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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. |
| REQUIRED TOOLS | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 4C-9910 | Portable Hydraulic Tester 48200 kPa (7000 psi) 13 L/min to 473 L/min (4 US gpm to 125 US gpm) |
1 |
| 9U-5228 | Union (1) |
2 | |
| ( 1 ) | Additional fittings may be required. Check your host machine for the proper mating parts. |
 | |
| Illustration 1 | g00692655 |
(1) Inlet line (2) Portable Hydraulic Tester (3) Back Pressure Gauge (4) Return line | |
- Lower the boom to the ground and stop the engine of the host machine. Relieve the pressure from the hydraulic system. Refer to Testing and Adjusting for the host machine.
- Connect 4C-9910 Portable Hydraulic Tester (2) to inlet line (1) and to return line (4) .
Note: Before you use 4C-9910 Portable Hydraulic Tester , read the user manual for proper utilization. Be sure to understand the operation of the tester and the maintenance of the tester before usage.
- Start the host machine. Run the host machine at high idle until the hydraulic oil reaches the normal operating temperature of 50° ± 10°C (122° ± 18°F). All testing must be done at maximum engine rpm, maximum power level, and maximum work mode.
- Gradually close the orifice valve on the hydraulic tester until operating pressure is reached. Refer to Table 2 for the operating pressure specification.
- Record the reading from the hydraulic flow tester. Refer to Table 2 for the proper specifications. If necessary, adjust the flow. Refer to Service Manual for the host machine for the proper procedure. The flow must be within the specifications at the normal operating pressure of the work tool.
- Record the back pressure reading from pressure gauge (3) on the Service Record for the Hammer. Refer to Operation and Maintenance Manual, "Work Tool Installation" for the service record. If the pressure exceeds the specification, check the return side of the system for a restriction.
- After adjustments have been made, stop the engine on the host machine and relieve the hydraulic pressure. Remove the tooling from the hose assemblies.
| Specifications | |||
|---|---|---|---|
| Sales Model | Oil Flow | Operating Pressure (1) | Maximum Recommended Back Pressure (2) |
| H110E S | 60 L/min to 120 L/min (16 gpm to 32 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2320 psi) |
1000 kPa (145 psi) |
| H115E S | 70 L/min to 130 L/min (18 gpm to 34 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2175 psi) |
1000 kPa (145 psi) |
| H120E S | 100 L/min to 170 L/min (26 gpm to 45 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2175 psi) |
1000 kPa (145 psi) |
| H130E S | 120 L/min to 220 L/min (32 gpm to 58 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2175 psi) |
1000 kPa (145 psi) |
| H140E S | 160 L/min to 230 L/min (42 gpm to 61 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2320 psi) |
1000 kPa (145 psi) |
| H160E S | 220 L/min to 300 L/min (58 gpm to 79 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2320 psi) |
1000 kPa (145 psi) |
| H180E S | 220 L/min to 300 L/min (58 gpm to 79 US gpm) |
13500 kPa to 16000 kPa (1960 psi to 2320 psi) |
1000 kPa (145 psi) |
| ( 1 ) | The operating pressure of the hammer will vary with the conditions: application of the hammer , the back pressure in the hammer , oil viscosity , flow rate and other factors. The operating pressure of the hammer is shown as a range for the preceding reasons. |
| ( 2 ) | Back pressure that exceeds the given value will increase the operating pressure of the hammer. Back pressure that exceeds the given value will reduce the overall efficiency of the hammer. The cooling requirements for the system of the hammer will be greater. |