Liangzi Power UTV1000-3, Maintenance Manual

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11. TROUBLESHOOTING
11- 4

Oil pump seized due to oil leakage and/or air inclusion. Replace oil pump
(refer to lubrication system).

Gears driving oil pump are broken or otherwise damaged. Replace gears.

Incorrect oil being used. Use recommended oil (refer to technical
specifications).
8. Check oil pressure regulator valve (spring) function.

Valve spring damaged (valve always open). Replace spring.

Valve piston is worn or broken. Replace valve piston (refer to lubrication
system).

Valve piston stays open due to contamination. Clean or repair valve piston.
9. Check plain bearings in crankcase for heavy wear.

plain bearings out of specification (increased clearance). Replace plain
bearings (refer to bottom end).
10. Check engine oil strainer in crankcase.

Oil strainer is clogged due to contamination. Clean or replace strainer and
diagnose causes. Replace possible damaged parts (refer to bottom end).
Symptom: OIL CONTAMINATION (white appearance)
1. Check leak indicator hole (in crankcase MAG side-water pump housing area) if
water and oil leaks.

Leakage of oil/water mixture from indicator bore means damaged water
pump seal ring and rotary seal. Replace sealing ring, rotary seal and change oil, oil
filter and/or coolant (refer to lubrication system, cooling system and bottom end).
2. Check cylinder head and/or cylinder base gasket..

Gasket damaged or leaking. Retighten cylinder head with recommended
torque and/or replace gasket.
3. Check tightening torque of cylinder head screws.

Screws not properly tightened. Retighten screws to recommended torque
and replace oil.
4. Check oil for particles (may indicate possible engine internal damages).

Oil contamination due to metal or plastic particles. Replace possibly
damaged part(s) including oil and oil filter. Use recommended oil (refer to
technical specifications).
CYLINDER AND HEAD
Symptom: UNUSUAL ENGINE NOISE AND/OR VIBRATION
1. Check noise coming from cylinder head area.

Improper valve clearance adjustment. Readjust valve clearance and/or
replace defective part(s).

Faulty chain tensioner. Replace spring and/or mechanism.

Chain guide worn out. Replace chain guide.

Stretched chain and/or worn out sprockets. Replace chain and sprockets.

Sprocket screws got loose. Retighten screws with recommended torque.