Honda GX270T2, GX270UT2, GX390T2, GX390UT2, GX390RT2 Information Manual
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GX270T2/UT2 GX390T2/UT2/RT2 Engine Assembly Information
PISTON RING SET |
(Use the recommended engine oil, |
unless otherwise specified.) |
ASSEMBLY:
Be sure that the top and second ring are not interchanged.Install the top ring and second ring on the piston with the maker
mark side facing up.
Check that the piston rings rotate smoothly after installing them.Space the piston ring end gaps 120 degrees apart, and do
not align the gaps with the piston pin bore.
PISTON |
TOP RING |
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(CHROME PLATED) |
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SECOND RING |
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OIL RING |
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(COMBINATION RING) |
MAKER MARK
10 mm (0.4 in)
10 mm (0.4 in)
MARK
PISTON PIN
PISTON PIN CLIP (20 mm) (2)
ASSEMBLY:
Install by setting one end of the piston pin clip in the groove of the piston pin bore, holding the other end with long needle pliers, and rotating the clip in. Do not align the end gap of the piston pin clip with the cutout of the piston pin bore.
END GAP
CUTOUT |
PISTON |
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PIN CLIP |
CONNECTING ROD UPPER
ASSEMBLY:
Set the connecting rod upper with the long end toward the mark on the piston head.
PISTON/CRANKSHAFT/BALANCER
TOP RING (Chrome plated)
SECOND RING
SIDE RAIL
SPACER
SIDE RAIL
OIL RING (COMBINATION RING)
PISTON
LOCK PIN (10 mm)
INSTALLATION:
Install the lock pin immediately after installing the governor arm shaft in the direction as shown.
The 10 mm lock pin must be installed with the straight side of the 10 mm lock pin against the groove of the governor arm shaft.
(Replace the part(s) with new one(s) before assembly.)
DRAIN PLUG WASHER (12 mm) (2)
OIL LEVEL SW JOINT NUT (10 mm)
10 N·m (1.0 kgf·m, 7 lbf·ft)
DRAIN PLUG BOLT (2)
22.5N·m (2.25 kgf·m, 17 lbf·ft) WASHER (8.2 x 17 x 0.8 mm)
GOVERNOR ARM SHAFT
LONG END |
OIL LEVEL SW |
FLANGE BOLT |
(If equipped) |
(6 x 12 mm) (2) |
GROOVE
BALANCER
WEIGHT
PISTON
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INSTALLATION: |
MARK |
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Install the piston to the cylinder |
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RIBS |
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barrel with the mark on the |
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piston head toward the push |
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rod hole of the cylinder head. |
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Viewed from cylinder head side |
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VALVE LIFTER
REMOVAL:
When removing the valve lifters, mark so that the intake and exhaust sides can be distinguished.
INSTALLATION:
Attach the valve lifters to the cylinder barrel immediately before installing the camshaft.
CAMSHAFT SIDE
CONNECTING ROD BOLT (2)
14 N·m (1.4 kgf·m, 10 lbf·ft) (Apply to the threads and seating surface)
CRANKSHAFT
INSTALLATION: Before installing the crankshaft, check the oil
seal of the cylinder barrel for damage or hardening. Be careful not to damage the oil seal when installing the crankshaft.
BALANCER/CRANKCASE COVER/GOVERNOR
BALANCER WEIGHT/CAMSHAFT INSTALLATION |
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GOVERNOR HOLDER CLIP |
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GOVERNOR SLIDER |
EXCEPT E TYPE |
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Install balancer weight to the cylinder barrel by aligning the punch |
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ASSEMBLY: |
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ASSEMBLY: |
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Install firmly into the groove |
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Spread the governor weight to install |
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marks of the balancer weight and the crankshaft (marked on the |
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KEY (7 x 7 x 33 mm) |
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of the governor shaft. |
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the governor slider. |
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balancer drive gear). |
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(6.3 x 6.3 x 43 mm) |
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CRANKSHAFT |
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After installing the governor slider, |
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BALANCER WEIGHT |
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DOWEL PIN |
(If equipped) |
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check to be sure it moves smoothly. |
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GOVERNOR WEIGHT |
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(8 x 12 mm) (2) |
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PIN (3) |
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GOVERNOR WEIGHT (3) |
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CRANKCASE COVER |
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REASSEMBLY: |
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(Without reduction type) |
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BALANCER |
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After installing the governor weight, |
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PUNCH |
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check to be sure they move smoothly. |
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DRIVE GEAR |
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OIL FILLER CAP |
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MARKS |
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CRANKCASE COVER |
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Install the camshaft to the cylinder barrel by aligning the punch |
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marks of the camshaft and the crankshaft (marked on the timing |
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PLAIN WASHER |
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CRANKCASE COVER |
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gear). |
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(With reduction type) |
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CRANKSHAFT |
TIMING GEAR |
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GROOVE |
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CASE COVER PACKING |
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PUNCH |
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OIL FILLER CAP |
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MARKS |
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OIL FILLER PACKING (2) |
BOLT (8 x 40 mm) (7) |
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CAMSHAFT |
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(With oil level gauge) |
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24 N·m (2.4 kgf·m, 17 lbf·ft) |
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See the shop manual for additional information. |
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© Honda Motor Co., Ltd. 2010 |
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