120M Series 2 and 120M2 Motor Graders Machine Systems Caterpillar

Front Frame from Rear Frame (Articulating Hitch) - Separate

Usage:

Separation Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	155-3597	Wheel Chock	8
B	8S-7610	Base As	2
B	8S-7650	Cylinder As	2
C	8T-5255	Hydraulic Jack	1
D	1P-1837	Bearing Puller Adapter	1
	1P-1838	Bearing Puller Adapter	1
	6V-3170	Double Acting Cylinder	1
	4C-9634	Puller Stud	1
	4K-0684	Hard Washer	1
	350-7768	Electric Hydraulic Pump Gp	1
	9U-6832	Nut	1
	FT-2549	Sleeve	1
E	1P-1837	Bearing Puller Adapter	1
	1P-1838	Bearing Puller Adapter	1
	6V-3170	Double Acting Cylinder	1
	4C-9634	Puller Stud	1
	4K-0684	Hard Washer	1
	9U-6832	Nut	1
	350-7768	Electric Hydraulic Pump Gp	1
	8B-7555	Adapter	2
	0S-1602	Bolt	2
F	1U-9744	Floor Jack	1

Start By:

Remove the ripper.
Remove the drive shaft.

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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.

Lower the blade to the ground.

Turn the battery disconnect switch into the OFF position.

Refer to Operation and Maintenance Manual, "System Pressure - Release".

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Personal injury can result from contact with refrigerant.
Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.
Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.
Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.
Personal injury or death can result from inhaling refrigerant through a lit cigarette.
Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.
Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.

Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.

Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the correct procedure. Refer to Dealer Service Tool Catalog, NENG2500, "Air Conditioning Tools" for the correct tools.

Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the correct draining and filling procedures.

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Illustration 1	g02732179

Use Tooling (A) to chock front and rear wheels (1) .

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Illustration 2	g02730872

Install suitable blocking between front frame (2) and wheel lean bar (3). Install lock pin (4) .

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Illustration 3	g01363690

Remove cover (5) .

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Illustration 4	g02730897

Disconnect harness assemblies (6) and remove the connecting hardware. Disconnect hose assemblies (8), hose assemblies (8), and hoses (9) .

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Illustration 5	g02730907

Disconnect hose assemblies (10). Remove clamp (11).

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Illustration 6	g02730915

Disconnect bracket (12) and position the hose assemblies out of the way.

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Illustration 7	g02730910

Disconnect hose assemblies (13) and bracket (14) .

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Illustration 8	g02730920

Disconnect brackets (15). Disconnect hose assembly (16). Remove bolts (17). Remove cover (18) .

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Illustration 9	g02730944

Disconnect hose assemblies (19) and hose assembly (23). Remove clip (22) .

Remove cotter pin (20) and pin (21). Repeat this step for the opposite side.

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Illustration 10	g02730963

Remove covers (23A) .

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Illustration 11	g02731026

Disconnect hose assemblies (23) and hose assemblies (24) .

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Illustration 12	g02731029

Disconnect hose assemblies (25) and hose assemblies (26) .

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Illustration 13	g02731040

Disconnect ground strap (27). Remove clamp (28) .

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Illustration 14	g02731073

Disconnect links (29) .

Pull all the hose assemblies out of the front frame.

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Illustration 15	g02731089

Use Tooling (B) and suitable blocking to support front frame (30) .

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Illustration 16	g02731095

Use Tooling (C) to remove pin (31) .

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Illustration 17	g02731112

Remove bolts (32). Remove bolts (33). Remove lock plate (34) .

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Illustration 18	g02731115

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Illustration 19	g02731105

Remove shims (35) and spacer (36) .
Note: Note the quantity and the order of shims (35) for installation purposes.

Use Tooling (C) to remove pin (37) .

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Illustration 20	g02731123

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Illustration 21	g01427981
Typical Example

Position suitable cribbing under the front end of the rear frame. Position a suitable lift truck at the rear of the machine. Attach two suitable lifting devices onto the rear bumper and the forks. Remove Tooling (A) from the rear tires.

Use the suitable lift truck to separate the rear frame from the front frame.

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Illustration 22	g02731135

Use Tooling (D) to remove collar (38) .

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Illustration 23	g02731139

Use Tooling (E) in order to remove bearing sleeve (39) .

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Illustration 24	g02731145

Remove lip seals (40) .

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Illustration 25	g02731148

Use Tooling (D) to remove bearing (41) .

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Illustration 26	g02731152

Remove spacer (42). Remove bolts (43). Remove lower cap (44). Remove upper cap (45). Remove shims (46) .
Note: Note the quantity and the order of shims (46) for installation purposes.