2014/12/16 Caterpillar

Work Tool:

H110E S (S/N: HHB1-UP)

H115E S (S/N: HHD1-UP)

Safety and Machine Preparation for Rework

Show/hide table

Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility.

Show/hide table

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 work tools have been lowered to the ground, and the 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.

Show/hide table

Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

Illustration 1	g00104545

Prevent the machine from movement. Park the machine on a level surface.

Attach a "Do Not Operate" warning tag to the start switch before you service or repair the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.

Preparing the machine for rework may follow some of the same preparations for troubleshooting. The preparation for troubleshooting has been included below.

Preparation for Troubleshooting

Show/hide table

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system.

1. Park the host machine on a smooth, level surface. Move away from other operating machines and away from personnel. Lower the work tool to the ground. Stop the engine.

2. Permit only one operator on the host machine. Keep other personnel away from the host machine or in the sight of the operator.

3. Engage the parking brake. Place chocks in front of the tracks or wheels and behind the tracks or wheels.

4. When the work tool is raised for testing or for adjusting, make sure that the work tool is supported correctly. The lift circuit has high oil pressure when the lift arms raise the work tool.

   Note: Do not stop the host machine with the work tool off the ground unless required for a test. Lower the work tool to the ground and stop the engine.

5. Cycle the hydraulic control levers through all positions in order to release the pressure in the hydraulic system.

6. To relieve all of the pressure in the hydraulic oil tank, slowly loosen the filler cap.

   Note: All hydraulic pressure must be released before any hydraulic components are worked on.

7. Install the filler cap.

8. Pressure can be retained with the hammer. Relieve the pressure within the hammer before you perform any repairs or before you test the hammer. Use either of the following procedures in order to relieve the pressure within the hammer:
   • After the hammer has been operating, allow the hammer to rest for 10 minutes before you perform any repairs or tests.

   • Slowly open 9S-8004 Plug on Check Valve .

   • Slowly open 9S-8004 Plug on Valve Body .

Required Parts

This special instruction describes the procedure to replace the spring and stem in the pressure control valve on the above listed machines. The hammer does not have to be removed from the machine to perform this rework.

Rework Instructions

Note: The Hammer DOES NOT need to be removed from the machine to perform this rework.

Show/hide table



Illustration 2	g03740444

1. Remove side shield (A) to gain access to pressure control valve (B) on the return side of the hammer. Refer to Illustration 2 and Illustration 3.

Show/hide table



Illustration 3	g03740445

2. Remove bolts (D) and washers (C) from pressure control valve (B) .

Show/hide table



Illustration 4	g03740446

3. Remove pressure control valve (B) .

Show/hide table



Illustration 5	g03740447
(1) 095-1700 O-Ring Seal (2) 095-1701 O-Ring Seal (3) 095-1703 O-Ring Seal (4) 095-1704 O-Ring Seal (5) 356-3310 Backup Ring (6) 356-3311 Backup Ring (7) 356-3312 Backup Ring (8) New 464-2961 Stem-Control Valve (9) New 467-2506 Spring-Control Valve (F) Current stem to be removed and replaced with new part number (G) Current spring to be removed and replaced with new part number

4. Separate parts (B) and (E) of the pressure control valve. Remove spring (G) and stem (F) .

   Replace stem (F) with 464-2961 Stem-Control Valve (8) .

   Replace spring (G) with 467-2506 Spring-Control Valve (9) .

Show/hide table



Illustration 6	g03740449
(1) 095-1700 O-Ring Seal (2) 095-1701 O-Ring Seal (3) 095-1703 O-Ring Seal (4) 095-1704 O-Ring Seal (5) 356-3310 Backup Ring (6) 356-3311 Backup Ring (7) 356-3312 Backup Ring (8) 464-2961 Stem-Control Valve (9) 467-2506 Spring-Control Valve

5. Clean and reassemble parts in reverse of removal. Refer to Illustration 5 and Illustration 6 for seal part numbers.