2002/12/02 The Lines for the Hoist Cylinders Have Been Updated in Order to Protect the Hoist Valve {5057} Caterpillar

The Lines for the Hoist Cylinders Have Been Updated in Order to Protect the Hoist Valve {5057}

2002/12/02 [SEPD0658]

2002/12/02 Procedure to Install the Parking Brake Reset Valve {4267}

2002/12/02 The Parts Manuals Now Include Additional Parts for the 155-9923 Saw Motor {5575}

HYDRAULIC SYSTEM

LINES GP-HOIST

2002/12/02 The Lines for the Hoist Cylinders Have Been Updated in Order to Protect the Hoist Valve {5057}

Off-Highway Truck/Tractor:
776D (S/N: AFS1-UP)
777D (S/N: AGC1-UP)
777D HAA (S/N: AGY1-UP)

Description of Change: The lines for the hoist cylinders have been updated. A guard has been added. The guard will protect the hoist valve from debris from the front tires. The lines have been changed in order to avoid interference with the guard.

Adaptable To: The updated 169-3781 Hoist Oil Lines Gp is effective with (S/N: AGC1064-UP; AGY81-UP; AFS81-UP). All older machines can be adapted to the new type. The 169-3781 Hoist Oil Lines Gp is serviced only by parts. Refer to the following information.

Parts for Removal

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Illustration 1	g00917067

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Table 1
Ref No	Qty	Part Number	Description
1	2	173-0284	Block
1	2	4J-0524	O-Ring Seal
2	1	173-0285	Hose As
2	2	4J-0520	O-Ring Seal
3	1	173-0286	Hose As
3	2	4J-0520	O-Ring Seal
4	1	173-0287	Hose As
4	2	4J-0520	O-Ring Seal
5	1	173-0288	Hose As
5	2	4J-0520	O-Ring Seal
6	4	1P-4577	Half Flange
7	2	5J-3399	Connector Plate
7	2	4J-0524	O-Ring Seal
8	8	5J-5794	Bolt
9	1	5P-7468	Clip
10	1	5P-7469	Clip
11	1	5P-8444	Grommet
12	8	5S-7382	Bolt
13	8	8T-4896	Hard Washer

Parts for Installation

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Illustration 2	g00917080
Guard (6) is removed in the enlarged view.

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Table 2
Ref No	Qty	Part Number	Description
1	1	173-0286	Hose As
1	2	4J-0520	O-Ring Seal
2	1	217-3404	Manifold
2	2	4J-0524	O-Ring Seal
3	1	218-2659	Plate
3	2	4J-0524	O-Ring Seal
4	1	218-3777	Hose As
4	2	4J-0520	O-Ring Seal
5	1	218-3778	Hose As
5	2	4J-0520	O-Ring Seal
6	1	219-6037	Guard
7	1	221-2791	Hose As ⁽¹⁾
	1	2P-1801	Stem
	2	3S-7252	Sleeve
	1	5S-2105	Stem
	1	165-0021	Hose ( 112 cm (44.1 inch))
	2	4J-0520	O-Ring Seal
8	2	3D-2824	O-Ring Seal
9	2	3J-1907	O-Ring Seal
10	4	5P-1076	Hard Washer
11	1	5P-7466	Clip
12	1	5P-7467	Clip
13	1	5P-8112	Grommet
14	2	6V-0484	Elbow
15	1	6V-8637	Seal Connector
16	1	6V-9007	Elbow
17	2	6V-9746	O-Ring Seal
18	8	8M-2530	Bolt (12 Point)
19	4	8T-8917	Bolt
20	6	9S-9739	Bolt (12 Point)

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The 221-2791 Hose As is nonserviceable. The hose assembly can be fabricated with the parts that are shown below the hose assembly. Refer to Special Publications, PECP5030, "Hydraulic Hose and Coupling Reference Guide" for more information regarding the fabrication of hose assemblies.