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1.Working through the vacuum
pump opening on the timing chain case, align the slit in the
supply pump gear with the oil channel hole in the timing
chain case.
2.Remove the supply pump mounting
bolts.
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When you pull out the supply pump
gear from the supply pump assembly, loosen the supply pump
gear mounting nut according to the procedure below in
advance.
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1.Use the following special
tools to support the crankshaft pulley.
- Front hub and flange yoke holder (MB990767)
- Pin (MD998719)
2.Loosen the supply pump gear mounting
nut.
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1.Position the key slit on
the supply pump gear as shown.
2.Remove all the
residual sealant from the threaded hole in the cylinder
block.
When the supply pump mounting bolt is reused,
carefully remove the residual sealant from the bolt
thread.
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3.When the supply pump
mounting bolt is reused, apply the sealant as
shown.
Specified sealant: ThreeBond 2403 or
equivalent
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4.Insert the supply pump
assembly through the vacuum pump opening in the timing chain
case so that the slit on the supply pump gear is aligned
with the oil channel hole on the timing chain
case.
5.Tighten the supply pump mounting bolts to
the specified torque.
Tightening torque: 25
± 7 N·m
6.If the supply pump
gear mounting nut is loosened, use the same special tools as
during removal to tighten the supply pump gear mounting nut
to the specified torque.
- Front hub and flange yoke holder (MB990767)
- Pin (MD998719)
Tightening torque: 83 ± 5
N·m
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1.
| caution |
- The removed supply pump pipe can be
reassembled up to five times. To count
the number of supply pump pipe
reassembly, record it by adding the
reassembly number of this time (once
usually) to the previous number of
reassembly written on the maintenance
handbook. When the number of the
previous reassembly reaches 5 or when
the supply pump assembly or common rail
assembly is replaced, always use a new
supply pump pipe. At that time, write
"New (0 times)" in the maintenance
handbook.
- If a fuel leak is present in the supply
pump pipe and supply pump pipe set once,
do not reuse it and replace with a new
one.
- If the supply pump assembly, common rail
assembly is replaced, the contact
surface (seal surface) between the
supply pump pipe and supply pump pipe
set, and the other side component is
changed, do not reuse the supply pump
pipe and replace with a new
one.
- When reassembling the supply pump pipe,
remove the foreign material attached on
the sealing surface, and install it with
the contacting point of the pipe
aligned.
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Align the supply pump pipe centre axis with the
other side components (common rail assembly and supply pump
assembly) centre axis to install the supply pump pipe. Then,
tighten the flare nut temporarily until the tip of pipe
(seal surface) contacts with the other side components.
| note |
When the supply pump pipe is
installed, tighten the flare nut while shaking
the pipe lightly to align the centre axis of
both components.
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2.Using the special tool
MB992188 or equivalent tool, tighten the supply pump side of
the supply pump pipe to the temporary tightening
torque.
Tightening torque: 18 ± 2
N·m
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3.Using the special tool
crowfoot wrench (MB992211), tighten the common rail assembly
side of the supply pump pipe to the temporary tightening
torque calculated by the following
formula.
Tightening torque: (18 ± 2)
× {L ÷ (L + 25)} N·m
18 ± 2: Tightening torque of
the fuel injection pipe (unit: N·m)
L:
Distance between the centre of a torque wrench drive
and of its handle (unit: mm)
25: Length of pitch
for special tool between holes (unit:
mm)
4.Using the special tool
MB992188 or equivalent tool, tighten the supply pump side of
the supply pump pipe to the specified
torque.
Tightening torque: 35 ± 5
N·m
5.Using the special tool
MB992211, tighten the common rail assembly side of the
supply pump pipe to the specified torque calculated by the
following formula.
Tightening torque: (35
± 5) × {L ÷ (L +
25)} N·m
35 ± 5:
Tightening torque of the fuel injection pipe (unit:
N·m)
L: Distance between the centre of a
torque wrench drive and of its handle (unit:
mm)
25: Length of pitch for special tool between
holes (unit: mm)
6.Check that no
fuel is leaked from the supply pump pipe connection
area.
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