Every 8000 Miles (12,000 Km) Or 12 Months; Engine - Oil And Filter Change - Yamaha TDM850 User Manual

22 Every 4000 miles (6000 km) or 6 months
1»
illustration). Now tighten both the fork clamp
bolts to the specified torque setting (see
illustration).
13 Re-check the bearing adjustment
described above and re-adjust if necessary.
14 Install the handlebars (see Chapter 6). XTZ
models
15 Displace the handlebars from the top yoke
(see Chapter 6).
16 Slacken the fork clamp bolts in the top yoke,
then slacken the steering stem bolt (see
illustration). There is no need to remove the top
yoke.
17 To adjust the bearings as specified by
Yamaha, a special service toot (part No. 90890-
01268) and a torque wrench are required. If the
tool is available, first slacken the adjuster nut
(see illustration 22.18), then tighten it to the
initial torque setting specified at the beginning of
the Chapter, making sure the torque wrench
handle is at right angles (90°) to the line between
the adjuster nut and the wrench socket in the
special tool (see illustration 22.9). Now slacken
the nut one turn, then tighten it to the final torque
setting specified. Check that the steering is still
able to move freely from side to side, but that all
freeplay is eliminated.
18 If the Yamaha tool is not available, using
either a C-spanner or drift located in one of the
notches, slacken the adjuster nut slightly until
pressure is just released, then tighten it until all
freeplay is removed, then tighten it a little more
(see illustration). This pre-loads the bearings.
Now slacken the nut, then tighten it again, setting
it so that all freeplay is just removed yet the
steering is able to move freely from side to side.
To do this tighten the nut only a little at a time,
and after each tightening repeat the checks
outlined above

Every 8000 miles (12,000 km) or 12 months

Carry out all the items under the 4000 mile (6000 km) check, plus the following:
A Warning: Be careful when draining
the oil, as the exhaust pipes, the engine,
and the oil itself can cause severe
burns.
1 Consistent routine oil and filter changes are the
single most important maintenance procedure you
can perform on a motorcycle. The oil not only
lubricates the internal parts of the engine,
transmission and clutch, but it also acts as a
coolant, a cleaner, a sealant, and a protectant.
Because of these demands, the oil takes a terrific
amount of abuse and should be changed often
with new oil of the recommended grade and type.
Saving a little
as
21.12a Tighten the steering stem nut.
21.16 Slacken the fork clamp bolts (A) and
the steering stem bolt (B)
(Steps 3 and 4) until the bearings are correctly
set. The object is to set the adjuster nut so that
the bearings are under a very light loading, just
enough to remove any freeplay. Caution: Take
great care not to apply excessive pressure
because this will cause premature failure of
the bearings. 19 With the bearings correctly
adjusted,
money on the difference in cost between a good
oil and a cheap oil won't pay off if the engine is
damaged. The oil filter should be changed with
every second oil change.
2 Before changing the oil, warm up the engine
so the oil will drain easily. On 1991 to 1995 TDM
models and XTZ models, remove the engine
bashplate (see Chapter 8).
3 Put the motorcycle on its sidestand, and
position a clean drain tray below the engine. On
1991 to 1995 TDM models remove the seat, and
on XTZ models remove the right-hand side cover
(see Chapter 8). Unscrew the oil filler cap from
the oil tank to vent it and to act as a reminder
that there is no oil in the engine (see Daily (pre-
ride) checks).
4 First unscrew the oil drain plug from the
crankcase and allow the oil to flow into the drain
tray (see illustrations 7.4a and b). Next
and the fork clamp bolts to the
specified torque
21.18 Steering head bearing adjuster nut
(arrowed)
tighten the steering stem bolt and both the fork
clamp bolts to the torque settings specified at the
beginning of the Chapter (see illustration
22.16).
20 Re-check the bearing adjustment
described above and re-adjust if necessary.
21 Install the handlebars (see Chapter 6).
unscrew the oil drain plug from the oil filter
housing and allow the oil to flow into the drain
tray (see illustrations 7.4c and d). Check the
condition of the sealing washers on the drain
plugs and discard them if they are in any way
damaged or worn. On 1996-on TDM and TRX
models, Yamaha specify using new ones as a
matter of course.
5 When the oil has completely drained, fit the
plugs to the sump and oil filter housing, using
new sealing washers if required, and tighten
them to the torque settings specified at the
beginning of the Chapter. Avoid overtightening,
as damage to the crankcase will result.
6 With the drain tray still under the engine to
catch any residue oil, unscrew the bolts securing
the oil filter cover to the crankcase and remove
the cover along with the filter,
as
S<aned by Stalker