Loader Bobcat 773. Manual - part 10

DRIVE BELT (Cont’d)

Adjusting The Drive Belt Equipped With The Fixed
Drive Idler (Cont’d)

Install the spring scale (MEL1406) on the tool handle. The
line of pull on the spring scale must be at a right angle or
perpendicular to the tool handle as shown [A].

NEW BELT: A new belt is one with a 1/2 hour or less of
operating time. With 15 lbs. (67 N) of force the tool should
move 1.250 inch (32 mm) (the width of the tool handle).

NOTE: The belt tension should be adjusted if a

tension check results in a reading of 8 lbs. (36
N) of force or less.

USED BELT: With 12 lbs. (53 N) of force, the tool should
move 1.250 inch (32 mm) (the width of the tool handle),
if not, readjust pulley tensioner.

NOTE: When a NEW belt is installed, run the engine

for approximately 5 minutes. Then the belt
tension must be checked and adjusted to 15
lbs. (67 N) spring scale force.

Revised Jan. 99

A

P–01660

–1–30–

773 BICS Loader

Service Manual

DRIVE BELT (Cont’d)

Adjusting The Drive Belt Equipped With The Spring
Loaded Drive Idler

To adjust the drive belt between the flywheel and the
hydrostatic pump pulley, use the following procedure:

Stop the engine. Open the rear door.

Disconnect the negative (–) battery cable.

Remove the belt shield holddown clips (Item 1) [A].

Remove the belt shield [B].

The pulley tensioner is located between the flywheel and
pump pulley.

Loosen the bolt (Item 1) [C] on the spring loaded drive
idler.

NOTE: The pointer (Item 2) [C] will be at the 1 o’clock

position when the idler is not under spring
tension.

Using the Belt Tensioner Bar (MEL1405) or a pry bar push
the idler assembly against the belt, the pointer (Item 1) [D]
will be at the 3 o’clock position when the idler stop is
bottomed out.

A

P–03967

1

C

P–08760

1

2

D

P–08762

1

773 BICS Loader

–1–31–

Service Manual

B

P–03969

DRIVE BELT (Cont’d)

Adjusting The Drive Belt Equipped With The Spring
Loaded Drive Idler (Cont’d)

Raise the idler assembly slightly so that the pulley is
operating on spring tension and not against the stop.

Tighten the mounting bolt (Item 1) [A] to 25–28 ft.–lbs.
(34–38 Nm) torque.

NOTE: Do not set the idler against the travel stop in

the 3 o’clock position.

Run the engine for a few minutes.

Stop the engine and recheck the pointer position.

Readjust if necessary.

After the idler has been in service, readjust when the
pointer reaches the 1 o’clock position.

Install the belt shield using the fasteners.

Reconnect the negative (–) battery cable.

Close the rear door.

Drive Belt Replacement

Stop the engine. Open the rear door.

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

Remove the negative (–) cable from the battery. The
battery may be removed for additional working clearance.
(See Page 6–1.)

Remove the belt shield fasteners. Remove the belt shield
[B].

Remove the fan drive belt (Item 1) [C].

The belt tensioner is located between the flywheel and
pump pulley. Loosen and remove the bolt (Item 2) [C]
from the belt tensioner.

Remove the belt tensioner assembly.

Remove the drive belt from the pump pulley and flywheel.
Remove the drive belt from the loader [D].

Install the new drive belt. Install the belt tensioner
assembly.

Install the fan drive belt.

Adjust the drive belt. (See Page 1–29 or 31.)

Reinstall previously removed components and connect
the negative (–) cable to the battery.

A

P–08761

1

C

P–08760

1

2

D

P–04064

–1–32–

773 BICS Loader

Service Manual

B

P–03969

LUBRICATION OF THE BOBCAT LOADER

7.

Lubricate the loader as specified in the SERVICE
SCHEDULE, Page 1–3, for the best performance of the
loader.

Record the operating hours each time you lubricate the
Bobcat loader.

Always use a good quality lithium based multi–purpose
grease when you lubricate the loader. Apply lubricant until
extra grease shows.

Lubricate the following locations on the loader:

1. Stabilizer Rod – Front (Both Sides) [A]

2. Stabilizer Rod – Rear (Both Sides) [B].

3. Lift Cylinder Rod End (Both Sides) [B].

4. Lift Cylinder Base End (Both Sides) [B].

5. Tilt Cylinder Base End [C].

Revised Jan. 99

A

P–10619

1

C

P–10622

5

773 BICS Loader

–1–33–

Service Manual

B

P–10620

2

3

4

P–10640