melted and/or perforated piston dome; melted section at ring end gap.

Spark plugs heat range is too hot. Install recommended spark plugs (refer
to TECHNICAL SPECIFICATIONS).

Coolant less than recommended level (engine gets too hot). Repair cooling
circuit and/or refill with recommended liquid.

Poor quality and/or wrong fuel. Clean from contamination and use
appropriate fuel (refer to TECHNICAL SPECIFICATIONS).
5. Piston color is dark due to seizure on intake and exhaust side.

Cooling system leaks and lowers coolant level. Tighten clamps or replace
defective parts. Add antifreeze in cooling system until appropriate level s reached.
Replace damaged parts.
6. Cracked or broken piston.

Cracked or broken piston due to excessive piston/cylinder clearance or
engine overheating. Replace piston. Check piston/cylinder clearance (refer to
CYLINDER AND HEAD).
7. Check piston rings and cylinder surface for grooves.

Poor oil quality. Use recommended oil.

Contamination through engine intake. Replace defective part(s) and use
new air filter.
8. Check crankshaft, rocker arms movement.

Oil pump failure due to lack of oil. Repair and replace defective parts and
use new recommended oil.

Oil contamination due to clogged oil filter/oil strainer. Replace oil and oil
filter at the same time, replace defective part(s).
9. Check valve springs exhaust/intake.

Broken valve spring damages the cylinder head, valve(s), rocker arm(s),
piston, piston rings and connecting rod. Replace defective part(s).
10. Check if fuel supply is sufficient.

Low fuel level.

Clogged fuel filter or fuel injector filter.

Fuel line is contaminated and/or bent. Clean and/or replace defective
part(s).
Symptom: ENGINE BACKFIRES
1. Check spark plugs.

Carbon accumulation caused by defective spark plugs. Replace spark
plugs.
2. Check leakage on intake manifold.

Air leak on intake system. Retighten screws and/or replace intake manifold
gasket.
3. Check exhaust air leaking.

Exhaust gasket is leaking. Retighten screws and/or replace exhaust gasket.
4. Check intake valve(s) for leaking.