- Mini Hydraulic Excavator:
- 303 (S/N: DMA2167-UP)
- 304 (S/N: NAD1628-UP)
- 305 (S/N: DGT446-UP)
Description of Change: An accumulator can now be adapted to certain Mini Hydraulic Excavators without a factory installed accumulator. This procedure provides an alternative method for releasing the system pressure. Use this method in place of Service Magazine, SEPD0759 for releasing the system pressure.
Adaptable To: Refer to Table 2 for machine effectivity.
| Machine Effectivity | |
|---|---|
| Model | Adaptable |
| 303CR | S/N:DMA2167-UP |
| 304CR | S/N:NAD1628-UP |
| 305CR | S/N:DGT446-UP |
| Required Parts 303CR |
|||
|---|---|---|---|
| Item | Qty | Part Number | Description |
| 1 | 1 | 087-4456 | Hydraulic Accumulator Gp |
| 2 | 1 | 4I-8267 | Accumulator Cap |
| 3 | 2 | 3K-0360 | O-Ring Seal |
| 4 | 1 | 226-8938 | Block |
| 5 | 1 | 213-5316 | Hose As |
| 6 | 1 | 3J-1907 | O-Ring Seal |
| 7 | 1 | 6V-8723 | Elbow |
| 8 | 1 | 6V-8724 | Elbow |
| 9 | 2 | 199-1901 | O-Ring Seal |
| 10 | 2 | 8T-4195 | Bolt |
| 11 | 2 | 8T-4121 | Hard Washer |
| 12 | 1 | 3S-2093 | Cable Strap |
| Required Parts 304CR and 305CR |
|||
|---|---|---|---|
| Item | Qty | Part Number | Description |
| 1 | 1 | 087-4456 | Hydraulic Accumulator Gp |
| 2 | 1 | 4I-8267 | Accumulator Cap |
| 3 | 1 | 3K-0360 | O-Ring Seal |
| 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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
 |
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. |
 |
Installation Procedure for the 303CR Mini Hydraulic Excavator
- Remove 148-8411 Plug from the manifold.
 | |
| Illustration 1 | g01238757 |
 | |
| Illustration 2 | g01236246 |
(1) 3S-2093 Cable Strap (2) 3K-0360 O-Ring Seal (3) 6V-8723 Elbow (4) 199-1901 O-Ring Seal (5) 4I-8267 Accumulator Cap (6) 087-4456 Hydraulic Accumulator Gp (7) 3J-1907 O-Ring Seal (8) 226-8938 Block (9) 6V-8724 Elbow (10) 213-5316 Hose As (11) 8T-4195 Bolt (12) 8T-4121 Hard Washer (13) 153-7770 Manifold | |
- Install 087-4456 Hydraulic Accumulator Gp (6) into 226-8938 Block (8) with 3K-0360 O-Ring Seal (2) .
- Install Block to the frame of the machine with two 8T-4195 Bolts (11) and two 8T-4121 Hard Washers (12) .
- Connect the other end of Hose As (10) to Elbow (9) with O-Ring Seal (4) .
- Install 4I-8267 Accumulator Cap (5) on Hydraulic Accumulator Gp (6) .
Installation Procedure for the 304CR and 305CR Mini Hydraulic Excavator
- Remove 148-8411 Plug from the manifold.
 | |
| Illustration 3 | g01237177 |
(1) 4I-8267 Accumulator Cap (2) 087-4456 Hydraulic Accumulator Gp (3) 3K-0360 O-Ring Seal (4) 153-7770 Manifold | |
- Install 4I-8267 Accumulator Cap (1) on Hydraulic Accumulator Gp (2) .