1997 ISUZU TFS SERIES diagram

5-6 BRAKES
PIPING DIAGRAM (MODEL WITH BLEND PROPORTIONING VALVE)
PIPING DIAGRAM (MODEL WITH LSPV)

5-20 BRAKES
BLEND PROPORTIONING VALVE (IF SO EQUIPPED)
Structure and Operation
Structure
Side
I shows P-valve ; side II shows bypass valve.
Bypass valve seals the routes
4 and 5 using the seal 2 at
the piston
1 end.
In addition, spring
3 presses against the piston 1, and in
order to seal out the route
4 and route 5 sufficiently, spring
3 presses seal 2 against cylinder end surface.
The left figure is a characteristic curve diagram.

5-52 BRAKES
2. Piston Assembly ; Secondary and Spring
3. Piston Assembly ; Primary and Spring
Lubricate the piston cups on the primary piston assemblies with
rubber grease.
Take care not to scratch the piston cup when installing the
piston assemblies.
Note:
Don't remove the spring from the piston.
6. Bolt ; Stopper
Depress the primary piston and install the piston stopper bolt
with a new gasket.
Torque N
m(kgfm/lbft)
6.9 - 8.8 (0.7 - 0.9 / 5.1 - 6.5)
7. Grommet
Lubricate the new grommets with clean rubber grease.
Insert the grommets, with the flared side up, into the cylinder
body.
Apply rubber grease to the dust seal portion.
(The portion indicated by the arrows in the left diagram.)
9. Screw
Torque N
m(kgfm/lbft)
1.0 - 2.0 (0.01 - 0.20 / 0.7 - 1.5)
12.Dust Seal
Install the dust seal so that its groove faces downward.