Spark Plug Inspection; Battery Charger - Husqvarna NUDA 900 R 2012 Workshop Manual

NUDA 900 2012/2013 - NUDA 900 R 2012/2013
INDICATIVE CHARGE TIMES DEPENDING ON BATTERY CHARGE STATUS
AT REST VOLTAGE * (V)
> 12.7
~ 12.5.
~ 12.2
~ 12.0
~ 11.8
Workshop Manual Ed. 11-2011
ELECTRICAL SYSTEM
Spark plug
Check electrode gap "A" (0.8 ÷ 0.9 mm) (0.0315. ÷ 0.035.4 in.). A wider gap may
cause difficulties in starting the engine and overload the coil. A gap that is too
narrow may cause difficulties when accelerating, when idling or poor performance
at low speed. Clean off any dirt around spark plug base before removing the
spark plug. It is good practice to closely inspect the spark plug after removal,
as any deposits on it and the colour of the insulator provide useful indications
on spark plug heat rating, carburetion, ignition and the general condition of the
engine. Before refitting the spark plug, accurately clean the insulator with a wire
brush. Smear some graphite grease on spark plug thread, do it fully home finger
tight then tighten it to 11 Nm - 1.1 Kgm - 8.11 ft/lb. Loosen the spark plug then
tighten it again to 11 Nm - 1.1 Kgm - 8.11 ft/lb. Spark plugs which have cracked
insulators or corroded electrodes should be replaced.
Battery
The battery (1) is a sealed-for-life, maintenance-free battery. If the vehicle
remains unused for long periods, it is recommended to disconnect the battery
from the electrical system and store it in a dry place. After an intensive use of
the battery, it is advisable to carry out a standard slow charging cycle (0.6A for
8 hours for 12V-12Ah battery).
Quick charging is advised only in situations of extreme necessity since the life
of lead elements is drastically reduced by such cycle (6A for 0.5. hours for 12V-
12Ah battery).

Battery charger

To gain access to the battery (1):
- remove the protection panel (as described in the relevant paragraph);
- first remove the BLACK negative cable, then the RED positive cable (when reas-
1
sembling, first connect the RED positive cable, then the BLACK negative cable);
- remove the battery (1) from its housing.
Use a voltmeter to ensure that the battery voltage is not lower than 12.5.V. If it is
H10485
not so, the battery needs to be charged. Using a battery charger with a constant
voltage, first connect the RED positive cable to the battery positive terminal then
the BLACK negative cable to the battery negative terminal. At a constant voltage
level of 14.4 V, apply "x" Amps according the battery's charge percentage as
indicated in the table below. The voltage reaches a constant value only after a
few hours, therefore it is suggested NOT to measure it immediately after hav-
ing charged or discharged the battery. Always check the battery charge before
reinstalling it on the vehicle. The battery should be kept clean and the terminals
coated with grease.
% CHARGE CHARGE DURATION (THE RATED CURRENT IN AMPERE
100
75.
5.0
25.
0
TO BE APPLIED: 0.1x BATTERY RATED CAPACITY)
_
4h
7h
11h
14h
M.24