Generac Power Systems SD050 Owner'S Manual Download Page 16

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Maintenance

Gaseous Engine

Battery Size

Minimum CCA

2.4L

GRP 26

525

4.2L

GRP 24F

or GRP 27F

525

700

5.4L

GRP 24F, GRP 27F

or 2 X GRP 31

525

700

6.8L

12.9L

2 X GRP 31

or 2 GRP 8D

925

13.3L

Fill the battery with the proper electrolyte fluid if necessary and

have the battery fully charged before installing it.
Before installing and connecting the battery, complete the following

steps:
1. Set the generator's AUTO/OFF/MANUAL switch to OFF.

2. Turn off utility power supply to the battery charger circuit.

3. Remove the 10A and 15A fuses from the generator control

panel.

Battery cables were factory connected at the generator connection

points (Figure 1.4). Connect cables to battery posts as follows:
4. Connect the red battery cable (from starter contactor) to the

battery post indicated by a positive, POS or (+).

5. Connect the black battery cable (from frame ground) to the

battery post indicated by a negative, NEG or (—).

6. Reinstall the 10A and 15A fuses into their correct positions

inside the control panel.

7. Turn on the utility power supply to the battery charger circuit.
8. If the unit was previously operational turn the AUTO/OFF/

MANUAL switch back to the AUTO position.

Figure 1.4 – Battery Cable Connections

NOTE:

Damage will result if battery connections are made in reverse.

NOTE:

The generator is equipped with a battery trickle charger that is

active when the unit is set up for automatic operation. With the

battery installed and utility power source voltage available, the

battery receives a trickle charge while the engine is not run-

ning, to prevent self-discharge. The trickle charger is designed

to help extend the life of the battery by maintaining the battery

when the unit is not running. The trickle charge feature cannot

be used to recharge a discharged battery.

CHECK FLUIDS

An authorized operator should check the levels of engine oil, and

engine coolant monthly (or 10 hours). The oil level should be

maintained between the “FULL” and “ADD” marks on the engine

dipstick. Recommended fluids are listed are in the "Specifications"

section.
Check the engine oil as follows:
1. Locate the engine oil dipstick.
2. The most accurate oil level readings are measured when the

engine is cold. If the engine was running,

wait at least 10

minutes

before proceeding to the next step.

3. Remove the dipstick and wipe dry with a clean, lint free cloth.
4. The clean dip stick should be

slowly

inserted into the dip stick

tube. Visually confirm that the dip stick is fully seated in the

dip stick tube. A visual inspection is required because some

dip sticks will require more effort than others to fully seat.

5. After

10 seconds

have passed, remove the dip stick.

6. Look at the oil level on

both sides

of the dip stick. The

lower

of the two readings will be the correct oil level measurement.

7. Adjust the oil level accordingly. After adding or changing the

oil, the engine should run for one minute before checking the

oil level according to the above procedure starting at step 1.

You must wait the full 10 minutes to ensure that the oil has

fully drained into the oil pan.

Typical root causes of inaccurate oil level readings:
• Reading the high level of the dip stick.
• Reading the dip stick before the oil fully drains into the oil pan

(step #2).

• Inserting and removing the dip stick too quickly (step #5).
• Dip stick isn’t fully seated in the dip stick tube.

CHECK GEARBOX OIL (IF EQUIPPED)

Once annually (or at every 200 hour intervals), an authorized ser-

vice technician should completely drain and refill the gearbox (if so

equipped) using the following procedure (Figure 4.1):
1.  Remove panel fuse and negative battery cable.
2.  Remove the oil filler/vent cap.
3.  Remove the drain plug and drain the oil into an appropriate

container. Dispose of or recycle the oil properly.

4. Reinstall the oil drain plug.
5. To add oil to the gearbox, remove the oil level check plug.