Loader Bobcat 773. Manual - part 35

CONTROL INTERLOCK LINKAGE (Pedal or
Mechanical Hand)

Removal And Installation

Remove the lock nuts (Item 1) [A] from the interlock
shield (Item 2) [A].

Installation:  Tighten the lock nuts to 25–28 ft.–lbs.
(34–38 Nm) torque.

Remove the interlock shield (Item 2) [A] from the
interlock.

Remove the lock nuts and plastic washers (Item 1) [B]
from the interlock bolts.

Installation: Tighten the interlock nut to 84–96 in.–lbs.
(9,5–10,8 Nm) torque.

Remove the spring (Item 1) [D] from under the interlock
block (Item 2) [B].

Remove the interlock.

Remove the plastic washers (Item 1) [C] which are
located between the interlock and the fender.

Installation:  During installation be sure to keep the
interlock pressed against the loader frame so the plastic
washers (Item 2) [D] do not fall off the collar of each lock
nut. If the washer does not sit properly over the collar on
the lock nut, it will become wedged between the fender
and the lock nut.

After installation, inspect the seat bar operation. (See
Page 1–1.)

Revised Jan. 99

A

P–04048

1

2

C

P–04050

1

D

P–04049

2

1

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B

P–04046

2

1

CONTROL INTERLOCK LINKAGE (Pedal or
Mechanical Hand) (Cont’d)

Adjustment

Check the interlock linkages (Item 1) [A] so they are free
and lock both controls (pedal or mechanical hand) when
in neutral, (shown with interlock shield removed).

Check to ensure the locking tab (Item 2) [A] is centered
in the slot (Item 1) [A].

If not, loosen the tab mounting nuts (Item 3) [A] and bolts.
Center the tab in the slot.

Installation: Tighten the mounting nuts and bolts to 25
ft.–lbs. (34 Nm) torque.

With the controls in neutral the locking tabs must fit into
the slot of the interlocks as shown [B], when adjusted
properly.

Revised Jan. 99

W–2104–0199

Adjust locking tabs on control linkage so that
lift and tilt control pedals or (Mechanical Hand
controls) are locked in neutral when the seat
bar is up.

AVOID INJURY OR DEATH

A

P–04052

3

2

1

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B

P–04051

LIFT LOCK BY–PASS VALVE

Removal And Installation (S/N 509640660 & Above

S/N 509616542 & Above)

Install jackstands under the rear corners of the loader.

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

Drain the hydraulic fluid reservoir. (See Page 2–84.)

The lift lock by–pass valve (Item 1) [A] is located under

the right side of the control panel.

Remove the engine speed control. (See Page 7–1.) This

procedure is optional.

NOTE: Photo’s may appear different but the

procedure is the same.

If you choose not to remove the engine speed control and

control panel, the lift arm by–pass control knob (Item 2)

[A] will need to be removed from the control panel.

Hold the by–pass control knob (Item 2) [A] and loosen the

jam nut (Item 3) [A] on the by–pass valve shaft.

Remove the by–pass control knob and jam nut from the

valve shaft.

Remove the rubber washer (Item 4) [A].

Disconnect the two hoses (Item 1) [B] from the lift lock

by–pass valve (Item 1) [A].

When repairing hydrostatic and hydraulic
systems, clean the work area before
disassembly and keep all parts clean. Always
use caps and plugs on hoses, tubelines and
ports to keep dirt out. Dirt can quickly damage
the system.

I–2003–0888

Never work on a machine with the lift arms up
unless the lift arms are secured by an approved
lift arm support device. Failure to use an
approved lift arm support device can allow the
lift arms or attachment to fall and cause injury
or death.

W–2059–0598

Revised Jan. 99

Raise the loader lift arms and install an approved lift arm

support device. (See Page 1–1.)

A

N–15060

2

3

4

1

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B

N–15067

1

1

LIFT LOCK BY–PASS VALVE (Cont’d)

Removal And Installation (S/N 509640660 & Above
S/N 509616542 & Above) (Cont’d)

Remove the two mounting bolts and nuts (Item 1) [A] from
the lift lock by–pass valve.

Installation: Tighten the two mounting bolts and nuts to
180–200 in.–lbs. (21–23 Nm) torque.

Refer to Page 8–1 for lift arm by–pass control inspection
procedure.

Reverse the removal procedure to install the lift lock
by–pass valve in the loader.

Disassembly And Assembly (S/N 509640660 & Above
S/N 509616542 & Above)

Remove the by–pass valve (Item 1) [B] from the valve
block. Inspect the by–pass valve for damage and replace
if necessary.

Installation: Tighten the valve to 33–37 ft.–lbs. (45–50
Nm) torque.

Inspect the hydraulic fittings on the valve block for
damage and replace if necessary.

Added Jan. 99

B

N–00927

1

A

N–15068

1

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Service Manual