NOTICE
• The rod has 2 lines of (a) and (b) which show the ad-
justment position of pitch angle adjustment. Do not
extend it more than 60 ° line (a) on the blade edge an-
gle.
The blade edge angle can be adjusted to meet the soil
conditions.
• When operation is performed at stroke end while the
pitch angle exceeds the forward pitch limitation (rod
length 510 mm {20.1 in}  or more), the piston nut may
become loose due to the external load applied to it.
When the bracket tip (1) does not contact to the rod,
the pitch angle exceeds the forward pitch limitation.
When the operation requires the pitch angle to extend
beyond the forward pitch limitation, do not perform the
full-angling operation of the blade.
1.
Lower the blade to the ground.
2.
Loosen the bolt (2).
3.
Turn the rod (3) to adjust the pitch angle forward or rear-
ward.
No. Adjustment
Length
between
rods (L)
Wide/narrow
blade
High capacity
blade
Blade edge an-
gle (A)
Blade edge
angle (A)
(a)
Forward
(Maximum)
530 mm 60 ° 58 °
(b) Standard 510 mm 57 ° 55 °
(c)
Rearward
(Minimum)
485 mm 53 ° 51 °
REMARK
When
the maximum cutting angle (blade tilted fully forward) is changed to the minimum cutting angle (blade
tilted fully rearward), there is resistance from the pressure stored in the angle cylinder, so the operating ef-
fort may gradually become heavier.
In this case, turn the starting switch to ON position (you do not need to start the engine), and then cancel
the work equipment lock lever, set the blade control lever in the angling direction, and release the pressure
in the angle cylinder.
4.
Install the bolts (2).
Tightening torque: 490 to 608 Nm {50 to 62 kgm}
TIPS FOR LONGER UNDERCARRIAGE LIFE
Undercarriage life greatly varies depending on operation method, inspection and maintenance.
For most efficient operation, keep the following points in mind.
OPERATION METHOD
• Use a track shoe suitable for soil condition.
For selection of the shoe, consult your Komatsu distributor.
• Do not let the shoe slip during operation.
If the shoe starts slipping, decrease the load to prevent slipping.
• Avoid rapid start, acceleration, stop, or unnecessary high-speed operation or sharp turn.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-178
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