Timing Belt Installation - Yanmar 6LPA-STP2 Service Manual

Timing Belt
12/05
Tension Spring and Tensioner
1. Visually check the tensioner seal
(Figure 5-173, (1)) for oil leakage.
• If oil is not present on the push rod side of the oil
seal, the tensioner seal is in good condition.
• If oil is present on the push rod side of the oil
seal, replace the tensioner.
Figure 5-173
Figure 5-173
2. Hold the tensioner firmly and try to push the
push rod in. The push rod should not move, if it
moves, replace the tensioner (Figure 5-174).
Note: NEVER hold the tensioner with the push
rod facing down.
Figure 5-174
Figure 5-174
3. Measure the push rod protrusion
(Figure 5-175, (1)) from the end of housing.
• Protrusion: 9.0 to 9.8 mm (0.354 to 0.386 in.)
6LPA Service Manual
If the measured value is not within specifications,
replace the tensioner.
Figure 5-175

Timing Belt Installation

(1)
1. Install the pulley key into the key groove in the
camshaft.
0005172
2. Press the No. 1 timing pulley onto the camshaft
aligning to the key into the groove.
3. Hand tighten the pulley bolt.
4. Hold the camshaft with a hex wrench on the
flats (Figure 5-176, (1)) of the camshaft. Torque
the pulley bolt to 1000 kgf·cm, 98.00 N·m
(72.3 lb-ft) (Figure 5-176).
Figure 5-176
0005173
5. Remove all packing material from the rocker
cover sealing surfaces.
6. Apply seal packing to 3 positions of the cylinder
head.
7. Install the gasket to the rocker cover.
© 2007 Yanmar Marine International
ENGINE
Figure 5-175
(1)
Figure 5-176
(1)
0005174
0005175
5-73