Dodge RAM TRUCK 1500 1995 Service Manual page 186

5 - 1 4 MASTER CYLINDER
B R
(10) Install cylinder body on reservoir (Fig. 14).
Use a rocking motion to slide the reservoir necks into
the grommets.
RESERVOIR
J9405-12
. Fig. 14 Assembling Reservoir And Cylinder Body
(11) Verify that reservoir is properly seated and
that grommets have not slipped out of place.
(12) Bleed master cylinder on bench before install­
ing it in vehicle. Refer to procedure in this section.
MASTER CYLINDER BLEEDINi (ON BENCH)*
An overhauled, or new master cylinder should al­
ways be bled before installation in the vehicle. This
practice saves time during brake bleeding because air
in the cylinder will not be pumped into the lines.
The only tools needed for bench bleeding are a vise,
a pair of bleed tubes, and a length of wood dowel.
Bleed tubes can either be purchased or fabricated
from spare brakelines and fittings.
Bench Bleeding Procedure
(1) Mount master cylinder in vise. Clamp vise jaws
on one of the cylinder mounting ears.
(2) Install bleed tubes in cylinder outlet ports and
direct tube ends into appropriate reservoir chambers
(Fig. 15).
W O O D
FLUID) J9405-71
Fig. 15 Master Cylinder Bleeding
(3) Fill reservoir chambers about 3/4 full with
fresh, clean brake fluid.
(4) Bleed cylinder by stroking cylinder pistons in­
ward then allowing them to return under spring
pressure. Use a wood dowel, or similar tool to stroke
pistons (Fig. 15).
(5) Continue stroking pistons until bubbles no
longer appear in fluid entering reservoir.
(6) Remove bleed tubes and install plastic plugs in
cylinder outlet ports. Plugs will prevent fluid loss
and keep dirt out until cylinder assembly is ready for
installation.
(7) Top off reservoir fluid level and install cover
and seal.
CAUTION: Be sure the seal is properly positioned
on the reservoir cover. The seal can shift out of po­
sition during installation if care is not exercised.
This will result in leakage and possible fluid con­
tamination.