Loader Bobcat 773. Manual - part 7

ENGINE LUBRICATION SYSTEM

Checking Engine Oil

Check the engine oil level every day.

Before starting the engine for the work shift, open the rear
door. Remove the dipstick (Item 1) [A].

Keep the oil level between the marks on the dipstick.

Use a good quality motor oil that meets API Service
Classification of CD. (See Oil Chart below.)

Replacing Oil And Filter

See the SERVICE SCHEDULE Page 1–3 for the service
interval for replacing the engine oil and filter.

Run the engine until it is at operating temperature. Stop
the engine.

Open the rear door. Remove the drain plug (Item 1) [B].
Drain the oil into a container and dispose of used oil in an
environmentally safe manner.

Revised June 01

TEMPERATURE

 

RANGE

 

ANTICIPATED

 

BEFORE

 

NEXT

 

OIL

 

CHANGE

 

(DIESEL

 

ENGINES

 

MUST

 

USE

 

API

CLASSIFICATION

 

CD,

 

CF4,

 

CG4

 

)

 

*

 Can be used ONLY when available with appropriate diesel rating.

–40

SAE 10W–30

SAE 15W–40

SAE 30W

* 

SAE 5W–30

SAE 40W or 20W–50

SAE 20W–20

SAE 10W

RECOMMENDED

 

SAE

 

VISCOSITY

 

NUMBER

(LUBRICATION

 

OILS

 

FOR

 

DIESEL

 

ENGINE

 

CRANKCASE)

SYNTHETIC OIL Use recommendation from Synthetic Oil Mfgr.

C

°

–34

–29

–23

–18

–13

–7

–1

+4

+10

+15

+21

+27

+32

+38

+43 +49

F

°

–30

–20

–10

0

+10

+20

+30

+40

+50

+60

+70

+80

+90

+100 +110 +120

–40

A

P–10574

1

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773 BICS Loader

Service Manual

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P–10576

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ENGINE LUBRICATION SYSTEM (Cont’d)

Replacing Oil And Filter (Cont’d)

Remove the filler cap (Item 1) [B] from the oil fill tube.

Put 7.5 qts. (7,1 L) of oil in the engine. (See Oil Chart Page
1–18.)

Start the engine and let it run for several minutes. Stop the
engine. Check for leaks at the oil filter and check the oil
level. Add oil as needed if it is not at the top mark (Item
1) [C] on the dipstick.

Remove the oil filter (Item 1) [A].

Clean the filter housing surface. Put clean oil on the new
oil filter gasket. Install the filter and hand tighten.

Install and tighten the drain plug.

Always clean up spilled fuel or oil. Keep heat,
flames, sparks or lighted tobacco away from
fuel and oil. Failure to use care around
combustibles can cause explosion or fire
which can result in injury or death.

W–2103–1285

NOTE: Photo’s may appear different but the

procedure is the same.

Revised Jan. 99

A

P–10576

1

C

P–01575

1

773 BICS Loader

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Service Manual

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P–10572

1

ENGINE COOLING SYSTEM

Check the cooling system every day to prevent
over–heating, loss of performance or engine damage.

Wear safety glasses to prevent eye injury when
any of the following conditions exist:

W–2019–1285

Cleaning The Cooling System

Open the rear door and raise the rear grill.

Use air pressure or water pressure to clean the top of the
oil cooler [A].

Raise the oil cooler and clean the top of the radiator [B].

Check cooling system for leaks.

Lower the rear grill and close the rear door.

Checking The Coolant Level

Open the rear door.

Check the coolant level in the coolant recovery tank (Item
1) [C].

The coolant recovery tank must be 1/3 full.

Close the rear door before operating the loader.

•

When fluids are under pressure.

•

Flying debris or loose material is present.

•

Engine is running.

•

Tools are being used.

I–2124–0497

Always use the correct ratio of water to anti-
freeze. 

Too much antifreeze reduces cooling system
efficiency  and  may  cause   serious premature
engine damage. 

Too little antifreeze reduces the additives
which protect the internal engine compo-
nents; reduces the boiling point and freeze
protection of the system. 

Always add a premixed solution. Adding full
strength concentrated coolant can cause seri-
ous premature engine damage.

AVOID ENGINE DAMAGE

Revised Jan. 99

A

P–10607

C

P–10572

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773 BICS Loader

Service Manual

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P–10608

Open the rear door. Open the rear grill.

Remove the radiator cap (Item 1) [A].

Connect a hose to the engine block drain valve (Item 1)
[B]. Open the drain valve and drain the coolant into a
container.

After all the coolant is removed, close the drain valve.

Mix the coolant in a separate container. (See
SPECIFICATIONS for correct capacity, Page 9–1.)

ENGINE COOLING SYSTEM (Cont’d)

Replacing The Coolant

Do not remove radiator cap when the engine is
hot. You can be seriously burned.

W–2070–1285

Add premixed coolant, 47% water and 53% propylene
glycol to the recovery tank if the coolant level is low.

One gallon and one pint of propylene glycol mixed with
one gallon of water is the correct mixture of coolant to
provide a –34

°

F (–37

°

C) freeze protection.

Use a refractometer to check the ratio of propylene glycol
and water in your cooling system.

Fill the radiator with the premixed coolant. Install the
radiator cap.

Fill the coolant recovery tank 1/3 full.

Run the engine until it is at operating temperature. Stop
the engine. Check the coolant level in the recovery tank
when cool. Add coolant to the recovery tank as needed.

Lower the rear grill and close the rear door.

NOTE: The loader is factory filled with propylene

glycol coolant. (Purple Color) DO NOT mix
propylene glycol with ethylene glycol.

Revised Jan. 99

A

P–03964

1

I–2124–0497

Always use the correct ratio of water to anti-
freeze. 

Too much antifreeze reduces cooling system
efficiency  and  may  cause   serious premature
engine damage. 

Too little antifreeze reduces the additives
which protect the internal engine compo-
nents; reduces the boiling point and freeze
protection of the system. 

Always add a premixed solution. Adding full
strength concentrated coolant can cause seri-
ous premature engine damage.

AVOID ENGINE DAMAGE

773 BICS Loader

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Service Manual

B

P–10311

1