Chevrolet Light Duty Truck 1973 Service Manual page 285

CO M BINATION
VALVE
Removal
1. Clean all dirt and foreign material away from both
hose fitting ends.
2. Separate steel line from flex hose. Use a back up
wrench on the hose fitting.
3. Remove clip retainer from frame attachment.
4. Remove hose to caliper bolt and remove hose.
Installation (Fig. 33)
1. Install the hose to the caliper using new gaskets.
Torque the mounting bolt.
CAUTION:
See Caution on Page 1 of t h i s
s e c t i o n .
Hose l i n e must be installed i n caliper locating
gate (except "K" models); connector arm i n
caliper locating gate ("K" s e r i e s ) .
2. Insert hose into frame bracket or frame. This end
of hose will properly mate to the bracket or frame
in one direction only.
3. Install the clip retainer.
4. Install the steel line to the flex line using a back up
wrench on the hose fitting.
CAUTION:
See Caution on Page 1 of t h i s
s e c t i o n .
BRAKE LINE
FUEL LINE
TO MASTER CYLINDER
FRONT BRAKE HOSE
Fig. 34-Brake Line Retainers- Typical
5. Bleed brakes as outlined in this section.
Hydraulic Brake Tubing (Figs. 35 thru 39)
Hydraulic brake tubing used on all trucks is a double
wall steel tubing which resists corrosion and has the
physical strength to stand up under the pressures which
are developed when applying the brakes. In making up
hydraulic brake lines, it is important that the ends of the
tubing be flared properly for the compression couplings.;
AXLE
CAUTION:
When necessary t o replace brake
tubing, always use double wall s t e e l tubing
which i s designed t o withstand high pressure
and r e s i s t corrosion. Steel tubing must be
equivalent t o G M Specification GM123M, be
annealed dead s o f t and super terne coated.
ORDINARY COPPER TUBING IS N O T
SATISFACTORY A N D S H O U L D N O T BE
USED.
When replacing brake l i n e s , be sure t o i n s t a l l
new spring s t e e l shielding material over the
replacement l i n e i n the same areas as on the
l i n e removed.
LIGHT DUTY TRUCK SERVICE MANUAl*
BRAKES 5 -1 9
REAR BRAKE HOSE