Brake Fluid Level Checks; Front Brake Fluid Level; Before You Start - Yamaha TDM850 User Manual

UNREGISTERED VI
0.12 Daily (pre-ride) checks

2 Brake fluid level checks

Warning: Brake hydraulic fluid can harm your eyes and damage painted surfaces, so use extreme caution when handling and
A
pouring it and cover surrounding surfaces with rag. Do not use fluid that has been standing open for some time, as it absorbs
moisture from the air which can cause a dangerous loss of braking effectiveness.

Before you start:

• Support the motorcycle in an upright position,
using an auxiliary stand if required.
• When checking the front brake fluid level turn
the handlebars until the top of the master cylinder
is as level as possible.
• On XTZ models remove the right-hand side
cover to view the rear brake fluid level (see
Chapter 8).
• Make sure you have the correct hydraulic fluid.
DOT 4 is recommended.
• Wrap a rag around the reservoir being worked
on to ensure that any spillage does not come into
contact with painted surfaces.
Bike care:
• The fluid in the front and rear brake master
cylinder reservoirs will drop slightly as the brake
pads wear down.
• If any fluid reservoir requires repeated topping-
up this is an indication of an hydraulic leak
somewhere in the system, which should be
investigated immediately.
• Check for signs of fluid leakage from the
hydraulic hoses and components - if found,
rectify immediately.
• Check the operation of both brakes before
taking the machine on the road; if there is
evidence of air in the system (spongy feel to
lever or pedal), it must be bled as described in
Chapter 7.
5 Top up with new clean hydraulic fluid of the
recommended type, until the level is above the LOWER level line.
Take care to avoid spills (see Warning above).

Front brake fluid level

On TDM and XTZ models, the front brake fluid
level is visible through the window in the
reservoir body - it must be above the LOWER
level line (arrowed).
On TDM and XTZ models, if the level is
below the LOWER level line, remove the
two reservoir cover screws and remove the
cover and the diaphragm.
Ensure that the diaphragm is correctly seated before installing the
plate (TRX models) and cover or cap.
UNREGISTERED VI
On TRX models, the front brake fluid level is
visible through the reservoir body - it must
be between the UPPER and LOWER level lines
(arrowed).
On TRX models, if the level is below the LOWER
level line, remove the reservoir cap
screw (arrowed), then
unscrew the cap and remove the diaphragm
plate and the diaphragm.
UNREGISTERED VERSION OF PICTURE-DESK
clamp
Started by Stalker