Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Machine Systems Caterpillar

Steering Motor - Disassemble

Usage:

45 1DR

Disassembly Procedure for (S/N: 8DN1-619; 1DR1-1393; 7DM1-640)

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Table 1
Required Tools
Tool	Part Number	Description	Qty
A	1P-5546	Crossblock	1
	5F-7366	Forcing Screw	1
		Threaded Rod	2
	8T-1757	Nut	2
	5P-8247	Hard Washer	2
	8S-1596	Socket	1
B	1P-1854	Retaining Ring Pliers	1
C	5F-7465	Puller	1
		Threaded Rod	2
	6V-8225	Nut	2
	5P-0537	Hard Washer	2
D	136-1452	Internal Tip Pliers	1
E	6F-3011	Spanner Wrench	1
F	7H-1941	Block	1
G	6V-2012	Depth Micrometer	1
H		Outside Micrometer	1
J	8T-7681	Seal Driver	1
K	8T-7666	Seal Guide	1
L	6V-8225	Nut	2
		Threaded Rod	2
	5P-0537	Hard Washer	2
M	6V-2315	Bolt	2

Start By:

Remove the steering motor. Refer to Disassembly and Assembly, "Steering Motor - Remove".

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Illustration 1	g00700479

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Illustration 2	g00700486

Mark four bolts (1) for installation purposes.

Remove plate (4) from head (2) .

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Illustration 3	g00700514

If necessary, remove sleeve (6) and dowel (5) from head (2) .

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Illustration 4	g00700519

If necessary, remove flush valve (7) from head (2) . If necessary, remove the plug, O-ring (9) and valve assembly (8) from head (2) .

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Illustration 5	g00700524

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Illustration 6	g00700526

Install Tooling (A) , as shown. If necessary, use a strap in order to support cylinder barrel (14) upward. Use Tooling (A) in order to push spacer (11) downward and compress spring (12) . Use Tooling (B) in order to remove snap ring (10) . Loosen the center screw of Tooling (A) and remove Tooling (A) .

Remove four bolts (16) . Remove plate (17) , seven pistons (18) and seven retainers (19) as a unit from housing (3) .

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Illustration 7	g00700531

Remove O-ring (21) . Remove six bolts and washers (20) from cover (22) .

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Illustration 8	g00700535

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Illustration 9	g00700552

Install Tooling (C) and remove cover (22) , seal (23) and ring (24) from housing (3) .

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Illustration 10	g00700554

If necessary, remove seal (25) from cover (22) .

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Illustration 11	g00700555

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Illustration 12	g00700558

Apply heat to a temperature of 150° C (300.0° F) to set screws (26) and (27) . Remove the set screws from housing (3) .

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Illustration 13	g00700563

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Illustration 14	g00700558

Use a soft faced hammer and tap on the end of input shaft (28) until there is clearance behind snap ring (29) .

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Illustration 15	g00700560

Use Tooling (D) and remove snap ring (29) from housing (3) .
Note: In order to make correct adjustments for assembly, the original snap ring (29) or a new snap ring with the same thickness must be used.

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Illustration 16	g00700558

Use a soft brass drift in order to remove input shaft (28) from housing (3) . If necessary, use a suitable puller if the rotating group is tight in the housing.