SkyTrak 6036 Service Manual - Manual (Page 44)

Section 4 Operator's Cab
4-8 Model 6036/6036T S/N 9B0500 thru 14833
4.3.4 Joystick Resistance Check
(without TLC)
6. Connect the ohmmeter between the “T” and
“C” terminals on the extend/retract connector
strip, Fig. 4.9. Move the joystick handle fully
into the boom extend position until a resis-
tance reading is measured on the ohmmeter.
Record this reading. Move the joystick fully
into the boom retract position. Record this
reading.
7. If any of the resistance readings are below
1950 ohms minimum or the relationship
between the two readings that were taken in
step 5 (raise/lower) or in step 6 (extend/
retract) is more than 100 ohms apart; the
joystick potentiometer(s) zero point must be
reset. Follow procedures below to make this
adjustment.
If all resistance readings are at or above the 1950
ohms minimum and the raise/lower and extend/
retract readings are within 100 ohms of each
other, no adjustment is necessary. Follow proce-
dures 8 thru 10 in the next set of steps to remount
the joystick.
4.3.5 Joystick Resistance Adjustment
(without TLC)
1. Loosen the two setscrews on the small pinion
gear and remove the pinion gear from the
potentiometer shaft, Fig. 4.9, (the setscrews
will require a 1,5 mm allen wrench).
2. Connect the ohmmeter to terminals “T” and
“C” of the respective function being adjusted.
3. Turn the potentiometer shaft, by hand, until
the resistance reading is as close to (0) zero
as possible.
4. Without turning the potentiometer shaft,
replace the pinion gear and tighten only one
setscrew in place.
5. Move the joystick handle in the respective
direction of the functions being tested. Check
the resistance readings in both directions.
Both readings must be above 1950 ohms and
must be within 100 ohms of each other.
Repeat these procedures until the proper
readings are reached.
6. Repeat procedures 1 thru 5 above if the zero
point on the other potentiometer requires
adjustment.
7. After the potentiometer(s) have been adjusted
properly, tighten both pinion gear setscrews.
Fig. 4.9 Joystick Resistance and Adjustment
1. Shut off engine.
2. Remove the four screws that secure the
joystick mounting cover to the right side
console.
3. Carefully lift the cover, with joystick still
attached, up and over the Fork/Frame tilt
joystick and place in a stable position which
exposes the bottom of the joystick.
4. On both connector strips attached to the
bottom of the joystick circuit board, disconnect
the grey wires from terminal connections “T”
and the yellow wires from terminal connec-
tions “C”.
5. Connect an ohmmeter between the “T” and
“C” terminals on the Raise/Lower connector
strip, Fig. 4.9. Move the joystick handle fully
into the boom raise position until a resistance
reading is measured on the ohmmeter.
Record this reading. Move the joystick fully
into the boom lower position. Record this
reading.
CIRCUIT BOARD
CONNECTOR
STRIPS
PINION
SETSCREWS
PINION
GEAR
POTENTIOMETER
SHAFT
MA6060