725, 730, 730 EJECTOR, 735, 740 and 740 EJECTOR Articulated Trucks Automatic Lubrication System Caterpillar

The automatic lubrication system is designed to lubricate all grease points that are connected to the automatic lubrication system. Lubrication is delivered on a timed cycle with a predetermined quantity of grease.

The automatic lubrication system consists of the following major components.

• Lubrication pump with integrated control unit.

• Lubrication distribution valves with individual metering units for each grease point.

• An interactive control in the cab with an Independent Signal Lamp.

Components of the Automatic Lubrication System

Illustration 1	g01149227
725, 730 and 730 EJECTOR Articulated Trucks (1) Lubrication Pump (2) Lubrication Distribution Valve (12 port) (3) 3/8" High-Pressure Hose (Primary Grease Line) (Two of) (4) 1/4" High-Pressure Hose (Primary Grease Line) (Two of) (5) 3/8" High-Pressure Hose (Primary Grease Line) (Two of) (6) Lubrication Distribution Valve ("7" port) (7) Lubrication Distribution Valve ("7" port) (8) Pressure Switch

Illustration 2	g01149229
735, 740, and 740 EJECTOR Articulated Trucks. (1) Lubrication Pump (2) Lubrication Distribution Valve (12 port) (3) 3/8" High-Pressure Hose (Primary Grease Line) (Two of) (4) 1/4" High-Pressure Hose (Primary Grease Line) (Two of) (5) 3/8" High-Pressure Hose (Primary Grease Line) (Two of) (6) Lubrication Distribution Valve (port 7) (7) Lubrication Distribution Valve ( port 7) (8) Pressure Switch

Illustration 3	g01149230
725, 730, 730 EJECTOR, 735, 740 and 740 EJECTOR Articulated Trucks (1) Lubrication Pump (9) Signal Lamp (10) Front Harness (11) Harness

The automatic lubrication system consists of an electrical and lubrication system. The electrical and lubrication systems function as one unit. The electrical system turns the automatic lubrication system on and off at periodic intervals. These intervals are referred to as lubrication cycles. A control unit in lubrication pump (1) communicates with pressure switch (8) and a level switch (grease) in the lubrication pump. The control unit also communicates with signal lamp (9). The electrical system also controls the parameters of the lubrication system. The operator can change the parameters with a diagnostic tool. The signal lamp is located inside the cab and can be used to change the frequency of grease flow to the grease points. Metering units in lubrication distribution valves (2), (6) and (7) distribute the lubricant to the grease points through the secondary lubrication lines (not shown). The metering units are available in different sizes. Each size delivers a different amount of grease per cycle.

Component Locations

725, 730 and 730 EJECTOR Articulated Trucks

Illustration 4	g01149568
Schematic of the components on the 725, 730 and 730 EJECTOR Articulated Trucks Signal Lamp (9), front harness (10) and harness (11) are not shown. (1) Lubrication Pump (2) Lubrication Distribution Valve (12 port) (3) 3/8" High-Pressure Hose (Two of) (4) 1/4" High-Pressure Hose (Two of) (5) 3/8" High-Pressure Hose (Two of) (6) Lubrication Distribution Valve ("7" port) (7) Lubrication Distribution Valve ("7" port) (8) Pressure Switch

Illustration 5	g01149569
(1) Lubrication pump next to the cab on the right side

Illustration 6	g01149570
(2) Lubrication distribution valve (12 port) on the engine side of the right fender

Illustration 7	g01074020
(6) Lubrication distribution valve ("7" port) on the front of the trailer above the hitch

Illustration 8	g01074021
725 and 730 Articulated Trucks Typical example for the 730 EJECTOR Articulated Truck (7) The lubrication distribution valve ("7" port) on the rear of the trailer near the body pivots. (8) Pressure switch

Illustration 9	g01073660
(9) Signal lamp in the cab behind the operator on the right side 725 (S/N: AFX1-Up; B1L1-504), 730 (S/N: AGF1-Up; B1M1-410) and 730 EJECTOR (S/N: B1W1-184)

Illustration 10	g01198797
(9) Signal lamp in the cab behind the operator on the right side 725 (S/N: B1L505-Up), 730 (S/N: B1M411-Up) and 730 EJECTOR (S/N: B1W185-Up)

735, 740 and 740 EJECTOR Articulated Trucks

Illustration 11	g01073659
Schematic of the components on the 735, 740 and 740 EJECTOR Articulated Trucks Signal Lamp (9), front harness (10) and harness (11) are not shown. (1) Lubrication Pump (2) Lubrication Distribution Valve (12 port) (3) 3/8" High-Pressure Hose (Two of) (4) 1/4" High-Pressure Hose (Two of) (5) 3/8" High-Pressure Hose (Two of) (6) Lubrication Distribution Valve ("7" port) (7) Lubrication Distribution Valve ("7" port) (8) Pressure Switch

Illustration 12	g01073662
(1) Lubrication pump next to the cab on the right side

Illustration 13	g01073664
(2) Lubrication distribution valve (12 port) on the engine side of the right fender

Illustration 14	g01073665
(6) Lubrication distribution valve ("7" port) on the front of the trailer above the hitch

Illustration 15	g01073666
735 and 740 Articulated Trucks Typical example for the 740 EJECTOR Articulated Truck (7) The lubrication distribution valve ("7" port) on theinside therear frame near the body pivots. (8) Pressure switch

Illustration 16	g01073660
(9) Signal lamp in the cab behind the operator on the right side 735 (S/N: AWR1-Up; B1N1-320), 740 (S/N: AXM1-Up; B1P1-621) and 740 EJECTOR (S/N: B1R1-193)

Illustration 17	g01198797
(9) Signal lamp in the cab behind the operator on the right side 735 (S/N: B1N321-Up), 740 (S/N: B1P622-Up) and 740 EJECTOR (S/N: B1R194-Up)

Grease Locations

Measured amounts of grease are supplied by the injectors. Grease supplied from three lubrication distribution valves that are on the tractor, front of the trailer and rear of the trailer. The measured amounts of grease are supplied to the grease points that are identified in Illustration 18 and Illustration 19.

Illustration 18 and Illustration 19 are typical examples for all the machines models. Depending on the configuration of a machine, greasing points for the hoist cylinders, body pivots, and tailgate might not be used.

Refer to Tables 2, to 6 for the sizes and part numbers of the metering units used to supply grease to each of the grease points.

Illustration 18	g03784296
Left side of the machine Reference table 1 and table 3 for grease point descriptions. Grease points (15), (19), (21) and (23) are not on the 730 Ejector, and 740 Ejector.

Illustration 19	g03784271
Right side of the machine Reference table 1 and table 3 for grease point descriptions. Grease points (16), (20), (22), and (24) are not on the 730 Ejector, 740 Ejector.

Small Machine Automatic Lubrication Dosers

Table 1

Small Machine Automatic Lubrication Dosers
Grease Point	Doser Number	Per Cycle cc (cubic inch)	Description
1	3	0.150 cc (0.00915 cubic inch)	Left steering cylinder bearing on the tractor
2	3	0.150 cc (0.00915 cubic inch)	Right steering cylinder bearing on the tractor
3	3	0.150 cc (0.00915 cubic inch)	Left steering cylinder bearing on the trailer
4	3	0.150 cc (0.00915 cubic inch)	Right steering cylinder bearing on the trailer
5	4	0.200 cc (0.01220 cubic inch)	Left upper suspension cylinder bearing
6	4	0.200 cc (0.01220 cubic inch)	Right upper suspension cylinder bearing
7	8	0.400 cc (0.02441 cubic inch)	Left lower suspension cylinder bearing
8	8	0.400 cc (0.02441 cubic inch)	Right lower suspension cylinder bearing
9	8	0.400 cc (0.02441 cubic inch)	Pivot bearing for front suspension frame
10	4	0.200 cc (0.01220 cubic inch)	Upper articulation hitch pin
11	8	0.400 cc (0.02441 cubic inch)	lower articulation hitch pin
12	8.5	0.700 cc (0.04271 cubic inch)	Oscillation hitch bearing
13	8.5	0.700 cc (0.04271 cubic inch)	Oscillation hitch bearing
14	8.5	0.700 cc (0.04271 cubic inch)	Oscillation hitch bearing
15	8	0.400 cc (0.02441 cubic inch)	Left lower hoist cylinder bearing (if equipped)
16	8	0.400 cc (0.02441 cubic inch)	Right lower hoist cylinder bearing (if equipped)
17	9	1.000 cc (0.06102 cubic inch)	pivot bearing for center suspension frame
18	9	1.000 cc (0.06102 cubic inch)	Pivot bearing for rear suspension frame
19	6	0.300 cc (0.01831 cubic inch)	Left upper hoist cylinder bearing (if equipped)
20	6	0.300 cc (0.01831 cubic inch)	Right upper hoist cylinder bearing (if equipped)
21	8	0.400 cc (0.02441 cubic inch)	Left body pivot bearing (if equipped)
22	8	0.400 cc (0.02441 cubic inch)	Right body pivot bearing (if equipped)
23	8.5	0.700 cc (0.04271 cubic inch)	Left tailgate pivot bearing (if equipped)
24	8.5	0.700 cc (0.04271 cubic inch)	Right tailgate pivot bearing (if equipped)

Table 2

Doser Number	Per Cycle cc (cubic inch)	Part Number
0	0.025 cc (0.00153 cubic inch)	177-3513 Grease Injector As
1	0.050 cc (0.00305 cubic inch)	235-9080 Grease Injector As
2	0.100 (0.00610 cubic inch)	178-2735 Grease Injector As
3	0.150 cc (0.00915 cubic inch)	177-3516 Grease Injector As
4	0.200 cc (0.01220 cubic inch)	177-3517 Grease Injector As
5	0.250 cc (0.01526 cubic inch)	N/A
6	0.300 cc (0.01831 cubic inch)	178-2740 Grease Injector As
7	0.350 cc (0.02136 cubic inch)	319-9184 Grease Injector As
8	0.400 cc (0.02441 cubic inch)	177-3518 Grease Injector As
8.5	0.700 cc (0.04271 cubic inch)	221-1585 Grease Injector As
9	1.000 cc (0.06102 cubic inch)	178-2746 Grease Injector As
10	2.000 cc (0.12204 cubic inch)	192-6212 Grease Injector As

Front Distribution Valve

Illustration 20	g03793563
220-7497 Lubrication Distribution Valve Gp (B) Blanking plug (Port is not used)

Center Distribution Valve

Illustration 21	g03793096
220-7502 Lubrication Distribution Valve Gp

Rear Distribution Valve

Illustration 22	g03793604
220-7501 Lubrication Distribution Valve Gp (23) and (24) Shown in the not equipped configuration with blanking plugs installed. (P) Pressure sensor

Large Machine Automatic Lubrication Dosers

Table 3

Small Machine Automatic Lubrication Dosers
Grease Point	Doser Number	Per Cycle cc (cubic inch)	Description
1	4	0.200 cc (0.01220 cubic inch)	Left steering cylinder bearing on the tractor
2	4	0.200 cc (0.01220 cubic inch)	Right steering cylinder bearing on the tractor
3	4	0.200 cc (0.01220 cubic inch)	Left steering cylinder bearing on the trailer
4	4	0.200 cc (0.01220 cubic inch)	Right steering cylinder bearing on the trailer
5	4	0.200 cc (0.01220 cubic inch)	Left upper suspension cylinder bearing
6	4	0.200 cc (0.01220 cubic inch)	Right upper suspension cylinder bearing
7	8	0.400 cc (0.02441 cubic inch)	Left lower suspension cylinder bearing
8	8	0.400 cc (0.02441 cubic inch)	Right lower suspension cylinder bearing
9	9(1)	1.000 cc (0.06102 cubic inch)	Pivot bearing for front suspension frame
	10(2)	2.000 cc (0.12204 cubic inch)
10	8	0.400 cc (0.02441 cubic inch)	Upper articulation hitch pin
11	9	1.000 cc (0.06102 cubic inch)	lower articulation hitch pin
12	9	1.000 cc (0.06102 cubic inch)	Oscillation hitch bearing
13	9	1.000 cc (0.06102 cubic inch)	Oscillation hitch bearing
14	9	1.000 cc (0.06102 cubic inch)	Oscillation hitch bearing
15	8.5	0.700 cc (0.04271 cubic inch)	Left lower hoist cylinder bearing (if equipped)
16	8.5	0.700 cc (0.04271 cubic inch)	Right lower hoist cylinder bearing (if equipped)
17	9	1.000 cc (0.06102 cubic inch)	pivot bearing for center suspension frame
18	9	1.000 cc (0.06102 cubic inch)	Pivot bearing for rear suspension frame
19	6	0.300 cc (0.01831 cubic inch)	Left upper hoist cylinder bearing (if equipped)
20	6	0.300 cc (0.01831 cubic inch)	Right upper hoist cylinder bearing (if equipped)
21	8.5	0.700 cc (0.04271 cubic inch)	Left body pivot bearing (if equipped)
22	8.5	0.700 cc (0.04271 cubic inch)	Right body pivot bearing (if equipped)
23	8.5	0.700 cc (0.04271 cubic inch)	Left tailgate pivot bearing (if equipped)
24	8.5	0.700 cc (0.04271 cubic inch)	Right tailgate pivot bearing (if equipped)

(1)	Grease Injector As (Doser) (10) replaces Grease Injector As (Doser) (9).
(2)	Refer to Table 4 and Table 5.

Table 4

Grease Injector As (Doser) (10) is adaptable to the following machines
Model	Serial Number
735B	L4D1-403
	T4P1-314
740B	L4E1-985
	T4R1-618
740B Ejector	L4F1-407
	T4S1-311

Table 5

Grease Injector As (Doser) (10) is effective with the following machines
Model	Serial Number
735B	L4D404-UP
	T4P315-UP
740B	L4E986-UP
	T4R619-UP
740B Ejector	L4F408-UP
	T4S312-UP

Table 6

Doser Number	Per Cycle cc (cubic inch)	Part Number
0	0.025 cc (0.00153 cubic inch)	177-3513 Grease Injector As
1	0.050 cc (0.00305 cubic inch)	235-9080 Grease Injector As
2	0.100 (0.00610 cubic inch)	178-2735 Grease Injector As
3	0.150 cc (0.00915 cubic inch)	177-3516 Grease Injector As
4	0.200 cc (0.01220 cubic inch)	177-3517 Grease Injector As
5	0.250 cc (0.01526 cubic inch)	N/A
6	0.300 cc (0.01831 cubic inch)	178-2740 Grease Injector As
7	0.350 cc (0.02136 cubic inch)	319-9184 Grease Injector As
8	0.400 cc (0.02441 cubic inch)	177-3518 Grease Injector As
8.5	0.700 cc (0.04271 cubic inch)	221-1585 Grease Injector As
9	1.000 cc (0.06102 cubic inch)	178-2746 Grease Injector As
10	2.000 cc (0.12204 cubic inch)	192-6212 Grease Injector As

Front Distribution Valve

Illustration 23	g03793803
254-6753 Lubrication Distribution Valve Gp (B) Blanking plug (Port is not used)

Center Distribution Valve

Illustration 24	g03793811
254-6756 Lubrication Distribution Valve Gp

Rear Distribution Valve

Illustration 25	g03793806
254-6761 Lubrication Distribution Valve Gp (23) and (24) Shown in the not equipped configuration with blanking plugs installed. (P) Pressure sensor