Komatsu PC88MR-10 Shop Manual page 513

5. Remove spring (4) and valve (5) , and then
remove element (6).
6. Clean the removed parts using cleaning oil.
7. Install outer element (6).
8. Check O-ring to be installed between hydraulic
tank and cover (3), and replace it if it has any
scratches.
9. Set valve (5) and spring (4) to element (6).
10.Set cover (3) and install it with the mounting
bolts while pressing it by hand.
11.Tighten the mounting bolts.
12.Install the cap of oil filler port (F).
13.Install plate (2) on the top surface of oil filler port
(F), and fix it with bolt (1).
14.To bleed air, run the engine at low idle for 10
minutes.
15.Stop the engine.
b6. Check of swing machinery case oil level
Immediately after the engine is stopped, its
parts and oil are still very hot, and may cause
burn injury. Accordingly, wait until all parts
have cooled down before starting the work.
1. Swing the upper structure so that drain plug (P)
is in the middle between the right and left tracks.
2. Place a container under drain plug (P) on the
bottom side of the machine to receive the oil.
3. Remove dipstick (G) and wipe off oil on it with a
cloth.
4. Fully insert dipstick (G) into the dipstick pipe
again, then remove it.
PC88MR-10
Related information on troubleshooting
5. Pull out dipstick (G) and check the oil level. If the
oil level is between H mark and L mark on the
dipstick, it is appropriate.
6. If the oil level does not reach L mark on dipstick
(G), add oil through oil filler (F).
7. If the oil level is above H mark of dipstick (G),
loosen drain valve (P) to drain the excessive oil.
8. After checking oil level or adding oil, insert
dipstick (G) into the insertion hole.
b7. Check of final drive case oil level
Since the oil may spurt out due to internal
pressure, rotate the plug gradually from its
side to release the internal pressure and then
remove it carefully.
Immediately after the engine is stopped, its
parts and oil are still very hot, and may cause
burn injury. Accordingly, wait until all parts
have cooled down before starting the work.
Prepare a container to receive drained oil.
Prepare a hexagonal wrench.
1. Be sure that plug (P) is at the right below.
2. Place a container under drain plug (P) to receive
the oil.
3. Remove plugs (P), (G), and (F) by using the
hexagonal wrench, and drain oil.
4. Tighten plug (P).
5. Fill it with the refill capacity of engine oil through
the hole of plug (F).
40 Troubleshooting
40-25