If a problem is encountered with the planetary transmission, recalibrate the transmission prior to proceeding with investigations.
A visual inspection of the system must be carried out in order to eliminate many of the less complex problems.
Upon completion of a visual inspection, if the cause of the problem has not been diagnosed, carry out operational checks of the system.
If both visual inspection and operational checks have been carried out and there is still no clear indication of the cause of the problem then it will be necessary to refer to the troubleshooting charts and the test procedures that are contained in this manual.
Troubleshooting a system such as the power train on the 725 or 730 is a complex operation. Refer to the various troubleshooting sections in this manual for specific routines for troubleshooting.
This list of possible problems and possible corrections will only provide an indication of the location of a problem and the repairs that are required. It is important to remember that a problem is not necessarily caused by a single part, but by the relation of one part to a number of other parts. This information cannot provide all the possible problems and corrections. It is necessary for service personnel to define the problem. Any repairs may then be carried out.
Test Points and Locations
725 (S/N: B1L1-879), 730 (S/N: B1M1-802) and 730 EJECTOR (S/N: B1W1-214)
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| Illustration 1 | g01132472 |
The panel for the test points is located at the rear left side of the front chassis. | |
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| Illustration 2 | g01049477 |
(A) Test point for the hoist system (ejector)
(B) Test point for steering system
(C) Test point for the pilot pressure for the hoist system (ejector)
(D) Test point for the front brake pressure
(E) Test point for the piston pump (Steering and hoist (ejector))
(F) Test point for the fan drive system
(G) Test point for the brake charging
(H) Test point for parking brake system
(J) Test point for output transfer gear and differentials
(K) Test point for the piston pump (Brake, hoist (ejector) and fan)
725 (S/N: B1L880-1414), 730 (S/N: B1M803-1308) and 730 EJECTOR (S/N: B1W215-262)
On 725 (S/N: B1L880-1414), 730 (S/N: B1M803-1308), and 730 EJECTOR (S/N: B1W215-262), all the test lines from the test panel are disconnected from the various test points on the machine.
When you test any part of the hydraulic systems on the listed machines, first check the test procedure for the test lines that are required and ensure that the required test lines are connected before you conduct the test procedure. In order to help identify the correct test line for a specific test point, both ends of the test line is identified with a colored ring.
When you have completed testing the hydraulic system on the machine, ensure that all of the test lines are disconnected before returning the machine to normal operation.
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| Illustration 3 | g01281747 |
The panel for the test points is located at the rear left side of the front chassis. | |
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| Illustration 4 | g01242889 |
Refer to Illustration 3, Illustration 4 and Table 2 for the position of the remote test points on the test panel and the purpose of the test points on the 725, 730, and 730 EJECTOR Articulated Trucks.
| Test Points | ||
|---|---|---|
| Position on Panel | 725, 730 and 730 EJECTOR Articulated Trucks | Color Code |
| A | Hoist System (Ejector) | Redish Brown |
| B | Steering System | Yellow |
| C | Hoist System (Ejector) Pilot Pressure |
Orange |
| D | Front Brake Pressure | Red |
| E | Piston Pump Steering and Hoist (Ejector) |
Light Green |
| F | Fan Drive System | Dark Green |
| G | Brake Charging | Light Blue |
| H | Parking Brake System | Dark Blue |
| J | Output Transfer Gear Differentials |
Gray |
| K | Piston Pump Brake, Hoist (Ejector) and Fan |
White |
Refer to Illustration 5 and Table 2 for the purpose of the test points and positions of the test points on the Machine.
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| Illustration 5 | g01243224 |
(A) (Color Code: Redish Brown) Test point for the Hoist System (Ejector) (B) (Color Code: Yellow) Test point for the Steering System (C) (Color Code: Orange) Test point for the Pilot Pressure for the Hoist System (Ejector) (D) (Color Code: Red) Test point for the Front Brake Pressure (E) (Color Code: Light Green) Test point for the Piston Pump ( Steering and Hoist (Ejector)) (F) (Color Code: Dark Green) Test point for the Fan Drive System (G) (Color Code: Light Blue) Test point for Brake Charging (H) (Color Code: Dark Blue) Test point for the Parking Brake System (J) (Color Code: Gray) Test point for the Output Transfer Gear and Differentials (K) (Color Code: White) Test point for the Piston Pump ( Brake, Hoist (Ejector) and Fan) | |
Locations of Test Points
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| Illustration 6 | g01244711 |
The cab raised for photographic clarity. The test point is on the left side of the main control valve. (A) (Color Code: Redish Brown) Test point for the Hoist System (Ejector) | |
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| Illustration 7 | g01244712 |
The cab raised for photographic clarity. The test point is on the left side of the main control valve. (B) (Color Code: Yellow) Test point for the Steering System | |
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| Illustration 8 | g01244713 |
The cab raised for photographic clarity. The test point is on the right side of the main control valve. (C) (Color Code: Orange) Test point for the Pilot Pressure for the Hoist System (Ejector) | |
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| Illustration 9 | g01244726 |
View from the front of the machine and looking at the area of the right suspension cylinder (D) (Color Code: Red) Test point for the Front Brake Pressure | |
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| Illustration 10 | g01244727 |
The cab raised for photographic clarity. The test point is on the right side of the main control valve. (E) (Color Code: Light Green) Test point for the Piston Pump ( Steering and Hoist (Ejector)) | |
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| Illustration 11 | g01245106 |
The cab raised for photographic clarity. The test point is on the right side of the main control valve. (F) (Color Code: Dark Green) Test point for the Fan Drive System (K) (Color Code: White) Test point for the Piston Pump ( Brake, Hoist (Ejector) and Fan) | |
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| Illustration 12 | g01245107 |
The cab raised for photographic clarity. The test point is on the right side of the main control valve. (G) (Color Code: Light Blue) Test point for Brake Charging | |
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| Illustration 13 | g01245112 |
The cab raised for photographic clarity. The test point is on the left side of the main control valve. (H) (Color Code: Dark Blue) Test point for the Parking Brake System | |
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| Illustration 14 | g01245114 |
View from the underside of the machine in the area at the rear of the output transfer gear (J) (Color Code: Gray) Test point for the Output Transfer Gear and Differentials | |
725 (S/N: B1L1415-UP), 730 (S/N: B1M1309-UP) and 730 EJECTOR (S/N: B1W263-UP)
On 725 (S/N: B1L1415-UP), 730 (S/N: B1M1309-UP), and 730 EJECTOR (S/N: B1W263-UP), test lines are no longer installed on the machine.
Refer to Illustrations 15 through 22 and Table 3 for the position of the test points on the machines and the purpose of the test points on the 725, 730, and 730 EJECTOR Articulated Trucks.
Locations of Test Points
| Test Points | |
|---|---|
| Test Point | 725 730 730 EJECTOR |
| A | Hoist (Ejector) System |
| B | Steering System |
| C | Hoist (Ejector) System Pilot Pressure |
| D | Front Brake Pressure |
| E | Piston Pump Steering and Hoist (Ejector) |
| F | Fan Drive System |
| G | Brake Charging |
| H | Parking Brake System |
| J | Output Transfer Gear Differentials |
| K | Piston Pump Brake, Hoist (Ejector) and Fan |
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| Illustration 15 | g01359764 |
(A) This test port is for the hoist system or the ejector system. This test port is located on the back, left side of the main control valve. (H) This test port is for the parking brake system. This test port is located on the middle, left side of the main control valve. | |
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| Illustration 16 | g01359766 |
(B) This test port is for the steering system. This test port is located on the front, left side of the main control valve. | |
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| Illustration 17 | g01359768 |
(C) This test port is for the pilot pressure for the hoist system or the ejector system. This test port is located on the top, right side of the main control valve in the middle. | |
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| Illustration 18 | g01359770 |
(D) This test port is for the front brake pressure. This test port is located on the right side of the engine just in front of the cab. | |
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| Illustration 19 | g01359772 |
(E) This test port is for the piston pump for the steering system and the hoist system or the ejector system. This test port is located on the top right side of the main control valve at the back. | |
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| Illustration 20 | g01359774 |
(F) This test port is for the fan drive system. This test port is located on the bottom, right side of the main control valve at the back. (K) This test port is for the piston pump for the brake system, the hoist system or the ejector system, and the fan system. This test port is located on the top right side of the main control valve at the front. | |
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| Illustration 21 | g01359769 |
(G) This test port is for brake charging. This test port is located on the bottom right side of the main control valve in the middle. | |
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| Illustration 22 | g01359775 |
(J) This test port is for the output transfer gear and the differentials. This test port is located at the rear of the hoist control valve or the ejector control valve. | |