Loader Bobcat 773. Manual - part 124

HYDRAULIC CONTROL VALVE (Cont’d)

Auxiliary Spool

Remove the end cap screws (Item 1) [A] & [B].

Installation: Tighten the screws to 90–100 in.–lbs.
(10,2–11,3 Nm) torque.

Remove the end cap (Item 2) [A] & [B], O–ring (Item 3)
[A] & [B].

Remove the large spring (Item 4) [A]  &  [B] and small
spring (Item 5) [A] & [B].

Remove the spring retainer (Item 6) [A] & [B].

Remove the auxiliary spool (Item 1) [C].

A

N–17281

1

2

3

6

5

4

C

N–17263

1

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773 BICS Loader

Added June 01

B

N–17264

1

2

3

6

5

4

HYDRAULIC CONTROL VALVE (Cont’d)

Auxiliary Electrical Solenoid

Remove the nut (Item 1) [A] from the end of the solenoid.

Installation: Tighten the nut to 9–12 in.–lbs. (1,02–1,36
Nm) torque.

Remove the metal housing (Item 1) [B], coil (Item 2) [B],
and end plate (Item 3) [B].

Remove the electric solenoid valve (Item 4) [B].

Installation: Tighten the solenoid valve to 96–144
in.–lbs. (10,8–16,3 Nm) torque.

Installation: Always install new O–rings and back–up
washers on the solenoid valve [C].

A

N–17265

1

C

N–17269

Service Manual

–10–61–

773 BICS Loader

Added June 01

B

N–17267

1

2

3

4

C

P–13746

HYDRAULIC CONTROL VALVE (Cont’d)

Spool Seal Installation

To install new spool seals when the centering spring is not
removed from the spool, use the following procedure:

Check the seal surface area in the control valve (Item 1)
[A] for rust, corrosion, scratches, etc. Correct any
irregularities before continuing.

Put plastic material (Example: Plastic food wrap) on the
valve spool [B].

Put clean oil on the spool seal. Install the spool seal (Item
1) [B] on the spool. Be careful not to damage the seal on
the sharp edges.

Remove the plastic material.

Install the spool into the control valve.

Install the linkage end spool seal [C] into the control valve
(Item 1) [D].

Be careful not to damage the spool seal.

Install the O–ring (Item 2) [D].

Continue assembling the control valve.

NOTE: Seal must be installed with lip face toward

valve body. Lift face has largest outside
diameter.

A

N–17491

1

D

N–17492

1

2

–10–62–

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773 BICS Loader

Added June 01

B

CD–15080

1

HYDRAULIC CONTROL VALVE (Cont’d)

H–Port Auxiliary Section

Loosen the plug (Item 1) [A].

Installation: Tighten the plug to 35–40 ft.–lbs. (47–54
Nm) torque.

Remove the plug from the control valve [B].

Depending on the application of the auxiliaries, the control
valve may be equipped with a port relief valve (Item 1) [C].

If so equipped, remove the port relief from the control
valve [D].

Installation: Replace the O–rings and back–up washers.
Tighten the port relief valve 35–40 ft.–lbs. (47–54 Nm)
torque.

A

N–17265

1

D

N–17284

C

N–17474

1

Service Manual

–10–63–

773 BICS Loader

Added June 01

B

N–17266