Komatsu H70051 Series Operation & Maintenance Manual page 427

ATTACHMENTS AND OPTIONS
6.
Loosen the nut (1). Adjust the position of the proximity
switch (3) so that the rear end (A) of the bar (2) and the
center point of sensory surface (B) of proximity switch (3)
are within the range "a".
a: 37 to 43 mm
7.
Adjust the range "c" with nut (1) so that the tip (C) of pro-
tector (5) protrudes 0.5 to 1.0 mm {0.02 to 0.039 in} from
the sensory surface (B) of all proximity switches (3).
8.
Loosen the bolt (4), and adjust the clearance "d" between
the bar (2) and the sensory surface (B) of all proximity
switches (3) so that it is within 3 to 5 mm, and fix it.
Tightening torque: 14.7 to 19.6 Nm {1.5 to 2.0 kgm}
9.
After adjustment, run the engine to raise the boom. Check that the lever automatically returns to "HOLD"
position at the point where the fork becomes horizontal, when tilting back the fork after fork DUMP opera-
tion.
REMARK
For more accurate check, keep the HST oil temperature equal to those when the machine is actually oper-
ated.
LOADING AND UNLOADING OPERATION
The following is the explanation how to operate the fork but it does not explain all of the occasions. It may vary
according to the work situation.
Perform the operation of the fork by the most safe and efficient way in each situation.
HANDLE FORK
6-27