988K XE Wheel Loader Machine Systems Caterpillar

Boom - Remove and Install

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	284-5122	Stands	2
B	9U-6751	Receiving Sleeve As	1
	9U-6809	Nut	1
	316-1489	Cylinder	1
	350-7768	Electric Hydraulic Pump Gp 115V	1
	350-7769	Electric Hydraulic Pump Gp 230V	1
	9U-6811	Puller Stud	1
C	237-9180	Receiving Sleeve As	1
	4C-6504	Puller Rod	1
	9U-6800	Nut	1
	5P-2501	One-Piece Flange	1
	350-7769	Electric Hydraulic Pump Gp 230V	1
	350-7769	Electric Hydraulic Pump Gp 115V	1
D	4C-9544	Pin Driver	1
E	-	Loctite 271	-
F	8T-9584	Oil	-
G	5P-0960	Grease Cartridge	-

Start By:

Remove bucket
Remove bucket link
Remove tilt link
Remove tilt cylinder

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When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.

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Illustration 1	g03425465

Position Tooling (A) under boom (1). The weight of boom (1) is approximately 3629 kg (8000 lb).
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Illustration 2 g03426150
Attach a suitable lifting device to lift cylinder (2). The weight of cylinder (2) is approximately 726 kg (1600 lb).
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Illustration 3 g03426154
Remove bolt (3).
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Illustration 4 g03426158
Attach a suitable lifting device to Tooling (B). The weight of Tooling (B) is approximately 136 kg (300 lb). Install Tooling (B) onto pin assembly (4). The weight of Tooling (B) and pin assembly (4) are approximately 181 kg (400 lb). Remove Tooling (B) and pin assembly (4). Lower lift cylinder (2) on to suitable cribbing.
Repeat Steps 2 through 4 for the opposite side.
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Illustration 5 g03424951
Remove bolts (5) and cover (6). Disconnect harness assemblies (7).
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Illustration 6 g03426200
Attach a suitable lifting device to boom (1). The weight of boom (1) is approximately 3629 kg (8000 lb).
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Illustration 7 g03424981
Attach a suitable lifting device to Tooling (C). The weight of Tooling (C) is approximately 136 kg (300 lb). Install Tooling (C) onto pin assembly (8). The weights of Tooling (C) and pin assembly (8) are approximately 181 kg (400 lb). Remove Tooling (C), pin assembly (8).
Repeat Step 8 for the opposite side.
Remove boom (1).

Installation Procedure

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Illustration 8	g03485498

Note: Use Illustration (8) as a guide for the pins and the pin joints that are being referenced in this procedure.

Install boom (1) in the reverse order of removal.
1. Check and replace lip seals if necessary. If replacing the lip seal, apply Tooling (E) to the bore.
2. Lubricate the diameter of A-pin (4) with Tooling (F). Use Tooling (D) to install A-pin (4). Add Tooling (G) through grease hardware until lubricant extrudes from seal.
3. Lubricate the diameter of K-pin (8) with Tooling (F). Use Tooling (D) to install K-pin (8). Add Tooling (G) through grease hardware until lubricant extrudes from seal.