954_04_lubrication(1).pdf
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LUBRICATIQN SYSTEM
LUBRICATION
SYSTEM DIAGRAM
CAMSHAFTS
CRANKSHAFT
1
OIL FILTER CARTRIDGE
1
i
cou
NTERSHAFT
OIL
PUMP
OIL STRAINER
T
n
LUBRICATION SYSTEM DIAGRAM
4-0
OIL STRAINERPRESSURE RELIEF
VALVE
4-3
SERVICE INFORMATION
4- 1
OIL
PUMP
4-5
TROUBLESHOOTING
4-2
OIL COOLER
4-9
OIL PRESSURE INSPECTION
4-3
SERVICE INFORMATION
GENERAL
Repeated, prolonged exposure to used motor oil may cause skin cancer.
Wash your hands thoroughly with strong soap as soon as possible after handling used oil.
The oil pump can be serviced with the engine installed in the frame.
The service procedures in this section must be performed with the engine oil drained.
When removing and installing the oil pump, use care not to allow dust or dirt to enter the engine.
If any portion of the oil pump is worn beyond the specified service limits, replace the oil pump as an assembly.
-
After the oil pump has been installed, check that there are no oil leaks and that oil pressure is correct.
SPECIFICATIONS
Unit: mm
(
STANDARD
3.5 liter (3.7 US qt, 3.1 Imp
qt)
3.7 liter (3.9
US
qt, 3.3 Imp qt)
4.0 liter (4.2 US
qt,
3.5
Imp
qt)
Pro Honda GN4 or HP4 (without molybde-
num additives) 4-stroke oil or equivalent
motor oil
API service classification: SG or higher
JASO T 903 standard:
MA
Viscositv: SAE IOW-40
490 kPa (5.0 kgf/cm2,
71
psi) at
5,400 rpm/(80"C/176"F)
0.15 (0.006) max.
0.15 - 0.22 (0.006 -
0.009)
0.02 -
0.07
(0.001 - 0.003)
SERVICE
LIMI-
__
Engine
oil
capacity
At draining
At oil filter change
1
At disassembly
Recommended engine oil
I
Oil pressure at oil pressure switch
0.20
(0.008)
0.35 (0.014)
0.10 (0.004)
Oil pump rotor
Tip clearance
Body clearance
Side clearance
LUBRICATION SYSTEM
TORQUE VALUES
29 N*m (3.0 kgf-m, 22 Ibfeft)
74 N-m (7.5 kgf-m,
54
lbf-ft)
8
N*m
(0.8
kgf-m,
5.8 Ibf*ft)
15 N-m (1.5 kgfom, 11 Ibf-ft)
26
N-m (2.7 kgf-m,
20
Ibf-ft)
29 N*m (3.0 kgf-m, 22 Ibfoft)
Oil drain bolt
Oil cooler mounting bolt
Oil pump assembly flange bolt
Oil pump driven sprocket bolt
Oil filter cartridge
Lower crankcase 20 mm sealing bolt
CT bolt
Apply a locking agent to the threads.
Apply clean engine oil to the O-ring.
Apply a locking agent to the threads.
TOOLS
Equivalent commercially available
in
U.S.A.
07506-3000001
07510-MA70000
07 HAA-PJ70
1
0
1
Oil pressure gauge set
Oil pressure gauge attachment
Oil filter wrench
_I
or 07 HAA-PJ7O
100
TROUBLESHOOTING
-
Oil consumption
External oil leak
High
oil pressure
Plugged oil filter, gallery, or metering orifice
Engine
oil
level too
low
-
Incorrect oil being used
-
Worn piston ring or incorrect piston ring installation
-
Worn valve guide or seal
Oil
contamination
From coolant mixing with oil
- Faulty water pump mechanical seal
- Faulty cylinder head gasket
-Water leak in crankcase
-
Faulty oil cooler
Low
or no oil pressure
Clogged oil orifice
Incorrect oil being used
No
oil pressure
Oil level too low
Oil pump drive sprocket broken
Oil pump damaged (pump shaft)
-
Internal oil leak
-
Clogged oil strainer screen
Oil pump worn or damaged
*
Internal oil leak
Incorrect oil being used
Low oil level
Low oil
pressure
4-2
LUBRICATION SYSTEM
OIL PRESSURE INSPECTION
Check the oil level (page 3-15).
If the oil pressure
indicator light
remains on
a
few
Warm upthe engine to normal operating temperature
(aeeroximately 80°C/176"F).
seconds, check
Ihe
indicator
system before
checking the
oii
Sto'p the engine and remove the crankcase sealing
bolt.
pressure.
Connect an
oil
pressure gauge and attachment
to
the
crankcase.
OIL
PRESSlJRE
GAUGE
TOOLS:
Oil
pressure gauge set
07506-3000001
(Equivalent
commercially
available in U.S.A.)
Oil
pressure gauge attachment
07510-MA70000
(Equivalent
commercially
available in U.S.A.)
I
Start the engine and increase the rpm to 5,400 rpm
and read the oil pressure.
SEALING BOLT
/
OIL PRESSURE:
490 kPa (5.0 kgf/cm*, 71 psi) at
5,400
rpm/
(80"C/176"F)
Stop the engine and remove the tools.
Apply a locking agent to the sealing bolt threads.
Install and tighten the sealing bolt to the specified
torque.
TORQUE: 29 N-m (3.0 kgf-m, 22 Ibf-ftl
I
I
OIL STRAINER/PRESSURE RELIEF
VALVE
REMOVAL
Drain the engine oil (page
3-15).
Remove the exhaust pipe (page 2-13)
Remove the
oil
pan flange bolts and
oil
pan.
4-3
LUBRICATION SYSTEM
Remove the pressure relief valve and O-ring.
Remove the oil strainer and gasket.
Clean the oil strainer screen.
INSPECTION
Check the operation of the pressure relief valve by
pushing on the piston.
Disassemble the relief valve by removing the snap
ring.
Inspect the piston for wear, unsmooth movement or
damage.
Inspect the spring for fatigue or damage.
Assemble the relief valve
in
the reverse order of dis-
assembly.
SNAP
R
ING
INSTALLATION
Apply oil to the new gasket and install it onto the oil
strainer.
Install the oil strainer into the crankcase while align-
ing its boss with the groove
in
the crankcase.
4-4
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