Loader Bobcat 773. Instruction - page 72

ELECTRICAL SYSTEM INFORMATION

Description

The loader has a 12 volt, negative ground alternator
charging system. The electrical system is protected by
fuses (Item 1) [A] located in the engine compartment. The
fuses will protect the electrical system when there is an
electrical overload. The reason for the overload must be
found before starting the engine again.

Fuse Location

The electrical system for loaders is protected by eight
fuses located in the fuse block (Item 1) [B]. Remove the
fuse block cover to access the fuses.

The decal (Item 2 ) [A] inside the rear door specifies the
fuse sizes used in various loader circuits [C] & [D].

Do Not use silicone base sprays and/or
sealants on harness connectors or
components.

I–2123–0397

Revised June 01

C

6707786

A

P–03968

1

2

D

P–13771

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Service Manual

B

P–03965

1

BATTERY

Removal And Installation

Open the rear door.

Disconnect the negative (–) battery cable (Item 1) [A]
from the battery.

Disconnect the positive (+) cable (Item 1) [B] from the
battery.

Remove the battery holddown clamp (Item 1) [C].

Remove the battery from the loader [D].

Batteries contain acid which burns eyes and
skin on contact. Wear goggles, protective
clothing and rubber gloves to keep acid off
body.

In case of acid contact, wash immediately with
water. In case of eye contact get prompt medical
attention and wash eye with clean, cool water
for at least 15 minutes.

If electrolyte is taken internally drink large
quantities of water or milk! DO NOT induce
vomiting. Get prompt medical attention.

W–2065–1296

Revised Jan. 99

D

P–03873

C

P–03880

1

A

P–10335

1

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B

P–10336

1

BATTERY (Cont’d)

Removal And Installation (Cont’d)

Installation

Always clean the terminals and cable ends when
installing a new battery [A] & [B].

When installing the battery in the loader, do not touch any
metal parts with the battery terminal posts.

Connect and tighten the battery cables. Connect the
negative (–) cable last to prevent sparks.

Install the battery holddown clamp.

Servicing The Battery

The battery cables must be clean and the connections
tight. Remove acid or corrosion from the battery and
cables with a sodium bicarbonate (baking soda) and
water solution [C].

Clean the terminals and cable ends as shown in figure [A]
and [B].

Check the electrolyte level in the battery. Add distilled
water as needed.

Put battery saver P/N (6664458) or grease on the battery
terminals and cable ends to prevent corrosion.

Batteries contain acid which burns eyes and
skin on contact. Wear goggles, protective
clothing and rubber gloves to keep acid off
body.

In case of acid contact, wash immediately with
water. In case of eye contact get prompt medical
attention and wash eye with clean, cool water
for at least 15 minutes.

If electrolyte is taken internally drink large
quantities of water or milk! DO NOT induce
vomiting. Get prompt medical attention.

W–2065–1296

Revised Jan. 99

A

P–09589

B

P–09590

C

P–09588

–6–6–

773 BICS Loader

Service Manual

BATTERY (Cont’d)

Using A Booster Battery (Jump Starting)

Keep arcs, sparks, flames and lighted tobacco
away from batteries. When jumping
from
booster battery make final connection
(negative) at engine frame.

Do not jump start or charge a frozen or damaged
battery. Warm battery to 60

°

F. (16

°

C.) before

connecting to a charger. Unplug charger before
connecting or disconnecting cables to battery.
Never lean over battery while boosting, testing
or charging.

Battery gas can explode and cause serious
injury.

W–2066–1296

Batteries contain acid which burns eyes and
skin on contact. Wear goggles, protective
clothing and rubber gloves to keep acid off
body.

In case of acid contact, wash immediately with
water. In case of eye contact get prompt medical
attention and wash eye with clean, cool water
for at least 15 minutes.

If electrolyte is taken internally drink large
quantities of water or milk! DO NOT induce
vomiting. Get prompt medical attention.

W–2065–1296

Revised Jan. 99

If it is necessary to use a booster battery to start the
engine, BE CAREFUL! There must be one person in the
operator’s seat and one person to connect and
disconnect the battery cables.

The key switch must be in the OFF position. The booster
battery to be used must be 12 volt.

Connect the end of the first cable (Item 1) [A] to the
positive (+) terminal of the booster battery. Connect the
other end of the same cable (Item 1) [B] to the positive
terminal on the loader battery.

Connect the end of the second cable (Item 2) [A] to the
negative (–) terminal of the booster battery. Connect the
other end of the same cable (Item 2) [B] to the engine
ground cable.

Keep cables away from moving parts. Start the engine.

After the engine has started, remove the ground (–) cable
(Item 2) [B] first. Remove the cable from the positive
terminal on the loader battery.

B

P–03957

1

2

A

P–10644

1

2

Engine is operated with battery cables
disconnected.

Battery cables are connected when using a
fast charger or when welding on the loader
(Remove both cables from the battery).

Extra battery cables (booster cables) are
connected wrong.

I–2023–1285

Damage to the alternator can occur if:

773 BICS Loader

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Service Manual

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