Yamaha TDM850 User Manual page 80

22.3 Unscrew the bolts (arrowed) and remove the sump
positions of the two dowels and remove them
if they are loose.
6 Unscrew the bolts securing the base of the
oil tank to the crankcase and lift off the base.
Discard the gasket as a new one must be
used. Note the positions of the two dowels
and remove them if they are loose.
Installation
7 Installation is the reverse of removal, noting
the following points:
a) Clean the oil tank in solvent and dry it
using compressed air, if available.
b) Make sure the dowels are correctly
located.
c) Use new gaskets.
22.4c ... and the strainer
d) Tighten the oil tank base and top bolts to
the torque setting specified at the
beginning of the Chapter.
e) Use new sealing washers on each side of
the oil pipe banjo unions and tighten the
banjo bolts to the specified torque
setting.
f) Use new O-rings on the oil pipe unions
and tighten the bolts to the specified
torque setting.
22 Oil sump, oil strainer and
pressure relief valve-removal, |§
inspection and installation
Note: The oil sump, strainer and pressure
relief valve can be removed with the engine in
the frame. If the engine has been removed,
ignore the steps which don't apply.
Removal
1 On 1991 to 1995 TDM models and XTZ
models, remove the engine bashplate (see
Chapter 8). On TDM and TRX models remove
the exhaust system (see Chapter 4).
2 Drain the engine oil and remove the oil filter
(see Chapter 1).
3 Unscrew the sump bolts, slackening them
evenly in a criss-cross sequence to prevent
distortion, and remove the sump (see
22.5 Pressure relief valve (A), bypass valve
(B), oil nozzle (C)
Engine, clutch and transmission 2*41
22.4a Remove the screws (arrowed).
illustration). Discard the gasket as a new one
must be used. Note the positions of the
dowels and remove them if they are loose.
4 Remove the screws securing the oil strainer
cover and remove the cover and the strainer
(see illustrations).
5 Remove the bolt securing the pressure
relief valve holder and remove the holder (see
illustration). Withdraw the valve and discard
the O-ring as a new one must be used.
Inspection
^
6 Remove all traces of gasket from the sump
and crankcase mating surfaces, and clean the
inside of the sump with solvent.
^
7 Clean the oil strainer in solvent and remove
any debris caught in its mesh. Inspect the
strainer for any signs of wear or damage and
renew it if necessary.
8 Push the relief valve plunger into the valve
body and check that it moves smoothly and
freely against the spring pressure. If not,
renew the relief valve - individual components
are not available. Similarly check that the
bypass valve ball can be pushed into its bore
and is not stuck (see illustration 22.S). Also
check that the oil nozzle is securely screwed
into its bore and has not worked loose.
9 Renew the O-rings around the oil passage
collars in the crankcase (see illustration).
Note their different sizes.
22.9 The O-rings (arrowed) should be
renewed
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