Page 1337 of 2898
SEF440Z
Crankcase Ventilation System
DESCRIPTIONNJEC0616In this system, blow-by gas is sucked into the air duct after oil
separation by oil separator in the rocker cover.
SEC692
INSPECTIONNJEC0617Ventilation HoseNJEC0617S011. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONYD
Crankcase Ventilation System
EC-613
Page 1338 of 2898
Injection Tube and Injection Nozzle
REMOVAL AND INSTALLATIONNJEC0618CAUTION:
+Do not disassemble injection nozzle assembly. If NG,
replace injection nozzle assembly.
+Plug flare nut with a cap or rag so that no dust enters the
nozzle. Cover nozzle tip for protection of needle.
JEF443Z
JEF340Y
Injection TubeNJEC0618S01RemovalNJEC0618S01011. Mark the cylinder Nos. to the injection tubes, then disconnect
them.
+Marking should be made at proper locations and by the
proper method, so that they are not erased by fuel, etc.
2. Remove the clamps, then disconnect the tubes one by one.
+The intake manifold is removed for explanation in the figure.
BASIC SERVICE PROCEDUREYD
Injection Tube and Injection Nozzle
EC-614
Page 1339 of 2898

JEF341Y
InstallationNJEC0618S01021. Referring to the figure and the marking which were made for
installation, connect the injection tubes to all the cylinders.
2. Connect temporarily the tubes to the cylinder head side only
by screwing 2 to 3 turns. Make sure that all tubes can be con-
nected to the pump side also.
3. Then, tighten the flare nuts of the cylinder head side and pump
side, starting from the opposite side from you.
JEF444Z
4. Attach the injection tube clamp in the direction shown in the
figure.
5. Insert tightening bolts of the clamp (4-tube type) from the rear
to the front of the engine.
JEF343Y
Injection Nozzle Oil SealNJEC0618S02RemovalNJEC0618S0201Using a tool such as a flat-bladed screwdriver, pry the flange of the
seal, then remove it.
Installation
NJEC0618S02021. After the high-pressure injection nozzle assembly is installed,
push the seal from the cylinder head side until it contacts the
flange.
2. Make sure that the garter spring of the seal on the high-pres-
sure injection nozzle assembly side is not falling.
+Replace the oil seal with new one when the high-pressure
injection nozzle assembly is removed. (It is not necessary
to replace the oil seal when only injection tubes are
removed.)
BASIC SERVICE PROCEDUREYD
Injection Tube and Injection Nozzle (Cont'd)
EC-615
Page 1340 of 2898

JEF344Y
Spill TubeNJEC0618S03RemovalNJEC0618S0301Loosen and remove the mounting bolts and flare nuts in the
reverse order of the numbers in the figure.
+When the flare nuts are loosened, hold the head of hexagonal
retaining bolts (head inside) using a wrench.
Installation
NJEC0618S03021. Tighten the flare nuts and mounting bolts in the numerical
order shown in the figure.
+When the flare nuts are tightened, hold the head of the hex-
agonal retaining bolts (head inside) using a wrench.
2. To prevent interference with the rocker cover, place the spill
gasket joint within the range shown by the arrow, then tighten
the mounting bolts. (Be especially careful about No. 2 and 4
cylinders.)
+After the spill tube is installed, check the airtightness of
the spill tube.
+After the bolts are tightened, the joint of the spill tube gasket
might be broken. However, this will not affect function.
JEF345Y
High Pressure Injection Nozzle AssemblyNJEC0618S04RemovalNJEC0618S04011. Remove the nozzle support, then pull out the high-pressure
injection nozzle assembly by turning it clockwise/
counterclockwise.
2. Using a tool such as a flat-head screwdriver, remove the cop-
per washer inside the cylinder head.
CAUTION:
Do not disassemble the high-pressure injection nozzle.
Installation
NJEC0618S04021. Insert the nozzle gasket to the cylinder head hole.
2. Attach the O-ring to the mounting groove of the nozzle side,
then insert it in the cylinder head.
TEST AND ADJUSTMENTNJEC0619WARNING:
When using nozzle tester, be careful not to allow diesel fuel
sprayed from nozzle to contact your hands or body, and make
sure your eyes are properly protected with goggles.
BASIC SERVICE PROCEDUREYD
Injection Tube and Injection Nozzle (Cont'd)
EC-616
Page 1341 of 2898

JEF346Y
Inspection for Spill Tube AirtightnessNJEC0619S01Before the rocker cover is installed, perform the inspection as fol-
lows.
1. Connect the handy vacuum pump to the spill hose.
2. Check that the airtightness is maintained after the negative
pressure shown below is applied.
Standard:
±53.3 to ±66.7 kPa (±533 to ±667 mbar, ±400 to ±500
mmHg, ±15.75 to ±19.69 inHg)
JEF347Y
Air Bleeding of Fuel PipingNJEC0619S02After the repair, bleed air in the piping by pumping the priming
pump up and down until it becomes heavy.
JEF348Y
Injection Pressure TestNJEC0619S031. Install injection nozzle assembly to injection nozzle tester and
bleed air from flare nut.
2. Pump the tester handle slowly (one time per second) and
watch the pressure gauge.
3. Read the pressure gauge when the injection pressure just
starts dropping.
Initial injection pressure:
New
21,476 - 22,457 kPa (214.7 - 224.5 bar, 219 - 229
kg/cm
2, 3,114 - 3,256 psi)
Limit
18,275 kPa (182.7 bar, 186 kg/cm
2, 2,650 psi)
+The injection nozzle assembly has a 2-stage pressure injection
function. However, the judgement should be made at the first
stage of the valve opening pressure.
Always check initial injection pressure using a new nozzle.
BASIC SERVICE PROCEDUREYD
Injection Tube and Injection Nozzle (Cont'd)
EC-617
Page 1342 of 2898
SEF434Z
Spray Pattern TestNJEC0619S051. Check spray pattern by pumping tester handle one full stroke
per second.
NG spray pattern:
Does not inject straight and strong (B in the figure).
Fuel drips (C in the figure).
Does not inject evenly (D in the figure).
2. If the spray pattern is not correct, replace injection nozzle
assembly.
Electronic Control Fuel Injection Pump
REMOVAL AND INSTALLATIONNJEC0620
JEF350Y
RemovalNJEC0620S011. Remove the parts shown below.
+Engine hood
+Engine coolant (drain)
+Engine cover
+Heater pipe under intake manifold
+Injection tubes
+Right splash cover (with undercover)
+Right front wheel
BASIC SERVICE PROCEDUREYD
Injection Tube and Injection Nozzle (Cont'd)
EC-618
Page 1343 of 2898

JEF351Y
2. Disconnect the fuel hoses from the fuel injection pump.
3. Disconnect the harness connector from the fuel injection
pump.
+Disconnect the connector by pulling the connector stopper
fully.
+When the stopper is fully pulled, the connector will be discon-
nected together. For installation, push the connector half way
first, then press the stopper until it locks, so that the connec-
tor is connected together.
4. Remove the fuel injection pump rear bracket.
JEF352Y
5. Remove the front chain case.
+Move the power steering fluid reservoir tank from the bracket.
+Loosen and remove the mounting bolts in the reverse order of
the numbers shown in the figure.
+As for bolts 6, 10, and 11, remove with rubber washer because
there is not enough space for removing only the bolts.
CAUTION:
To prevent foreign objects from getting in the engine, cover
the opening during the removal of the front chain case.
JEF353Y
6. Adjust the No. 1 cylinder to the top dead center position.
+Turn the crankshaft pulley clockwise, then align the alignment
mark (punched mark) of the camshaft sprocket to the position
shown in the figure.
+There is no indicator on the crankshaft pulley.
+It is not necessary to mark the secondary timing chain for
removal because it can be matched by the link color for instal-
lation. However, the alignment mark on the fuel injection pump
sprocket is difficult to see; mark it if necessary.
JEF354Y
7. Remove the chain tensioner.
a. Push the plunger of the chain tensioner, then fix it with a tool
such as a push pin.
JEF355Y
b. Using the hexagon wrench (face to face: 5 mm) (SST), remove
the mounting bolts, then remove the chain tensioner.
+A multi-purpose tool may also be used.
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-619
Page 1344 of 2898
JEF356Y
8. Remove the timing chain slack guide.
+Using the hexagon wrench (face to face: 6 mm, short-type)
(SST), remove the mounting bolts, then remove the timing
chain slack guide.
JEF357Y
9. Remove the timing chain tension guide.
10. Remove the secondary timing chain.
+Only the timing chain can be removed without removing the
sprockets.
JEF358Y
11. Fix the fuel injection pump sprocket.
a. Insert the positioning stopper pin (SST) in the 6 mm (0.24 in)
dia. hole of the fuel injection pump sprocket.
b. Using the torx wrench (SST), turn the pump shaft gradually to
adjust the hole position of the fuel injection pump sprocket.
c. Insert the positioning stopper pin through the fuel injection
pump body to fix the sprocket.
JEF359Y
+Insert the positioning stopper pin until its flange contacts the
fuel injection pump sprocket.
d. Remove the torx wrench (SST).
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-620