Yanmar 3TNV88F Service Manual page 119

Crankshaft and Camshaft Components
■ Measuring idler gear-to-camshaft gear
backlash
1. Drive a small wooden wedge between the
crankshaft gear and idler gear to prevent the
idler gear from rotating.
2. Install the dial indicator to read the camshaft
gear backlash. Rotate the camshaft drive gear
against the idler gear to measure the backlash.
Record the measurement.
3. Check the idler gear-to-fuel injection pump
drive gear backlash in the same manner as the
camshaft drive gear. Record the measurement.
■ Removal of timing gears
1. Remove the bolts from the idler gear shaft
(Figure 6-45, (1)). Remove the idler gear shaft,
idler gear (Figure 6-45, (2)) and bushing
(Figure 6-45, (3)).
Figure 6-45
2. Do not remove the crankshaft gear unless it is
damaged and requires replacement. If the gear
must be removed, remove it using a gear puller.
3. Removal of the camshaft gear requires the
camshaft be removed and placed in a press. Do
not remove the camshaft gear unless it or the
camshaft is damaged and requires
replacement. See Removal of camshaft on
page 6-36.
3TNV88F Service Manual
■ Removal of oil pan
1. Invert the engine (oil pan up) on the engine
2. Remove the oil pan (Figure 6-46, (1)).
2
3. Remove the oil pickup tube (Figure 6-47, (1))
3
1
K0001728A
stand.
Figure 6-46
and O-ring (Figure 6-47, (2)).
Figure 6-47
ENGINE
1
046357-00X00
2
1
046358-00X00
6-35