Komatsu 830E Shop Manual page 401

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FIGURE 7-2 PARK BRAKE ASSEMBLY (SCL70-4)
1. Yoke
2. Housing
3. Clamping Capscrew
4. Washer
5. Lining
6. Seal Assembly
7. Backup Ring
8. Dust Boot
9. Spring (4/piston)
NOTE: Earlier version (SCL70-3) had a different
style Seal Assembly, 6 & 12, and did not have
Backup Rings, 7 & 13.
12. With truck engine running, apply and release
park brake three (3) times. Check for leaks. If
caliper leaks, refer to "Caliper Removal and Dis-
assembly" procedures and repair leaking cali-
per.
NOTE: If another source of hydraulic power (such as
"porta-power") is used for this check, install a gauge
in line. Use 2200 - 2500 psi (10.3 MPa - 17.2 MPa)
pressure for adjustment.
J07013
10. Piston
11. Bleed Screw
12. Seal Assembly
13. Backup Ring
14. Screw
15. Spring Retainers(2)
16. Adjustment Bolt
17. Jam Nut
Rockwell Parking Brake
Exceeding MAXIMUM pressure of 3000 psi (20.7
MPa) may rupture seals in park brake caliper and
cause leakage.
13. Tighten clamp capscrew (3) to 125 ft.lbs. (170
N.m) torque and insure parking brake lines are
tightly connected. Lockwire clamp capscrew (3)
to adjusting bolt (16) as shown to prevent loos-
ening.
14. Bleed park brake after starting engine. Refer to
"Brake Bleeding Procedure".
15. With engine running and park brake switch
"OFF" (brake released*), check the lining-to-
disc clearance for both inboard and outboard
linings with a long feeler gauge. Clearance
should be 0.025 in. - 0.060 in. (0.635 mm -
1.524 mm) for both inboard and outboard lin-
ings.
*NOTE: If another source of hydraulic power (such
as "porta-power") is used for this check, install a
gauge in line and use 2200 - 2500 psi (10.3 MPa -
17.2 MPa) pressure for adjustment.
Exceeding MAXIMUM pressure of 3000 psi (20.7
MPa) may rupture seals in park brake caliper and
cause leakage.
16. If the lining-to-disc clearance is not as specified,
repeat steps 2 through 14 and also refer to
determination of Dimension "B", "Caliper, Disc,
And Park Brake Installation", in Armature
Speed Rear Disc Brakes section. Re-shim disc
if necessary.
17. Condition park brake linings according to "Lin-
ing Conditioning" procedure before releasing
truck to production.
J7-3