Battery charging condition can be checked by measuring battery terminal voltage with a digital voltmeter [A].

NOTICE
Be sure to disconnect the negative (–) cable first.
NOTE
Measure with a digital voltmeter which can be read one decimal place voltage.
If the reading is 12.8 V or more, refresh charge is not required, however, if the read is below the 12.8 V, refresh charge is required.
Battery Terminal Voltage Standard: 12.8 V or more
Terminal Voltage (V) [A] Battery Charge Rate (%) [B] Good [C] Refresh charge is required [D]

Interchange
Refreshing ChargeValve Installation
NOTICE
Do not lap the valve to the valve seat, using the
grinding compound. It will come off oxide film
treated surface of the valve.
Replace the oil seal with a new one.
Apply a thin coat of molybdenum disulfide grease to the
valve stem before valve installation.
Install the springs so ...
Thermostat Installation
Replace the O-rings [A] with new ones, and apply grease
to them.
Assemble:
O-rings
Thermostat Housing [B]
Thermostat [C]
Thermostat Cap [D]
Install the thermostat [A] in the housing so that the air
bleeder hole [B] is on top.
Tighten:
Torque - Thermostat Cap Bolts: 5.9 N ...
Oil Pressure Relief Valve Inspection
Remove the oil pressure relief valve (see Oil Pressure
Relief Valve Removal).
Check to see if the valve [A] slides smoothly when pushing
it in with a wooden or other soft rod, and see if it comes
back to its seat by spring [B] pressure.
NOTE
Inspect the valve in its assembled stat ...