Doosan DX300LC Excavator Upper Roller Reassembly and Disassembly Guide

This instruction show you guide on how to reassembly and disassembly Upper Roller for Doosan DX300LC excavator.

Procedures:
Upper Roller Disassembly Doosan DMS-5 Free Download
1. Remove the plug (9, Figure 36) from the cover and drain oil.
2. Remove the bolts (13, Figure 37) and cover (10). Detach bolts (12) and washer (11).
3. Separate the roller (1, Figure 38) from the axle (2).
4. Separate the floating seal (6, Figure 39) from the roller.
5. Separate the O-ring (8) and thrust ring (3) from the axle.
6. Separate the bushing (4 and 5, Figure 40) from the roller with a press and special tool (ST-1919).

Upper Roller Reassembly
1. Degrease, clean and dry all parts before reassembly. Insert bushing (4 and 5, Figure 41) into the roller (1). Doosan EPC Download
2. Insert floating seal (6, Figure 42) into the roller (1) and bushing.
NOTE: Apply clean engine oil to the joint side of the
floating seal. Apply grease to the floating seal O-ring.
3. Install the axle (2), O-ring (8) and thrust ring (3).
4. Install washer (11, Figure 43) and bolt (12).
5. Insert the O-ring (7, Figure 43) to the cover (10). Attach cover (10) and bolt (13) to the roller.
6. Fill with engine oil with 200cc.
7. Tighten plug