Testing And Adjusting Of Boom Kick-Out Switch - Komatsu WA250-6 Shop Manual

120 Testing and adjusting, Part 2

Testing and adjusting of boom kick-out switch

Testing and adjusting of boom
kick-out switch
Testing
1. With the engine stopped, check that clearance
(a) between detection surface of switch (1) and
plate (2) is the standard value.
a Standard clearance (a): 3 – 5 mm
2. Start the engine, run at high idle, and check the
actuation point.
(Check three times and take the average.)
Adjusting
1. Raise the lift arm to the desired height, then
mark the lift arm to show the position where
the center of the switch is aligned with the bot-
tom of the plate.
k
Always be sure to apply the work equipment
lock lever.
2. Lower the lift arm and stop the engine.
3. Align the marks and adjust the position of the
plate so that the center of switch (1) is at the
bottom of plate (2), then secure in position with
bolt (3).
WA250, 250PZ-6
4. Adjust the switch so that clearance (a) between
the sensing surface of the switch and plate (2)
1
is the standard value, then secure in position.
3
Switch mounting nut:
The installing position may be checked by
q
checking the operation of the pilot lamp of
the proximity switch with the starting
switch at the ON position.
a For ON/OFF of the pilot lamp, see "Check-
ing proximity switch working pilot lamp".
a After adjusting, start the engine, operate
the work equipment control lever and
check that the boom kickout is actuated at
the desired position.
SEN03837-01
14.7 – 19.6 Nm {1.5 – 2.0 kgm}
30-120
37