2006/01/02 Caterpillar

Track-Type Tractor:

D3G (S/N: CFC1-UP; CFF1-UP; JMH1-UP; BYR1-UP)

D4G (S/N: FDC1-UP; HYD1-UP; CFN1-UP; TLX1-UP)

D5G (S/N: WGB1-UP; RKG1-UP; FDH1-UP; FDW1-UP)

Service Magazine SEPD0877, 26 February 2007, "A New Hose Is Used for the Parking Brake". Disregard this article. See the replacement article that follows.

Description of Change: The tube for the parking brake function for Small Track-Type Tractors has been replaced. A new hose assembly replaces the tube. This hose assembly will improve service life and durability of the assembly.

The hose goes between the control valve (hydrostatic drive) and the brake in order to control the parking brake function of the machine.

This service magazine was revised only in order to correct the Product Structure links in the Service Information System (SIS).

Adaptable To: The 180-4603 Tube As has been replaced by the 280-8085 Hose As. The machine effectivity and machine adaptability for the new 280-8085 Hose As is listed in Table 1.

Table 1

Sales Model	Effectivity	Adaptability
D3G	S/N:BYR887-UP	S/N:BYR1-886
	S/N:	S/N:CFF1-UP
	S/N:	S/N:CFC1-UP
	S/N:JMH1430-UP	S/N:JMH1-1429
D4G	S/N:	S/N:FDC1-UP
	S/N:TLX635-UP	S/N:TLX1-634
	S/N:	S/N:CFN1-UP
	S/N:HYD1172-UP	S/N:HYD1-1171
D5G	S/N:	S/N:FDW1-UP
	S/N:RKG1412-UP	S/N:RKG1-1411
	S/N:	S/N:FDH1-UP
	S/N:WGB1759-UP	S/N:WGB1-1758

Required Parts for Installation

Table 2

Quantity	Part Number	Description
1	8T-4121	Hard Washer
1	6V-9168	Nut
1	8T-4196	Bolt (1)
1	8M-2773	Clip
1	280-8085	Hose As
1	6V-8980	Elbow
2	6V-8397	O-Ring Seals
1	284-1166	Plate As (2)
1	280-8157	Plate As (3)
2	095-1207	Nuts (2)
2	098-5747	Nuts (3)
1	8T-4137	Bolt (2) (3)

( 1 )	BYR, JMH, TLX, HYD, RKG and WGB models only
( 2 )	CFC and CFF models only
( 3 )	CFN, FDC, FDH and FDW models only

Installation of Hose

Illustration 1	g01223083
280-8085 Hose As (Top View)

Illustration 2	g01223084
280-8085 Hose As (Right Side View)

Illustration 3	g01223085
View B-B (1) 280-8085 Hose As. (2) 6V-8980 Elbow. (3) 6V-9168 Nut .

Installation Procedure 1

This procedure should be used for the following machines:

• BYR1-886

• JMH1-1429

• TLX1-634

• HYD1-1171

• RKG1-1411

• WGB1-1758

1. Remove the 180-4603 Tube As. This tube is part of the 174-9787 Control Valve Gp or the 214-6345 Control Valve Gp .

2. Remove the mounting components for the tube.

3. Install the new 280-8085 Hose As. Make sure that the hose has the proper orientation. Refer to Illustration 1 through Illustration 3.

Show/hide table



Illustration 4	g01223123

4. Install 8M-2773 Clip on the existing boss. If the tractor has the grade control system, use a 272-1777 Washer in order to prevent interference with existing lines for the grade control system. Refer to Illustration 4.

Installation Procedure 2

This procedure should be used for the following machines:

• CFC1-UP

• CFF1-UP

• CFN1-UP

• FDC1-UP

• FDH1-UP

• FDW1-UP

1. Remove the 180-4603 Tube As. This tube is part of the 174-9787 Control Valve Gp or the 214-6345 Control Valve Gp .

2. Remove the mounting components for the tube.

3. Install the new 280-8085 Hose As. Make sure that the hose has the proper orientation. Refer to Illustration 1 through Illustration 3.

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Illustration 5	g01223103

4. Install 284-1166 Plate As or 280-8157 Plate As. Mount the plate to the upper mounting studs for the track drive motor for the right side track. Do not remove the existing nuts. Slide the plate over the studs that protrude from the existing nuts. Secure the plate with two 095-1207 Nuts or two 098-5747 Nuts. Refer to Illustration 5.

5. Clip the hose to the plate. Use one 8M-2773 Clip, one 8T-4121 Hard Washer, and one 8T-4137 Bolt in order to secure the hose.