Komatsu 830E-AC Shop Manual page 621

4. Insert the piston assembly into the adjuster pin
extender tool and secure firmly using the
knurled nut on the threads of the adjuster pin.
Place the special tool and piston assembly
under the arbor and drop in three 9.5 mm
(0.375 in.) dowel pins as shown in View B, Fig-
ure 6-20 Place the calibrated spring pod on top
of the dowels.
5. Apply arbor force slowly to the top of the cali-
brated spring pod and observe that slippage
occurs between 173-362 kg (380-800 lbs).
6. If adjuster slippage occurs below 173 kg (380
lbs) minimum or above 362 kg (800 lbs) maxi-
mum force, replace the adjuster pin and
adjuster in the piston assembly. See instruc-
tions elsewhere in this chapter.
Adjuster Force
Observe all warnings and cautions provided by
the press manufacturer to avoid damage to com-
ponents and serious personal injury.
Do not use the spring tester for making adjuster
force measurements. Sudden adjuster force
release can destroy calibration and possibly
result in damage to the tester.
To obtain adjuster force measurements of the
adjuster subassemblies installed onto the adjuster
pin, it is necessary to have either a force-calibrated
hydraulic shop press, or a calibrated spring pod, Fig-
ure 6-18, available for use with a standard arbor
press. Obtain force measurements as illustrated in
Figure 6-21.
J06025 10/06
1. Place the spring pod on the arbor press table.
FIGURE 6-21. CHECKING ADJUSTER FORCE
1. Arbor
2. Special Sleeve
3. Adjuster Pin
4. Adjuster Assemblies
Use a calibrated spring pod, with an arbor press
to check for required adjuster force slippage
between 173-362 kg (380-800 lbs). Slip adjuster
back and forth by alternate use of special
sleeves. Leave adjuster positioned on pin as
shown in View B for installation in piston subas-
sembly.
2. Apply force from the arbor slowly to observe
3. If slippage occurs between the specified force
Armature Speed Rear Disc Brakes
Use both special sleeves, Figures 6-26 as
shown in Views A and B of Figure 6-21 to slip
the adjuster back and forth several times on the
adjuster pin.
5. Special Sleeve B
6. Special Sleeve A
7. Calibrated Spring Pod
8. Arbor Press Table
that slippage occurs between the 173 and 362
kg (380 and 800 lbs) markings on the spring
pod.
limits, slip the adjuster to position on the pin as
shown in Figure 6-21, View B, and reinstall it
into the piston subassembly.
J6-17