Inspection And Adjustment; Fan Belt Tension Adjustment; Measuring The Piston Compression Pressure - Ezgo 1600xd Repair Manual

5. INSPECTION AND ADJUSTMENT

5.1 FAN BELT TENSION ADJUSTMENT

1. Measure the deflection, depressing the belt halfway
between the fan drive pulley and the alternator pulley
at 78.5 N (8 kgf, 17.6 lbs) of force.
2. If the defl ection is not between the factory specifi ca-
tions, loosen the bolts and nuts, and relocate the alter-
nator to adjust.
3. Replace the belt if damaged or worn
Item
Belt tension (defl ection)
3
-34
ENGINE - INSPECTION AND ADJUSTMENT
UUVW206A
Factory spec.
8 mm(0.32 in.) at 78.5 N
(8 kgf, 17.6 lbs) of force
5.2 MEASURING THE PISTON COMPRESSION
PRESSURE
1. Run the engine until warm.
2. Stop the engine and remove the air cleaner, the muffl er
and all nozzle holders.
3. Set a compression tester to the adaptor installed in the
nozzle holder hole and fi xed with the locating screw.
4. Turn the petcock to the OFF position on the fuel fi lter
assembly to cut the fuel and run the engine with the
starter at 200 to 300 rpm for 5 to 10 seconds.
Measure the maximum pressure while running, several
times
• For the test, use a fully charged battery and the
specifi ed valve clearance.
• If the pressure does not reach the allowable limit,
apply a small amount of oil to the cylinder wall
through the nozzle holder hole and measure the
pressure again.
▶ JUDGMENT
• If the pressure raises after applying oil, check the cyl-
inder wall and piston rings.
• If the pressure still low, check the top clearance, valve
clearance and cylinder head.
• If the compression differs more than 10% among the
cylinders, trace the cause of pressure variation and
take corrective measures.
Item Factory spec.
2.8 ~ 3.2 Mpa
Compression
29 ~ 33 kgf/cm
pressure
412 ~ 469 psi.
Difference
between two
-
cylinders
CAUTION
• Check the compression pressure with the
specifi ed valve clearance for proper air intake.
UUVW207A
Allowable limit
2.32 Mpa
2
2
23.7 kgf/cm
337 psi.
10 %
SUUV-W00 Apr. 2011