Periodic Replacement Of Safety Critical Parts; Safety Critical Parts - Komatsu D155A-6 Operation & Maintenance Manual

PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS

PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
For using the machine safely for an extended period of time, you are required to periodically replace the safety
(critical and fire prevention) related parts listed in the table of important parts on the following page.
Material quality of these parts can change as time passes and they are likely to wear out or deteriorate. However,
it is difficult to determine the extent of wear or deterioration at the time of periodic maintenance. Hence, it is required
to replace them with new ones regardless of their condition after a certain period of usage. This is important to
ensure that these parts maintain their full performance at all times.
Furthermore, should anything abnormal be found on any of these parts, replace it with a new one even if the periodic
replacement time for the part has not yet arrived.
If any of the hose clamps show deterioration like deformation or cracking, replace the clamps at the same time as
the hoses.
Also perform the following checks with hydraulic hoses which need to be replaced periodically. Tighten all loose
clamps and replace defective hoses, as required.
When replacing hoses, always replace O-rings, gaskets, and other such parts at the same time.
Have your Komatsu distributor replace the critical parts.

SAFETY CRITICAL PARTS

Replace wear parts such as the filter element or air cleaner element at the time of periodic maintenance or before
they reach the wear limit. The wear parts should be replaced correctly in order to ensure more economic use of the
machine. When replacing parts, always use Komatsu genuine parts.
As a result of our continuous efforts to improve product quality, the part number may change, so inform your
Komatsu distributor of the machine serial number and check for the latest part number when ordering parts.
NO. Safety critical parts for periodic replacement
1 Fuel hose (fuel tank - fuel strainer)
2 Fuel hose (fuel tank - water drain valve)
3 Fuel hose (fuel strainer - additional water separator)
4 Fuel hose (additional water separator - engine entrance)
5 Fuel return hose (engine spout- fuel tank)
6 Fuel return hose (engine spill spout - fuel tank)
7 Hose between torque converter oil cooler and power train assembly
8 Hose between power train pump and power train filter
9 Hose between power train filter and power train assembly
10 Hose between transmission case and steering case
11 Power train pressure detection hose assembly
12 Hose between end face of left pivot shaft and straight frame relay tube
13 Hose between straight frame relay tube and blade tilt cylinder
14 Hose between hydraulic pump and drain relay block
15 Hose between drain relay block (power train) and hydraulic tank
16 Hose between oil cooler and drain relay block
17 Hose between fan pump and self pressure reducing valve
18 Hose between self pressure reducing valve and fan motor
19 Hose between PPC divider block and main control valve
20 Hose between PPC divider block and fan pump
4 - 16
MAINTENANCE
Q'ty Replacement interval
1
1
1
1
1
1
1
1
1
Every 2 years or 4000
1
hours, whichever
1
comes sooner
2
2
1
1
2
1
3
2
1