Komatsu 830E-AC Shop Manual page 209

FIGURE 2-11. CHECKING PINION CLEARANCE
Pinion Clearance
To adjust pinion clearance, follow the steps listed
below.
1. Make connections as shown in Figure 2-10.
2. Momentarily flash a jumper lead from terminal
"G" to terminal "MTR". The drive will now shift
into cranking position and remain so until the
batteries are disconnected.
3. Push the pinion or drive back towards the com-
mutator end to eliminate slack movement.
4. The distance between the drive pinion and
housing should be between 8.3 mm to 9.9 mm
(0.330 to 0.390 in.) as shown in Figure 2-13.
5. Adjust clearance by turning shaft nut (64, Fig-
ure 2-6).
D02034
MAGNETIC SWITCH
The magnetic switch is a sealed unit and not repair-
able.
FIGURE 2-12. MAGNETIC SWITCH ASSEMBLY
Removal
1. Remove battery power as described in Crank-
ing Motor Removal.
2. Disconnect cables from the switch terminals
and wires from coil terminals (Figure 2-12).
NOTE: If the magnetic switch being removed has a
diode across the coil terminals, mark the leads prior
to removal to ensure correct polarity during
installation.
3. Remove mounting cap screws and washers.
Remove switch from mounting bracket.
4. The switch coil circuit can be tested as
described below.
Installation
1. Attach magnetic switch to the mounting bracket
using the cap screws and lockwashers removed
previously.
2. Inspect cables and switch terminals. Clean as
required and install cables.
3. Install the diode across the coil terminals. Be
certain diode polarity is correct. Attach wires
from the truck harness to the coil terminals (See
Figure 2-5).
4. Connect battery power as described in Crank-
ing Motor "Installation".
24 VDC Electric Supply System D2-19