Generac Power Systems 004916-0 用户手册
16
Section 4 — Maintenance
Air-cooled 11 kW Generators
Figure 4.5 – Setting the Spark Plug Gap
4.7 BATTERY
MAINTENANCE
The battery should be inspected per the “Service
Schedule,” Section 4.13. The following procedure
should be followed for inspection:
Schedule,” Section 4.13. The following procedure
should be followed for inspection:
1. Inspect the battery posts and cables for tightness
and corrosion. Tighten and clean as necessary.
2. Check the battery fluid level of unsealed batteries
and, if necessary, fill with Distilled Water Only. Do
not use tap water in batteries.
not use tap water in batteries.
3. Have the state of charge and condition checked.
This should be done with an automotive-type bat-
tery hydrometer.
tery hydrometer.
DANGER
Do not dispose of the battery in a fire. The
battery is capable of exploding.
A battery presents a risk of electrical shock
and high short circuit current. The following pre-
cautions are to be observed when working on
batteries:
cautions are to be observed when working on
batteries:
• Remove the 7.5A and 15A fuses from the genera-
tor control panel.
• Remove watches, rings or other metal objects;
• Use tools with insulated handles;
• Wear rubber gloves and boots;
• Do not lay tools or metal parts on top of the
• Use tools with insulated handles;
• Wear rubber gloves and boots;
• Do not lay tools or metal parts on top of the
battery; and
• Disconnect charging source prior to connecting or
disconnecting battery terminals.
Do not open or mutilate the battery. Released
electrolyte has been known to be harmful to the
skin and eyes, and to be toxic.
skin and eyes, and to be toxic.
The electrolyte is a dilute sulfuric acid that is
harmful to the skin and eyes. It is electrically
conductive and corrosive. The following
procedures are to be observed:
conductive and corrosive. The following
procedures are to be observed:
• Wear full eye protection and protective clothing;
• Where electrolyte contacts the skin, wash it off
• Where electrolyte contacts the skin, wash it off
immediately with water;
• Where electrolyte contacts the eyes, flush
thoroughly and immediately with water and seek
medical attention; and
medical attention; and
• Spilled electrolyte is to be washed down with an
acid neutralizing agent. A common practice is to
use a solution of 1 pound (500 grams) bicarbonate
of soda to 1 gallon (4 liters) of water. The bicar-
bonate of soda solution is to be added until the
evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.
use a solution of 1 pound (500 grams) bicarbonate
of soda to 1 gallon (4 liters) of water. The bicar-
bonate of soda solution is to be added until the
evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.
Lead-acid batteries present a risk of fire because
they generate hydrogen gas. The
following procedures are to be followed:
following procedures are to be followed:
• DO NOT SMOKE when near the battery;
• DO NOT cause flame or spark in battery area; and
• Discharge static electricity from body before touch-
• DO NOT cause flame or spark in battery area; and
• Discharge static electricity from body before touch-
ing the battery by first touching a grounded metal
surface.
surface.
Be sure the AUTO/OFF/MANUAL switch is set to
the OFF position before connecting the battery
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as the
battery cables are connected.
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as the
battery cables are connected.
Be sure the utility power supply is turned off
and the 5A and 15A fuses are removed from the
generator control panel, or sparking may occur
at the battery posts as the cables are attached
and cause an explosion.
generator control panel, or sparking may occur
at the battery posts as the cables are attached
and cause an explosion.
4.8
ADJUSTING GT-990 VALVE
CLEARANCE
CLEARANCE
After the first six months of operation, adjust the
valve clearance in the engine (Figure 4.6).
valve clearance in the engine (Figure 4.6).
Important: If feeling uncomfortable about doing
this procedure or the proper tools are not available,
please contact the Authorized Dealer for service
assistance. This is a very important step to insure
longest life for the engine.
this procedure or the proper tools are not available,
please contact the Authorized Dealer for service
assistance. This is a very important step to insure
longest life for the engine.
To adjust valve clearance:
• Make sure the engine is at room temperature
(between 60° and 80° F).
• Make sure that the spark plug(s) are removed.
• Remove the four screws attaching the valve cover
• Remove the four screws attaching the valve cover
with a #2 or #3 phillips screwdriver.
• Make sure the piston is at Top Dead Center (TDC)
of its compression stroke (both valves closed). To
get the piston at TDC, remove the screen at the top
of the intake scroll to gain access to the intake fan.
Rotate the engine by hand by rotating the fan while
watching the piston through the spark plug hole.
The piston should move back and forth. The pis-
ton is at TDC when it is as forward as it can go.
get the piston at TDC, remove the screen at the top
of the intake scroll to gain access to the intake fan.
Rotate the engine by hand by rotating the fan while
watching the piston through the spark plug hole.
The piston should move back and forth. The pis-
ton is at TDC when it is as forward as it can go.