Komatsu D475A-5E0 Operation & Maintenance Manual page 315

SERVICE PROCEDURE SERVICE PROCEDURE
1. Close the fuel valve (1).
2. Set a container under the fuel prefilter cartridge to catch the oil.
3. Remove transparent cup (3) from the filter (2) and inspect it. If
it is broken or damaged, replace it with a new part.
4. Clean transparent cup (3) and remove seal (4). Coat the new
seal with clean fuel or oil.
5. Install transparent cup (3) to the new filter cartridge.
Tightening torque for cup: 10 Nm {1.0 kgm, 7.2 lbft}
6. Check that cap (B) is installed to the new filter cartridge, then
fill with clean fuel.
NOTICE
When filling with fuel, always use fresh fuel and be careful not to let any dirt
or dust get in. Fill with fuel through 8 small holes (A) (dirty side). Cap (B) is
to prevent oil containing dirt from getting into the clean side. Always add
the oil with cap (B) installed.
7. Remove cap (B) after topping off the filter cartridge with fuel.
8. Clean the filter holder, coat the seal surface of the new
cartridge thinly with oil, then install the cartridge.
9. When installing, tighten until the packing surface contacts the
seal surface of the filter head, then tighten it 3/4 of a turn.
If the filter cartridge is tightened too far, the packing will be
damaged and this will lead to leakage of fuel. If the filter
cartridge is too loose, fuel will also leak from the packing, so
always tighten the correct amount.
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MAINTENANCE MAINTENANCE