Loader Bobcat 773. Instruction - page 8

ALTERNATOR BELT

Adjustment

Stop the engine.

Raise the operator cab. (See Page 1–9.)

Loosen the alternator mounting bolt (Item 1) [A].

Loosen the adjustment bolt (Item 2) [A].

Move the alternator until the belt has 5/16 inch (8,0 mm)
movement at the middle of the belt span with 15 lbs. (66
N) of force.

Tighten the adjustment bolt and mounting bolt.

Lower the operator cab.

FAN GEARBOX

See the SERVICE SCHEDULE Page 1–3 for the correct
service interval.

Checking And Maintaining

Raise the operator cab. (See Page 1–9.)

Remove the plug (Item 1) [C] to check the lubricant level.

If the level is low, add SAE 90W gear lube through the
check plug hole until the lubricant flows from the hole.

Install and tighten the plug.

Lower the operator cab. (See Page 1–10.)

Revised Jan. 99

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P–10323

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P–03975

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Gear Lube

Level

HYDRAULIC/HYDROSTATIC SYSTEM

Checking And Adding Fluid

Use only recommended fluid in the hydraulic system.
(See SPECIFICATIONS Page 9–1.)

Stop the loader on a level surface,

Lower the lift arms and tilt the Bob–Tach fully back.

Stop the engine.

Remove the dipstick (Item 1) [A].

The fluid level must be between the marks on the dipstick
[B].

If fluid is needed, remove the fill cap (Item 2) [A].

Clean the hydraulic reservoir fill screen [C].

Add the fluid as needed to bring the level to the top mark
on the dipstick [B].

Install the fill cap.

Replacing Hydraulic/Hydrostatic Filter

6.

See the SERVICE SCHEDULE Page 1–3 for the correct
service interval.

Open the rear door.

Remove the filter element (Item 1) [D].

Clean the surface of the filter housing where the element
seal contacts the housing.

Put clean oil on the rubber seal of the filter element.

Install and hand tighten the filter element.

Close the rear door before operating the loader.

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P–10600

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P–10318

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P–10303

Raise the operator cab. (See Raising The Operator Cab
Page 1–9.)

Disconnect the hose (Item 1) [B] from the case drain filter
located on the reservoir. Use a plug and cap on the filter
and case drain hose to prevent leakage.

Disconnect the hose (Item 1) [C] from the case drain filter
located on the left drive motor. Use a plug and cap on the
filter and case drain hose to prevent leakage.

Remove the case drain filters (Item 2) [B] & [C] and drain
the fluid into a container.

Replace the hydraulic/hydrostatic filter element. (See
Page 1–23.)

Replace both hydrostatic motor case drain filters (Item 2)
[B] & [C].

When all the fluid is removed from the reservoir,
reconnect the hose to case drain filter on the reservoir.

Add the correct fluid to the reservoir until the fluid level is
between the marks on the dipstick. DO NOT fill above the
top mark on the dipstick.

HYDRAULIC/HYDROSTATIC SYSTEM (Cont’d)

Replacing Hydraulic Fluid

See the SERVICE SCHEDULE Page 1–3, for the service
interval.

The fluid must also be replaced if it becomes
contaminated or after major repairs.

Remove the reservoir fill cap (Item 1) [A].

NOTE: Be sure the rubber gasket is installed on the

fill cap [A].

Hydraulic fluid escaping under pressure can
have sufficient force to enter a person’s body
by penetrating the skin and cause serious
injury and possibly death if proper medical
treatment by a physician familiar with this
injury is not received immediately.

W–2145–0290

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

Lower the operator cab.

Start the engine and operate the loader hydraulic
controls. Stop the engine and check for leaks.

Check the fluid level in the reservoir and add as needed.

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P–10597

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P–10602

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P–10603

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1

HYDRAULIC/HYDROSTATIC SYSTEM (Cont’d)

Breather Cap

See the SERVICE SCHEDULE Page 1–3, for the correct
service interval.

Raise the operator cab (See Raising The Operator Cab
Page 1–9.)

Remove the breather cap (Item 1) [A].

NOTE: Be sure the rubber gasket (Item 1) [B] is

installed on the fill cap.

Clean the filter (Item 2) [B] in the breather cap.

Be sure the baffle washer (Item 3) [B] is installed in the
hydraulic reservoir.

Replace the breather cap at regular intervals. (See the
SERVICE SCHEDULE Page 1–3.)

Lower the operator cab.

Revised Jan. 99

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P–10604

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P–10605

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