Park Brake Caliper Assembly - Komatsu 830E Shop Manual

5. Inspect housing cylinder walls for damage.
Scratches or corrosion to a depth of 0.002 in.
(0.005 cm) or less on the cylinder wall can be
blended out with 300-500 grit wet-or dry sand-
paper or emery cloth. Replace housing if dam-
age is beyond these limits.
Excessive localized polishing of the cylinder wall
may result in fluid leakage.
6. Inspect spring washers (9) for cracks or corro-
sion. Replace parts that are cracked or severely
corroded.
7. Inspect capscrews (3 & 16) for cracks, corro-
sion, or thread damage. Replace damaged
bolts.
8. Inspect threaded hole (for adjustment bolt) in
yoke. The threaded hole in yoke for adjustment
bolt can be cleaned up with a 1-14 UNF-2B tap.
If threads are not serviceable, replace yoke.
9. Inspect threaded hole (for clamping capscrews)
in housing. The threaded hole in housing for
clamping bolt can be cleaned up with a 5/8-
11UNC-2B tap. If threads are not serviceable,
replace housing.
J07013

Park Brake Caliper Assembly

1. Using all new seal assemblies, lubricate seals
(6 & 12, Figure 7-2) with clean hydraulic oil as
used in brake circuit. Lubricate cylinder walls
with Dow Corning # 4 (or equivalent).
2. Install lubricated seals and backup ring (12 &
13) in housing.
3. Install lubricated seals and backup ring (6 & 7)
on pistons.
4. Attach lining (5) to pistons with screws (14).
(Refer to "Lining Replacement" Procedure).
5. Install piston in housing.
6. Lubricate spring washers (9) with anti-seize
compound.
7. Place spring retainers (15) on a flat surface with
the largest diameter on the bottom. Install pis-
ton dust boots (8) in groove of spring retainer
(15). Place lubricated spring washers (9) on
spring retainer so that the concave surface of
each pair of springs face one another.
8. Install spring retainers (15) with spring washers
on pistons.
9. Install the outer edge of dust boot (8) in grooves
of housing.
10. Place yoke (1) over housing (2) and align hole
in yoke with the hole in housing.
11. Place washer (4) on clamping bolt (3) and install
bolt and washer loosely. Attach yoke to hous-
ing.
12. Screw jam nut (17) all the way on adjustment
bolt (16) and apply anti-seize compound to
threads and end of bolt. Screw bolt in yoke part
way, approximately five (5) turns.
13. Install bleeder valves (11) on housing.
Rockwell Parking Brake J7-5