320D and 323D Excavators Machine System Specifications Caterpillar

Pump Head (Main) - Drive

Usage:

320D A6F

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Illustration 1	g02790855

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Table 1
Specification for 256-0093 Pump Head Gp
Item	Qty	Part	Specification Description
Lubricate the sliding surfaces lightly with the hydraulic oil.
1	10	094-1882 Plug	Before assembly, apply blue Loctite High Flex GM to the threads.
			Torque to 13 ± 2 N·m (115 ± 18 lb in).
2	2	3J-1907 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.

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Illustration 2	g02790857

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Table 2
Specification for 256-0093 Pump Head Gp
Item	Qty	Part	Specification Description
3	1	285-4470 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
4	1	190-7674 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
5	1	173-3384 Piston	Before assembly, apply Loctite 241 to the threads of the piston. Torque to 350 ± 30 N·m (258 ± 22 lb ft).
6	1	190-7673 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
7	2	096-4878 Nut	Torque to 177 ± 15 N·m (131 ± 11 lb ft).
D	1	094-1875 Dowel	Extension of the dowel from the surface of the pin is 2.35 to 2.60 mm (0.093 to 0.102 inch).
8	1	273-8316 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
9	1	200-3244 Spring	Length under test force is 43.0 mm (1.69 inch).
			Test force is 100 ± 5 N (22 ± 1 lb).
			Free length after test is 47.200 mm (1.8583 inch).
10	1	200-3245 Spring	Length under test force is 33.5 mm (1.32 inch).
			Test force is 31.0 ± 1.6 N (7.0 ± 0.4 lb).
			Free length after test is 34.0 mm (1.34 inch).
11	1	099-3671 Spring	Length under test force is 14.5 mm (0.57 inch).
			Test force is 8.8 ± 0.7 N (2.0 ± 0.2 lb).
			Free length after test is 26.5 mm (1.04 inch).
12	As required, use the following shims in order to adjust the test force of the spring (13) for flow setting of the negative flow control (NFC):
	2	099-3669 Shim	Thickness is 1.0 mm (0.04 inch).
	2	099-6109 Shim	Thickness is 1.05 mm (0.041 inch).
	2	099-6110 Shim	Thickness is 1.1 mm (0.04 inch).
	2	099-6111 Shim	Thickness is 1.15 mm (0.045 inch).
	2	099-6112 Shim	Thickness is 1.2 mm (0.05 inch).
	2	099-6113 Shim	Thickness is 1.25 mm (0.049 inch).
	2	099-6115 Shim	Thickness is 1.3 mm (0.05 inch).
	2	099-6117 Shim	Thickness is 1.35 mm (0.053 inch).
	2	099-6118 Shim	Thickness is 1.4 mm (0.06 inch).
	2	099-6119 Shim	Thickness is 1.45 mm (0.057 inch).
	2	099-6120 Shim	Thickness is 1.5 mm (0.06 inch).
	2	099-6121 Shim	Thickness is 1.55 mm (0.061 inch).
	2	099-6122 Shim	Thickness is 1.6 mm (0.06 inch).
	2	099-6123 Shim	Thickness is 1.65 mm (0.065 inch).
	2	099-6124 Shim	Thickness is 1.7 mm (0.07 inch).
	2	099-6125 Shim	Thickness is 1.75 mm (0.069 inch).
	2	099-6126 Shim	Thickness is 1.8 mm (0.07 inch).
	2	099-6127 Shim	Thickness is 1.85 mm (0.073 inch).
	2	099-6128 Shim	Thickness is 1.9 mm (0.07 inch).
	2	099-3670 Shim	Thickness is 1.95 mm (0.077 inch).
13	1	200-3246 Spring	Length under test force is 42.5 mm (1.67 inch).
			Test force is 115.0 ± 5.8 N (25.9 ± 1.3 lb).
			Free length after test is 43.400 mm (1.7087 inch).
14	1	8T-4133 Nut	Torque to 45 ± 5 N·m (33 ± 4 lb ft).
15	1	200-3255 Nut	Torque to 100 ± 10 N·m (74 ± 7 lb ft).
16	1	273-8317 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
17	1	273-8318 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
18	3	189-9763 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.
19	1	273-8319 O-Ring Seal	Lubricate the bore lightly with the lubricant that is being sealed.